diff --git a/tools/node_modules/eslint/lib/linter.js b/tools/node_modules/eslint/lib/linter.js index 8f7bdf9e4c79c3..b47e6eb1fcfb6a 100644 --- a/tools/node_modules/eslint/lib/linter.js +++ b/tools/node_modules/eslint/lib/linter.js @@ -888,6 +888,15 @@ module.exports = class Linter { this.environments = new Environments(); } + /** + * Getter for package version. + * @static + * @returns {string} The version from package.json. + */ + static get version() { + return pkg.version; + } + /** * Configuration object for the `verify` API. A JS representation of the eslintrc files. * @typedef {Object} ESLintConfig diff --git a/tools/node_modules/eslint/lib/rules/no-irregular-whitespace.js b/tools/node_modules/eslint/lib/rules/no-irregular-whitespace.js index 729f829a1f71ea..de6934c635ac33 100644 --- a/tools/node_modules/eslint/lib/rules/no-irregular-whitespace.js +++ b/tools/node_modules/eslint/lib/rules/no-irregular-whitespace.js @@ -81,9 +81,7 @@ module.exports = { const locStart = node.loc.start; const locEnd = node.loc.end; - errors = errors.filter(error => { - const errorLoc = error[1]; - + errors = errors.filter(({ loc: errorLoc }) => { if (errorLoc.line >= locStart.line && errorLoc.line <= locEnd.line) { if (errorLoc.column >= locStart.column && (errorLoc.column <= locEnd.column || errorLoc.line < locEnd.line)) { return false; @@ -157,7 +155,7 @@ module.exports = { column: match.index }; - errors.push([node, location, "Irregular whitespace not allowed."]); + errors.push({ node, message: "Irregular whitespace not allowed.", loc: location }); } }); } @@ -182,7 +180,7 @@ module.exports = { column: sourceLines[lineIndex].length }; - errors.push([node, location, "Irregular whitespace not allowed."]); + errors.push({ node, message: "Irregular whitespace not allowed.", loc: location }); lastLineIndex = lineIndex; } } @@ -224,9 +222,7 @@ module.exports = { } // If we have any errors remaining report on them - errors.forEach(error => { - context.report(...error); - }); + errors.forEach(error => context.report(error)); }; } else { nodes.Program = noop; diff --git a/tools/node_modules/eslint/lib/rules/prefer-const.js b/tools/node_modules/eslint/lib/rules/prefer-const.js index 774fcf06437626..8b3bc5e0e436d3 100644 --- a/tools/node_modules/eslint/lib/rules/prefer-const.js +++ b/tools/node_modules/eslint/lib/rules/prefer-const.js @@ -57,6 +57,7 @@ function canBecomeVariableDeclaration(identifier) { * @returns {boolean} Indicates if the variable is from outer scope or function parameters. */ function isOuterVariableInDestructing(name, initScope) { + if (initScope.through.find(ref => ref.resolved && ref.resolved.name === name)) { return true; } @@ -96,6 +97,54 @@ function getDestructuringHost(reference) { return node; } +/** + * Determines if a destructuring assignment node contains + * any MemberExpression nodes. This is used to determine if a + * variable that is only written once using destructuring can be + * safely converted into a const declaration. + * @param {ASTNode} node The ObjectPattern or ArrayPattern node to check. + * @returns {boolean} True if the destructuring pattern contains + * a MemberExpression, false if not. + */ +function hasMemberExpressionAssignment(node) { + switch (node.type) { + case "ObjectPattern": + return node.properties.some(prop => { + if (prop) { + + /* + * Spread elements have an argument property while + * others have a value property. Because different + * parsers use different node types for spread elements, + * we just check if there is an argument property. + */ + return hasMemberExpressionAssignment(prop.argument || prop.value); + } + + return false; + }); + + case "ArrayPattern": + return node.elements.some(element => { + if (element) { + return hasMemberExpressionAssignment(element); + } + + return false; + }); + + case "AssignmentPattern": + return hasMemberExpressionAssignment(node.left); + + case "MemberExpression": + return true; + + // no default + } + + return false; +} + /** * Gets an identifier node of a given variable. * @@ -148,7 +197,8 @@ function getIdentifierIfShouldBeConst(variable, ignoreReadBeforeAssign) { if (destructuringHost !== null && destructuringHost.left !== void 0) { const leftNode = destructuringHost.left; - let hasOuterVariables = false; + let hasOuterVariables = false, + hasNonIdentifiers = false; if (leftNode.type === "ObjectPattern") { const properties = leftNode.properties; @@ -157,16 +207,23 @@ function getIdentifierIfShouldBeConst(variable, ignoreReadBeforeAssign) { .filter(prop => prop.value) .map(prop => prop.value.name) .some(name => isOuterVariableInDestructing(name, variable.scope)); + + hasNonIdentifiers = hasMemberExpressionAssignment(leftNode); + } else if (leftNode.type === "ArrayPattern") { const elements = leftNode.elements; hasOuterVariables = elements .map(element => element && element.name) .some(name => isOuterVariableInDestructing(name, variable.scope)); + + hasNonIdentifiers = hasMemberExpressionAssignment(leftNode); } - if (hasOuterVariables) { + + if (hasOuterVariables || hasNonIdentifiers) { return null; } + } writer = reference; @@ -192,9 +249,11 @@ function getIdentifierIfShouldBeConst(variable, ignoreReadBeforeAssign) { if (!shouldBeConst) { return null; } + if (isReadBeforeInit) { return variable.defs[0].name; } + return writer.identifier; } @@ -295,7 +354,7 @@ module.exports = { create(context) { const options = context.options[0] || {}; const sourceCode = context.getSourceCode(); - const checkingMixedDestructuring = options.destructuring !== "all"; + const shouldMatchAnyDestructuredVariable = options.destructuring !== "all"; const ignoreReadBeforeAssign = options.ignoreReadBeforeAssign === true; const variables = []; @@ -316,7 +375,7 @@ module.exports = { function checkGroup(nodes) { const nodesToReport = nodes.filter(Boolean); - if (nodes.length && (checkingMixedDestructuring || nodesToReport.length === nodes.length)) { + if (nodes.length && (shouldMatchAnyDestructuredVariable || nodesToReport.length === nodes.length)) { const varDeclParent = findUp(nodes[0], "VariableDeclaration", parentNode => parentNode.type.endsWith("Statement")); const shouldFix = varDeclParent && diff --git a/tools/node_modules/eslint/lib/testers/rule-tester.js b/tools/node_modules/eslint/lib/testers/rule-tester.js index 9fbca945b62ee4..6d1bba989fdeea 100644 --- a/tools/node_modules/eslint/lib/testers/rule-tester.js +++ b/tools/node_modules/eslint/lib/testers/rule-tester.js @@ -397,7 +397,7 @@ class RuleTester { */ function assertASTDidntChange(beforeAST, afterAST) { if (!lodash.isEqual(beforeAST, afterAST)) { - assert.fail(null, null, "Rule should not modify AST."); + assert.fail("Rule should not modify AST."); } } @@ -551,7 +551,7 @@ class RuleTester { } else { // Message was an unexpected type - assert.fail(message, null, "Error should be a string, object, or RegExp."); + assert.fail(`Error should be a string, object, or RegExp, but found (${util.inspect(message)})`); } } } diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/README.md b/tools/node_modules/eslint/node_modules/acorn-jsx/README.md index cd9674c0b38b03..2bbb1d99fd8cfa 100644 --- a/tools/node_modules/eslint/node_modules/acorn-jsx/README.md +++ b/tools/node_modules/eslint/node_modules/acorn-jsx/README.md @@ -17,44 +17,24 @@ Please note that this tool only parses source code to JSX AST, which is useful f ## Usage -You can use module directly in order to get Acorn instance with plugin installed: +Requiring this module provides you with an Acorn plugin that you can use like this: ```javascript -var acorn = require('acorn-jsx'); -``` - -Or you can use `inject.js` for injecting plugin into your own version of Acorn like following: - -```javascript -var acorn = require('acorn-jsx/inject')(require('./custom-acorn')); -``` - -Then, use `plugins` option whenever you need to support JSX while parsing: - -```javascript -var ast = acorn.parse(code, { - plugins: { jsx: true } -}); +var acorn = require("acorn"); +var jsx = require("acorn-jsx"); +acorn.Parser.extend(jsx()).parse("my(, 'code');"); ``` Note that official spec doesn't support mix of XML namespaces and object-style access in tag names (#27) like in ``, so it was deprecated in `acorn-jsx@3.0`. If you still want to opt-in to support of such constructions, you can pass the following option: ```javascript -var ast = acorn.parse(code, { - plugins: { - jsx: { allowNamespacedObjects: true } - } -}); +acorn.Parser.extend(jsx({ allowNamespacedObjects: true })) ``` Also, since most apps use pure React transformer, a new option was introduced that allows to prohibit namespaces completely: ```javascript -var ast = acorn.parse(code, { - plugins: { - jsx: { allowNamespaces: false } - } -}); +acorn.Parser.extend(jsx({ allowNamespaces: false })) ``` Note that by default `allowNamespaces` is enabled for spec compliancy. diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/index.js b/tools/node_modules/eslint/node_modules/acorn-jsx/index.js index 58c8677740ce26..292315f65bfc90 100644 --- a/tools/node_modules/eslint/node_modules/acorn-jsx/index.js +++ b/tools/node_modules/eslint/node_modules/acorn-jsx/index.js @@ -1,3 +1,431 @@ -'use strict'; +const XHTMLEntities = require('./xhtml'); -module.exports = require('./inject')(require('acorn')); +const hexNumber = /^[\da-fA-F]+$/; +const decimalNumber = /^\d+$/; + +const {tokTypes: tt, TokContext, tokContexts, TokenType, isNewLine, isIdentifierStart, isIdentifierChar} = require("acorn"); + +const tc_oTag = new TokContext('...', true, true); + +const tok = { + jsxName: new TokenType('jsxName'), + jsxText: new TokenType('jsxText', {beforeExpr: true}), + jsxTagStart: new TokenType('jsxTagStart'), + jsxTagEnd: new TokenType('jsxTagEnd') +} + +tok.jsxTagStart.updateContext = function() { + this.context.push(tc_expr); // treat as beginning of JSX expression + this.context.push(tc_oTag); // start opening tag context + this.exprAllowed = false; +}; +tok.jsxTagEnd.updateContext = function(prevType) { + let out = this.context.pop(); + if (out === tc_oTag && prevType === tt.slash || out === tc_cTag) { + this.context.pop(); + this.exprAllowed = this.curContext() === tc_expr; + } else { + this.exprAllowed = true; + } +}; + +// Transforms JSX element name to string. + +function getQualifiedJSXName(object) { + if (!object) + return object; + + if (object.type === 'JSXIdentifier') + return object.name; + + if (object.type === 'JSXNamespacedName') + return object.namespace.name + ':' + object.name.name; + + if (object.type === 'JSXMemberExpression') + return getQualifiedJSXName(object.object) + '.' + + getQualifiedJSXName(object.property); +} + +module.exports = function(options = {}) { + return function(Parser) { + return plugin({ + allowNamespaces: options.allowNamespaces !== false, + allowNamespacedObjects: !!options.allowNamespacedObjects + }, Parser); + } +} +module.exports.tokTypes = tok + +function plugin(options, Parser) { + return class extends Parser { + // Reads inline JSX contents token. + jsx_readToken() { + let out = '', chunkStart = this.pos; + for (;;) { + if (this.pos >= this.input.length) + this.raise(this.start, 'Unterminated JSX contents'); + let ch = this.input.charCodeAt(this.pos); + + switch (ch) { + case 60: // '<' + case 123: // '{' + if (this.pos === this.start) { + if (ch === 60 && this.exprAllowed) { + ++this.pos; + return this.finishToken(tok.jsxTagStart); + } + return this.getTokenFromCode(ch); + } + out += this.input.slice(chunkStart, this.pos); + return this.finishToken(tok.jsxText, out); + + case 38: // '&' + out += this.input.slice(chunkStart, this.pos); + out += this.jsx_readEntity(); + chunkStart = this.pos; + break; + + default: + if (isNewLine(ch)) { + out += this.input.slice(chunkStart, this.pos); + out += this.jsx_readNewLine(true); + chunkStart = this.pos; + } else { + ++this.pos; + } + } + } + } + + jsx_readNewLine(normalizeCRLF) { + let ch = this.input.charCodeAt(this.pos); + let out; + ++this.pos; + if (ch === 13 && this.input.charCodeAt(this.pos) === 10) { + ++this.pos; + out = normalizeCRLF ? '\n' : '\r\n'; + } else { + out = String.fromCharCode(ch); + } + if (this.options.locations) { + ++this.curLine; + this.lineStart = this.pos; + } + + return out; + }; + + jsx_readString(quote) { + let out = '', chunkStart = ++this.pos; + for (;;) { + if (this.pos >= this.input.length) + this.raise(this.start, 'Unterminated string constant'); + let ch = this.input.charCodeAt(this.pos); + if (ch === quote) break; + if (ch === 38) { // '&' + out += this.input.slice(chunkStart, this.pos); + out += this.jsx_readEntity(); + chunkStart = this.pos; + } else if (isNewLine(ch)) { + out += this.input.slice(chunkStart, this.pos); + out += this.jsx_readNewLine(false); + chunkStart = this.pos; + } else { + ++this.pos; + } + } + out += this.input.slice(chunkStart, this.pos++); + return this.finishToken(tt.string, out); + } + + jsx_readEntity() { + let str = '', count = 0, entity; + let ch = this.input[this.pos]; + if (ch !== '&') + this.raise(this.pos, 'Entity must start with an ampersand'); + let startPos = ++this.pos; + while (this.pos < this.input.length && count++ < 10) { + ch = this.input[this.pos++]; + if (ch === ';') { + if (str[0] === '#') { + if (str[1] === 'x') { + str = str.substr(2); + if (hexNumber.test(str)) + entity = String.fromCharCode(parseInt(str, 16)); + } else { + str = str.substr(1); + if (decimalNumber.test(str)) + entity = String.fromCharCode(parseInt(str, 10)); + } + } else { + entity = XHTMLEntities[str]; + } + break; + } + str += ch; + } + if (!entity) { + this.pos = startPos; + return '&'; + } + return entity; + } + + // Read a JSX identifier (valid tag or attribute name). + // + // Optimized version since JSX identifiers can't contain + // escape characters and so can be read as single slice. + // Also assumes that first character was already checked + // by isIdentifierStart in readToken. + + jsx_readWord() { + let ch, start = this.pos; + do { + ch = this.input.charCodeAt(++this.pos); + } while (isIdentifierChar(ch) || ch === 45); // '-' + return this.finishToken(tok.jsxName, this.input.slice(start, this.pos)); + } + + // Parse next token as JSX identifier + + jsx_parseIdentifier() { + let node = this.startNode(); + if (this.type === tok.jsxName) + node.name = this.value; + else if (this.type.keyword) + node.name = this.type.keyword; + else + this.unexpected(); + this.next(); + return this.finishNode(node, 'JSXIdentifier'); + } + + // Parse namespaced identifier. + + jsx_parseNamespacedName() { + let startPos = this.start, startLoc = this.startLoc; + let name = this.jsx_parseIdentifier(); + if (!options.allowNamespaces || !this.eat(tt.colon)) return name; + var node = this.startNodeAt(startPos, startLoc); + node.namespace = name; + node.name = this.jsx_parseIdentifier(); + return this.finishNode(node, 'JSXNamespacedName'); + } + + // Parses element name in any form - namespaced, member + // or single identifier. + + jsx_parseElementName() { + if (this.type === tok.jsxTagEnd) return ''; + let startPos = this.start, startLoc = this.startLoc; + let node = this.jsx_parseNamespacedName(); + if (this.type === tt.dot && node.type === 'JSXNamespacedName' && !options.allowNamespacedObjects) { + this.unexpected(); + } + while (this.eat(tt.dot)) { + let newNode = this.startNodeAt(startPos, startLoc); + newNode.object = node; + newNode.property = this.jsx_parseIdentifier(); + node = this.finishNode(newNode, 'JSXMemberExpression'); + } + return node; + } + + // Parses any type of JSX attribute value. + + jsx_parseAttributeValue() { + switch (this.type) { + case tt.braceL: + let node = this.jsx_parseExpressionContainer(); + if (node.expression.type === 'JSXEmptyExpression') + this.raise(node.start, 'JSX attributes must only be assigned a non-empty expression'); + return node; + + case tok.jsxTagStart: + case tt.string: + return this.parseExprAtom(); + + default: + this.raise(this.start, 'JSX value should be either an expression or a quoted JSX text'); + } + } + + // JSXEmptyExpression is unique type since it doesn't actually parse anything, + // and so it should start at the end of last read token (left brace) and finish + // at the beginning of the next one (right brace). + + jsx_parseEmptyExpression() { + let node = this.startNodeAt(this.lastTokEnd, this.lastTokEndLoc); + return this.finishNodeAt(node, 'JSXEmptyExpression', this.start, this.startLoc); + } + + // Parses JSX expression enclosed into curly brackets. + + jsx_parseExpressionContainer() { + let node = this.startNode(); + this.next(); + node.expression = this.type === tt.braceR + ? this.jsx_parseEmptyExpression() + : this.parseExpression(); + this.expect(tt.braceR); + return this.finishNode(node, 'JSXExpressionContainer'); + } + + // Parses following JSX attribute name-value pair. + + jsx_parseAttribute() { + let node = this.startNode(); + if (this.eat(tt.braceL)) { + this.expect(tt.ellipsis); + node.argument = this.parseMaybeAssign(); + this.expect(tt.braceR); + return this.finishNode(node, 'JSXSpreadAttribute'); + } + node.name = this.jsx_parseNamespacedName(); + node.value = this.eat(tt.eq) ? this.jsx_parseAttributeValue() : null; + return this.finishNode(node, 'JSXAttribute'); + } + + // Parses JSX opening tag starting after '<'. + + jsx_parseOpeningElementAt(startPos, startLoc) { + let node = this.startNodeAt(startPos, startLoc); + node.attributes = []; + let nodeName = this.jsx_parseElementName(); + if (nodeName) node.name = nodeName; + while (this.type !== tt.slash && this.type !== tok.jsxTagEnd) + node.attributes.push(this.jsx_parseAttribute()); + node.selfClosing = this.eat(tt.slash); + this.expect(tok.jsxTagEnd); + return this.finishNode(node, nodeName ? 'JSXOpeningElement' : 'JSXOpeningFragment'); + } + + // Parses JSX closing tag starting after ''); + } + } + let fragmentOrElement = openingElement.name ? 'Element' : 'Fragment'; + + node['opening' + fragmentOrElement] = openingElement; + node['closing' + fragmentOrElement] = closingElement; + node.children = children; + if (this.type === tt.relational && this.value === "<") { + this.raise(this.start, "Adjacent JSX elements must be wrapped in an enclosing tag"); + } + return this.finishNode(node, 'JSX' + fragmentOrElement); + } + + // Parse JSX text + + jsx_parseText(value) { + let node = this.parseLiteral(value); + node.type = "JSXText"; + return node; + } + + // Parses entire JSX element from current position. + + jsx_parseElement() { + let startPos = this.start, startLoc = this.startLoc; + this.next(); + return this.jsx_parseElementAt(startPos, startLoc); + } + + parseExprAtom(refShortHandDefaultPos) { + if (this.type === tok.jsxText) + return this.jsx_parseText(this.value); + else if (this.type === tok.jsxTagStart) + return this.jsx_parseElement(); + else + return super.parseExprAtom(refShortHandDefaultPos); + } + + readToken(code) { + let context = this.curContext(); + + if (context === tc_expr) return this.jsx_readToken(); + + if (context === tc_oTag || context === tc_cTag) { + if (isIdentifierStart(code)) return this.jsx_readWord(); + + if (code == 62) { + ++this.pos; + return this.finishToken(tok.jsxTagEnd); + } + + if ((code === 34 || code === 39) && context == tc_oTag) + return this.jsx_readString(code); + } + + if (code === 60 && this.exprAllowed && this.input.charCodeAt(this.pos + 1) !== 33) { + ++this.pos; + return this.finishToken(tok.jsxTagStart); + } + return super.readToken(code) + } + + updateContext(prevType) { + if (this.type == tt.braceL) { + var curContext = this.curContext(); + if (curContext == tc_oTag) this.context.push(tokContexts.b_expr); + else if (curContext == tc_expr) this.context.push(tokContexts.b_tmpl); + else super.updateContext(prevType) + this.exprAllowed = true; + } else if (this.type === tt.slash && prevType === tok.jsxTagStart) { + this.context.length -= 2; // do not consider JSX expr -> JSX open tag -> ... anymore + this.context.push(tc_cTag); // reconsider as closing tag context + this.exprAllowed = false; + } else { + return super.updateContext(prevType); + } + } + }; +}; diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/inject.js b/tools/node_modules/eslint/node_modules/acorn-jsx/inject.js deleted file mode 100644 index 33806c72ce0a1c..00000000000000 --- a/tools/node_modules/eslint/node_modules/acorn-jsx/inject.js +++ /dev/null @@ -1,449 +0,0 @@ -'use strict'; - -var XHTMLEntities = require('./xhtml'); - -var hexNumber = /^[\da-fA-F]+$/; -var decimalNumber = /^\d+$/; - -module.exports = function(acorn) { - var tt = acorn.tokTypes; - var tc = acorn.tokContexts; - - tc.j_oTag = new acorn.TokContext('...', true, true); - - tt.jsxName = new acorn.TokenType('jsxName'); - tt.jsxText = new acorn.TokenType('jsxText', {beforeExpr: true}); - tt.jsxTagStart = new acorn.TokenType('jsxTagStart'); - tt.jsxTagEnd = new acorn.TokenType('jsxTagEnd'); - - tt.jsxTagStart.updateContext = function() { - this.context.push(tc.j_expr); // treat as beginning of JSX expression - this.context.push(tc.j_oTag); // start opening tag context - this.exprAllowed = false; - }; - tt.jsxTagEnd.updateContext = function(prevType) { - var out = this.context.pop(); - if (out === tc.j_oTag && prevType === tt.slash || out === tc.j_cTag) { - this.context.pop(); - this.exprAllowed = this.curContext() === tc.j_expr; - } else { - this.exprAllowed = true; - } - }; - - var pp = acorn.Parser.prototype; - - // Reads inline JSX contents token. - - pp.jsx_readToken = function() { - var out = '', chunkStart = this.pos; - for (;;) { - if (this.pos >= this.input.length) - this.raise(this.start, 'Unterminated JSX contents'); - var ch = this.input.charCodeAt(this.pos); - - switch (ch) { - case 60: // '<' - case 123: // '{' - if (this.pos === this.start) { - if (ch === 60 && this.exprAllowed) { - ++this.pos; - return this.finishToken(tt.jsxTagStart); - } - return this.getTokenFromCode(ch); - } - out += this.input.slice(chunkStart, this.pos); - return this.finishToken(tt.jsxText, out); - - case 38: // '&' - out += this.input.slice(chunkStart, this.pos); - out += this.jsx_readEntity(); - chunkStart = this.pos; - break; - - default: - if (acorn.isNewLine(ch)) { - out += this.input.slice(chunkStart, this.pos); - out += this.jsx_readNewLine(true); - chunkStart = this.pos; - } else { - ++this.pos; - } - } - } - }; - - pp.jsx_readNewLine = function(normalizeCRLF) { - var ch = this.input.charCodeAt(this.pos); - var out; - ++this.pos; - if (ch === 13 && this.input.charCodeAt(this.pos) === 10) { - ++this.pos; - out = normalizeCRLF ? '\n' : '\r\n'; - } else { - out = String.fromCharCode(ch); - } - if (this.options.locations) { - ++this.curLine; - this.lineStart = this.pos; - } - - return out; - }; - - pp.jsx_readString = function(quote) { - var out = '', chunkStart = ++this.pos; - for (;;) { - if (this.pos >= this.input.length) - this.raise(this.start, 'Unterminated string constant'); - var ch = this.input.charCodeAt(this.pos); - if (ch === quote) break; - if (ch === 38) { // '&' - out += this.input.slice(chunkStart, this.pos); - out += this.jsx_readEntity(); - chunkStart = this.pos; - } else if (acorn.isNewLine(ch)) { - out += this.input.slice(chunkStart, this.pos); - out += this.jsx_readNewLine(false); - chunkStart = this.pos; - } else { - ++this.pos; - } - } - out += this.input.slice(chunkStart, this.pos++); - return this.finishToken(tt.string, out); - }; - - pp.jsx_readEntity = function() { - var str = '', count = 0, entity; - var ch = this.input[this.pos]; - if (ch !== '&') - this.raise(this.pos, 'Entity must start with an ampersand'); - var startPos = ++this.pos; - while (this.pos < this.input.length && count++ < 10) { - ch = this.input[this.pos++]; - if (ch === ';') { - if (str[0] === '#') { - if (str[1] === 'x') { - str = str.substr(2); - if (hexNumber.test(str)) - entity = String.fromCharCode(parseInt(str, 16)); - } else { - str = str.substr(1); - if (decimalNumber.test(str)) - entity = String.fromCharCode(parseInt(str, 10)); - } - } else { - entity = XHTMLEntities[str]; - } - break; - } - str += ch; - } - if (!entity) { - this.pos = startPos; - return '&'; - } - return entity; - }; - - - // Read a JSX identifier (valid tag or attribute name). - // - // Optimized version since JSX identifiers can't contain - // escape characters and so can be read as single slice. - // Also assumes that first character was already checked - // by isIdentifierStart in readToken. - - pp.jsx_readWord = function() { - var ch, start = this.pos; - do { - ch = this.input.charCodeAt(++this.pos); - } while (acorn.isIdentifierChar(ch) || ch === 45); // '-' - return this.finishToken(tt.jsxName, this.input.slice(start, this.pos)); - }; - - // Transforms JSX element name to string. - - function getQualifiedJSXName(object) { - if (!object) - return object; - - if (object.type === 'JSXIdentifier') - return object.name; - - if (object.type === 'JSXNamespacedName') - return object.namespace.name + ':' + object.name.name; - - if (object.type === 'JSXMemberExpression') - return getQualifiedJSXName(object.object) + '.' + - getQualifiedJSXName(object.property); - } - - // Parse next token as JSX identifier - - pp.jsx_parseIdentifier = function() { - var node = this.startNode(); - if (this.type === tt.jsxName) - node.name = this.value; - else if (this.type.keyword) - node.name = this.type.keyword; - else - this.unexpected(); - this.next(); - return this.finishNode(node, 'JSXIdentifier'); - }; - - // Parse namespaced identifier. - - pp.jsx_parseNamespacedName = function() { - var startPos = this.start, startLoc = this.startLoc; - var name = this.jsx_parseIdentifier(); - if (!this.options.plugins.jsx.allowNamespaces || !this.eat(tt.colon)) return name; - var node = this.startNodeAt(startPos, startLoc); - node.namespace = name; - node.name = this.jsx_parseIdentifier(); - return this.finishNode(node, 'JSXNamespacedName'); - }; - - // Parses element name in any form - namespaced, member - // or single identifier. - - pp.jsx_parseElementName = function() { - if (this.type === tt.jsxTagEnd) - return ''; - var startPos = this.start, startLoc = this.startLoc; - var node = this.jsx_parseNamespacedName(); - if (this.type === tt.dot && node.type === 'JSXNamespacedName' && !this.options.plugins.jsx.allowNamespacedObjects) { - this.unexpected(); - } - while (this.eat(tt.dot)) { - var newNode = this.startNodeAt(startPos, startLoc); - newNode.object = node; - newNode.property = this.jsx_parseIdentifier(); - node = this.finishNode(newNode, 'JSXMemberExpression'); - } - return node; - }; - - // Parses any type of JSX attribute value. - - pp.jsx_parseAttributeValue = function() { - switch (this.type) { - case tt.braceL: - var node = this.jsx_parseExpressionContainer(); - if (node.expression.type === 'JSXEmptyExpression') - this.raise(node.start, 'JSX attributes must only be assigned a non-empty expression'); - return node; - - case tt.jsxTagStart: - case tt.string: - return this.parseExprAtom(); - - default: - this.raise(this.start, 'JSX value should be either an expression or a quoted JSX text'); - } - }; - - // JSXEmptyExpression is unique type since it doesn't actually parse anything, - // and so it should start at the end of last read token (left brace) and finish - // at the beginning of the next one (right brace). - - pp.jsx_parseEmptyExpression = function() { - var node = this.startNodeAt(this.lastTokEnd, this.lastTokEndLoc); - return this.finishNodeAt(node, 'JSXEmptyExpression', this.start, this.startLoc); - }; - - // Parses JSX expression enclosed into curly brackets. - - - pp.jsx_parseExpressionContainer = function() { - var node = this.startNode(); - this.next(); - node.expression = this.type === tt.braceR - ? this.jsx_parseEmptyExpression() - : this.parseExpression(); - this.expect(tt.braceR); - return this.finishNode(node, 'JSXExpressionContainer'); - }; - - // Parses following JSX attribute name-value pair. - - pp.jsx_parseAttribute = function() { - var node = this.startNode(); - if (this.eat(tt.braceL)) { - this.expect(tt.ellipsis); - node.argument = this.parseMaybeAssign(); - this.expect(tt.braceR); - return this.finishNode(node, 'JSXSpreadAttribute'); - } - node.name = this.jsx_parseNamespacedName(); - node.value = this.eat(tt.eq) ? this.jsx_parseAttributeValue() : null; - return this.finishNode(node, 'JSXAttribute'); - }; - - // Parses JSX opening tag starting after '<'. - - pp.jsx_parseOpeningElementAt = function(startPos, startLoc) { - var node = this.startNodeAt(startPos, startLoc); - node.attributes = []; - var nodeName = this.jsx_parseElementName(); - if (nodeName) node.name = nodeName; - while (this.type !== tt.slash && this.type !== tt.jsxTagEnd) - node.attributes.push(this.jsx_parseAttribute()); - node.selfClosing = this.eat(tt.slash); - this.expect(tt.jsxTagEnd); - return this.finishNode(node, nodeName ? 'JSXOpeningElement' : 'JSXOpeningFragment'); - }; - - // Parses JSX closing tag starting after ''); - } - } - - node.openingElement = openingElement; - node.closingElement = closingElement; - node.children = children; - if (this.type === tt.relational && this.value === "<") { - this.raise(this.start, "Adjacent JSX elements must be wrapped in an enclosing tag"); - } - return this.finishNode(node, openingElement.name ? 'JSXElement' : 'JSXFragment'); - }; - - // Parse JSX text - - pp.jsx_parseText = function(value) { - var node = this.parseLiteral(value); - node.type = "JSXText"; - - return node; - }; - - // Parses entire JSX element from current position. - - pp.jsx_parseElement = function() { - var startPos = this.start, startLoc = this.startLoc; - this.next(); - return this.jsx_parseElementAt(startPos, startLoc); - }; - - acorn.plugins.jsx = function(instance, opts) { - if (!opts) { - return; - } - - if (typeof opts !== 'object') { - opts = {}; - } - - instance.options.plugins.jsx = { - allowNamespaces: opts.allowNamespaces !== false, - allowNamespacedObjects: !!opts.allowNamespacedObjects - }; - - instance.extend('parseExprAtom', function(inner) { - return function(refShortHandDefaultPos) { - if (this.type === tt.jsxText) - return this.jsx_parseText(this.value); - else if (this.type === tt.jsxTagStart) - return this.jsx_parseElement(); - else - return inner.call(this, refShortHandDefaultPos); - }; - }); - - instance.extend('readToken', function(inner) { - return function(code) { - var context = this.curContext(); - - if (context === tc.j_expr) return this.jsx_readToken(); - - if (context === tc.j_oTag || context === tc.j_cTag) { - if (acorn.isIdentifierStart(code)) return this.jsx_readWord(); - - if (code == 62) { - ++this.pos; - return this.finishToken(tt.jsxTagEnd); - } - - if ((code === 34 || code === 39) && context == tc.j_oTag) - return this.jsx_readString(code); - } - - if (code === 60 && this.exprAllowed && this.input.charCodeAt(this.pos + 1) !== 33) { - ++this.pos; - return this.finishToken(tt.jsxTagStart); - } - return inner.call(this, code); - }; - }); - - instance.extend('updateContext', function(inner) { - return function(prevType) { - if (this.type == tt.braceL) { - var curContext = this.curContext(); - if (curContext == tc.j_oTag) this.context.push(tc.b_expr); - else if (curContext == tc.j_expr) this.context.push(tc.b_tmpl); - else inner.call(this, prevType); - this.exprAllowed = true; - } else if (this.type === tt.slash && prevType === tt.jsxTagStart) { - this.context.length -= 2; // do not consider JSX expr -> JSX open tag -> ... anymore - this.context.push(tc.j_cTag); // reconsider as closing tag context - this.exprAllowed = false; - } else { - return inner.call(this, prevType); - } - }; - }); - }; - - return acorn; -}; diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/package.json b/tools/node_modules/eslint/node_modules/acorn-jsx/package.json index 138fee460f07f0..d22757b6a8d450 100644 --- a/tools/node_modules/eslint/node_modules/acorn-jsx/package.json +++ b/tools/node_modules/eslint/node_modules/acorn-jsx/package.json @@ -3,14 +3,10 @@ "url": "https://github.com/RReverser/acorn-jsx/issues" }, "bundleDependencies": false, - "dependencies": { - "acorn": "^5.0.3" - }, "deprecated": false, "description": "Alternative, faster React.js JSX parser", "devDependencies": { - "chai": "^3.0.0", - "mocha": "^3.3.0" + "acorn": "^6.0.0" }, "homepage": "https://github.com/RReverser/acorn-jsx", "license": "MIT", @@ -22,6 +18,9 @@ } ], "name": "acorn-jsx", + "peerDependencies": { + "acorn": "^6.0.0" + }, "repository": { "type": "git", "url": "git+https://github.com/RReverser/acorn-jsx.git" @@ -29,5 +28,5 @@ "scripts": { "test": "node test/run.js" }, - "version": "4.1.1" + "version": "5.0.0" } \ No newline at end of file diff --git a/tools/node_modules/eslint/node_modules/acorn/AUTHORS b/tools/node_modules/eslint/node_modules/acorn/AUTHORS deleted file mode 100644 index c5ac22cbd7c6ba..00000000000000 --- a/tools/node_modules/eslint/node_modules/acorn/AUTHORS +++ /dev/null @@ -1,79 +0,0 @@ -List of Acorn contributors. Updated before every release. - -Adrian Heine -Adrian Rakovsky -Alistair Braidwood -Amila Welihinda -Andres Suarez -Angelo -Aparajita Fishman -Arian Stolwijk -Artem Govorov -Boopesh Mahendran -Bradley Heinz -Brandon Mills -Charles Hughes -Charmander -Chris McKnight -Conrad Irwin -Daniel Tschinder -David Bonnet -Domenico Matteo -ehmicky -Eugene Obrezkov -Felix Maier -Forbes Lindesay -Gilad Peleg -impinball -Ingvar Stepanyan -Jackson Ray Hamilton -Jesse McCarthy -Jiaxing Wang -Joel Kemp -Johannes Herr -John-David Dalton -Jordan Klassen -Jürg Lehni -Kai Cataldo -keeyipchan -Keheliya Gallaba -Kevin Irish -Kevin Kwok -krator -laosb -luckyzeng -Marek -Marijn Haverbeke -Martin Carlberg -Mat Garcia -Mathias Bynens -Mathieu 'p01' Henri -Matthew Bastien -Max Schaefer -Max Zerzouri -Mihai Bazon -Mike Rennie -naoh -Nicholas C. Zakas -Nick Fitzgerald -Olivier Thomann -Oskar Schöldström -Paul Harper -Peter Rust -PlNG -Prayag Verma -ReadmeCritic -r-e-d -Renée Kooi -Richard Gibson -Rich Harris -Sebastian McKenzie -Shahar Soel -Sheel Bedi -Simen Bekkhus -Teddy Katz -Timothy Gu -Toru Nagashima -Victor Homyakov -Wexpo Lyu -zsjforcn diff --git a/tools/node_modules/eslint/node_modules/acorn/README.md b/tools/node_modules/eslint/node_modules/acorn/README.md index de53f513f49e2f..e66dac31de22b2 100644 --- a/tools/node_modules/eslint/node_modules/acorn/README.md +++ b/tools/node_modules/eslint/node_modules/acorn/README.md @@ -1,11 +1,6 @@ # Acorn -[![Build Status](https://travis-ci.org/acornjs/acorn.svg?branch=master)](https://travis-ci.org/acornjs/acorn) -[![NPM version](https://img.shields.io/npm/v/acorn.svg)](https://www.npmjs.com/package/acorn) -[![CDNJS](https://img.shields.io/cdnjs/v/acorn.svg)](https://cdnjs.com/libraries/acorn) -[Author funding status: ![maintainer happiness](https://marijnhaverbeke.nl/fund/status_s.png?force)](https://marijnhaverbeke.nl/fund/) - -A tiny, fast JavaScript parser, written completely in JavaScript. +A tiny, fast JavaScript parser written in JavaScript. ## Community @@ -20,9 +15,7 @@ and discussion, please use the ## Installation -The easiest way to install acorn is with [`npm`][npm]. - -[npm]: https://www.npmjs.com/ +The easiest way to install acorn is from [`npm`](https://www.npmjs.com/): ```sh npm install acorn @@ -34,36 +27,29 @@ Alternately, you can download the source and build acorn yourself: git clone https://github.com/acornjs/acorn.git cd acorn npm install -npm run build ``` -## Components - -When run in a CommonJS (node.js) or AMD environment, exported values -appear in the interfaces exposed by the individual files, as usual. -When loaded in the browser (Acorn works in any JS-enabled browser more -recent than IE5) without any kind of module management, a single -global object `acorn` will be defined, and all the exported properties -will be added to that. +## Interface -### Main parser +**parse**`(input, options)` is the main interface to the library. The +`input` parameter is a string, `options` can be undefined or an object +setting some of the options listed below. The return value will be an +abstract syntax tree object as specified by the [ESTree +spec](https://github.com/estree/estree). -This is implemented in `dist/acorn.js`, and is what you get when you -`require("acorn")` in node.js. - -**parse**`(input, options)` is used to parse a JavaScript program. -The `input` parameter is a string, `options` can be undefined or an -object setting some of the options listed below. The return value will -be an abstract syntax tree object as specified by the -[ESTree spec][estree]. +```javascript +let acorn = require("acorn"); +console.log(acorn.parse("1 + 1")); +``` -When encountering a syntax error, the parser will raise a -`SyntaxError` object with a meaningful message. The error object will -have a `pos` property that indicates the character offset at which the -error occurred, and a `loc` object that contains a `{line, column}` +When encountering a syntax error, the parser will raise a +`SyntaxError` object with a meaningful message. The error object will +have a `pos` property that indicates the string offset at which the +error occurred, and a `loc` object that contains a `{line, column}` object referring to that same position. -[estree]: https://github.com/estree/estree +Options can be provided by passing a second argument, which should be +an object containing any of these fields: - **ecmaVersion**: Indicates the ECMAScript version to parse. Must be either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018) or 10 (2019, partial @@ -71,7 +57,8 @@ object referring to that same position. reserved words, and support for new syntax features. Default is 7. **NOTE**: Only 'stage 4' (finalized) ECMAScript features are being - implemented by Acorn. + implemented by Acorn. Other proposed new features can be implemented + through plugins. - **sourceType**: Indicate the mode the code should be parsed in. Can be either `"script"` or `"module"`. This influences global strict mode @@ -100,7 +87,10 @@ object referring to that same position. declarations can only appear at a program's top level. Setting this option to `true` allows them anywhere where a statement is allowed. -- **allowAwaitOutsideFunction**: By default, `await` expressions can only appear inside `async` functions. Setting this option to `true` allows to have top-level `await` expressions. They are still not allowed in non-`async` functions, though. +- **allowAwaitOutsideFunction**: By default, `await` expressions can + only appear inside `async` functions. Setting this option to + `true` allows to have top-level `await` expressions. They are + still not allowed in non-`async` functions, though. - **allowHashBang**: When this is enabled (off by default), if the code starts with the characters `#!` (as in a shellscript), the @@ -159,9 +149,10 @@ object referring to that same position. - **ranges**: Nodes have their start and end characters offsets recorded in `start` and `end` properties (directly on the node, rather than the `loc` object, which holds line/column data. To also - add a [semi-standardized][range] `range` property holding a - `[start, end]` array with the same numbers, set the `ranges` option - to `true`. + add a + [semi-standardized](https://bugzilla.mozilla.org/show_bug.cgi?id=745678) + `range` property holding a `[start, end]` array with the same + numbers, set the `ranges` option to `true`. - **program**: It is possible to parse multiple files into a single AST by passing the tree produced by parsing the first file as the @@ -184,15 +175,10 @@ object referring to that same position. that have a single `expression` property containing the expression inside parentheses. -[range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678 - **parseExpressionAt**`(input, offset, options)` will parse a single expression in a string, and return its AST. It will not complain if there is more of the string left after the expression. -**getLineInfo**`(input, offset)` can be used to get a `{line, -column}` object for a given program string and character offset. - **tokenizer**`(input, options)` returns an object with a `getToken` method that can be called repeatedly to get the next token, a `{start, end, type, value}` object (with added `loc` property when the @@ -216,139 +202,30 @@ var tokens = [...acorn.tokenizer(str)]; **tokTypes** holds an object mapping names to the token type objects that end up in the `type` properties of tokens. -#### Note on using with [Escodegen][escodegen] - -Escodegen supports generating comments from AST, attached in -Esprima-specific format. In order to simulate same format in -Acorn, consider following example: - -```javascript -var comments = [], tokens = []; - -var ast = acorn.parse('var x = 42; // answer', { - // collect ranges for each node - ranges: true, - // collect comments in Esprima's format - onComment: comments, - // collect token ranges - onToken: tokens -}); - -// attach comments using collected information -escodegen.attachComments(ast, comments, tokens); - -// generate code -console.log(escodegen.generate(ast, {comment: true})); -// > 'var x = 42; // answer' -``` - -[escodegen]: https://github.com/estools/escodegen - -### dist/acorn_loose.js ### - -This file implements an error-tolerant parser. It exposes a single -function. The loose parser is accessible in node.js via `require("acorn/dist/acorn_loose")`. - -**parse_dammit**`(input, options)` takes the same arguments and -returns the same syntax tree as the `parse` function in `acorn.js`, -but never raises an error, and will do its best to parse syntactically -invalid code in as meaningful a way as it can. It'll insert identifier -nodes with name `"✖"` as placeholders in places where it can't make -sense of the input. Depends on `acorn.js`, because it uses the same -tokenizer. - -### dist/walk.js ### - -Implements an abstract syntax tree walker. Will store its interface in -`acorn.walk` when loaded without a module system. - -**simple**`(node, visitors, base, state)` does a 'simple' walk over -a tree. `node` should be the AST node to walk, and `visitors` an -object with properties whose names correspond to node types in the -[ESTree spec][estree]. The properties should contain functions -that will be called with the node object and, if applicable the state -at that point. The last two arguments are optional. `base` is a walker -algorithm, and `state` is a start state. The default walker will -simply visit all statements and expressions and not produce a -meaningful state. (An example of a use of state is to track scope at -each point in the tree.) - -```js -const acorn = require("acorn") -const walk = require("acorn/dist/walk") - -walk.simple(acorn.parse("let x = 10"), { - Literal(node) { - console.log(`Found a literal: ${node.value}`) - } -}) -``` +**getLineInfo**`(input, offset)` can be used to get a `{line, +column}` object for a given program string and offset. -**ancestor**`(node, visitors, base, state)` does a 'simple' walk over -a tree, building up an array of ancestor nodes (including the current node) -and passing the array to the callbacks as a third parameter. +### The `Parser` class -```js -const acorn = require("acorn") -const walk = require("acorn/dist/walk") +Instances of the **`Parser`** class contain all the state and logic +that drives a parse. It has static methods `parse`, +`parseExpressionAt`, and `tokenizer` that match the top-level +functions by the same name. -walk.ancestor(acorn.parse("foo('hi')"), { - Literal(_, ancestors) { - console.log("This literal's ancestors are:", - ancestors.map(n => n.type)) - } -}) -``` +When extending the parser with plugins, you need to call these methods +on the extended version of the class. To extend a parser with plugins, +you can use its static `extend` method. -**recursive**`(node, state, functions, base)` does a 'recursive' -walk, where the walker functions are responsible for continuing the -walk on the child nodes of their target node. `state` is the start -state, and `functions` should contain an object that maps node types -to walker functions. Such functions are called with `(node, state, c)` -arguments, and can cause the walk to continue on a sub-node by calling -the `c` argument on it with `(node, state)` arguments. The optional -`base` argument provides the fallback walker functions for node types -that aren't handled in the `functions` object. If not given, the -default walkers will be used. - -**make**`(functions, base)` builds a new walker object by using the -walker functions in `functions` and filling in the missing ones by -taking defaults from `base`. - -**full**`(node, callback, base, state)` does a 'full' -walk over a tree, calling the callback with the arguments (node, state, type) -for each node - -**fullAncestor**`(node, callback, base, state)` does a 'full' walk over -a tree, building up an array of ancestor nodes (including the current node) -and passing the array to the callbacks as a third parameter. - -```js -const acorn = require("acorn") -const walk = require("acorn/dist/walk") - -walk.full(acorn.parse("1 + 1"), node => { - console.log(`There's a ${node.type} node at ${node.ch}`) -}) +```javascript +var acorn = require("acorn"); +var jsx = require("acorn-jsx"); +var JSXParser = acorn.Parser.extend(jsx()); +JSXParser.parse("foo()"); ``` -**findNodeAt**`(node, start, end, test, base, state)` tries to -locate a node in a tree at the given start and/or end offsets, which -satisfies the predicate `test`. `start` and `end` can be either `null` -(as wildcard) or a number. `test` may be a string (indicating a node -type) or a function that takes `(nodeType, node)` arguments and -returns a boolean indicating whether this node is interesting. `base` -and `state` are optional, and can be used to specify a custom walker. -Nodes are tested from inner to outer, so if two nodes match the -boundaries, the inner one will be preferred. - -**findNodeAround**`(node, pos, test, base, state)` is a lot like -`findNodeAt`, but will match any node that exists 'around' (spanning) -the given position. - -**findNodeAfter**`(node, pos, test, base, state)` is similar to -`findNodeAround`, but will match all nodes *after* the given position -(testing outer nodes before inner nodes). +The `extend` method takes any number of plugin values, and returns a +new `Parser` class that includes the extra parser logic provided by +the plugins. ## Command line interface @@ -357,7 +234,7 @@ line. It accepts as arguments its input file and the following options: - `--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|--ecma10`: Sets the ECMAScript version - to parse. Default is version 7. + to parse. Default is version 9. - `--module`: Sets the parsing mode to `"module"`. Is set to `"script"` otherwise. @@ -365,7 +242,8 @@ options: "end" subobjects, each of which contains the one-based line and zero-based column numbers in `{line, column}` form. -- `--allow-hash-bang`: If the code starts with the characters #! (as in a shellscript), the first line will be treated as a comment. +- `--allow-hash-bang`: If the code starts with the characters #! (as + in a shellscript), the first line will be treated as a comment. - `--compact`: No whitespace is used in the AST output. @@ -375,82 +253,11 @@ options: The utility spits out the syntax tree as JSON data. -## Build system - -Acorn is written in ECMAScript 6, as a set of small modules, in the -project's `src` directory, and compiled down to bigger ECMAScript 3 -files in `dist` using [Browserify](http://browserify.org) and -[Babel](http://babeljs.io/). If you are already using Babel, you can -consider including the modules directly. - -The command-line test runner (`npm test`) uses the ES6 modules. The -browser-based test page (`test/index.html`) uses the compiled modules. -The `bin/build-acorn.js` script builds the latter from the former. - -If you are working on Acorn, you'll probably want to try the code out -directly, without an intermediate build step. In your scripts, you can -register the Babel require shim like this: - - require("babel-core/register") - -That will allow you to directly `require` the ES6 modules. - -## Plugins - -Acorn is designed support allow plugins which, within reasonable -bounds, redefine the way the parser works. Plugins can add new token -types and new tokenizer contexts (if necessary), and extend methods in -the parser object. This is not a clean, elegant API—using it requires -an understanding of Acorn's internals, and plugins are likely to break -whenever those internals are significantly changed. But still, it is -_possible_, in this way, to create parsers for JavaScript dialects -without forking all of Acorn. And in principle it is even possible to -combine such plugins, so that if you have, for example, a plugin for -parsing types and a plugin for parsing JSX-style XML literals, you -could load them both and parse code with both JSX tags and types. - -A plugin should register itself by adding a property to -`acorn.plugins`, which holds a function. Calling `acorn.parse`, a -`plugins` option can be passed, holding an object mapping plugin names -to configuration values (or just `true` for plugins that don't take -options). After the parser object has been created, the initialization -functions for the chosen plugins are called with `(parser, -configValue)` arguments. They are expected to use the `parser.extend` -method to extend parser methods. For example, the `readToken` method -could be extended like this: - -```javascript -parser.extend("readToken", function(nextMethod) { - return function(code) { - console.log("Reading a token!") - return nextMethod.call(this, code) - } -}) -``` - -The `nextMethod` argument passed to `extend`'s second argument is the -previous value of this method, and should usually be called through to -whenever the extended method does not handle the call itself. - -Similarly, the loose parser allows plugins to register themselves via -`acorn.pluginsLoose`. The extension mechanism is the same as for the -normal parser: - -```javascript -looseParser.extend("readToken", function(nextMethod) { - return function() { - console.log("Reading a token in the loose parser!") - return nextMethod.call(this) - } -}) -``` - -### Existing plugins +## Existing plugins - [`acorn-jsx`](https://github.com/RReverser/acorn-jsx): Parse [Facebook JSX syntax extensions](https://github.com/facebook/jsx) - - [`acorn-objj`](https://github.com/cappuccino/acorn-objj): [Objective-J](http://www.cappuccino-project.org/learn/objective-j.html) language parser built as Acorn plugin - Plugins for ECMAScript proposals: +Plugins for ECMAScript proposals: - [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling: - [`acorn-async-iteration`](https://github.com/acornjs/acorn-async-iteration): Parse [async iteration proposal](https://github.com/tc39/proposal-async-iteration) @@ -459,9 +266,4 @@ looseParser.extend("readToken", function(nextMethod) { - [`acorn-dynamic-import`](https://github.com/kesne/acorn-dynamic-import): Parse [import() proposal](https://github.com/tc39/proposal-dynamic-import) - [`acorn-import-meta`](https://github.com/acornjs/acorn-import-meta): Parse [import.meta proposal](https://github.com/tc39/proposal-import-meta) - [`acorn-numeric-separator`](https://github.com/acornjs/acorn-numeric-separator): Parse [numeric separator proposal](https://github.com/tc39/proposal-numeric-separator) - - [`acorn-optional-catch-binding`](https://github.com/acornjs/acorn-optional-catch-binding): Parse [optional catch binding proposal](https://github.com/tc39/proposal-optional-catch-binding) - - [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods) - - [`acorn5-object-spread`](https://github.com/adrianheine/acorn5-object-spread): Parse [Object Rest/Spread Properties proposal](https://github.com/tc39/proposal-object-rest-spread) - - [`acorn-object-rest-spread`](https://github.com/victor-homyakov/acorn-object-rest-spread): Parse [Object Rest/Spread Properties proposal](https://github.com/tc39/proposal-object-rest-spread) - - [`acorn-es7`](https://github.com/angelozerr/acorn-es7): Parse [decorator syntax proposal](https://github.com/wycats/javascript-decorators) - - [`acorn-static-class-property-initializer`](https://github.com/victor-homyakov/acorn-static-class-property-initializer): Partial support for static class properties from [ES Class Fields & Static Properties Proposal](https://github.com/tc39/proposal-class-public-fields) to support static property initializers in [React components written as ES6+ classes](https://babeljs.io/blog/2015/07/07/react-on-es6-plus) + - [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods)n diff --git a/tools/node_modules/eslint/node_modules/acorn/bin/acorn b/tools/node_modules/eslint/node_modules/acorn/bin/acorn index 03888d0aecac17..cf7df46890fdd4 100755 --- a/tools/node_modules/eslint/node_modules/acorn/bin/acorn +++ b/tools/node_modules/eslint/node_modules/acorn/bin/acorn @@ -1,4 +1,4 @@ #!/usr/bin/env node 'use strict'; -require('./_acorn.js'); +require('../dist/bin.js'); diff --git a/tools/node_modules/eslint/node_modules/acorn/bin/run_test262.js b/tools/node_modules/eslint/node_modules/acorn/bin/run_test262.js deleted file mode 100644 index 150429a1f20957..00000000000000 --- a/tools/node_modules/eslint/node_modules/acorn/bin/run_test262.js +++ /dev/null @@ -1,21 +0,0 @@ -const fs = require("fs") -const path = require("path") -const run = require("test262-parser-runner") -const parse = require("..").parse - -const unsupportedFeatures = [ - "BigInt", - "class-fields", - "class-fields-private", - "class-fields-public", - "numeric-separator-literal" -]; - -run( - (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 10}), - { - testsDirectory: path.dirname(require.resolve("test262/package.json")), - skip: test => (test.attrs.features && unsupportedFeatures.some(f => test.attrs.features.includes(f))), - whitelist: fs.readFileSync("./bin/test262.whitelist", "utf8").split("\n").filter(v => v) - } -) diff --git a/tools/node_modules/eslint/node_modules/acorn/bin/test262.whitelist b/tools/node_modules/eslint/node_modules/acorn/bin/test262.whitelist deleted file mode 100644 index c8c6ce4a82774b..00000000000000 --- a/tools/node_modules/eslint/node_modules/acorn/bin/test262.whitelist +++ /dev/null @@ -1,404 +0,0 @@ -annexB/language/function-code/block-decl-func-no-skip-try.js (default) -annexB/language/function-code/block-decl-func-skip-early-err-block.js (default) -annexB/language/function-code/block-decl-func-skip-early-err.js (default) -annexB/language/function-code/block-decl-func-skip-early-err-switch.js (default) -annexB/language/function-code/block-decl-func-skip-early-err-try.js (default) -annexB/language/function-code/if-decl-else-decl-a-func-no-skip-try.js (default) -annexB/language/function-code/if-decl-else-decl-a-func-skip-early-err-block.js (default) -annexB/language/function-code/if-decl-else-decl-a-func-skip-early-err.js (default) -annexB/language/function-code/if-decl-else-decl-a-func-skip-early-err-switch.js (default) -annexB/language/function-code/if-decl-else-decl-a-func-skip-early-err-try.js (default) -annexB/language/function-code/if-decl-else-decl-b-func-no-skip-try.js (default) -annexB/language/function-code/if-decl-else-decl-b-func-skip-early-err-block.js (default) -annexB/language/function-code/if-decl-else-decl-b-func-skip-early-err.js (default) -annexB/language/function-code/if-decl-else-decl-b-func-skip-early-err-switch.js (default) -annexB/language/function-code/if-decl-else-decl-b-func-skip-early-err-try.js (default) -annexB/language/function-code/if-decl-else-stmt-func-no-skip-try.js (default) -annexB/language/function-code/if-decl-else-stmt-func-skip-early-err-block.js (default) -annexB/language/function-code/if-decl-else-stmt-func-skip-early-err.js (default) -annexB/language/function-code/if-decl-else-stmt-func-skip-early-err-switch.js (default) -annexB/language/function-code/if-decl-else-stmt-func-skip-early-err-try.js (default) -annexB/language/function-code/if-decl-no-else-func-no-skip-try.js (default) -annexB/language/function-code/if-decl-no-else-func-skip-early-err-block.js (default) -annexB/language/function-code/if-decl-no-else-func-skip-early-err.js (default) -annexB/language/function-code/if-decl-no-else-func-skip-early-err-switch.js (default) -annexB/language/function-code/if-decl-no-else-func-skip-early-err-try.js (default) -annexB/language/function-code/if-stmt-else-decl-func-no-skip-try.js (default) -annexB/language/function-code/if-stmt-else-decl-func-skip-early-err-block.js (default) -annexB/language/function-code/if-stmt-else-decl-func-skip-early-err.js (default) -annexB/language/function-code/if-stmt-else-decl-func-skip-early-err-switch.js (default) -annexB/language/function-code/if-stmt-else-decl-func-skip-early-err-try.js (default) -annexB/language/function-code/switch-case-func-no-skip-try.js (default) -annexB/language/function-code/switch-case-func-skip-early-err-block.js (default) -annexB/language/function-code/switch-case-func-skip-early-err.js (default) -annexB/language/function-code/switch-case-func-skip-early-err-switch.js (default) -annexB/language/function-code/switch-case-func-skip-early-err-try.js (default) -annexB/language/function-code/switch-dflt-func-no-skip-try.js (default) -annexB/language/function-code/switch-dflt-func-skip-early-err-block.js (default) -annexB/language/function-code/switch-dflt-func-skip-early-err.js (default) -annexB/language/function-code/switch-dflt-func-skip-early-err-switch.js (default) -annexB/language/function-code/switch-dflt-func-skip-early-err-try.js (default) -annexB/language/global-code/block-decl-global-no-skip-try.js (default) -annexB/language/global-code/block-decl-global-skip-early-err-block.js (default) -annexB/language/global-code/block-decl-global-skip-early-err.js (default) -annexB/language/global-code/block-decl-global-skip-early-err-switch.js (default) -annexB/language/global-code/block-decl-global-skip-early-err-try.js (default) -annexB/language/global-code/if-decl-else-decl-a-global-no-skip-try.js (default) -annexB/language/global-code/if-decl-else-decl-a-global-skip-early-err-block.js (default) -annexB/language/global-code/if-decl-else-decl-a-global-skip-early-err.js (default) -annexB/language/global-code/if-decl-else-decl-a-global-skip-early-err-switch.js (default) -annexB/language/global-code/if-decl-else-decl-a-global-skip-early-err-try.js (default) -annexB/language/global-code/if-decl-else-decl-b-global-no-skip-try.js (default) -annexB/language/global-code/if-decl-else-decl-b-global-skip-early-err-block.js (default) -annexB/language/global-code/if-decl-else-decl-b-global-skip-early-err.js (default) -annexB/language/global-code/if-decl-else-decl-b-global-skip-early-err-switch.js (default) -annexB/language/global-code/if-decl-else-decl-b-global-skip-early-err-try.js (default) -annexB/language/global-code/if-decl-else-stmt-global-no-skip-try.js (default) -annexB/language/global-code/if-decl-else-stmt-global-skip-early-err-block.js (default) -annexB/language/global-code/if-decl-else-stmt-global-skip-early-err.js (default) -annexB/language/global-code/if-decl-else-stmt-global-skip-early-err-switch.js (default) -annexB/language/global-code/if-decl-else-stmt-global-skip-early-err-try.js (default) -annexB/language/global-code/if-decl-no-else-global-no-skip-try.js (default) -annexB/language/global-code/if-decl-no-else-global-skip-early-err-block.js (default) -annexB/language/global-code/if-decl-no-else-global-skip-early-err.js (default) -annexB/language/global-code/if-decl-no-else-global-skip-early-err-switch.js (default) -annexB/language/global-code/if-decl-no-else-global-skip-early-err-try.js (default) -annexB/language/global-code/if-stmt-else-decl-global-no-skip-try.js (default) -annexB/language/global-code/if-stmt-else-decl-global-skip-early-err-block.js (default) -annexB/language/global-code/if-stmt-else-decl-global-skip-early-err.js (default) -annexB/language/global-code/if-stmt-else-decl-global-skip-early-err-switch.js (default) -annexB/language/global-code/if-stmt-else-decl-global-skip-early-err-try.js (default) -annexB/language/global-code/switch-case-global-no-skip-try.js (default) -annexB/language/global-code/switch-case-global-skip-early-err-block.js (default) -annexB/language/global-code/switch-case-global-skip-early-err.js (default) -annexB/language/global-code/switch-case-global-skip-early-err-switch.js (default) -annexB/language/global-code/switch-case-global-skip-early-err-try.js (default) -annexB/language/global-code/switch-dflt-global-no-skip-try.js (default) -annexB/language/global-code/switch-dflt-global-skip-early-err-block.js (default) -annexB/language/global-code/switch-dflt-global-skip-early-err.js (default) -annexB/language/global-code/switch-dflt-global-skip-early-err-switch.js (default) -annexB/language/global-code/switch-dflt-global-skip-early-err-try.js (default) -annexB/language/statements/try/catch-redeclared-for-in-var.js (default) -annexB/language/statements/try/catch-redeclared-for-in-var.js (strict mode) -annexB/language/statements/try/catch-redeclared-for-var.js (default) -annexB/language/statements/try/catch-redeclared-for-var.js (strict mode) -annexB/language/statements/try/catch-redeclared-var-statement-captured.js (default) -annexB/language/statements/try/catch-redeclared-var-statement-captured.js (strict mode) -annexB/language/statements/try/catch-redeclared-var-statement.js (default) -annexB/language/statements/try/catch-redeclared-var-statement.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/block-scope/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-const-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-const-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-let-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-let-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/block-scope/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/const-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/const-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/block-scope/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/block-scope/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/block-scope/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/expressions/async-arrow-function/early-errors-arrow-await-in-formals-default.js (default) -language/expressions/async-arrow-function/early-errors-arrow-await-in-formals-default.js (strict mode) -language/expressions/async-arrow-function/early-errors-arrow-body-contains-super-call.js (default) -language/expressions/async-arrow-function/early-errors-arrow-body-contains-super-call.js (strict mode) -language/expressions/async-arrow-function/early-errors-arrow-body-contains-super-property.js (default) -language/expressions/async-arrow-function/early-errors-arrow-body-contains-super-property.js (strict mode) -language/expressions/async-function/early-errors-expression-body-contains-super-call.js (default) -language/expressions/async-function/early-errors-expression-body-contains-super-call.js (strict mode) -language/expressions/async-function/early-errors-expression-body-contains-super-property.js (default) -language/expressions/async-function/early-errors-expression-body-contains-super-property.js (strict mode) -language/expressions/async-function/early-errors-expression-formals-contains-super-call.js (default) -language/expressions/async-function/early-errors-expression-formals-contains-super-call.js (strict mode) -language/expressions/async-function/early-errors-expression-formals-contains-super-property.js (default) -language/expressions/async-function/early-errors-expression-formals-contains-super-property.js (strict mode) -language/expressions/class/method-param-dflt-yield.js (default) -language/expressions/class/static-method-param-dflt-yield.js (default) -language/expressions/function/early-body-super-call.js (default) -language/expressions/function/early-body-super-call.js (strict mode) -language/expressions/function/early-body-super-prop.js (default) -language/expressions/function/early-body-super-prop.js (strict mode) -language/expressions/function/early-params-super-call.js (default) -language/expressions/function/early-params-super-call.js (strict mode) -language/expressions/function/early-params-super-prop.js (default) -language/expressions/function/early-params-super-prop.js (strict mode) -language/expressions/object/method-definition/early-errors-object-method-body-contains-super-call.js (default) -language/expressions/object/method-definition/early-errors-object-method-body-contains-super-call.js (strict mode) -language/expressions/object/method-definition/early-errors-object-method-duplicate-parameters.js (default) -language/expressions/object/method-definition/early-errors-object-method-formals-contains-super-call.js (default) -language/expressions/object/method-definition/early-errors-object-method-formals-contains-super-call.js (strict mode) -language/expressions/object/method-definition/generator-super-call-body.js (default) -language/expressions/object/method-definition/generator-super-call-body.js (strict mode) -language/expressions/object/method-definition/generator-super-call-param.js (default) -language/expressions/object/method-definition/generator-super-call-param.js (strict mode) -language/expressions/object/prop-def-invalid-async-prefix.js (default) -language/expressions/object/prop-def-invalid-async-prefix.js (strict mode) -language/expressions/yield/in-iteration-stmt.js (default) -language/expressions/yield/in-iteration-stmt.js (strict mode) -language/expressions/yield/star-in-iteration-stmt.js (default) -language/expressions/yield/star-in-iteration-stmt.js (strict mode) -language/global-code/new.target-arrow.js (default) -language/global-code/new.target-arrow.js (strict mode) -language/global-code/super-call-arrow.js (default) -language/global-code/super-call-arrow.js (strict mode) -language/global-code/super-prop-arrow.js (default) -language/global-code/super-prop-arrow.js (strict mode) -language/module-code/early-export-global.js (default) -language/module-code/early-export-global.js (strict mode) -language/module-code/early-export-unresolvable.js (default) -language/module-code/early-export-unresolvable.js (strict mode) -language/statements/async-function/early-errors-declaration-body-contains-super-call.js (default) -language/statements/async-function/early-errors-declaration-body-contains-super-call.js (strict mode) -language/statements/async-function/early-errors-declaration-body-contains-super-property.js (default) -language/statements/async-function/early-errors-declaration-body-contains-super-property.js (strict mode) -language/statements/async-function/early-errors-declaration-formals-contains-super-call.js (default) -language/statements/async-function/early-errors-declaration-formals-contains-super-call.js (strict mode) -language/statements/async-function/early-errors-declaration-formals-contains-super-property.js (default) -language/statements/async-function/early-errors-declaration-formals-contains-super-property.js (strict mode) -language/expressions/async-generator/early-errors-expression-body-contains-super-call.js (default) -language/expressions/async-generator/early-errors-expression-body-contains-super-call.js (strict mode) -language/expressions/async-generator/early-errors-expression-body-contains-super-property.js (default) -language/expressions/async-generator/early-errors-expression-body-contains-super-property.js (strict mode) -language/expressions/async-generator/early-errors-expression-formals-contains-super-call.js (default) -language/expressions/async-generator/early-errors-expression-formals-contains-super-call.js (strict mode) -language/expressions/async-generator/early-errors-expression-formals-contains-super-property.js (default) -language/expressions/async-generator/early-errors-expression-formals-contains-super-property.js (strict mode) -language/statements/class/definition/early-errors-class-method-arguments-in-formal-parameters.js (default) -language/statements/class/definition/early-errors-class-method-body-contains-super-call.js (default) -language/statements/class/definition/early-errors-class-method-body-contains-super-call.js (strict mode) -language/statements/class/definition/early-errors-class-method-duplicate-parameters.js (default) -language/statements/class/definition/early-errors-class-method-eval-in-formal-parameters.js (default) -language/statements/class/definition/early-errors-class-method-formals-contains-super-call.js (default) -language/statements/class/definition/early-errors-class-method-formals-contains-super-call.js (strict mode) -language/statements/class/definition/methods-gen-yield-as-function-expression-binding-identifier.js (default) -language/statements/class/definition/methods-gen-yield-as-identifier-in-nested-function.js (default) -language/statements/class/method-param-yield.js (default) -language/statements/class/static-method-param-yield.js (default) -language/statements/class/strict-mode/with.js (default) -language/statements/class/syntax/early-errors/class-body-has-direct-super-missing-class-heritage.js (default) -language/statements/class/syntax/early-errors/class-body-has-direct-super-missing-class-heritage.js (strict mode) -language/statements/class/syntax/early-errors/class-body-method-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-method-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-special-method-generator-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-special-method-generator-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-special-method-get-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-special-method-get-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-special-method-set-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-special-method-set-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-static-method-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-static-method-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-static-method-get-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-static-method-get-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-body-static-method-set-contains-direct-super.js (default) -language/statements/class/syntax/early-errors/class-body-static-method-set-contains-direct-super.js (strict mode) -language/statements/class/syntax/early-errors/class-definition-evaluation-block-duplicate-binding.js (default) -language/statements/class/syntax/early-errors/class-definition-evaluation-block-duplicate-binding.js (strict mode) -language/statements/class/syntax/early-errors/class-definition-evaluation-scriptbody-duplicate-binding.js (default) -language/statements/class/syntax/early-errors/class-definition-evaluation-scriptbody-duplicate-binding.js (strict mode) -language/statements/const/syntax/const-declaring-let-split-across-two-lines.js (default) -language/statements/do-while/labelled-fn-stmt.js (default) -language/statements/for/head-let-bound-names-in-stmt.js (default) -language/statements/for/head-let-bound-names-in-stmt.js (strict mode) -language/statements/for-in/head-const-bound-names-in-stmt.js (default) -language/statements/for-in/head-const-bound-names-in-stmt.js (strict mode) -language/statements/for-in/head-const-bound-names-let.js (default) -language/statements/for-in/head-let-bound-names-in-stmt.js (default) -language/statements/for-in/head-let-bound-names-in-stmt.js (strict mode) -language/statements/for-in/head-let-bound-names-let.js (default) -language/statements/for-in/labelled-fn-stmt-const.js (default) -language/statements/for-in/labelled-fn-stmt-let.js (default) -language/statements/for-in/labelled-fn-stmt-lhs.js (default) -language/statements/for-in/labelled-fn-stmt-var.js (default) -language/statements/for-in/let-block-with-newline.js (default) -language/statements/for-in/let-identifier-with-newline.js (default) -language/statements/for/labelled-fn-stmt-expr.js (default) -language/statements/for/labelled-fn-stmt-let.js (default) -language/statements/for/labelled-fn-stmt-var.js (default) -language/statements/for/let-block-with-newline.js (default) -language/statements/for/let-identifier-with-newline.js (default) -language/statements/for-of/head-const-bound-names-in-stmt.js (default) -language/statements/for-of/head-const-bound-names-in-stmt.js (strict mode) -language/statements/for-of/head-const-bound-names-let.js (default) -language/statements/for-of/head-let-bound-names-in-stmt.js (default) -language/statements/for-of/head-let-bound-names-in-stmt.js (strict mode) -language/statements/for-of/head-let-bound-names-let.js (default) -language/statements/for-of/labelled-fn-stmt-const.js (default) -language/statements/for-of/labelled-fn-stmt-let.js (default) -language/statements/for-of/labelled-fn-stmt-lhs.js (default) -language/statements/for-of/labelled-fn-stmt-var.js (default) -language/statements/for-of/let-block-with-newline.js (default) -language/statements/for-of/let-identifier-with-newline.js (default) -language/statements/for-await-of/let-block-with-newline.js (default) -language/statements/for-await-of/let-identifier-with-newline.js (default) -language/statements/function/early-body-super-call.js (default) -language/statements/function/early-body-super-call.js (strict mode) -language/statements/function/early-body-super-prop.js (default) -language/statements/function/early-body-super-prop.js (strict mode) -language/statements/function/early-params-super-call.js (default) -language/statements/function/early-params-super-call.js (strict mode) -language/statements/function/early-params-super-prop.js (default) -language/statements/function/early-params-super-prop.js (strict mode) -language/statements/if/if-gen-else-gen.js (default) -language/statements/if/if-gen-else-stmt.js (default) -language/statements/if/if-gen-no-else.js (default) -language/statements/if/if-stmt-else-gen.js (default) -language/statements/if/labelled-fn-stmt-first.js (default) -language/statements/if/labelled-fn-stmt-lone.js (default) -language/statements/if/labelled-fn-stmt-second.js (default) -language/statements/if/let-block-with-newline.js (default) -language/statements/if/let-identifier-with-newline.js (default) -language/statements/labeled/let-block-with-newline.js (default) -language/statements/labeled/let-identifier-with-newline.js (default) -language/statements/let/syntax/identifier-let-disallowed-as-boundname.js (default) -language/statements/let/syntax/let-let-declaration-split-across-two-lines.js (default) -language/statements/let/syntax/let-let-declaration-with-initializer-split-across-two-lines.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/statements/switch/syntax/redeclaration/async-generator-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-const-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-const-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-let-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-let-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/statements/switch/syntax/redeclaration/class-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/const-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/const-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/statements/switch/syntax/redeclaration/function-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (default) -language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (default) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (default) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js (strict mode) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (default) -language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js (strict mode) -language/statements/while/labelled-fn-stmt.js (default) -language/statements/while/let-block-with-newline.js (default) -language/statements/while/let-identifier-with-newline.js (default) -language/statements/with/labelled-fn-stmt.js (default) -language/statements/with/let-block-with-newline.js (default) -language/statements/with/let-identifier-with-newline.js (default) -language/white-space/mongolian-vowel-separator.js (default) -language/white-space/mongolian-vowel-separator.js (strict mode) diff --git a/tools/node_modules/eslint/node_modules/acorn/dist/.keep b/tools/node_modules/eslint/node_modules/acorn/dist/.keep deleted file mode 100644 index e69de29bb2d1d6..00000000000000 diff --git a/tools/node_modules/eslint/node_modules/acorn/dist/acorn.d.ts b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.d.ts new file mode 100644 index 00000000000000..1c8d927d6ecc8c --- /dev/null +++ b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.d.ts @@ -0,0 +1,208 @@ +export as namespace acorn +export = acorn + +declare namespace acorn { + function parse(input: string, options?: Options): Node + + function parseExpressionAt(input: string, pos?: number, options?: Options): Node + + function tokenizer(input: string, options?: Options): { + getToken(): Token + [Symbol.iterator](): Iterator + } + + interface Options { + ecmaVersion?: 3 | 5 | 6 | 7 | 8 | 9 | 10 | 2015 | 2016 | 2017 | 2018 | 2019 + sourceType?: 'script' | 'module' + onInsertedSemicolon?: (lastTokEnd: number, lastTokEndLoc?: Position) => void + onTrailingComma?: (lastTokEnd: number, lastTokEndLoc?: Position) => void + allowReserved?: boolean + allowReturnOutsideFunction?: boolean + allowImportExportEverywhere?: boolean + allowHashBang?: boolean + locations?: boolean + onToken?: ((token: Token) => any) | Token[] + onComment?: (( + isBlock: boolean, text: string, start: number, end: number, startLoc?: Position, + endLoc?: Position + ) => void) | Comment[] + ranges?: boolean + program?: Node + sourceFile?: string + directSourceFile?: string + preserveParens?: boolean + } + + class Parser { + constructor(options: Options, input: string, startPos?: number) + parse(): Node + static parse(input: string, options?: Options): Node + static parseExpressionAt(input: string, pos: number, options?: Options): Node + static tokenizer(input: string, options?: Options): { + getToken(): Token + [Symbol.iterator](): Iterator + } + static extend(...plugins: (typeof Parser)[]): typeof Parser + } + + interface Position { line: number; column: number; offset: number } + + const defaultOptions: Options + + function getLineInfo(input: string, offset: number): Position + + class SourceLocation { + start: Position + end: Position + source?: string | null + constructor(p: Parser, start: Position, end: Position) + } + + class Node { + type: string + start: number + end: number + loc?: SourceLocation + sourceFile?: string + range?: [number, number] + constructor(parser: Parser, pos: number, loc?: SourceLocation) + } + + class TokenType { + label: string + keyword: string + beforeExpr: boolean + startsExpr: boolean + isLoop: boolean + isAssign: boolean + prefix: boolean + postfix: boolean + binop: number + updateContext?: (prevType: TokenType) => void + constructor(label: string, conf?: any) + } + + const tokTypes: { + num: TokenType + regexp: TokenType + string: TokenType + name: TokenType + eof: TokenType + bracketL: TokenType + bracketR: TokenType + braceL: TokenType + braceR: TokenType + parenL: TokenType + parenR: TokenType + comma: TokenType + semi: TokenType + colon: TokenType + dot: TokenType + question: TokenType + arrow: TokenType + template: TokenType + ellipsis: TokenType + backQuote: TokenType + dollarBraceL: TokenType + eq: TokenType + assign: TokenType + incDec: TokenType + prefix: TokenType + logicalOR: TokenType + logicalAND: TokenType + bitwiseOR: TokenType + bitwiseXOR: TokenType + bitwiseAND: TokenType + equality: TokenType + relational: TokenType + bitShift: TokenType + plusMin: TokenType + modulo: TokenType + star: TokenType + slash: TokenType + starstar: TokenType + _break: TokenType + _case: TokenType + _catch: TokenType + _continue: TokenType + _debugger: TokenType + _default: TokenType + _do: TokenType + _else: TokenType + _finally: TokenType + _for: TokenType + _function: TokenType + _if: TokenType + _return: TokenType + _switch: TokenType + _throw: TokenType + _try: TokenType + _var: TokenType + _const: TokenType + _while: TokenType + _with: TokenType + _new: TokenType + _this: TokenType + _super: TokenType + _class: TokenType + _extends: TokenType + _export: TokenType + _import: TokenType + _null: TokenType + _true: TokenType + _false: TokenType + _in: TokenType + _instanceof: TokenType + _typeof: TokenType + _void: TokenType + _delete: TokenType + } + + class TokContext { + constructor(token: string, isExpr: boolean, preserveSpace: boolean, override?: (p: Parser) => void) + } + + const tokContexts: { + b_stat: TokContext + b_expr: TokContext + b_tmpl: TokContext + p_stat: TokContext + p_expr: TokContext + q_tmpl: TokContext + f_expr: TokContext + } + + function isIdentifierStart(code: number, astral?: boolean): boolean + + function isIdentifierChar(code: number, astral?: boolean): boolean + + interface AbstractToken { + } + + interface Comment extends AbstractToken { + type: string + value: string + start: number + end: number + loc?: SourceLocation + range?: [number, number] + } + + class Token { + type: TokenType + value: any + start: number + end: number + loc?: SourceLocation + range?: [number, number] + constructor(p: Parser) + } + + function isNewLine(code: number): boolean + + const lineBreak: RegExp + + const lineBreakG: RegExp + + const version: string +} diff --git a/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js index dada6a37a56339..922ff0c9fc9c1b 100644 --- a/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js +++ b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js @@ -313,11 +313,12 @@ function getLineInfo(input, offset) { // the parser process. These options are recognized: var defaultOptions = { - // `ecmaVersion` indicates the ECMAScript version to parse. Must - // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support - // for strict mode, the set of reserved words, and support for - // new syntax features. The default is 7. - ecmaVersion: 7, + // `ecmaVersion` indicates the ECMAScript version to parse. Must be + // either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), or 10 + // (2019). This influences support for strict mode, the set of + // reserved words, and support for new syntax features. The default + // is 9. + ecmaVersion: 9, // `sourceType` indicates the mode the code should be parsed in. // Can be either `"script"` or `"module"`. This influences global // strict mode and parsing of `import` and `export` declarations. @@ -393,8 +394,7 @@ var defaultOptions = { directSourceFile: null, // When enabled, parenthesized expressions are represented by // (non-standard) ParenthesizedExpression nodes - preserveParens: false, - plugins: {} + preserveParens: false }; // Interpret and default an options object @@ -437,8 +437,26 @@ function pushComment(options, array) { } } -// Registered plugins -var plugins = {}; +// Each scope gets a bitset that may contain these flags +var SCOPE_TOP = 1; +var SCOPE_FUNCTION = 2; +var SCOPE_VAR = SCOPE_TOP | SCOPE_FUNCTION; +var SCOPE_ASYNC = 4; +var SCOPE_GENERATOR = 8; +var SCOPE_ARROW = 16; +var SCOPE_SIMPLE_CATCH = 32; + +function functionFlags(async, generator) { + return SCOPE_FUNCTION | (async ? SCOPE_ASYNC : 0) | (generator ? SCOPE_GENERATOR : 0) +} + +// Used in checkLVal and declareName to determine the type of a binding +var BIND_NONE = 0; +var BIND_VAR = 1; +var BIND_LEXICAL = 2; +var BIND_FUNCTION = 3; +var BIND_SIMPLE_CATCH = 4; +var BIND_OUTSIDE = 5; // Special case for function names as bound inside the function function keywordRegexp(words) { return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$") @@ -465,9 +483,6 @@ var Parser = function Parser(options, input, startPos) { // escape sequences must not be interpreted as keywords. this.containsEsc = false; - // Load plugins - this.loadPlugins(options.plugins); - // Set up token state // The current position of the tokenizer in the input. @@ -508,8 +523,6 @@ var Parser = function Parser(options, input, startPos) { // Used to signify the start of a potential arrow function this.potentialArrowAt = -1; - // Flags to track whether we are in a function, a generator, an async function. - this.inFunction = this.inGenerator = this.inAsync = false; // Positions to delayed-check that yield/await does not exist in default parameters. this.yieldPos = this.awaitPos = 0; // Labels in scope. @@ -521,36 +534,49 @@ var Parser = function Parser(options, input, startPos) { // Scope tracking for duplicate variable names (see scope.js) this.scopeStack = []; - this.enterFunctionScope(); + this.enterScope(SCOPE_TOP); // For RegExp validation this.regexpState = null; }; -// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them -Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) }; -Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) }; +var prototypeAccessors = { inFunction: { configurable: true },inGenerator: { configurable: true },inAsync: { configurable: true } }; -Parser.prototype.extend = function extend (name, f) { - this[name] = f(this[name]); +Parser.prototype.parse = function parse () { + var node = this.options.program || this.startNode(); + this.nextToken(); + return this.parseTopLevel(node) }; -Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { - var this$1 = this; +prototypeAccessors.inFunction.get = function () { return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0 }; +prototypeAccessors.inGenerator.get = function () { return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0 }; +prototypeAccessors.inAsync.get = function () { return (this.currentVarScope().flags & SCOPE_ASYNC) > 0 }; - for (var name in pluginConfigs) { - var plugin = plugins[name]; - if (!plugin) { throw new Error("Plugin '" + name + "' not found") } - plugin(this$1, pluginConfigs[name]); - } +Parser.extend = function extend () { + var plugins = [], len = arguments.length; + while ( len-- ) plugins[ len ] = arguments[ len ]; + + var cls = this; + for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); } + return cls }; -Parser.prototype.parse = function parse () { - var node = this.options.program || this.startNode(); - this.nextToken(); - return this.parseTopLevel(node) +Parser.parse = function parse (input, options) { + return new this(options, input).parse() +}; + +Parser.parseExpressionAt = function parseExpressionAt (input, pos, options) { + var parser = new this(options, input, pos); + parser.nextToken(); + return parser.parseExpression() }; +Parser.tokenizer = function tokenizer (input, options) { + return new this(options, input) +}; + +Object.defineProperties( Parser.prototype, prototypeAccessors ); + var pp = Parser.prototype; // ## Parser utilities @@ -703,7 +729,7 @@ pp$1.parseTopLevel = function(node) { var exports = {}; if (!node.body) { node.body = []; } while (this.type !== types.eof) { - var stmt = this$1.parseStatement(true, true, exports); + var stmt = this$1.parseStatement(null, true, exports); node.body.push(stmt); } this.adaptDirectivePrologue(node.body); @@ -754,7 +780,7 @@ pp$1.isAsyncFunction = function() { // `if (foo) /blah/.exec(foo)`, where looking at the previous token // does not help. -pp$1.parseStatement = function(declaration, topLevel, exports) { +pp$1.parseStatement = function(context, topLevel, exports) { var starttype = this.type, node = this.startNode(), kind; if (this.isLet()) { @@ -772,10 +798,10 @@ pp$1.parseStatement = function(declaration, topLevel, exports) { case types._do: return this.parseDoStatement(node) case types._for: return this.parseForStatement(node) case types._function: - if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); } - return this.parseFunctionStatement(node, false) + if ((context && (this.strict || context !== "if")) && this.options.ecmaVersion >= 6) { this.unexpected(); } + return this.parseFunctionStatement(node, false, !context) case types._class: - if (!declaration) { this.unexpected(); } + if (context) { this.unexpected(); } return this.parseClass(node, true) case types._if: return this.parseIfStatement(node) case types._return: return this.parseReturnStatement(node) @@ -784,11 +810,11 @@ pp$1.parseStatement = function(declaration, topLevel, exports) { case types._try: return this.parseTryStatement(node) case types._const: case types._var: kind = kind || this.value; - if (!declaration && kind !== "var") { this.unexpected(); } + if (context && kind !== "var") { this.unexpected(); } return this.parseVarStatement(node, kind) case types._while: return this.parseWhileStatement(node) case types._with: return this.parseWithStatement(node) - case types.braceL: return this.parseBlock() + case types.braceL: return this.parseBlock(true, node) case types.semi: return this.parseEmptyStatement(node) case types._export: case types._import: @@ -807,14 +833,14 @@ pp$1.parseStatement = function(declaration, topLevel, exports) { // Identifier node, we switch to interpreting it as a label. default: if (this.isAsyncFunction()) { - if (!declaration) { this.unexpected(); } + if (context) { this.unexpected(); } this.next(); - return this.parseFunctionStatement(node, true) + return this.parseFunctionStatement(node, true, !context) } var maybeName = this.value, expr = this.parseExpression(); if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) - { return this.parseLabeledStatement(node, maybeName, expr) } + { return this.parseLabeledStatement(node, maybeName, expr, context) } else { return this.parseExpressionStatement(node, expr) } } }; @@ -854,7 +880,7 @@ pp$1.parseDebuggerStatement = function(node) { pp$1.parseDoStatement = function(node) { this.next(); this.labels.push(loopLabel); - node.body = this.parseStatement(false); + node.body = this.parseStatement("do"); this.labels.pop(); this.expect(types._while); node.test = this.parseParenExpression(); @@ -877,7 +903,7 @@ pp$1.parseForStatement = function(node) { this.next(); var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1; this.labels.push(loopLabel); - this.enterLexicalScope(); + this.enterScope(0); this.expect(types.parenL); if (this.type === types.semi) { if (awaitAt > -1) { this.unexpected(awaitAt); } @@ -919,17 +945,17 @@ pp$1.parseForStatement = function(node) { return this.parseFor(node, init) }; -pp$1.parseFunctionStatement = function(node, isAsync) { +pp$1.parseFunctionStatement = function(node, isAsync, declarationPosition) { this.next(); - return this.parseFunction(node, true, false, isAsync) + return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), false, isAsync) }; pp$1.parseIfStatement = function(node) { this.next(); node.test = this.parseParenExpression(); // allow function declarations in branches, but only in non-strict mode - node.consequent = this.parseStatement(!this.strict && this.type === types._function); - node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.type === types._function) : null; + node.consequent = this.parseStatement("if"); + node.alternate = this.eat(types._else) ? this.parseStatement("if") : null; return this.finishNode(node, "IfStatement") }; @@ -955,7 +981,7 @@ pp$1.parseSwitchStatement = function(node) { node.cases = []; this.expect(types.braceL); this.labels.push(switchLabel); - this.enterLexicalScope(); + this.enterScope(0); // Statements under must be grouped (by label) in SwitchCase // nodes. `cur` is used to keep the node that we are currently @@ -979,10 +1005,10 @@ pp$1.parseSwitchStatement = function(node) { this$1.expect(types.colon); } else { if (!cur) { this$1.unexpected(); } - cur.consequent.push(this$1.parseStatement(true)); + cur.consequent.push(this$1.parseStatement(null)); } } - this.exitLexicalScope(); + this.exitScope(); if (cur) { this.finishNode(cur, "SwitchCase"); } this.next(); // Closing brace this.labels.pop(); @@ -1011,16 +1037,17 @@ pp$1.parseTryStatement = function(node) { this.next(); if (this.eat(types.parenL)) { clause.param = this.parseBindingAtom(); - this.enterLexicalScope(); - this.checkLVal(clause.param, "let"); + var simple = clause.param.type === "Identifier"; + this.enterScope(simple ? SCOPE_SIMPLE_CATCH : 0); + this.checkLVal(clause.param, simple ? BIND_SIMPLE_CATCH : BIND_LEXICAL); this.expect(types.parenR); } else { if (this.options.ecmaVersion < 10) { this.unexpected(); } clause.param = null; - this.enterLexicalScope(); + this.enterScope(0); } clause.body = this.parseBlock(false); - this.exitLexicalScope(); + this.exitScope(); node.handler = this.finishNode(clause, "CatchClause"); } node.finalizer = this.eat(types._finally) ? this.parseBlock() : null; @@ -1040,7 +1067,7 @@ pp$1.parseWhileStatement = function(node) { this.next(); node.test = this.parseParenExpression(); this.labels.push(loopLabel); - node.body = this.parseStatement(false); + node.body = this.parseStatement("while"); this.labels.pop(); return this.finishNode(node, "WhileStatement") }; @@ -1049,7 +1076,7 @@ pp$1.parseWithStatement = function(node) { if (this.strict) { this.raise(this.start, "'with' in strict mode"); } this.next(); node.object = this.parseParenExpression(); - node.body = this.parseStatement(false); + node.body = this.parseStatement("with"); return this.finishNode(node, "WithStatement") }; @@ -1058,7 +1085,7 @@ pp$1.parseEmptyStatement = function(node) { return this.finishNode(node, "EmptyStatement") }; -pp$1.parseLabeledStatement = function(node, maybeName, expr) { +pp$1.parseLabeledStatement = function(node, maybeName, expr, context) { var this$1 = this; for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1) @@ -1078,7 +1105,7 @@ pp$1.parseLabeledStatement = function(node, maybeName, expr) { } else { break } } this.labels.push({name: maybeName, kind: kind, statementStart: this.start}); - node.body = this.parseStatement(true); + node.body = this.parseStatement(context); if (node.body.type === "ClassDeclaration" || node.body.type === "VariableDeclaration" && node.body.kind !== "var" || node.body.type === "FunctionDeclaration" && (this.strict || node.body.generator || node.body.async)) @@ -1098,23 +1125,19 @@ pp$1.parseExpressionStatement = function(node, expr) { // strict"` declarations when `allowStrict` is true (used for // function bodies). -pp$1.parseBlock = function(createNewLexicalScope) { +pp$1.parseBlock = function(createNewLexicalScope, node) { var this$1 = this; if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true; + if ( node === void 0 ) node = this.startNode(); - var node = this.startNode(); node.body = []; this.expect(types.braceL); - if (createNewLexicalScope) { - this.enterLexicalScope(); - } + if (createNewLexicalScope) { this.enterScope(0); } while (!this.eat(types.braceR)) { - var stmt = this$1.parseStatement(true); + var stmt = this$1.parseStatement(null); node.body.push(stmt); } - if (createNewLexicalScope) { - this.exitLexicalScope(); - } + if (createNewLexicalScope) { this.exitScope(); } return this.finishNode(node, "BlockStatement") }; @@ -1129,8 +1152,8 @@ pp$1.parseFor = function(node, init) { this.expect(types.semi); node.update = this.type === types.parenR ? null : this.parseExpression(); this.expect(types.parenR); - this.exitLexicalScope(); - node.body = this.parseStatement(false); + this.exitScope(); + node.body = this.parseStatement("for"); this.labels.pop(); return this.finishNode(node, "ForStatement") }; @@ -1150,8 +1173,8 @@ pp$1.parseForIn = function(node, init) { node.left = init; node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign(); this.expect(types.parenR); - this.exitLexicalScope(); - node.body = this.parseStatement(false); + this.exitScope(); + node.body = this.parseStatement("for"); this.labels.pop(); return this.finishNode(node, type) }; @@ -1183,47 +1206,43 @@ pp$1.parseVar = function(node, isFor, kind) { pp$1.parseVarId = function(decl, kind) { decl.id = this.parseBindingAtom(kind); - this.checkLVal(decl.id, kind, false); + this.checkLVal(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, false); }; +var FUNC_STATEMENT = 1; +var FUNC_HANGING_STATEMENT = 2; +var FUNC_NULLABLE_ID = 4; + // Parse a function declaration or literal (depending on the // `isStatement` parameter). -pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) { +pp$1.parseFunction = function(node, statement, allowExpressionBody, isAsync) { this.initFunction(node); if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync) { node.generator = this.eat(types.star); } if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; } - if (isStatement) { - node.id = isStatement === "nullableID" && this.type !== types.name ? null : this.parseIdent(); - if (node.id) { - this.checkLVal(node.id, this.inModule && !this.inFunction ? "let" : "var"); - } + if (statement & FUNC_STATEMENT) { + node.id = (statement & FUNC_NULLABLE_ID) && this.type !== types.name ? null : this.parseIdent(); + if (node.id && !(statement & FUNC_HANGING_STATEMENT)) + { this.checkLVal(node.id, this.inModule && !this.inFunction ? BIND_LEXICAL : BIND_FUNCTION); } } - var oldInGen = this.inGenerator, oldInAsync = this.inAsync, - oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; - this.inGenerator = node.generator; - this.inAsync = node.async; + var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos; this.yieldPos = 0; this.awaitPos = 0; - this.inFunction = true; - this.enterFunctionScope(); + this.enterScope(functionFlags(node.async, node.generator)); - if (!isStatement) + if (!(statement & FUNC_STATEMENT)) { node.id = this.type === types.name ? this.parseIdent() : null; } this.parseFunctionParams(node); this.parseFunctionBody(node, allowExpressionBody); - this.inGenerator = oldInGen; - this.inAsync = oldInAsync; this.yieldPos = oldYieldPos; this.awaitPos = oldAwaitPos; - this.inFunction = oldInFunc; - return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") + return this.finishNode(node, (statement & FUNC_STATEMENT) ? "FunctionDeclaration" : "FunctionExpression") }; pp$1.parseFunctionParams = function(node) { @@ -1247,17 +1266,20 @@ pp$1.parseClass = function(node, isStatement) { classBody.body = []; this.expect(types.braceL); while (!this.eat(types.braceR)) { - var member = this$1.parseClassMember(classBody); - if (member && member.type === "MethodDefinition" && member.kind === "constructor") { - if (hadConstructor) { this$1.raise(member.start, "Duplicate constructor in the same class"); } - hadConstructor = true; + var element = this$1.parseClassElement(); + if (element) { + classBody.body.push(element); + if (element.type === "MethodDefinition" && element.kind === "constructor") { + if (hadConstructor) { this$1.raise(element.start, "Duplicate constructor in the same class"); } + hadConstructor = true; + } } } node.body = this.finishNode(classBody, "ClassBody"); return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") }; -pp$1.parseClassMember = function(classBody) { +pp$1.parseClassElement = function() { var this$1 = this; if (this.eat(types.semi)) { return null } @@ -1302,7 +1324,7 @@ pp$1.parseClassMember = function(classBody) { } else if (method.static && key.type === "Identifier" && key.name === "prototype") { this.raise(key.start, "Classes may not have a static property named prototype"); } - this.parseClassMethod(classBody, method, isGenerator, isAsync); + this.parseClassMethod(method, isGenerator, isAsync); if (method.kind === "get" && method.value.params.length !== 0) { this.raiseRecoverable(method.value.start, "getter should have no params"); } if (method.kind === "set" && method.value.params.length !== 1) @@ -1312,9 +1334,9 @@ pp$1.parseClassMember = function(classBody) { return method }; -pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) { +pp$1.parseClassMethod = function(method, isGenerator, isAsync) { method.value = this.parseMethod(isGenerator, isAsync); - classBody.body.push(this.finishNode(method, "MethodDefinition")); + return this.finishNode(method, "MethodDefinition") }; pp$1.parseClassId = function(node, isStatement) { @@ -1346,7 +1368,7 @@ pp$1.parseExport = function(node, exports) { var fNode = this.startNode(); this.next(); if (isAsync) { this.next(); } - node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync); + node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync, true); } else if (this.type === types._class) { var cNode = this.startNode(); node.declaration = this.parseClass(cNode, "nullableID"); @@ -1358,7 +1380,7 @@ pp$1.parseExport = function(node, exports) { } // export var|const|let|function|class ... if (this.shouldParseExportStatement()) { - node.declaration = this.parseStatement(true); + node.declaration = this.parseStatement(null); if (node.declaration.type === "VariableDeclaration") { this.checkVariableExport(exports, node.declaration.declarations); } else @@ -1493,7 +1515,7 @@ pp$1.parseImportSpecifiers = function() { // import defaultObj, { x, y as z } from '...' var node = this.startNode(); node.local = this.parseIdent(); - this.checkLVal(node.local, "let"); + this.checkLVal(node.local, BIND_LEXICAL); nodes.push(this.finishNode(node, "ImportDefaultSpecifier")); if (!this.eat(types.comma)) { return nodes } } @@ -1502,7 +1524,7 @@ pp$1.parseImportSpecifiers = function() { this.next(); this.expectContextual("as"); node$1.local = this.parseIdent(); - this.checkLVal(node$1.local, "let"); + this.checkLVal(node$1.local, BIND_LEXICAL); nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier")); return nodes } @@ -1521,7 +1543,7 @@ pp$1.parseImportSpecifiers = function() { this$1.checkUnreserved(node$2.imported); node$2.local = node$2.imported; } - this$1.checkLVal(node$2.local, "let"); + this$1.checkLVal(node$2.local, BIND_LEXICAL); nodes.push(this$1.finishNode(node$2, "ImportSpecifier")); } return nodes @@ -1736,6 +1758,7 @@ pp$2.parseMaybeDefault = function(startPos, startLoc, left) { pp$2.checkLVal = function(expr, bindingType, checkClashes) { var this$1 = this; + if ( bindingType === void 0 ) bindingType = BIND_NONE; switch (expr.type) { case "Identifier": @@ -1746,19 +1769,7 @@ pp$2.checkLVal = function(expr, bindingType, checkClashes) { { this.raiseRecoverable(expr.start, "Argument name clash"); } checkClashes[expr.name] = true; } - if (bindingType && bindingType !== "none") { - if ( - bindingType === "var" && !this.canDeclareVarName(expr.name) || - bindingType !== "var" && !this.canDeclareLexicalName(expr.name) - ) { - this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared")); - } - if (bindingType === "var") { - this.declareVarName(expr.name); - } else { - this.declareLexicalName(expr.name); - } - } + if (bindingType !== BIND_NONE && bindingType !== BIND_OUTSIDE) { this.declareName(expr.name, bindingType, expr.start); } break case "MemberExpression": @@ -1907,13 +1918,19 @@ pp$3.parseExpression = function(noIn, refDestructuringErrors) { // operators like `+=`. pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) { - if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() } + if (this.isContextual("yield")) { + if (this.inGenerator) { return this.parseYield() } + // The tokenizer will assume an expression is allowed after + // `yield`, but this isn't that kind of yield + else { this.exprAllowed = false; } + } - var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1; + var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1, oldShorthandAssign = -1; if (refDestructuringErrors) { oldParenAssign = refDestructuringErrors.parenthesizedAssign; oldTrailingComma = refDestructuringErrors.trailingComma; - refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1; + oldShorthandAssign = refDestructuringErrors.shorthandAssign; + refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = refDestructuringErrors.shorthandAssign = -1; } else { refDestructuringErrors = new DestructuringErrors; ownDestructuringErrors = true; @@ -1939,6 +1956,7 @@ pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) { } if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; } if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; } + if (oldShorthandAssign > -1) { refDestructuringErrors.shorthandAssign = oldShorthandAssign; } return left }; @@ -2130,7 +2148,7 @@ pp$3.parseExprAtom = function(refDestructuringErrors) { var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc; var id = this.parseIdent(this.type !== types.name); if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function)) - { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) } + { return this.parseFunction(this.startNodeAt(startPos, startLoc), 0, false, true) } if (canBeArrow && !this.canInsertSemicolon()) { if (this.eat(types.arrow)) { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) } @@ -2181,7 +2199,7 @@ pp$3.parseExprAtom = function(refDestructuringErrors) { case types._function: node = this.startNode(); this.next(); - return this.parseFunction(node, false) + return this.parseFunction(node, 0) case types._class: return this.parseClass(this.startNode(), false) @@ -2300,7 +2318,7 @@ pp$3.parseNew = function() { node.property = this.parseIdent(true); if (node.property.name !== "target" || containsEsc) { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); } - if (!this.inFunction) + if (!this.inNonArrowFunction()) { this.raiseRecoverable(node.start, "new.target can only be used in functions"); } return this.finishNode(node, "MetaProperty") } @@ -2500,19 +2518,14 @@ pp$3.parsePropertyName = function(prop) { pp$3.initFunction = function(node) { node.id = null; - if (this.options.ecmaVersion >= 6) { - node.generator = false; - node.expression = false; - } - if (this.options.ecmaVersion >= 8) - { node.async = false; } + if (this.options.ecmaVersion >= 6) { node.generator = node.expression = false; } + if (this.options.ecmaVersion >= 8) { node.async = false; } }; // Parse object or class method. pp$3.parseMethod = function(isGenerator, isAsync) { - var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, - oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + var node = this.startNode(), oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos; this.initFunction(node); if (this.options.ecmaVersion >= 6) @@ -2520,51 +2533,37 @@ pp$3.parseMethod = function(isGenerator, isAsync) { if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; } - this.inGenerator = node.generator; - this.inAsync = node.async; this.yieldPos = 0; this.awaitPos = 0; - this.inFunction = true; - this.enterFunctionScope(); + this.enterScope(functionFlags(isAsync, node.generator)); this.expect(types.parenL); node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); this.checkYieldAwaitInDefaultParams(); this.parseFunctionBody(node, false); - this.inGenerator = oldInGen; - this.inAsync = oldInAsync; this.yieldPos = oldYieldPos; this.awaitPos = oldAwaitPos; - this.inFunction = oldInFunc; return this.finishNode(node, "FunctionExpression") }; // Parse arrow function expression with given parameters. pp$3.parseArrowExpression = function(node, params, isAsync) { - var oldInGen = this.inGenerator, oldInAsync = this.inAsync, - oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + var oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos; - this.enterFunctionScope(); + this.enterScope(functionFlags(isAsync, false) | SCOPE_ARROW); this.initFunction(node); - if (this.options.ecmaVersion >= 8) - { node.async = !!isAsync; } + if (this.options.ecmaVersion >= 8) { node.async = !!isAsync; } - this.inGenerator = false; - this.inAsync = node.async; this.yieldPos = 0; this.awaitPos = 0; - this.inFunction = true; node.params = this.toAssignableList(params, true); this.parseFunctionBody(node, true); - this.inGenerator = oldInGen; - this.inAsync = oldInAsync; this.yieldPos = oldYieldPos; this.awaitPos = oldAwaitPos; - this.inFunction = oldInFunc; return this.finishNode(node, "ArrowFunctionExpression") }; @@ -2602,12 +2601,10 @@ pp$3.parseFunctionBody = function(node, isArrowFunction) { this.adaptDirectivePrologue(node.body.body); this.labels = oldLabels; } - this.exitFunctionScope(); + this.exitScope(); - if (this.strict && node.id) { - // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval' - this.checkLVal(node.id, "none"); - } + // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval' + if (this.strict && node.id) { this.checkLVal(node.id, BIND_OUTSIDE); } this.strict = oldStrict; }; @@ -2632,7 +2629,7 @@ pp$3.checkParams = function(node, allowDuplicates) { { var param = list[i]; - this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash); + this$1.checkLVal(param, BIND_VAR, allowDuplicates ? null : nameHash); } }; @@ -2676,7 +2673,7 @@ pp$3.checkUnreserved = function(ref) { { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); } if (this.inAsync && name === "await") { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); } - if (this.isKeyword(name)) + if (this.keywords.test(name)) { this.raise(start, ("Unexpected keyword '" + name + "'")); } if (this.options.ecmaVersion < 6 && this.input.slice(start, end).indexOf("\\") !== -1) { return } @@ -2769,79 +2766,69 @@ pp$4.curPosition = function() { var pp$5 = Parser.prototype; -// Object.assign polyfill -var assign = Object.assign || function(target) { - var sources = [], len = arguments.length - 1; - while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ]; - - for (var i = 0, list = sources; i < list.length; i += 1) { - var source = list[i]; - - for (var key in source) { - if (has(source, key)) { - target[key] = source[key]; - } - } - } - return target +var Scope = function Scope(flags) { + this.flags = flags; + // A list of var-declared names in the current lexical scope + this.var = []; + // A list of lexically-declared names in the current lexical scope + this.lexical = []; }; // The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names. -pp$5.enterFunctionScope = function() { - // var: a hash of var-declared names in the current lexical scope - // lexical: a hash of lexically-declared names in the current lexical scope - // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope) - // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope) - this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}}); +pp$5.enterScope = function(flags) { + this.scopeStack.push(new Scope(flags)); }; -pp$5.exitFunctionScope = function() { +pp$5.exitScope = function() { this.scopeStack.pop(); }; -pp$5.enterLexicalScope = function() { - var parentScope = this.scopeStack[this.scopeStack.length - 1]; - var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}; - - this.scopeStack.push(childScope); - assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical); -}; - -pp$5.exitLexicalScope = function() { - var childScope = this.scopeStack.pop(); - var parentScope = this.scopeStack[this.scopeStack.length - 1]; +pp$5.declareName = function(name, bindingType, pos) { + var this$1 = this; - assign(parentScope.childVar, childScope.var, childScope.childVar); + var redeclared = false; + if (bindingType === BIND_LEXICAL) { + var scope = this.currentScope(); + redeclared = scope.lexical.indexOf(name) > -1 || scope.var.indexOf(name) > -1; + scope.lexical.push(name); + } else if (bindingType === BIND_SIMPLE_CATCH) { + var scope$1 = this.currentScope(); + scope$1.lexical.push(name); + } else if (bindingType === BIND_FUNCTION) { + var scope$2 = this.currentScope(); + redeclared = scope$2.lexical.indexOf(name) > -1; + scope$2.var.push(name); + } else { + for (var i = this.scopeStack.length - 1; i >= 0; --i) { + var scope$3 = this$1.scopeStack[i]; + if (scope$3.lexical.indexOf(name) > -1 && !(scope$3.flags & SCOPE_SIMPLE_CATCH) && scope$3.lexical[0] === name) { redeclared = true; } + scope$3.var.push(name); + if (scope$3.flags & SCOPE_VAR) { break } + } + } + if (redeclared) { this.raiseRecoverable(pos, ("Identifier '" + name + "' has already been declared")); } }; -/** - * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const` - * in the current lexical scope or any of the parent lexical scopes in this function. - */ -pp$5.canDeclareVarName = function(name) { - var currentScope = this.scopeStack[this.scopeStack.length - 1]; - - return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name) +pp$5.currentScope = function() { + return this.scopeStack[this.scopeStack.length - 1] }; -/** - * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const` - * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in - * any child lexical scopes in this function. - */ -pp$5.canDeclareLexicalName = function(name) { - var currentScope = this.scopeStack[this.scopeStack.length - 1]; +pp$5.currentVarScope = function() { + var this$1 = this; - return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name) + for (var i = this.scopeStack.length - 1;; i--) { + var scope = this$1.scopeStack[i]; + if (scope.flags & SCOPE_VAR) { return scope } + } }; -pp$5.declareVarName = function(name) { - this.scopeStack[this.scopeStack.length - 1].var[name] = true; -}; +pp$5.inNonArrowFunction = function() { + var this$1 = this; -pp$5.declareLexicalName = function(name) { - this.scopeStack[this.scopeStack.length - 1].lexical[name] = true; + for (var i = this.scopeStack.length - 1; i >= 0; i--) + { if (this$1.scopeStack[i].flags & SCOPE_FUNCTION && !(this$1.scopeStack[i].flags & SCOPE_ARROW)) { return true } } + return false }; var Node = function Node(parser, pos, loc) { @@ -5268,14 +5255,9 @@ pp$8.readWord = function() { // // [ghbt]: https://github.com/acornjs/acorn/issues // -// This file defines the main parser interface. The library also comes -// with a [error-tolerant parser][dammit] and an -// [abstract syntax tree walker][walk], defined in other files. -// -// [dammit]: acorn_loose.js // [walk]: util/walk.js -var version = "5.7.3"; +var version = "6.0.2"; // The main exported interface (under `self.acorn` when in the // browser) is a `parse` function that takes a code string and @@ -5285,7 +5267,7 @@ var version = "5.7.3"; // [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API function parse(input, options) { - return new Parser(options, input).parse() + return Parser.parse(input, options) } // This function tries to parse a single expression at a given @@ -5293,35 +5275,21 @@ function parse(input, options) { // that embed JavaScript expressions. function parseExpressionAt(input, pos, options) { - var p = new Parser(options, input, pos); - p.nextToken(); - return p.parseExpression() + return Parser.parseExpressionAt(input, pos, options) } // Acorn is organized as a tokenizer and a recursive-descent parser. // The `tokenizer` export provides an interface to the tokenizer. function tokenizer(input, options) { - return new Parser(options, input) -} - -// This is a terrible kludge to support the existing, pre-ES6 -// interface where the loose parser module retroactively adds exports -// to this module. - // eslint-disable-line camelcase -function addLooseExports(parse, Parser$$1, plugins$$1) { - exports.parse_dammit = parse; // eslint-disable-line camelcase - exports.LooseParser = Parser$$1; - exports.pluginsLoose = plugins$$1; + return Parser.tokenizer(input, options) } exports.version = version; exports.parse = parse; exports.parseExpressionAt = parseExpressionAt; exports.tokenizer = tokenizer; -exports.addLooseExports = addLooseExports; exports.Parser = Parser; -exports.plugins = plugins; exports.defaultOptions = defaultOptions; exports.Position = Position; exports.SourceLocation = SourceLocation; @@ -5343,3 +5311,4 @@ exports.nonASCIIwhitespace = nonASCIIwhitespace; Object.defineProperty(exports, '__esModule', { value: true }); }))); +//# sourceMappingURL=acorn.js.map diff --git a/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js.map b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js.map new file mode 100644 index 00000000000000..57c8681c2eac8e --- /dev/null +++ b/tools/node_modules/eslint/node_modules/acorn/dist/acorn.js.map @@ -0,0 +1 @@ +{"version":3,"file":"acorn.js","sources":["../src/identifier.js","../src/tokentype.js","../src/whitespace.js","../src/util.js","../src/locutil.js","../src/options.js","../src/scopeflags.js","../src/state.js","../src/parseutil.js","../src/statement.js","../src/lval.js","../src/expression.js","../src/location.js","../src/scope.js","../src/node.js","../src/tokencontext.js","../src/unicode-property-data.js","../src/regexp.js","../src/tokenize.js","../src/index.js"],"sourcesContent":["// Reserved word lists for various dialects of the language\n\nexport const reservedWords = {\n 3: \"abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile\",\n 5: \"class enum extends super const export import\",\n 6: \"enum\",\n strict: \"implements interface let package private protected public static yield\",\n strictBind: \"eval arguments\"\n}\n\n// And the keywords\n\nconst ecma5AndLessKeywords = \"break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this\"\n\nexport const keywords = {\n 5: ecma5AndLessKeywords,\n 6: ecma5AndLessKeywords + \" const class extends export import super\"\n}\n\nexport const keywordRelationalOperator = /^in(stanceof)?$/\n\n// ## Character categories\n\n// Big ugly regular expressions that match characters in the\n// whitespace, identifier, and identifier-start categories. These\n// are only applied when a character is found to actually have a\n// code point above 128.\n// Generated by `bin/generate-identifier-regex.js`.\n\nlet nonASCIIidentifierStartChars = \"\\xaa\\xb5\\xba\\xc0-\\xd6\\xd8-\\xf6\\xf8-\\u02c1\\u02c6-\\u02d1\\u02e0-\\u02e4\\u02ec\\u02ee\\u0370-\\u0374\\u0376\\u0377\\u037a-\\u037d\\u037f\\u0386\\u0388-\\u038a\\u038c\\u038e-\\u03a1\\u03a3-\\u03f5\\u03f7-\\u0481\\u048a-\\u052f\\u0531-\\u0556\\u0559\\u0560-\\u0588\\u05d0-\\u05ea\\u05ef-\\u05f2\\u0620-\\u064a\\u066e\\u066f\\u0671-\\u06d3\\u06d5\\u06e5\\u06e6\\u06ee\\u06ef\\u06fa-\\u06fc\\u06ff\\u0710\\u0712-\\u072f\\u074d-\\u07a5\\u07b1\\u07ca-\\u07ea\\u07f4\\u07f5\\u07fa\\u0800-\\u0815\\u081a\\u0824\\u0828\\u0840-\\u0858\\u0860-\\u086a\\u08a0-\\u08b4\\u08b6-\\u08bd\\u0904-\\u0939\\u093d\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098c\\u098f\\u0990\\u0993-\\u09a8\\u09aa-\\u09b0\\u09b2\\u09b6-\\u09b9\\u09bd\\u09ce\\u09dc\\u09dd\\u09df-\\u09e1\\u09f0\\u09f1\\u09fc\\u0a05-\\u0a0a\\u0a0f\\u0a10\\u0a13-\\u0a28\\u0a2a-\\u0a30\\u0a32\\u0a33\\u0a35\\u0a36\\u0a38\\u0a39\\u0a59-\\u0a5c\\u0a5e\\u0a72-\\u0a74\\u0a85-\\u0a8d\\u0a8f-\\u0a91\\u0a93-\\u0aa8\\u0aaa-\\u0ab0\\u0ab2\\u0ab3\\u0ab5-\\u0ab9\\u0abd\\u0ad0\\u0ae0\\u0ae1\\u0af9\\u0b05-\\u0b0c\\u0b0f\\u0b10\\u0b13-\\u0b28\\u0b2a-\\u0b30\\u0b32\\u0b33\\u0b35-\\u0b39\\u0b3d\\u0b5c\\u0b5d\\u0b5f-\\u0b61\\u0b71\\u0b83\\u0b85-\\u0b8a\\u0b8e-\\u0b90\\u0b92-\\u0b95\\u0b99\\u0b9a\\u0b9c\\u0b9e\\u0b9f\\u0ba3\\u0ba4\\u0ba8-\\u0baa\\u0bae-\\u0bb9\\u0bd0\\u0c05-\\u0c0c\\u0c0e-\\u0c10\\u0c12-\\u0c28\\u0c2a-\\u0c39\\u0c3d\\u0c58-\\u0c5a\\u0c60\\u0c61\\u0c80\\u0c85-\\u0c8c\\u0c8e-\\u0c90\\u0c92-\\u0ca8\\u0caa-\\u0cb3\\u0cb5-\\u0cb9\\u0cbd\\u0cde\\u0ce0\\u0ce1\\u0cf1\\u0cf2\\u0d05-\\u0d0c\\u0d0e-\\u0d10\\u0d12-\\u0d3a\\u0d3d\\u0d4e\\u0d54-\\u0d56\\u0d5f-\\u0d61\\u0d7a-\\u0d7f\\u0d85-\\u0d96\\u0d9a-\\u0db1\\u0db3-\\u0dbb\\u0dbd\\u0dc0-\\u0dc6\\u0e01-\\u0e30\\u0e32\\u0e33\\u0e40-\\u0e46\\u0e81\\u0e82\\u0e84\\u0e87\\u0e88\\u0e8a\\u0e8d\\u0e94-\\u0e97\\u0e99-\\u0e9f\\u0ea1-\\u0ea3\\u0ea5\\u0ea7\\u0eaa\\u0eab\\u0ead-\\u0eb0\\u0eb2\\u0eb3\\u0ebd\\u0ec0-\\u0ec4\\u0ec6\\u0edc-\\u0edf\\u0f00\\u0f40-\\u0f47\\u0f49-\\u0f6c\\u0f88-\\u0f8c\\u1000-\\u102a\\u103f\\u1050-\\u1055\\u105a-\\u105d\\u1061\\u1065\\u1066\\u106e-\\u1070\\u1075-\\u1081\\u108e\\u10a0-\\u10c5\\u10c7\\u10cd\\u10d0-\\u10fa\\u10fc-\\u1248\\u124a-\\u124d\\u1250-\\u1256\\u1258\\u125a-\\u125d\\u1260-\\u1288\\u128a-\\u128d\\u1290-\\u12b0\\u12b2-\\u12b5\\u12b8-\\u12be\\u12c0\\u12c2-\\u12c5\\u12c8-\\u12d6\\u12d8-\\u1310\\u1312-\\u1315\\u1318-\\u135a\\u1380-\\u138f\\u13a0-\\u13f5\\u13f8-\\u13fd\\u1401-\\u166c\\u166f-\\u167f\\u1681-\\u169a\\u16a0-\\u16ea\\u16ee-\\u16f8\\u1700-\\u170c\\u170e-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176c\\u176e-\\u1770\\u1780-\\u17b3\\u17d7\\u17dc\\u1820-\\u1878\\u1880-\\u18a8\\u18aa\\u18b0-\\u18f5\\u1900-\\u191e\\u1950-\\u196d\\u1970-\\u1974\\u1980-\\u19ab\\u19b0-\\u19c9\\u1a00-\\u1a16\\u1a20-\\u1a54\\u1aa7\\u1b05-\\u1b33\\u1b45-\\u1b4b\\u1b83-\\u1ba0\\u1bae\\u1baf\\u1bba-\\u1be5\\u1c00-\\u1c23\\u1c4d-\\u1c4f\\u1c5a-\\u1c7d\\u1c80-\\u1c88\\u1c90-\\u1cba\\u1cbd-\\u1cbf\\u1ce9-\\u1cec\\u1cee-\\u1cf1\\u1cf5\\u1cf6\\u1d00-\\u1dbf\\u1e00-\\u1f15\\u1f18-\\u1f1d\\u1f20-\\u1f45\\u1f48-\\u1f4d\\u1f50-\\u1f57\\u1f59\\u1f5b\\u1f5d\\u1f5f-\\u1f7d\\u1f80-\\u1fb4\\u1fb6-\\u1fbc\\u1fbe\\u1fc2-\\u1fc4\\u1fc6-\\u1fcc\\u1fd0-\\u1fd3\\u1fd6-\\u1fdb\\u1fe0-\\u1fec\\u1ff2-\\u1ff4\\u1ff6-\\u1ffc\\u2071\\u207f\\u2090-\\u209c\\u2102\\u2107\\u210a-\\u2113\\u2115\\u2118-\\u211d\\u2124\\u2126\\u2128\\u212a-\\u2139\\u213c-\\u213f\\u2145-\\u2149\\u214e\\u2160-\\u2188\\u2c00-\\u2c2e\\u2c30-\\u2c5e\\u2c60-\\u2ce4\\u2ceb-\\u2cee\\u2cf2\\u2cf3\\u2d00-\\u2d25\\u2d27\\u2d2d\\u2d30-\\u2d67\\u2d6f\\u2d80-\\u2d96\\u2da0-\\u2da6\\u2da8-\\u2dae\\u2db0-\\u2db6\\u2db8-\\u2dbe\\u2dc0-\\u2dc6\\u2dc8-\\u2dce\\u2dd0-\\u2dd6\\u2dd8-\\u2dde\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303c\\u3041-\\u3096\\u309b-\\u309f\\u30a1-\\u30fa\\u30fc-\\u30ff\\u3105-\\u312f\\u3131-\\u318e\\u31a0-\\u31ba\\u31f0-\\u31ff\\u3400-\\u4db5\\u4e00-\\u9fef\\ua000-\\ua48c\\ua4d0-\\ua4fd\\ua500-\\ua60c\\ua610-\\ua61f\\ua62a\\ua62b\\ua640-\\ua66e\\ua67f-\\ua69d\\ua6a0-\\ua6ef\\ua717-\\ua71f\\ua722-\\ua788\\ua78b-\\ua7b9\\ua7f7-\\ua801\\ua803-\\ua805\\ua807-\\ua80a\\ua80c-\\ua822\\ua840-\\ua873\\ua882-\\ua8b3\\ua8f2-\\ua8f7\\ua8fb\\ua8fd\\ua8fe\\ua90a-\\ua925\\ua930-\\ua946\\ua960-\\ua97c\\ua984-\\ua9b2\\ua9cf\\ua9e0-\\ua9e4\\ua9e6-\\ua9ef\\ua9fa-\\ua9fe\\uaa00-\\uaa28\\uaa40-\\uaa42\\uaa44-\\uaa4b\\uaa60-\\uaa76\\uaa7a\\uaa7e-\\uaaaf\\uaab1\\uaab5\\uaab6\\uaab9-\\uaabd\\uaac0\\uaac2\\uaadb-\\uaadd\\uaae0-\\uaaea\\uaaf2-\\uaaf4\\uab01-\\uab06\\uab09-\\uab0e\\uab11-\\uab16\\uab20-\\uab26\\uab28-\\uab2e\\uab30-\\uab5a\\uab5c-\\uab65\\uab70-\\uabe2\\uac00-\\ud7a3\\ud7b0-\\ud7c6\\ud7cb-\\ud7fb\\uf900-\\ufa6d\\ufa70-\\ufad9\\ufb00-\\ufb06\\ufb13-\\ufb17\\ufb1d\\ufb1f-\\ufb28\\ufb2a-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40\\ufb41\\ufb43\\ufb44\\ufb46-\\ufbb1\\ufbd3-\\ufd3d\\ufd50-\\ufd8f\\ufd92-\\ufdc7\\ufdf0-\\ufdfb\\ufe70-\\ufe74\\ufe76-\\ufefc\\uff21-\\uff3a\\uff41-\\uff5a\\uff66-\\uffbe\\uffc2-\\uffc7\\uffca-\\uffcf\\uffd2-\\uffd7\\uffda-\\uffdc\"\nlet nonASCIIidentifierChars = \"\\u200c\\u200d\\xb7\\u0300-\\u036f\\u0387\\u0483-\\u0487\\u0591-\\u05bd\\u05bf\\u05c1\\u05c2\\u05c4\\u05c5\\u05c7\\u0610-\\u061a\\u064b-\\u0669\\u0670\\u06d6-\\u06dc\\u06df-\\u06e4\\u06e7\\u06e8\\u06ea-\\u06ed\\u06f0-\\u06f9\\u0711\\u0730-\\u074a\\u07a6-\\u07b0\\u07c0-\\u07c9\\u07eb-\\u07f3\\u07fd\\u0816-\\u0819\\u081b-\\u0823\\u0825-\\u0827\\u0829-\\u082d\\u0859-\\u085b\\u08d3-\\u08e1\\u08e3-\\u0903\\u093a-\\u093c\\u093e-\\u094f\\u0951-\\u0957\\u0962\\u0963\\u0966-\\u096f\\u0981-\\u0983\\u09bc\\u09be-\\u09c4\\u09c7\\u09c8\\u09cb-\\u09cd\\u09d7\\u09e2\\u09e3\\u09e6-\\u09ef\\u09fe\\u0a01-\\u0a03\\u0a3c\\u0a3e-\\u0a42\\u0a47\\u0a48\\u0a4b-\\u0a4d\\u0a51\\u0a66-\\u0a71\\u0a75\\u0a81-\\u0a83\\u0abc\\u0abe-\\u0ac5\\u0ac7-\\u0ac9\\u0acb-\\u0acd\\u0ae2\\u0ae3\\u0ae6-\\u0aef\\u0afa-\\u0aff\\u0b01-\\u0b03\\u0b3c\\u0b3e-\\u0b44\\u0b47\\u0b48\\u0b4b-\\u0b4d\\u0b56\\u0b57\\u0b62\\u0b63\\u0b66-\\u0b6f\\u0b82\\u0bbe-\\u0bc2\\u0bc6-\\u0bc8\\u0bca-\\u0bcd\\u0bd7\\u0be6-\\u0bef\\u0c00-\\u0c04\\u0c3e-\\u0c44\\u0c46-\\u0c48\\u0c4a-\\u0c4d\\u0c55\\u0c56\\u0c62\\u0c63\\u0c66-\\u0c6f\\u0c81-\\u0c83\\u0cbc\\u0cbe-\\u0cc4\\u0cc6-\\u0cc8\\u0cca-\\u0ccd\\u0cd5\\u0cd6\\u0ce2\\u0ce3\\u0ce6-\\u0cef\\u0d00-\\u0d03\\u0d3b\\u0d3c\\u0d3e-\\u0d44\\u0d46-\\u0d48\\u0d4a-\\u0d4d\\u0d57\\u0d62\\u0d63\\u0d66-\\u0d6f\\u0d82\\u0d83\\u0dca\\u0dcf-\\u0dd4\\u0dd6\\u0dd8-\\u0ddf\\u0de6-\\u0def\\u0df2\\u0df3\\u0e31\\u0e34-\\u0e3a\\u0e47-\\u0e4e\\u0e50-\\u0e59\\u0eb1\\u0eb4-\\u0eb9\\u0ebb\\u0ebc\\u0ec8-\\u0ecd\\u0ed0-\\u0ed9\\u0f18\\u0f19\\u0f20-\\u0f29\\u0f35\\u0f37\\u0f39\\u0f3e\\u0f3f\\u0f71-\\u0f84\\u0f86\\u0f87\\u0f8d-\\u0f97\\u0f99-\\u0fbc\\u0fc6\\u102b-\\u103e\\u1040-\\u1049\\u1056-\\u1059\\u105e-\\u1060\\u1062-\\u1064\\u1067-\\u106d\\u1071-\\u1074\\u1082-\\u108d\\u108f-\\u109d\\u135d-\\u135f\\u1369-\\u1371\\u1712-\\u1714\\u1732-\\u1734\\u1752\\u1753\\u1772\\u1773\\u17b4-\\u17d3\\u17dd\\u17e0-\\u17e9\\u180b-\\u180d\\u1810-\\u1819\\u18a9\\u1920-\\u192b\\u1930-\\u193b\\u1946-\\u194f\\u19d0-\\u19da\\u1a17-\\u1a1b\\u1a55-\\u1a5e\\u1a60-\\u1a7c\\u1a7f-\\u1a89\\u1a90-\\u1a99\\u1ab0-\\u1abd\\u1b00-\\u1b04\\u1b34-\\u1b44\\u1b50-\\u1b59\\u1b6b-\\u1b73\\u1b80-\\u1b82\\u1ba1-\\u1bad\\u1bb0-\\u1bb9\\u1be6-\\u1bf3\\u1c24-\\u1c37\\u1c40-\\u1c49\\u1c50-\\u1c59\\u1cd0-\\u1cd2\\u1cd4-\\u1ce8\\u1ced\\u1cf2-\\u1cf4\\u1cf7-\\u1cf9\\u1dc0-\\u1df9\\u1dfb-\\u1dff\\u203f\\u2040\\u2054\\u20d0-\\u20dc\\u20e1\\u20e5-\\u20f0\\u2cef-\\u2cf1\\u2d7f\\u2de0-\\u2dff\\u302a-\\u302f\\u3099\\u309a\\ua620-\\ua629\\ua66f\\ua674-\\ua67d\\ua69e\\ua69f\\ua6f0\\ua6f1\\ua802\\ua806\\ua80b\\ua823-\\ua827\\ua880\\ua881\\ua8b4-\\ua8c5\\ua8d0-\\ua8d9\\ua8e0-\\ua8f1\\ua8ff-\\ua909\\ua926-\\ua92d\\ua947-\\ua953\\ua980-\\ua983\\ua9b3-\\ua9c0\\ua9d0-\\ua9d9\\ua9e5\\ua9f0-\\ua9f9\\uaa29-\\uaa36\\uaa43\\uaa4c\\uaa4d\\uaa50-\\uaa59\\uaa7b-\\uaa7d\\uaab0\\uaab2-\\uaab4\\uaab7\\uaab8\\uaabe\\uaabf\\uaac1\\uaaeb-\\uaaef\\uaaf5\\uaaf6\\uabe3-\\uabea\\uabec\\uabed\\uabf0-\\uabf9\\ufb1e\\ufe00-\\ufe0f\\ufe20-\\ufe2f\\ufe33\\ufe34\\ufe4d-\\ufe4f\\uff10-\\uff19\\uff3f\"\n\nconst nonASCIIidentifierStart = new RegExp(\"[\" + nonASCIIidentifierStartChars + \"]\")\nconst nonASCIIidentifier = new RegExp(\"[\" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + \"]\")\n\nnonASCIIidentifierStartChars = nonASCIIidentifierChars = null\n\n// These are a run-length and offset encoded representation of the\n// >0xffff code points that are a valid part of identifiers. The\n// offset starts at 0x10000, and each pair of numbers represents an\n// offset to the next range, and then a size of the range. They were\n// generated by bin/generate-identifier-regex.js\n\n// eslint-disable-next-line comma-spacing\nconst astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541]\n\n// eslint-disable-next-line comma-spacing\nconst astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]\n\n// This has a complexity linear to the value of the code. The\n// assumption is that looking up astral identifier characters is\n// rare.\nfunction isInAstralSet(code, set) {\n let pos = 0x10000\n for (let i = 0; i < set.length; i += 2) {\n pos += set[i]\n if (pos > code) return false\n pos += set[i + 1]\n if (pos >= code) return true\n }\n}\n\n// Test whether a given character code starts an identifier.\n\nexport function isIdentifierStart(code, astral) {\n if (code < 65) return code === 36\n if (code < 91) return true\n if (code < 97) return code === 95\n if (code < 123) return true\n if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))\n if (astral === false) return false\n return isInAstralSet(code, astralIdentifierStartCodes)\n}\n\n// Test whether a given character is part of an identifier.\n\nexport function isIdentifierChar(code, astral) {\n if (code < 48) return code === 36\n if (code < 58) return true\n if (code < 65) return false\n if (code < 91) return true\n if (code < 97) return code === 95\n if (code < 123) return true\n if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))\n if (astral === false) return false\n return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)\n}\n","// ## Token types\n\n// The assignment of fine-grained, information-carrying type objects\n// allows the tokenizer to store the information it has about a\n// token in a way that is very cheap for the parser to look up.\n\n// All token type variables start with an underscore, to make them\n// easy to recognize.\n\n// The `beforeExpr` property is used to disambiguate between regular\n// expressions and divisions. It is set on all token types that can\n// be followed by an expression (thus, a slash after them would be a\n// regular expression).\n//\n// The `startsExpr` property is used to check if the token ends a\n// `yield` expression. It is set on all token types that either can\n// directly start an expression (like a quotation mark) or can\n// continue an expression (like the body of a string).\n//\n// `isLoop` marks a keyword as starting a loop, which is important\n// to know when parsing a label, in order to allow or disallow\n// continue jumps to that label.\n\nexport class TokenType {\n constructor(label, conf = {}) {\n this.label = label\n this.keyword = conf.keyword\n this.beforeExpr = !!conf.beforeExpr\n this.startsExpr = !!conf.startsExpr\n this.isLoop = !!conf.isLoop\n this.isAssign = !!conf.isAssign\n this.prefix = !!conf.prefix\n this.postfix = !!conf.postfix\n this.binop = conf.binop || null\n this.updateContext = null\n }\n}\n\nfunction binop(name, prec) {\n return new TokenType(name, {beforeExpr: true, binop: prec})\n}\nconst beforeExpr = {beforeExpr: true}, startsExpr = {startsExpr: true}\n\n// Map keyword names to token types.\n\nexport const keywords = {}\n\n// Succinct definitions of keyword token types\nfunction kw(name, options = {}) {\n options.keyword = name\n return keywords[name] = new TokenType(name, options)\n}\n\nexport const types = {\n num: new TokenType(\"num\", startsExpr),\n regexp: new TokenType(\"regexp\", startsExpr),\n string: new TokenType(\"string\", startsExpr),\n name: new TokenType(\"name\", startsExpr),\n eof: new TokenType(\"eof\"),\n\n // Punctuation token types.\n bracketL: new TokenType(\"[\", {beforeExpr: true, startsExpr: true}),\n bracketR: new TokenType(\"]\"),\n braceL: new TokenType(\"{\", {beforeExpr: true, startsExpr: true}),\n braceR: new TokenType(\"}\"),\n parenL: new TokenType(\"(\", {beforeExpr: true, startsExpr: true}),\n parenR: new TokenType(\")\"),\n comma: new TokenType(\",\", beforeExpr),\n semi: new TokenType(\";\", beforeExpr),\n colon: new TokenType(\":\", beforeExpr),\n dot: new TokenType(\".\"),\n question: new TokenType(\"?\", beforeExpr),\n arrow: new TokenType(\"=>\", beforeExpr),\n template: new TokenType(\"template\"),\n invalidTemplate: new TokenType(\"invalidTemplate\"),\n ellipsis: new TokenType(\"...\", beforeExpr),\n backQuote: new TokenType(\"`\", startsExpr),\n dollarBraceL: new TokenType(\"${\", {beforeExpr: true, startsExpr: true}),\n\n // Operators. These carry several kinds of properties to help the\n // parser use them properly (the presence of these properties is\n // what categorizes them as operators).\n //\n // `binop`, when present, specifies that this operator is a binary\n // operator, and will refer to its precedence.\n //\n // `prefix` and `postfix` mark the operator as a prefix or postfix\n // unary operator.\n //\n // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as\n // binary operators with a very low precedence, that should result\n // in AssignmentExpression nodes.\n\n eq: new TokenType(\"=\", {beforeExpr: true, isAssign: true}),\n assign: new TokenType(\"_=\", {beforeExpr: true, isAssign: true}),\n incDec: new TokenType(\"++/--\", {prefix: true, postfix: true, startsExpr: true}),\n prefix: new TokenType(\"!/~\", {beforeExpr: true, prefix: true, startsExpr: true}),\n logicalOR: binop(\"||\", 1),\n logicalAND: binop(\"&&\", 2),\n bitwiseOR: binop(\"|\", 3),\n bitwiseXOR: binop(\"^\", 4),\n bitwiseAND: binop(\"&\", 5),\n equality: binop(\"==/!=/===/!==\", 6),\n relational: binop(\"/<=/>=\", 7),\n bitShift: binop(\"<>/>>>\", 8),\n plusMin: new TokenType(\"+/-\", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),\n modulo: binop(\"%\", 10),\n star: binop(\"*\", 10),\n slash: binop(\"/\", 10),\n starstar: new TokenType(\"**\", {beforeExpr: true}),\n\n // Keyword token types.\n _break: kw(\"break\"),\n _case: kw(\"case\", beforeExpr),\n _catch: kw(\"catch\"),\n _continue: kw(\"continue\"),\n _debugger: kw(\"debugger\"),\n _default: kw(\"default\", beforeExpr),\n _do: kw(\"do\", {isLoop: true, beforeExpr: true}),\n _else: kw(\"else\", beforeExpr),\n _finally: kw(\"finally\"),\n _for: kw(\"for\", {isLoop: true}),\n _function: kw(\"function\", startsExpr),\n _if: kw(\"if\"),\n _return: kw(\"return\", beforeExpr),\n _switch: kw(\"switch\"),\n _throw: kw(\"throw\", beforeExpr),\n _try: kw(\"try\"),\n _var: kw(\"var\"),\n _const: kw(\"const\"),\n _while: kw(\"while\", {isLoop: true}),\n _with: kw(\"with\"),\n _new: kw(\"new\", {beforeExpr: true, startsExpr: true}),\n _this: kw(\"this\", startsExpr),\n _super: kw(\"super\", startsExpr),\n _class: kw(\"class\", startsExpr),\n _extends: kw(\"extends\", beforeExpr),\n _export: kw(\"export\"),\n _import: kw(\"import\"),\n _null: kw(\"null\", startsExpr),\n _true: kw(\"true\", startsExpr),\n _false: kw(\"false\", startsExpr),\n _in: kw(\"in\", {beforeExpr: true, binop: 7}),\n _instanceof: kw(\"instanceof\", {beforeExpr: true, binop: 7}),\n _typeof: kw(\"typeof\", {beforeExpr: true, prefix: true, startsExpr: true}),\n _void: kw(\"void\", {beforeExpr: true, prefix: true, startsExpr: true}),\n _delete: kw(\"delete\", {beforeExpr: true, prefix: true, startsExpr: true})\n}\n","// Matches a whole line break (where CRLF is considered a single\n// line break). Used to count lines.\n\nexport const lineBreak = /\\r\\n?|\\n|\\u2028|\\u2029/\nexport const lineBreakG = new RegExp(lineBreak.source, \"g\")\n\nexport function isNewLine(code, ecma2019String) {\n return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029))\n}\n\nexport const nonASCIIwhitespace = /[\\u1680\\u180e\\u2000-\\u200a\\u202f\\u205f\\u3000\\ufeff]/\n\nexport const skipWhiteSpace = /(?:\\s|\\/\\/.*|\\/\\*[^]*?\\*\\/)*/g\n","const {hasOwnProperty, toString} = Object.prototype\n\n// Checks if an object has a property.\n\nexport function has(obj, propName) {\n return hasOwnProperty.call(obj, propName)\n}\n\nexport const isArray = Array.isArray || ((obj) => (\n toString.call(obj) === \"[object Array]\"\n))\n","import {lineBreakG} from \"./whitespace\"\n\n// These are used when `options.locations` is on, for the\n// `startLoc` and `endLoc` properties.\n\nexport class Position {\n constructor(line, col) {\n this.line = line\n this.column = col\n }\n\n offset(n) {\n return new Position(this.line, this.column + n)\n }\n}\n\nexport class SourceLocation {\n constructor(p, start, end) {\n this.start = start\n this.end = end\n if (p.sourceFile !== null) this.source = p.sourceFile\n }\n}\n\n// The `getLineInfo` function is mostly useful when the\n// `locations` option is off (for performance reasons) and you\n// want to find the line/column position for a given character\n// offset. `input` should be the code string that the offset refers\n// into.\n\nexport function getLineInfo(input, offset) {\n for (let line = 1, cur = 0;;) {\n lineBreakG.lastIndex = cur\n let match = lineBreakG.exec(input)\n if (match && match.index < offset) {\n ++line\n cur = match.index + match[0].length\n } else {\n return new Position(line, offset - cur)\n }\n }\n}\n","import {has, isArray} from \"./util\"\nimport {SourceLocation} from \"./locutil\"\n\n// A second optional argument can be given to further configure\n// the parser process. These options are recognized:\n\nexport const defaultOptions = {\n // `ecmaVersion` indicates the ECMAScript version to parse. Must be\n // either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), or 10\n // (2019). This influences support for strict mode, the set of\n // reserved words, and support for new syntax features. The default\n // is 9.\n ecmaVersion: 9,\n // `sourceType` indicates the mode the code should be parsed in.\n // Can be either `\"script\"` or `\"module\"`. This influences global\n // strict mode and parsing of `import` and `export` declarations.\n sourceType: \"script\",\n // `onInsertedSemicolon` can be a callback that will be called\n // when a semicolon is automatically inserted. It will be passed\n // th position of the comma as an offset, and if `locations` is\n // enabled, it is given the location as a `{line, column}` object\n // as second argument.\n onInsertedSemicolon: null,\n // `onTrailingComma` is similar to `onInsertedSemicolon`, but for\n // trailing commas.\n onTrailingComma: null,\n // By default, reserved words are only enforced if ecmaVersion >= 5.\n // Set `allowReserved` to a boolean value to explicitly turn this on\n // an off. When this option has the value \"never\", reserved words\n // and keywords can also not be used as property names.\n allowReserved: null,\n // When enabled, a return at the top level is not considered an\n // error.\n allowReturnOutsideFunction: false,\n // When enabled, import/export statements are not constrained to\n // appearing at the top of the program.\n allowImportExportEverywhere: false,\n // When enabled, await identifiers are allowed to appear at the top-level scope,\n // but they are still not allowed in non-async functions.\n allowAwaitOutsideFunction: false,\n // When enabled, hashbang directive in the beginning of file\n // is allowed and treated as a line comment.\n allowHashBang: false,\n // When `locations` is on, `loc` properties holding objects with\n // `start` and `end` properties in `{line, column}` form (with\n // line being 1-based and column 0-based) will be attached to the\n // nodes.\n locations: false,\n // A function can be passed as `onToken` option, which will\n // cause Acorn to call that function with object in the same\n // format as tokens returned from `tokenizer().getToken()`. Note\n // that you are not allowed to call the parser from the\n // callback—that will corrupt its internal state.\n onToken: null,\n // A function can be passed as `onComment` option, which will\n // cause Acorn to call that function with `(block, text, start,\n // end)` parameters whenever a comment is skipped. `block` is a\n // boolean indicating whether this is a block (`/* */`) comment,\n // `text` is the content of the comment, and `start` and `end` are\n // character offsets that denote the start and end of the comment.\n // When the `locations` option is on, two more parameters are\n // passed, the full `{line, column}` locations of the start and\n // end of the comments. Note that you are not allowed to call the\n // parser from the callback—that will corrupt its internal state.\n onComment: null,\n // Nodes have their start and end characters offsets recorded in\n // `start` and `end` properties (directly on the node, rather than\n // the `loc` object, which holds line/column data. To also add a\n // [semi-standardized][range] `range` property holding a `[start,\n // end]` array with the same numbers, set the `ranges` option to\n // `true`.\n //\n // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678\n ranges: false,\n // It is possible to parse multiple files into a single AST by\n // passing the tree produced by parsing the first file as\n // `program` option in subsequent parses. This will add the\n // toplevel forms of the parsed file to the `Program` (top) node\n // of an existing parse tree.\n program: null,\n // When `locations` is on, you can pass this to record the source\n // file in every node's `loc` object.\n sourceFile: null,\n // This value, if given, is stored in every node, whether\n // `locations` is on or off.\n directSourceFile: null,\n // When enabled, parenthesized expressions are represented by\n // (non-standard) ParenthesizedExpression nodes\n preserveParens: false\n}\n\n// Interpret and default an options object\n\nexport function getOptions(opts) {\n let options = {}\n\n for (let opt in defaultOptions)\n options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]\n\n if (options.ecmaVersion >= 2015)\n options.ecmaVersion -= 2009\n\n if (options.allowReserved == null)\n options.allowReserved = options.ecmaVersion < 5\n\n if (isArray(options.onToken)) {\n let tokens = options.onToken\n options.onToken = (token) => tokens.push(token)\n }\n if (isArray(options.onComment))\n options.onComment = pushComment(options, options.onComment)\n\n return options\n}\n\nfunction pushComment(options, array) {\n return function(block, text, start, end, startLoc, endLoc) {\n let comment = {\n type: block ? \"Block\" : \"Line\",\n value: text,\n start: start,\n end: end\n }\n if (options.locations)\n comment.loc = new SourceLocation(this, startLoc, endLoc)\n if (options.ranges)\n comment.range = [start, end]\n array.push(comment)\n }\n}\n","// Each scope gets a bitset that may contain these flags\nexport const\n SCOPE_TOP = 1,\n SCOPE_FUNCTION = 2,\n SCOPE_VAR = SCOPE_TOP | SCOPE_FUNCTION,\n SCOPE_ASYNC = 4,\n SCOPE_GENERATOR = 8,\n SCOPE_ARROW = 16,\n SCOPE_SIMPLE_CATCH = 32\n\nexport function functionFlags(async, generator) {\n return SCOPE_FUNCTION | (async ? SCOPE_ASYNC : 0) | (generator ? SCOPE_GENERATOR : 0)\n}\n\n// Used in checkLVal and declareName to determine the type of a binding\nexport const\n BIND_NONE = 0, // Not a binding\n BIND_VAR = 1, // Var-style binding\n BIND_LEXICAL = 2, // Let- or const-style binding\n BIND_FUNCTION = 3, // Function declaration\n BIND_SIMPLE_CATCH = 4, // Simple (identifier pattern) catch binding\n BIND_OUTSIDE = 5 // Special case for function names as bound inside the function\n","import {reservedWords, keywords} from \"./identifier\"\nimport {types as tt} from \"./tokentype\"\nimport {lineBreak} from \"./whitespace\"\nimport {getOptions} from \"./options\"\nimport {SCOPE_TOP, SCOPE_FUNCTION, SCOPE_ASYNC, SCOPE_GENERATOR} from \"./scopeflags\"\n\nfunction keywordRegexp(words) {\n return new RegExp(\"^(?:\" + words.replace(/ /g, \"|\") + \")$\")\n}\n\nexport class Parser {\n constructor(options, input, startPos) {\n this.options = options = getOptions(options)\n this.sourceFile = options.sourceFile\n this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])\n let reserved = \"\"\n if (!options.allowReserved) {\n for (let v = options.ecmaVersion;; v--)\n if (reserved = reservedWords[v]) break\n if (options.sourceType === \"module\") reserved += \" await\"\n }\n this.reservedWords = keywordRegexp(reserved)\n let reservedStrict = (reserved ? reserved + \" \" : \"\") + reservedWords.strict\n this.reservedWordsStrict = keywordRegexp(reservedStrict)\n this.reservedWordsStrictBind = keywordRegexp(reservedStrict + \" \" + reservedWords.strictBind)\n this.input = String(input)\n\n // Used to signal to callers of `readWord1` whether the word\n // contained any escape sequences. This is needed because words with\n // escape sequences must not be interpreted as keywords.\n this.containsEsc = false\n\n // Set up token state\n\n // The current position of the tokenizer in the input.\n if (startPos) {\n this.pos = startPos\n this.lineStart = this.input.lastIndexOf(\"\\n\", startPos - 1) + 1\n this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length\n } else {\n this.pos = this.lineStart = 0\n this.curLine = 1\n }\n\n // Properties of the current token:\n // Its type\n this.type = tt.eof\n // For tokens that include more information than their type, the value\n this.value = null\n // Its start and end offset\n this.start = this.end = this.pos\n // And, if locations are used, the {line, column} object\n // corresponding to those offsets\n this.startLoc = this.endLoc = this.curPosition()\n\n // Position information for the previous token\n this.lastTokEndLoc = this.lastTokStartLoc = null\n this.lastTokStart = this.lastTokEnd = this.pos\n\n // The context stack is used to superficially track syntactic\n // context to predict whether a regular expression is allowed in a\n // given position.\n this.context = this.initialContext()\n this.exprAllowed = true\n\n // Figure out if it's a module code.\n this.inModule = options.sourceType === \"module\"\n this.strict = this.inModule || this.strictDirective(this.pos)\n\n // Used to signify the start of a potential arrow function\n this.potentialArrowAt = -1\n\n // Positions to delayed-check that yield/await does not exist in default parameters.\n this.yieldPos = this.awaitPos = 0\n // Labels in scope.\n this.labels = []\n\n // If enabled, skip leading hashbang line.\n if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === \"#!\")\n this.skipLineComment(2)\n\n // Scope tracking for duplicate variable names (see scope.js)\n this.scopeStack = []\n this.enterScope(SCOPE_TOP)\n\n // For RegExp validation\n this.regexpState = null\n }\n\n parse() {\n let node = this.options.program || this.startNode()\n this.nextToken()\n return this.parseTopLevel(node)\n }\n\n get inFunction() { return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0 }\n get inGenerator() { return (this.currentVarScope().flags & SCOPE_GENERATOR) > 0 }\n get inAsync() { return (this.currentVarScope().flags & SCOPE_ASYNC) > 0 }\n\n static extend(...plugins) {\n let cls = this\n for (let i = 0; i < plugins.length; i++) cls = plugins[i](cls)\n return cls\n }\n\n static parse(input, options) {\n return new this(options, input).parse()\n }\n\n static parseExpressionAt(input, pos, options) {\n let parser = new this(options, input, pos)\n parser.nextToken()\n return parser.parseExpression()\n }\n\n static tokenizer(input, options) {\n return new this(options, input)\n }\n}\n","import {types as tt} from \"./tokentype\"\nimport {Parser} from \"./state\"\nimport {lineBreak, skipWhiteSpace} from \"./whitespace\"\n\nconst pp = Parser.prototype\n\n// ## Parser utilities\n\nconst literal = /^(?:'((?:\\\\.|[^'])*?)'|\"((?:\\\\.|[^\"])*?)\"|;)/\npp.strictDirective = function(start) {\n for (;;) {\n skipWhiteSpace.lastIndex = start\n start += skipWhiteSpace.exec(this.input)[0].length\n let match = literal.exec(this.input.slice(start))\n if (!match) return false\n if ((match[1] || match[2]) === \"use strict\") return true\n start += match[0].length\n }\n}\n\n// Predicate that tests whether the next token is of the given\n// type, and if yes, consumes it as a side effect.\n\npp.eat = function(type) {\n if (this.type === type) {\n this.next()\n return true\n } else {\n return false\n }\n}\n\n// Tests whether parsed token is a contextual keyword.\n\npp.isContextual = function(name) {\n return this.type === tt.name && this.value === name && !this.containsEsc\n}\n\n// Consumes contextual keyword if possible.\n\npp.eatContextual = function(name) {\n if (!this.isContextual(name)) return false\n this.next()\n return true\n}\n\n// Asserts that following token is given contextual keyword.\n\npp.expectContextual = function(name) {\n if (!this.eatContextual(name)) this.unexpected()\n}\n\n// Test whether a semicolon can be inserted at the current position.\n\npp.canInsertSemicolon = function() {\n return this.type === tt.eof ||\n this.type === tt.braceR ||\n lineBreak.test(this.input.slice(this.lastTokEnd, this.start))\n}\n\npp.insertSemicolon = function() {\n if (this.canInsertSemicolon()) {\n if (this.options.onInsertedSemicolon)\n this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc)\n return true\n }\n}\n\n// Consume a semicolon, or, failing that, see if we are allowed to\n// pretend that there is a semicolon at this position.\n\npp.semicolon = function() {\n if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected()\n}\n\npp.afterTrailingComma = function(tokType, notNext) {\n if (this.type === tokType) {\n if (this.options.onTrailingComma)\n this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc)\n if (!notNext)\n this.next()\n return true\n }\n}\n\n// Expect a token of a given type. If found, consume it, otherwise,\n// raise an unexpected token error.\n\npp.expect = function(type) {\n this.eat(type) || this.unexpected()\n}\n\n// Raise an unexpected token error.\n\npp.unexpected = function(pos) {\n this.raise(pos != null ? pos : this.start, \"Unexpected token\")\n}\n\nexport function DestructuringErrors() {\n this.shorthandAssign =\n this.trailingComma =\n this.parenthesizedAssign =\n this.parenthesizedBind =\n this.doubleProto =\n -1\n}\n\npp.checkPatternErrors = function(refDestructuringErrors, isAssign) {\n if (!refDestructuringErrors) return\n if (refDestructuringErrors.trailingComma > -1)\n this.raiseRecoverable(refDestructuringErrors.trailingComma, \"Comma is not permitted after the rest element\")\n let parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind\n if (parens > -1) this.raiseRecoverable(parens, \"Parenthesized pattern\")\n}\n\npp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {\n if (!refDestructuringErrors) return false\n let {shorthandAssign, doubleProto} = refDestructuringErrors\n if (!andThrow) return shorthandAssign >= 0 || doubleProto >= 0\n if (shorthandAssign >= 0)\n this.raise(shorthandAssign, \"Shorthand property assignments are valid only in destructuring patterns\")\n if (doubleProto >= 0)\n this.raiseRecoverable(doubleProto, \"Redefinition of __proto__ property\")\n}\n\npp.checkYieldAwaitInDefaultParams = function() {\n if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))\n this.raise(this.yieldPos, \"Yield expression cannot be a default value\")\n if (this.awaitPos)\n this.raise(this.awaitPos, \"Await expression cannot be a default value\")\n}\n\npp.isSimpleAssignTarget = function(expr) {\n if (expr.type === \"ParenthesizedExpression\")\n return this.isSimpleAssignTarget(expr.expression)\n return expr.type === \"Identifier\" || expr.type === \"MemberExpression\"\n}\n","import {types as tt} from \"./tokentype\"\nimport {Parser} from \"./state\"\nimport {lineBreak, skipWhiteSpace} from \"./whitespace\"\nimport {isIdentifierStart, isIdentifierChar, keywordRelationalOperator} from \"./identifier\"\nimport {has} from \"./util\"\nimport {DestructuringErrors} from \"./parseutil\"\nimport {functionFlags, SCOPE_SIMPLE_CATCH, BIND_SIMPLE_CATCH, BIND_LEXICAL, BIND_VAR, BIND_FUNCTION} from \"./scopeflags\"\n\nconst pp = Parser.prototype\n\n// ### Statement parsing\n\n// Parse a program. Initializes the parser, reads any number of\n// statements, and wraps them in a Program node. Optionally takes a\n// `program` argument. If present, the statements will be appended\n// to its body instead of creating a new node.\n\npp.parseTopLevel = function(node) {\n let exports = {}\n if (!node.body) node.body = []\n while (this.type !== tt.eof) {\n let stmt = this.parseStatement(null, true, exports)\n node.body.push(stmt)\n }\n this.adaptDirectivePrologue(node.body)\n this.next()\n if (this.options.ecmaVersion >= 6) {\n node.sourceType = this.options.sourceType\n }\n return this.finishNode(node, \"Program\")\n}\n\nconst loopLabel = {kind: \"loop\"}, switchLabel = {kind: \"switch\"}\n\npp.isLet = function() {\n if (this.options.ecmaVersion < 6 || !this.isContextual(\"let\")) return false\n skipWhiteSpace.lastIndex = this.pos\n let skip = skipWhiteSpace.exec(this.input)\n let next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)\n if (nextCh === 91 || nextCh === 123) return true // '{' and '['\n if (isIdentifierStart(nextCh, true)) {\n let pos = next + 1\n while (isIdentifierChar(this.input.charCodeAt(pos), true)) ++pos\n let ident = this.input.slice(next, pos)\n if (!keywordRelationalOperator.test(ident)) return true\n }\n return false\n}\n\n// check 'async [no LineTerminator here] function'\n// - 'async /*foo*/ function' is OK.\n// - 'async /*\\n*/ function' is invalid.\npp.isAsyncFunction = function() {\n if (this.options.ecmaVersion < 8 || !this.isContextual(\"async\"))\n return false\n\n skipWhiteSpace.lastIndex = this.pos\n let skip = skipWhiteSpace.exec(this.input)\n let next = this.pos + skip[0].length\n return !lineBreak.test(this.input.slice(this.pos, next)) &&\n this.input.slice(next, next + 8) === \"function\" &&\n (next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))\n}\n\n// Parse a single statement.\n//\n// If expecting a statement and finding a slash operator, parse a\n// regular expression literal. This is to handle cases like\n// `if (foo) /blah/.exec(foo)`, where looking at the previous token\n// does not help.\n\npp.parseStatement = function(context, topLevel, exports) {\n let starttype = this.type, node = this.startNode(), kind\n\n if (this.isLet()) {\n starttype = tt._var\n kind = \"let\"\n }\n\n // Most types of statements are recognized by the keyword they\n // start with. Many are trivial to parse, some require a bit of\n // complexity.\n\n switch (starttype) {\n case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)\n case tt._debugger: return this.parseDebuggerStatement(node)\n case tt._do: return this.parseDoStatement(node)\n case tt._for: return this.parseForStatement(node)\n case tt._function:\n if ((context && (this.strict || context !== \"if\")) && this.options.ecmaVersion >= 6) this.unexpected()\n return this.parseFunctionStatement(node, false, !context)\n case tt._class:\n if (context) this.unexpected()\n return this.parseClass(node, true)\n case tt._if: return this.parseIfStatement(node)\n case tt._return: return this.parseReturnStatement(node)\n case tt._switch: return this.parseSwitchStatement(node)\n case tt._throw: return this.parseThrowStatement(node)\n case tt._try: return this.parseTryStatement(node)\n case tt._const: case tt._var:\n kind = kind || this.value\n if (context && kind !== \"var\") this.unexpected()\n return this.parseVarStatement(node, kind)\n case tt._while: return this.parseWhileStatement(node)\n case tt._with: return this.parseWithStatement(node)\n case tt.braceL: return this.parseBlock(true, node)\n case tt.semi: return this.parseEmptyStatement(node)\n case tt._export:\n case tt._import:\n if (!this.options.allowImportExportEverywhere) {\n if (!topLevel)\n this.raise(this.start, \"'import' and 'export' may only appear at the top level\")\n if (!this.inModule)\n this.raise(this.start, \"'import' and 'export' may appear only with 'sourceType: module'\")\n }\n return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)\n\n // If the statement does not start with a statement keyword or a\n // brace, it's an ExpressionStatement or LabeledStatement. We\n // simply start parsing an expression, and afterwards, if the\n // next token is a colon and the expression was a simple\n // Identifier node, we switch to interpreting it as a label.\n default:\n if (this.isAsyncFunction()) {\n if (context) this.unexpected()\n this.next()\n return this.parseFunctionStatement(node, true, !context)\n }\n\n let maybeName = this.value, expr = this.parseExpression()\n if (starttype === tt.name && expr.type === \"Identifier\" && this.eat(tt.colon))\n return this.parseLabeledStatement(node, maybeName, expr, context)\n else return this.parseExpressionStatement(node, expr)\n }\n}\n\npp.parseBreakContinueStatement = function(node, keyword) {\n let isBreak = keyword === \"break\"\n this.next()\n if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null\n else if (this.type !== tt.name) this.unexpected()\n else {\n node.label = this.parseIdent()\n this.semicolon()\n }\n\n // Verify that there is an actual destination to break or\n // continue to.\n let i = 0\n for (; i < this.labels.length; ++i) {\n let lab = this.labels[i]\n if (node.label == null || lab.name === node.label.name) {\n if (lab.kind != null && (isBreak || lab.kind === \"loop\")) break\n if (node.label && isBreak) break\n }\n }\n if (i === this.labels.length) this.raise(node.start, \"Unsyntactic \" + keyword)\n return this.finishNode(node, isBreak ? \"BreakStatement\" : \"ContinueStatement\")\n}\n\npp.parseDebuggerStatement = function(node) {\n this.next()\n this.semicolon()\n return this.finishNode(node, \"DebuggerStatement\")\n}\n\npp.parseDoStatement = function(node) {\n this.next()\n this.labels.push(loopLabel)\n node.body = this.parseStatement(\"do\")\n this.labels.pop()\n this.expect(tt._while)\n node.test = this.parseParenExpression()\n if (this.options.ecmaVersion >= 6)\n this.eat(tt.semi)\n else\n this.semicolon()\n return this.finishNode(node, \"DoWhileStatement\")\n}\n\n// Disambiguating between a `for` and a `for`/`in` or `for`/`of`\n// loop is non-trivial. Basically, we have to parse the init `var`\n// statement or expression, disallowing the `in` operator (see\n// the second parameter to `parseExpression`), and then check\n// whether the next token is `in` or `of`. When there is no init\n// part (semicolon immediately after the opening parenthesis), it\n// is a regular `for` loop.\n\npp.parseForStatement = function(node) {\n this.next()\n let awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual(\"await\")) ? this.lastTokStart : -1\n this.labels.push(loopLabel)\n this.enterScope(0)\n this.expect(tt.parenL)\n if (this.type === tt.semi) {\n if (awaitAt > -1) this.unexpected(awaitAt)\n return this.parseFor(node, null)\n }\n let isLet = this.isLet()\n if (this.type === tt._var || this.type === tt._const || isLet) {\n let init = this.startNode(), kind = isLet ? \"let\" : this.value\n this.next()\n this.parseVar(init, true, kind)\n this.finishNode(init, \"VariableDeclaration\")\n if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual(\"of\"))) && init.declarations.length === 1 &&\n !(kind !== \"var\" && init.declarations[0].init)) {\n if (this.options.ecmaVersion >= 9) {\n if (this.type === tt._in) {\n if (awaitAt > -1) this.unexpected(awaitAt)\n } else node.await = awaitAt > -1\n }\n return this.parseForIn(node, init)\n }\n if (awaitAt > -1) this.unexpected(awaitAt)\n return this.parseFor(node, init)\n }\n let refDestructuringErrors = new DestructuringErrors\n let init = this.parseExpression(true, refDestructuringErrors)\n if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual(\"of\"))) {\n if (this.options.ecmaVersion >= 9) {\n if (this.type === tt._in) {\n if (awaitAt > -1) this.unexpected(awaitAt)\n } else node.await = awaitAt > -1\n }\n this.toAssignable(init, false, refDestructuringErrors)\n this.checkLVal(init)\n return this.parseForIn(node, init)\n } else {\n this.checkExpressionErrors(refDestructuringErrors, true)\n }\n if (awaitAt > -1) this.unexpected(awaitAt)\n return this.parseFor(node, init)\n}\n\npp.parseFunctionStatement = function(node, isAsync, declarationPosition) {\n this.next()\n return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), false, isAsync)\n}\n\npp.parseIfStatement = function(node) {\n this.next()\n node.test = this.parseParenExpression()\n // allow function declarations in branches, but only in non-strict mode\n node.consequent = this.parseStatement(\"if\")\n node.alternate = this.eat(tt._else) ? this.parseStatement(\"if\") : null\n return this.finishNode(node, \"IfStatement\")\n}\n\npp.parseReturnStatement = function(node) {\n if (!this.inFunction && !this.options.allowReturnOutsideFunction)\n this.raise(this.start, \"'return' outside of function\")\n this.next()\n\n // In `return` (and `break`/`continue`), the keywords with\n // optional arguments, we eagerly look for a semicolon or the\n // possibility to insert one.\n\n if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null\n else { node.argument = this.parseExpression(); this.semicolon() }\n return this.finishNode(node, \"ReturnStatement\")\n}\n\npp.parseSwitchStatement = function(node) {\n this.next()\n node.discriminant = this.parseParenExpression()\n node.cases = []\n this.expect(tt.braceL)\n this.labels.push(switchLabel)\n this.enterScope(0)\n\n // Statements under must be grouped (by label) in SwitchCase\n // nodes. `cur` is used to keep the node that we are currently\n // adding statements to.\n\n let cur\n for (let sawDefault = false; this.type !== tt.braceR;) {\n if (this.type === tt._case || this.type === tt._default) {\n let isCase = this.type === tt._case\n if (cur) this.finishNode(cur, \"SwitchCase\")\n node.cases.push(cur = this.startNode())\n cur.consequent = []\n this.next()\n if (isCase) {\n cur.test = this.parseExpression()\n } else {\n if (sawDefault) this.raiseRecoverable(this.lastTokStart, \"Multiple default clauses\")\n sawDefault = true\n cur.test = null\n }\n this.expect(tt.colon)\n } else {\n if (!cur) this.unexpected()\n cur.consequent.push(this.parseStatement(null))\n }\n }\n this.exitScope()\n if (cur) this.finishNode(cur, \"SwitchCase\")\n this.next() // Closing brace\n this.labels.pop()\n return this.finishNode(node, \"SwitchStatement\")\n}\n\npp.parseThrowStatement = function(node) {\n this.next()\n if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))\n this.raise(this.lastTokEnd, \"Illegal newline after throw\")\n node.argument = this.parseExpression()\n this.semicolon()\n return this.finishNode(node, \"ThrowStatement\")\n}\n\n// Reused empty array added for node fields that are always empty.\n\nconst empty = []\n\npp.parseTryStatement = function(node) {\n this.next()\n node.block = this.parseBlock()\n node.handler = null\n if (this.type === tt._catch) {\n let clause = this.startNode()\n this.next()\n if (this.eat(tt.parenL)) {\n clause.param = this.parseBindingAtom()\n let simple = clause.param.type === \"Identifier\"\n this.enterScope(simple ? SCOPE_SIMPLE_CATCH : 0)\n this.checkLVal(clause.param, simple ? BIND_SIMPLE_CATCH : BIND_LEXICAL)\n this.expect(tt.parenR)\n } else {\n if (this.options.ecmaVersion < 10) this.unexpected()\n clause.param = null\n this.enterScope(0)\n }\n clause.body = this.parseBlock(false)\n this.exitScope()\n node.handler = this.finishNode(clause, \"CatchClause\")\n }\n node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null\n if (!node.handler && !node.finalizer)\n this.raise(node.start, \"Missing catch or finally clause\")\n return this.finishNode(node, \"TryStatement\")\n}\n\npp.parseVarStatement = function(node, kind) {\n this.next()\n this.parseVar(node, false, kind)\n this.semicolon()\n return this.finishNode(node, \"VariableDeclaration\")\n}\n\npp.parseWhileStatement = function(node) {\n this.next()\n node.test = this.parseParenExpression()\n this.labels.push(loopLabel)\n node.body = this.parseStatement(\"while\")\n this.labels.pop()\n return this.finishNode(node, \"WhileStatement\")\n}\n\npp.parseWithStatement = function(node) {\n if (this.strict) this.raise(this.start, \"'with' in strict mode\")\n this.next()\n node.object = this.parseParenExpression()\n node.body = this.parseStatement(\"with\")\n return this.finishNode(node, \"WithStatement\")\n}\n\npp.parseEmptyStatement = function(node) {\n this.next()\n return this.finishNode(node, \"EmptyStatement\")\n}\n\npp.parseLabeledStatement = function(node, maybeName, expr, context) {\n for (let label of this.labels)\n if (label.name === maybeName)\n this.raise(expr.start, \"Label '\" + maybeName + \"' is already declared\")\n let kind = this.type.isLoop ? \"loop\" : this.type === tt._switch ? \"switch\" : null\n for (let i = this.labels.length - 1; i >= 0; i--) {\n let label = this.labels[i]\n if (label.statementStart === node.start) {\n // Update information about previous labels on this node\n label.statementStart = this.start\n label.kind = kind\n } else break\n }\n this.labels.push({name: maybeName, kind, statementStart: this.start})\n node.body = this.parseStatement(context)\n if (node.body.type === \"ClassDeclaration\" ||\n node.body.type === \"VariableDeclaration\" && node.body.kind !== \"var\" ||\n node.body.type === \"FunctionDeclaration\" && (this.strict || node.body.generator || node.body.async))\n this.raiseRecoverable(node.body.start, \"Invalid labeled declaration\")\n this.labels.pop()\n node.label = expr\n return this.finishNode(node, \"LabeledStatement\")\n}\n\npp.parseExpressionStatement = function(node, expr) {\n node.expression = expr\n this.semicolon()\n return this.finishNode(node, \"ExpressionStatement\")\n}\n\n// Parse a semicolon-enclosed block of statements, handling `\"use\n// strict\"` declarations when `allowStrict` is true (used for\n// function bodies).\n\npp.parseBlock = function(createNewLexicalScope = true, node = this.startNode()) {\n node.body = []\n this.expect(tt.braceL)\n if (createNewLexicalScope) this.enterScope(0)\n while (!this.eat(tt.braceR)) {\n let stmt = this.parseStatement(null)\n node.body.push(stmt)\n }\n if (createNewLexicalScope) this.exitScope()\n return this.finishNode(node, \"BlockStatement\")\n}\n\n// Parse a regular `for` loop. The disambiguation code in\n// `parseStatement` will already have parsed the init statement or\n// expression.\n\npp.parseFor = function(node, init) {\n node.init = init\n this.expect(tt.semi)\n node.test = this.type === tt.semi ? null : this.parseExpression()\n this.expect(tt.semi)\n node.update = this.type === tt.parenR ? null : this.parseExpression()\n this.expect(tt.parenR)\n this.exitScope()\n node.body = this.parseStatement(\"for\")\n this.labels.pop()\n return this.finishNode(node, \"ForStatement\")\n}\n\n// Parse a `for`/`in` and `for`/`of` loop, which are almost\n// same from parser's perspective.\n\npp.parseForIn = function(node, init) {\n let type = this.type === tt._in ? \"ForInStatement\" : \"ForOfStatement\"\n this.next()\n if (type === \"ForInStatement\") {\n if (init.type === \"AssignmentPattern\" ||\n (init.type === \"VariableDeclaration\" && init.declarations[0].init != null &&\n (this.strict || init.declarations[0].id.type !== \"Identifier\")))\n this.raise(init.start, \"Invalid assignment in for-in loop head\")\n }\n node.left = init\n node.right = type === \"ForInStatement\" ? this.parseExpression() : this.parseMaybeAssign()\n this.expect(tt.parenR)\n this.exitScope()\n node.body = this.parseStatement(\"for\")\n this.labels.pop()\n return this.finishNode(node, type)\n}\n\n// Parse a list of variable declarations.\n\npp.parseVar = function(node, isFor, kind) {\n node.declarations = []\n node.kind = kind\n for (;;) {\n let decl = this.startNode()\n this.parseVarId(decl, kind)\n if (this.eat(tt.eq)) {\n decl.init = this.parseMaybeAssign(isFor)\n } else if (kind === \"const\" && !(this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual(\"of\")))) {\n this.unexpected()\n } else if (decl.id.type !== \"Identifier\" && !(isFor && (this.type === tt._in || this.isContextual(\"of\")))) {\n this.raise(this.lastTokEnd, \"Complex binding patterns require an initialization value\")\n } else {\n decl.init = null\n }\n node.declarations.push(this.finishNode(decl, \"VariableDeclarator\"))\n if (!this.eat(tt.comma)) break\n }\n return node\n}\n\npp.parseVarId = function(decl, kind) {\n decl.id = this.parseBindingAtom(kind)\n this.checkLVal(decl.id, kind === \"var\" ? BIND_VAR : BIND_LEXICAL, false)\n}\n\nconst FUNC_STATEMENT = 1, FUNC_HANGING_STATEMENT = 2, FUNC_NULLABLE_ID = 4\n\n// Parse a function declaration or literal (depending on the\n// `isStatement` parameter).\n\npp.parseFunction = function(node, statement, allowExpressionBody, isAsync) {\n this.initFunction(node)\n if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync)\n node.generator = this.eat(tt.star)\n if (this.options.ecmaVersion >= 8)\n node.async = !!isAsync\n\n if (statement & FUNC_STATEMENT) {\n node.id = (statement & FUNC_NULLABLE_ID) && this.type !== tt.name ? null : this.parseIdent()\n if (node.id && !(statement & FUNC_HANGING_STATEMENT))\n this.checkLVal(node.id, this.inModule && !this.inFunction ? BIND_LEXICAL : BIND_FUNCTION)\n }\n\n let oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos\n this.yieldPos = 0\n this.awaitPos = 0\n this.enterScope(functionFlags(node.async, node.generator))\n\n if (!(statement & FUNC_STATEMENT))\n node.id = this.type === tt.name ? this.parseIdent() : null\n\n this.parseFunctionParams(node)\n this.parseFunctionBody(node, allowExpressionBody)\n\n this.yieldPos = oldYieldPos\n this.awaitPos = oldAwaitPos\n return this.finishNode(node, (statement & FUNC_STATEMENT) ? \"FunctionDeclaration\" : \"FunctionExpression\")\n}\n\npp.parseFunctionParams = function(node) {\n this.expect(tt.parenL)\n node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8)\n this.checkYieldAwaitInDefaultParams()\n}\n\n// Parse a class declaration or literal (depending on the\n// `isStatement` parameter).\n\npp.parseClass = function(node, isStatement) {\n this.next()\n\n this.parseClassId(node, isStatement)\n this.parseClassSuper(node)\n let classBody = this.startNode()\n let hadConstructor = false\n classBody.body = []\n this.expect(tt.braceL)\n while (!this.eat(tt.braceR)) {\n const element = this.parseClassElement()\n if (element) {\n classBody.body.push(element)\n if (element.type === \"MethodDefinition\" && element.kind === \"constructor\") {\n if (hadConstructor) this.raise(element.start, \"Duplicate constructor in the same class\")\n hadConstructor = true\n }\n }\n }\n node.body = this.finishNode(classBody, \"ClassBody\")\n return this.finishNode(node, isStatement ? \"ClassDeclaration\" : \"ClassExpression\")\n}\n\npp.parseClassElement = function() {\n if (this.eat(tt.semi)) return null\n\n let method = this.startNode()\n const tryContextual = (k, noLineBreak = false) => {\n const start = this.start, startLoc = this.startLoc\n if (!this.eatContextual(k)) return false\n if (this.type !== tt.parenL && (!noLineBreak || !this.canInsertSemicolon())) return true\n if (method.key) this.unexpected()\n method.computed = false\n method.key = this.startNodeAt(start, startLoc)\n method.key.name = k\n this.finishNode(method.key, \"Identifier\")\n return false\n }\n\n method.kind = \"method\"\n method.static = tryContextual(\"static\")\n let isGenerator = this.eat(tt.star)\n let isAsync = false\n if (!isGenerator) {\n if (this.options.ecmaVersion >= 8 && tryContextual(\"async\", true)) {\n isAsync = true\n isGenerator = this.options.ecmaVersion >= 9 && this.eat(tt.star)\n } else if (tryContextual(\"get\")) {\n method.kind = \"get\"\n } else if (tryContextual(\"set\")) {\n method.kind = \"set\"\n }\n }\n if (!method.key) this.parsePropertyName(method)\n let {key} = method\n if (!method.computed && !method.static && (key.type === \"Identifier\" && key.name === \"constructor\" ||\n key.type === \"Literal\" && key.value === \"constructor\")) {\n if (method.kind !== \"method\") this.raise(key.start, \"Constructor can't have get/set modifier\")\n if (isGenerator) this.raise(key.start, \"Constructor can't be a generator\")\n if (isAsync) this.raise(key.start, \"Constructor can't be an async method\")\n method.kind = \"constructor\"\n } else if (method.static && key.type === \"Identifier\" && key.name === \"prototype\") {\n this.raise(key.start, \"Classes may not have a static property named prototype\")\n }\n this.parseClassMethod(method, isGenerator, isAsync)\n if (method.kind === \"get\" && method.value.params.length !== 0)\n this.raiseRecoverable(method.value.start, \"getter should have no params\")\n if (method.kind === \"set\" && method.value.params.length !== 1)\n this.raiseRecoverable(method.value.start, \"setter should have exactly one param\")\n if (method.kind === \"set\" && method.value.params[0].type === \"RestElement\")\n this.raiseRecoverable(method.value.params[0].start, \"Setter cannot use rest params\")\n return method\n}\n\npp.parseClassMethod = function(method, isGenerator, isAsync) {\n method.value = this.parseMethod(isGenerator, isAsync)\n return this.finishNode(method, \"MethodDefinition\")\n}\n\npp.parseClassId = function(node, isStatement) {\n node.id = this.type === tt.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null\n}\n\npp.parseClassSuper = function(node) {\n node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null\n}\n\n// Parses module export declaration.\n\npp.parseExport = function(node, exports) {\n this.next()\n // export * from '...'\n if (this.eat(tt.star)) {\n this.expectContextual(\"from\")\n if (this.type !== tt.string) this.unexpected()\n node.source = this.parseExprAtom()\n this.semicolon()\n return this.finishNode(node, \"ExportAllDeclaration\")\n }\n if (this.eat(tt._default)) { // export default ...\n this.checkExport(exports, \"default\", this.lastTokStart)\n let isAsync\n if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {\n let fNode = this.startNode()\n this.next()\n if (isAsync) this.next()\n node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync, true)\n } else if (this.type === tt._class) {\n let cNode = this.startNode()\n node.declaration = this.parseClass(cNode, \"nullableID\")\n } else {\n node.declaration = this.parseMaybeAssign()\n this.semicolon()\n }\n return this.finishNode(node, \"ExportDefaultDeclaration\")\n }\n // export var|const|let|function|class ...\n if (this.shouldParseExportStatement()) {\n node.declaration = this.parseStatement(null)\n if (node.declaration.type === \"VariableDeclaration\")\n this.checkVariableExport(exports, node.declaration.declarations)\n else\n this.checkExport(exports, node.declaration.id.name, node.declaration.id.start)\n node.specifiers = []\n node.source = null\n } else { // export { x, y as z } [from '...']\n node.declaration = null\n node.specifiers = this.parseExportSpecifiers(exports)\n if (this.eatContextual(\"from\")) {\n if (this.type !== tt.string) this.unexpected()\n node.source = this.parseExprAtom()\n } else {\n // check for keywords used as local names\n for (let spec of node.specifiers) {\n this.checkUnreserved(spec.local)\n }\n\n node.source = null\n }\n this.semicolon()\n }\n return this.finishNode(node, \"ExportNamedDeclaration\")\n}\n\npp.checkExport = function(exports, name, pos) {\n if (!exports) return\n if (has(exports, name))\n this.raiseRecoverable(pos, \"Duplicate export '\" + name + \"'\")\n exports[name] = true\n}\n\npp.checkPatternExport = function(exports, pat) {\n let type = pat.type\n if (type === \"Identifier\")\n this.checkExport(exports, pat.name, pat.start)\n else if (type === \"ObjectPattern\")\n for (let prop of pat.properties)\n this.checkPatternExport(exports, prop)\n else if (type === \"ArrayPattern\")\n for (let elt of pat.elements) {\n if (elt) this.checkPatternExport(exports, elt)\n }\n else if (type === \"Property\")\n this.checkPatternExport(exports, pat.value)\n else if (type === \"AssignmentPattern\")\n this.checkPatternExport(exports, pat.left)\n else if (type === \"RestElement\")\n this.checkPatternExport(exports, pat.argument)\n else if (type === \"ParenthesizedExpression\")\n this.checkPatternExport(exports, pat.expression)\n}\n\npp.checkVariableExport = function(exports, decls) {\n if (!exports) return\n for (let decl of decls)\n this.checkPatternExport(exports, decl.id)\n}\n\npp.shouldParseExportStatement = function() {\n return this.type.keyword === \"var\" ||\n this.type.keyword === \"const\" ||\n this.type.keyword === \"class\" ||\n this.type.keyword === \"function\" ||\n this.isLet() ||\n this.isAsyncFunction()\n}\n\n// Parses a comma-separated list of module exports.\n\npp.parseExportSpecifiers = function(exports) {\n let nodes = [], first = true\n // export { x, y as z } [from '...']\n this.expect(tt.braceL)\n while (!this.eat(tt.braceR)) {\n if (!first) {\n this.expect(tt.comma)\n if (this.afterTrailingComma(tt.braceR)) break\n } else first = false\n\n let node = this.startNode()\n node.local = this.parseIdent(true)\n node.exported = this.eatContextual(\"as\") ? this.parseIdent(true) : node.local\n this.checkExport(exports, node.exported.name, node.exported.start)\n nodes.push(this.finishNode(node, \"ExportSpecifier\"))\n }\n return nodes\n}\n\n// Parses import declaration.\n\npp.parseImport = function(node) {\n this.next()\n // import '...'\n if (this.type === tt.string) {\n node.specifiers = empty\n node.source = this.parseExprAtom()\n } else {\n node.specifiers = this.parseImportSpecifiers()\n this.expectContextual(\"from\")\n node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()\n }\n this.semicolon()\n return this.finishNode(node, \"ImportDeclaration\")\n}\n\n// Parses a comma-separated list of module imports.\n\npp.parseImportSpecifiers = function() {\n let nodes = [], first = true\n if (this.type === tt.name) {\n // import defaultObj, { x, y as z } from '...'\n let node = this.startNode()\n node.local = this.parseIdent()\n this.checkLVal(node.local, BIND_LEXICAL)\n nodes.push(this.finishNode(node, \"ImportDefaultSpecifier\"))\n if (!this.eat(tt.comma)) return nodes\n }\n if (this.type === tt.star) {\n let node = this.startNode()\n this.next()\n this.expectContextual(\"as\")\n node.local = this.parseIdent()\n this.checkLVal(node.local, BIND_LEXICAL)\n nodes.push(this.finishNode(node, \"ImportNamespaceSpecifier\"))\n return nodes\n }\n this.expect(tt.braceL)\n while (!this.eat(tt.braceR)) {\n if (!first) {\n this.expect(tt.comma)\n if (this.afterTrailingComma(tt.braceR)) break\n } else first = false\n\n let node = this.startNode()\n node.imported = this.parseIdent(true)\n if (this.eatContextual(\"as\")) {\n node.local = this.parseIdent()\n } else {\n this.checkUnreserved(node.imported)\n node.local = node.imported\n }\n this.checkLVal(node.local, BIND_LEXICAL)\n nodes.push(this.finishNode(node, \"ImportSpecifier\"))\n }\n return nodes\n}\n\n// Set `ExpressionStatement#directive` property for directive prologues.\npp.adaptDirectivePrologue = function(statements) {\n for (let i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {\n statements[i].directive = statements[i].expression.raw.slice(1, -1)\n }\n}\npp.isDirectiveCandidate = function(statement) {\n return (\n statement.type === \"ExpressionStatement\" &&\n statement.expression.type === \"Literal\" &&\n typeof statement.expression.value === \"string\" &&\n // Reject parenthesized strings.\n (this.input[statement.start] === \"\\\"\" || this.input[statement.start] === \"'\")\n )\n}\n","import {types as tt} from \"./tokentype\"\nimport {Parser} from \"./state\"\nimport {has} from \"./util\"\nimport {BIND_NONE, BIND_OUTSIDE} from \"./scopeflags\"\n\nconst pp = Parser.prototype\n\n// Convert existing expression atom to assignable pattern\n// if possible.\n\npp.toAssignable = function(node, isBinding, refDestructuringErrors) {\n if (this.options.ecmaVersion >= 6 && node) {\n switch (node.type) {\n case \"Identifier\":\n if (this.inAsync && node.name === \"await\")\n this.raise(node.start, \"Can not use 'await' as identifier inside an async function\")\n break\n\n case \"ObjectPattern\":\n case \"ArrayPattern\":\n case \"RestElement\":\n break\n\n case \"ObjectExpression\":\n node.type = \"ObjectPattern\"\n if (refDestructuringErrors) this.checkPatternErrors(refDestructuringErrors, true)\n for (let prop of node.properties) {\n this.toAssignable(prop, isBinding)\n // Early error:\n // AssignmentRestProperty[Yield, Await] :\n // `...` DestructuringAssignmentTarget[Yield, Await]\n //\n // It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.\n if (\n prop.type === \"RestElement\" &&\n (prop.argument.type === \"ArrayPattern\" || prop.argument.type === \"ObjectPattern\")\n ) {\n this.raise(prop.argument.start, \"Unexpected token\")\n }\n }\n break\n\n case \"Property\":\n // AssignmentProperty has type === \"Property\"\n if (node.kind !== \"init\") this.raise(node.key.start, \"Object pattern can't contain getter or setter\")\n this.toAssignable(node.value, isBinding)\n break\n\n case \"ArrayExpression\":\n node.type = \"ArrayPattern\"\n if (refDestructuringErrors) this.checkPatternErrors(refDestructuringErrors, true)\n this.toAssignableList(node.elements, isBinding)\n break\n\n case \"SpreadElement\":\n node.type = \"RestElement\"\n this.toAssignable(node.argument, isBinding)\n if (node.argument.type === \"AssignmentPattern\")\n this.raise(node.argument.start, \"Rest elements cannot have a default value\")\n break\n\n case \"AssignmentExpression\":\n if (node.operator !== \"=\") this.raise(node.left.end, \"Only '=' operator can be used for specifying default value.\")\n node.type = \"AssignmentPattern\"\n delete node.operator\n this.toAssignable(node.left, isBinding)\n // falls through to AssignmentPattern\n\n case \"AssignmentPattern\":\n break\n\n case \"ParenthesizedExpression\":\n this.toAssignable(node.expression, isBinding)\n break\n\n case \"MemberExpression\":\n if (!isBinding) break\n\n default:\n this.raise(node.start, \"Assigning to rvalue\")\n }\n } else if (refDestructuringErrors) this.checkPatternErrors(refDestructuringErrors, true)\n return node\n}\n\n// Convert list of expression atoms to binding list.\n\npp.toAssignableList = function(exprList, isBinding) {\n let end = exprList.length\n for (let i = 0; i < end; i++) {\n let elt = exprList[i]\n if (elt) this.toAssignable(elt, isBinding)\n }\n if (end) {\n let last = exprList[end - 1]\n if (this.options.ecmaVersion === 6 && isBinding && last && last.type === \"RestElement\" && last.argument.type !== \"Identifier\")\n this.unexpected(last.argument.start)\n }\n return exprList\n}\n\n// Parses spread element.\n\npp.parseSpread = function(refDestructuringErrors) {\n let node = this.startNode()\n this.next()\n node.argument = this.parseMaybeAssign(false, refDestructuringErrors)\n return this.finishNode(node, \"SpreadElement\")\n}\n\npp.parseRestBinding = function() {\n let node = this.startNode()\n this.next()\n\n // RestElement inside of a function parameter must be an identifier\n if (this.options.ecmaVersion === 6 && this.type !== tt.name)\n this.unexpected()\n\n node.argument = this.parseBindingAtom()\n\n return this.finishNode(node, \"RestElement\")\n}\n\n// Parses lvalue (assignable) atom.\n\npp.parseBindingAtom = function() {\n if (this.options.ecmaVersion >= 6) {\n switch (this.type) {\n case tt.bracketL:\n let node = this.startNode()\n this.next()\n node.elements = this.parseBindingList(tt.bracketR, true, true)\n return this.finishNode(node, \"ArrayPattern\")\n\n case tt.braceL:\n return this.parseObj(true)\n }\n }\n return this.parseIdent()\n}\n\npp.parseBindingList = function(close, allowEmpty, allowTrailingComma) {\n let elts = [], first = true\n while (!this.eat(close)) {\n if (first) first = false\n else this.expect(tt.comma)\n if (allowEmpty && this.type === tt.comma) {\n elts.push(null)\n } else if (allowTrailingComma && this.afterTrailingComma(close)) {\n break\n } else if (this.type === tt.ellipsis) {\n let rest = this.parseRestBinding()\n this.parseBindingListItem(rest)\n elts.push(rest)\n if (this.type === tt.comma) this.raise(this.start, \"Comma is not permitted after the rest element\")\n this.expect(close)\n break\n } else {\n let elem = this.parseMaybeDefault(this.start, this.startLoc)\n this.parseBindingListItem(elem)\n elts.push(elem)\n }\n }\n return elts\n}\n\npp.parseBindingListItem = function(param) {\n return param\n}\n\n// Parses assignment pattern around given atom if possible.\n\npp.parseMaybeDefault = function(startPos, startLoc, left) {\n left = left || this.parseBindingAtom()\n if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left\n let node = this.startNodeAt(startPos, startLoc)\n node.left = left\n node.right = this.parseMaybeAssign()\n return this.finishNode(node, \"AssignmentPattern\")\n}\n\n// Verify that a node is an lval — something that can be assigned\n// to.\n// bindingType can be either:\n// 'var' indicating that the lval creates a 'var' binding\n// 'let' indicating that the lval creates a lexical ('let' or 'const') binding\n// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references\n\npp.checkLVal = function(expr, bindingType = BIND_NONE, checkClashes) {\n switch (expr.type) {\n case \"Identifier\":\n if (this.strict && this.reservedWordsStrictBind.test(expr.name))\n this.raiseRecoverable(expr.start, (bindingType ? \"Binding \" : \"Assigning to \") + expr.name + \" in strict mode\")\n if (checkClashes) {\n if (has(checkClashes, expr.name))\n this.raiseRecoverable(expr.start, \"Argument name clash\")\n checkClashes[expr.name] = true\n }\n if (bindingType !== BIND_NONE && bindingType !== BIND_OUTSIDE) this.declareName(expr.name, bindingType, expr.start)\n break\n\n case \"MemberExpression\":\n if (bindingType) this.raiseRecoverable(expr.start, \"Binding member expression\")\n break\n\n case \"ObjectPattern\":\n for (let prop of expr.properties)\n this.checkLVal(prop, bindingType, checkClashes)\n break\n\n case \"Property\":\n // AssignmentProperty has type === \"Property\"\n this.checkLVal(expr.value, bindingType, checkClashes)\n break\n\n case \"ArrayPattern\":\n for (let elem of expr.elements) {\n if (elem) this.checkLVal(elem, bindingType, checkClashes)\n }\n break\n\n case \"AssignmentPattern\":\n this.checkLVal(expr.left, bindingType, checkClashes)\n break\n\n case \"RestElement\":\n this.checkLVal(expr.argument, bindingType, checkClashes)\n break\n\n case \"ParenthesizedExpression\":\n this.checkLVal(expr.expression, bindingType, checkClashes)\n break\n\n default:\n this.raise(expr.start, (bindingType ? \"Binding\" : \"Assigning to\") + \" rvalue\")\n }\n}\n","// A recursive descent parser operates by defining functions for all\n// syntactic elements, and recursively calling those, each function\n// advancing the input stream and returning an AST node. Precedence\n// of constructs (for example, the fact that `!x[1]` means `!(x[1])`\n// instead of `(!x)[1]` is handled by the fact that the parser\n// function that parses unary prefix operators is called first, and\n// in turn calls the function that parses `[]` subscripts — that\n// way, it'll receive the node for `x[1]` already parsed, and wraps\n// *that* in the unary operator node.\n//\n// Acorn uses an [operator precedence parser][opp] to handle binary\n// operator precedence, because it is much more compact than using\n// the technique outlined above, which uses different, nesting\n// functions to specify precedence, for all of the ten binary\n// precedence levels that JavaScript defines.\n//\n// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser\n\nimport {types as tt} from \"./tokentype\"\nimport {Parser} from \"./state\"\nimport {DestructuringErrors} from \"./parseutil\"\nimport {lineBreak} from \"./whitespace\"\nimport {functionFlags, SCOPE_ARROW, BIND_OUTSIDE, BIND_VAR} from \"./scopeflags\"\n\nconst pp = Parser.prototype\n\n// Check if property name clashes with already added.\n// Object/class getters and setters are not allowed to clash —\n// either with each other or with an init property — and in\n// strict mode, init properties are also not allowed to be repeated.\n\npp.checkPropClash = function(prop, propHash, refDestructuringErrors) {\n if (this.options.ecmaVersion >= 9 && prop.type === \"SpreadElement\")\n return\n if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))\n return\n let {key} = prop, name\n switch (key.type) {\n case \"Identifier\": name = key.name; break\n case \"Literal\": name = String(key.value); break\n default: return\n }\n let {kind} = prop\n if (this.options.ecmaVersion >= 6) {\n if (name === \"__proto__\" && kind === \"init\") {\n if (propHash.proto) {\n if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) refDestructuringErrors.doubleProto = key.start\n // Backwards-compat kludge. Can be removed in version 6.0\n else this.raiseRecoverable(key.start, \"Redefinition of __proto__ property\")\n }\n propHash.proto = true\n }\n return\n }\n name = \"$\" + name\n let other = propHash[name]\n if (other) {\n let redefinition\n if (kind === \"init\") {\n redefinition = this.strict && other.init || other.get || other.set\n } else {\n redefinition = other.init || other[kind]\n }\n if (redefinition)\n this.raiseRecoverable(key.start, \"Redefinition of property\")\n } else {\n other = propHash[name] = {\n init: false,\n get: false,\n set: false\n }\n }\n other[kind] = true\n}\n\n// ### Expression parsing\n\n// These nest, from the most general expression type at the top to\n// 'atomic', nondivisible expression types at the bottom. Most of\n// the functions will simply let the function(s) below them parse,\n// and, *if* the syntactic construct they handle is present, wrap\n// the AST node that the inner parser gave them in another node.\n\n// Parse a full expression. The optional arguments are used to\n// forbid the `in` operator (in for loops initalization expressions)\n// and provide reference for storing '=' operator inside shorthand\n// property assignment in contexts where both object expression\n// and object pattern might appear (so it's possible to raise\n// delayed syntax error at correct position).\n\npp.parseExpression = function(noIn, refDestructuringErrors) {\n let startPos = this.start, startLoc = this.startLoc\n let expr = this.parseMaybeAssign(noIn, refDestructuringErrors)\n if (this.type === tt.comma) {\n let node = this.startNodeAt(startPos, startLoc)\n node.expressions = [expr]\n while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refDestructuringErrors))\n return this.finishNode(node, \"SequenceExpression\")\n }\n return expr\n}\n\n// Parse an assignment expression. This includes applications of\n// operators like `+=`.\n\npp.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {\n if (this.isContextual(\"yield\")) {\n if (this.inGenerator) return this.parseYield()\n // The tokenizer will assume an expression is allowed after\n // `yield`, but this isn't that kind of yield\n else this.exprAllowed = false\n }\n\n let ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1, oldShorthandAssign = -1\n if (refDestructuringErrors) {\n oldParenAssign = refDestructuringErrors.parenthesizedAssign\n oldTrailingComma = refDestructuringErrors.trailingComma\n oldShorthandAssign = refDestructuringErrors.shorthandAssign;\n refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = refDestructuringErrors.shorthandAssign = -1\n } else {\n refDestructuringErrors = new DestructuringErrors\n ownDestructuringErrors = true\n }\n\n let startPos = this.start, startLoc = this.startLoc\n if (this.type === tt.parenL || this.type === tt.name)\n this.potentialArrowAt = this.start\n let left = this.parseMaybeConditional(noIn, refDestructuringErrors)\n if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc)\n if (this.type.isAssign) {\n let node = this.startNodeAt(startPos, startLoc)\n node.operator = this.value\n node.left = this.type === tt.eq ? this.toAssignable(left, false, refDestructuringErrors) : left\n if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors)\n refDestructuringErrors.shorthandAssign = -1 // reset because shorthand default was used correctly\n this.checkLVal(left)\n this.next()\n node.right = this.parseMaybeAssign(noIn)\n return this.finishNode(node, \"AssignmentExpression\")\n } else {\n if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true)\n }\n if (oldParenAssign > -1) refDestructuringErrors.parenthesizedAssign = oldParenAssign\n if (oldTrailingComma > -1) refDestructuringErrors.trailingComma = oldTrailingComma\n if (oldShorthandAssign > -1) refDestructuringErrors.shorthandAssign = oldShorthandAssign\n return left\n}\n\n// Parse a ternary conditional (`?:`) operator.\n\npp.parseMaybeConditional = function(noIn, refDestructuringErrors) {\n let startPos = this.start, startLoc = this.startLoc\n let expr = this.parseExprOps(noIn, refDestructuringErrors)\n if (this.checkExpressionErrors(refDestructuringErrors)) return expr\n if (this.eat(tt.question)) {\n let node = this.startNodeAt(startPos, startLoc)\n node.test = expr\n node.consequent = this.parseMaybeAssign()\n this.expect(tt.colon)\n node.alternate = this.parseMaybeAssign(noIn)\n return this.finishNode(node, \"ConditionalExpression\")\n }\n return expr\n}\n\n// Start the precedence parser.\n\npp.parseExprOps = function(noIn, refDestructuringErrors) {\n let startPos = this.start, startLoc = this.startLoc\n let expr = this.parseMaybeUnary(refDestructuringErrors, false)\n if (this.checkExpressionErrors(refDestructuringErrors)) return expr\n return expr.start === startPos && expr.type === \"ArrowFunctionExpression\" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)\n}\n\n// Parse binary operators with the operator precedence parsing\n// algorithm. `left` is the left-hand side of the operator.\n// `minPrec` provides context that allows the function to stop and\n// defer further parser to one of its callers when it encounters an\n// operator that has a lower precedence than the set it is parsing.\n\npp.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {\n let prec = this.type.binop\n if (prec != null && (!noIn || this.type !== tt._in)) {\n if (prec > minPrec) {\n let logical = this.type === tt.logicalOR || this.type === tt.logicalAND\n let op = this.value\n this.next()\n let startPos = this.start, startLoc = this.startLoc\n let right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn)\n let node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical)\n return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)\n }\n }\n return left\n}\n\npp.buildBinary = function(startPos, startLoc, left, right, op, logical) {\n let node = this.startNodeAt(startPos, startLoc)\n node.left = left\n node.operator = op\n node.right = right\n return this.finishNode(node, logical ? \"LogicalExpression\" : \"BinaryExpression\")\n}\n\n// Parse unary operators, both prefix and postfix.\n\npp.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {\n let startPos = this.start, startLoc = this.startLoc, expr\n if (this.isContextual(\"await\") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) {\n expr = this.parseAwait()\n sawUnary = true\n } else if (this.type.prefix) {\n let node = this.startNode(), update = this.type === tt.incDec\n node.operator = this.value\n node.prefix = true\n this.next()\n node.argument = this.parseMaybeUnary(null, true)\n this.checkExpressionErrors(refDestructuringErrors, true)\n if (update) this.checkLVal(node.argument)\n else if (this.strict && node.operator === \"delete\" &&\n node.argument.type === \"Identifier\")\n this.raiseRecoverable(node.start, \"Deleting local variable in strict mode\")\n else sawUnary = true\n expr = this.finishNode(node, update ? \"UpdateExpression\" : \"UnaryExpression\")\n } else {\n expr = this.parseExprSubscripts(refDestructuringErrors)\n if (this.checkExpressionErrors(refDestructuringErrors)) return expr\n while (this.type.postfix && !this.canInsertSemicolon()) {\n let node = this.startNodeAt(startPos, startLoc)\n node.operator = this.value\n node.prefix = false\n node.argument = expr\n this.checkLVal(expr)\n this.next()\n expr = this.finishNode(node, \"UpdateExpression\")\n }\n }\n\n if (!sawUnary && this.eat(tt.starstar))\n return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), \"**\", false)\n else\n return expr\n}\n\n// Parse call, dot, and `[]`-subscript expressions.\n\npp.parseExprSubscripts = function(refDestructuringErrors) {\n let startPos = this.start, startLoc = this.startLoc\n let expr = this.parseExprAtom(refDestructuringErrors)\n let skipArrowSubscripts = expr.type === \"ArrowFunctionExpression\" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== \")\"\n if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr\n let result = this.parseSubscripts(expr, startPos, startLoc)\n if (refDestructuringErrors && result.type === \"MemberExpression\") {\n if (refDestructuringErrors.parenthesizedAssign >= result.start) refDestructuringErrors.parenthesizedAssign = -1\n if (refDestructuringErrors.parenthesizedBind >= result.start) refDestructuringErrors.parenthesizedBind = -1\n }\n return result\n}\n\npp.parseSubscripts = function(base, startPos, startLoc, noCalls) {\n let maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === \"Identifier\" && base.name === \"async\" &&\n this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === \"async\"\n for (let computed;;) {\n if ((computed = this.eat(tt.bracketL)) || this.eat(tt.dot)) {\n let node = this.startNodeAt(startPos, startLoc)\n node.object = base\n node.property = computed ? this.parseExpression() : this.parseIdent(true)\n node.computed = !!computed\n if (computed) this.expect(tt.bracketR)\n base = this.finishNode(node, \"MemberExpression\")\n } else if (!noCalls && this.eat(tt.parenL)) {\n let refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos\n this.yieldPos = 0\n this.awaitPos = 0\n let exprList = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors)\n if (maybeAsyncArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {\n this.checkPatternErrors(refDestructuringErrors, false)\n this.checkYieldAwaitInDefaultParams()\n this.yieldPos = oldYieldPos\n this.awaitPos = oldAwaitPos\n return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, true)\n }\n this.checkExpressionErrors(refDestructuringErrors, true)\n this.yieldPos = oldYieldPos || this.yieldPos\n this.awaitPos = oldAwaitPos || this.awaitPos\n let node = this.startNodeAt(startPos, startLoc)\n node.callee = base\n node.arguments = exprList\n base = this.finishNode(node, \"CallExpression\")\n } else if (this.type === tt.backQuote) {\n let node = this.startNodeAt(startPos, startLoc)\n node.tag = base\n node.quasi = this.parseTemplate({isTagged: true})\n base = this.finishNode(node, \"TaggedTemplateExpression\")\n } else {\n return base\n }\n }\n}\n\n// Parse an atomic expression — either a single token that is an\n// expression, an expression started by a keyword like `function` or\n// `new`, or an expression wrapped in punctuation like `()`, `[]`,\n// or `{}`.\n\npp.parseExprAtom = function(refDestructuringErrors) {\n let node, canBeArrow = this.potentialArrowAt === this.start\n switch (this.type) {\n case tt._super:\n if (!this.inFunction)\n this.raise(this.start, \"'super' outside of function or class\")\n node = this.startNode()\n this.next()\n // The `super` keyword can appear at below:\n // SuperProperty:\n // super [ Expression ]\n // super . IdentifierName\n // SuperCall:\n // super Arguments\n if (this.type !== tt.dot && this.type !== tt.bracketL && this.type !== tt.parenL)\n this.unexpected()\n return this.finishNode(node, \"Super\")\n\n case tt._this:\n node = this.startNode()\n this.next()\n return this.finishNode(node, \"ThisExpression\")\n\n case tt.name:\n let startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc\n let id = this.parseIdent(this.type !== tt.name)\n if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === \"async\" && !this.canInsertSemicolon() && this.eat(tt._function))\n return this.parseFunction(this.startNodeAt(startPos, startLoc), 0, false, true)\n if (canBeArrow && !this.canInsertSemicolon()) {\n if (this.eat(tt.arrow))\n return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)\n if (this.options.ecmaVersion >= 8 && id.name === \"async\" && this.type === tt.name && !containsEsc) {\n id = this.parseIdent()\n if (this.canInsertSemicolon() || !this.eat(tt.arrow))\n this.unexpected()\n return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)\n }\n }\n return id\n\n case tt.regexp:\n let value = this.value\n node = this.parseLiteral(value.value)\n node.regex = {pattern: value.pattern, flags: value.flags}\n return node\n\n case tt.num: case tt.string:\n return this.parseLiteral(this.value)\n\n case tt._null: case tt._true: case tt._false:\n node = this.startNode()\n node.value = this.type === tt._null ? null : this.type === tt._true\n node.raw = this.type.keyword\n this.next()\n return this.finishNode(node, \"Literal\")\n\n case tt.parenL:\n let start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow)\n if (refDestructuringErrors) {\n if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))\n refDestructuringErrors.parenthesizedAssign = start\n if (refDestructuringErrors.parenthesizedBind < 0)\n refDestructuringErrors.parenthesizedBind = start\n }\n return expr\n\n case tt.bracketL:\n node = this.startNode()\n this.next()\n node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors)\n return this.finishNode(node, \"ArrayExpression\")\n\n case tt.braceL:\n return this.parseObj(false, refDestructuringErrors)\n\n case tt._function:\n node = this.startNode()\n this.next()\n return this.parseFunction(node, 0)\n\n case tt._class:\n return this.parseClass(this.startNode(), false)\n\n case tt._new:\n return this.parseNew()\n\n case tt.backQuote:\n return this.parseTemplate()\n\n default:\n this.unexpected()\n }\n}\n\npp.parseLiteral = function(value) {\n let node = this.startNode()\n node.value = value\n node.raw = this.input.slice(this.start, this.end)\n this.next()\n return this.finishNode(node, \"Literal\")\n}\n\npp.parseParenExpression = function() {\n this.expect(tt.parenL)\n let val = this.parseExpression()\n this.expect(tt.parenR)\n return val\n}\n\npp.parseParenAndDistinguishExpression = function(canBeArrow) {\n let startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8\n if (this.options.ecmaVersion >= 6) {\n this.next()\n\n let innerStartPos = this.start, innerStartLoc = this.startLoc\n let exprList = [], first = true, lastIsComma = false\n let refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart\n this.yieldPos = 0\n this.awaitPos = 0\n while (this.type !== tt.parenR) {\n first ? first = false : this.expect(tt.comma)\n if (allowTrailingComma && this.afterTrailingComma(tt.parenR, true)) {\n lastIsComma = true\n break\n } else if (this.type === tt.ellipsis) {\n spreadStart = this.start\n exprList.push(this.parseParenItem(this.parseRestBinding()))\n if (this.type === tt.comma) this.raise(this.start, \"Comma is not permitted after the rest element\")\n break\n } else {\n exprList.push(this.parseMaybeAssign(false, refDestructuringErrors, this.parseParenItem))\n }\n }\n let innerEndPos = this.start, innerEndLoc = this.startLoc\n this.expect(tt.parenR)\n\n if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {\n this.checkPatternErrors(refDestructuringErrors, false)\n this.checkYieldAwaitInDefaultParams()\n this.yieldPos = oldYieldPos\n this.awaitPos = oldAwaitPos\n return this.parseParenArrowList(startPos, startLoc, exprList)\n }\n\n if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart)\n if (spreadStart) this.unexpected(spreadStart)\n this.checkExpressionErrors(refDestructuringErrors, true)\n this.yieldPos = oldYieldPos || this.yieldPos\n this.awaitPos = oldAwaitPos || this.awaitPos\n\n if (exprList.length > 1) {\n val = this.startNodeAt(innerStartPos, innerStartLoc)\n val.expressions = exprList\n this.finishNodeAt(val, \"SequenceExpression\", innerEndPos, innerEndLoc)\n } else {\n val = exprList[0]\n }\n } else {\n val = this.parseParenExpression()\n }\n\n if (this.options.preserveParens) {\n let par = this.startNodeAt(startPos, startLoc)\n par.expression = val\n return this.finishNode(par, \"ParenthesizedExpression\")\n } else {\n return val\n }\n}\n\npp.parseParenItem = function(item) {\n return item\n}\n\npp.parseParenArrowList = function(startPos, startLoc, exprList) {\n return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)\n}\n\n// New's precedence is slightly tricky. It must allow its argument to\n// be a `[]` or dot subscript expression, but not a call — at least,\n// not without wrapping it in parentheses. Thus, it uses the noCalls\n// argument to parseSubscripts to prevent it from consuming the\n// argument list.\n\nconst empty = []\n\npp.parseNew = function() {\n let node = this.startNode()\n let meta = this.parseIdent(true)\n if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {\n node.meta = meta\n let containsEsc = this.containsEsc\n node.property = this.parseIdent(true)\n if (node.property.name !== \"target\" || containsEsc)\n this.raiseRecoverable(node.property.start, \"The only valid meta property for new is new.target\")\n if (!this.inNonArrowFunction())\n this.raiseRecoverable(node.start, \"new.target can only be used in functions\")\n return this.finishNode(node, \"MetaProperty\")\n }\n let startPos = this.start, startLoc = this.startLoc\n node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true)\n if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)\n else node.arguments = empty\n return this.finishNode(node, \"NewExpression\")\n}\n\n// Parse template expression.\n\npp.parseTemplateElement = function({isTagged}) {\n let elem = this.startNode()\n if (this.type === tt.invalidTemplate) {\n if (!isTagged) {\n this.raiseRecoverable(this.start, \"Bad escape sequence in untagged template literal\")\n }\n elem.value = {\n raw: this.value,\n cooked: null\n }\n } else {\n elem.value = {\n raw: this.input.slice(this.start, this.end).replace(/\\r\\n?/g, \"\\n\"),\n cooked: this.value\n }\n }\n this.next()\n elem.tail = this.type === tt.backQuote\n return this.finishNode(elem, \"TemplateElement\")\n}\n\npp.parseTemplate = function({isTagged = false} = {}) {\n let node = this.startNode()\n this.next()\n node.expressions = []\n let curElt = this.parseTemplateElement({isTagged})\n node.quasis = [curElt]\n while (!curElt.tail) {\n if (this.type === tt.eof) this.raise(this.pos, \"Unterminated template literal\")\n this.expect(tt.dollarBraceL)\n node.expressions.push(this.parseExpression())\n this.expect(tt.braceR)\n node.quasis.push(curElt = this.parseTemplateElement({isTagged}))\n }\n this.next()\n return this.finishNode(node, \"TemplateLiteral\")\n}\n\npp.isAsyncProp = function(prop) {\n return !prop.computed && prop.key.type === \"Identifier\" && prop.key.name === \"async\" &&\n (this.type === tt.name || this.type === tt.num || this.type === tt.string || this.type === tt.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === tt.star)) &&\n !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))\n}\n\n// Parse an object literal or binding pattern.\n\npp.parseObj = function(isPattern, refDestructuringErrors) {\n let node = this.startNode(), first = true, propHash = {}\n node.properties = []\n this.next()\n while (!this.eat(tt.braceR)) {\n if (!first) {\n this.expect(tt.comma)\n if (this.afterTrailingComma(tt.braceR)) break\n } else first = false\n\n const prop = this.parseProperty(isPattern, refDestructuringErrors)\n if (!isPattern) this.checkPropClash(prop, propHash, refDestructuringErrors)\n node.properties.push(prop)\n }\n return this.finishNode(node, isPattern ? \"ObjectPattern\" : \"ObjectExpression\")\n}\n\npp.parseProperty = function(isPattern, refDestructuringErrors) {\n let prop = this.startNode(), isGenerator, isAsync, startPos, startLoc\n if (this.options.ecmaVersion >= 9 && this.eat(tt.ellipsis)) {\n if (isPattern) {\n prop.argument = this.parseIdent(false)\n if (this.type === tt.comma) {\n this.raise(this.start, \"Comma is not permitted after the rest element\")\n }\n return this.finishNode(prop, \"RestElement\")\n }\n // To disallow parenthesized identifier via `this.toAssignable()`.\n if (this.type === tt.parenL && refDestructuringErrors) {\n if (refDestructuringErrors.parenthesizedAssign < 0) {\n refDestructuringErrors.parenthesizedAssign = this.start\n }\n if (refDestructuringErrors.parenthesizedBind < 0) {\n refDestructuringErrors.parenthesizedBind = this.start\n }\n }\n // Parse argument.\n prop.argument = this.parseMaybeAssign(false, refDestructuringErrors)\n // To disallow trailing comma via `this.toAssignable()`.\n if (this.type === tt.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {\n refDestructuringErrors.trailingComma = this.start\n }\n // Finish\n return this.finishNode(prop, \"SpreadElement\")\n }\n if (this.options.ecmaVersion >= 6) {\n prop.method = false\n prop.shorthand = false\n if (isPattern || refDestructuringErrors) {\n startPos = this.start\n startLoc = this.startLoc\n }\n if (!isPattern)\n isGenerator = this.eat(tt.star)\n }\n let containsEsc = this.containsEsc\n this.parsePropertyName(prop)\n if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {\n isAsync = true\n isGenerator = this.options.ecmaVersion >= 9 && this.eat(tt.star)\n this.parsePropertyName(prop, refDestructuringErrors)\n } else {\n isAsync = false\n }\n this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc)\n return this.finishNode(prop, \"Property\")\n}\n\npp.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {\n if ((isGenerator || isAsync) && this.type === tt.colon)\n this.unexpected()\n\n if (this.eat(tt.colon)) {\n prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors)\n prop.kind = \"init\"\n } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {\n if (isPattern) this.unexpected()\n prop.kind = \"init\"\n prop.method = true\n prop.value = this.parseMethod(isGenerator, isAsync)\n } else if (!isPattern && !containsEsc &&\n this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === \"Identifier\" &&\n (prop.key.name === \"get\" || prop.key.name === \"set\") &&\n (this.type !== tt.comma && this.type !== tt.braceR)) {\n if (isGenerator || isAsync) this.unexpected()\n prop.kind = prop.key.name\n this.parsePropertyName(prop)\n prop.value = this.parseMethod(false)\n let paramCount = prop.kind === \"get\" ? 0 : 1\n if (prop.value.params.length !== paramCount) {\n let start = prop.value.start\n if (prop.kind === \"get\")\n this.raiseRecoverable(start, \"getter should have no params\")\n else\n this.raiseRecoverable(start, \"setter should have exactly one param\")\n } else {\n if (prop.kind === \"set\" && prop.value.params[0].type === \"RestElement\")\n this.raiseRecoverable(prop.value.params[0].start, \"Setter cannot use rest params\")\n }\n } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === \"Identifier\") {\n this.checkUnreserved(prop.key)\n prop.kind = \"init\"\n if (isPattern) {\n prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)\n } else if (this.type === tt.eq && refDestructuringErrors) {\n if (refDestructuringErrors.shorthandAssign < 0)\n refDestructuringErrors.shorthandAssign = this.start\n prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)\n } else {\n prop.value = prop.key\n }\n prop.shorthand = true\n } else this.unexpected()\n}\n\npp.parsePropertyName = function(prop) {\n if (this.options.ecmaVersion >= 6) {\n if (this.eat(tt.bracketL)) {\n prop.computed = true\n prop.key = this.parseMaybeAssign()\n this.expect(tt.bracketR)\n return prop.key\n } else {\n prop.computed = false\n }\n }\n return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)\n}\n\n// Initialize empty function node.\n\npp.initFunction = function(node) {\n node.id = null\n if (this.options.ecmaVersion >= 6) node.generator = node.expression = false\n if (this.options.ecmaVersion >= 8) node.async = false\n}\n\n// Parse object or class method.\n\npp.parseMethod = function(isGenerator, isAsync) {\n let node = this.startNode(), oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos\n\n this.initFunction(node)\n if (this.options.ecmaVersion >= 6)\n node.generator = isGenerator\n if (this.options.ecmaVersion >= 8)\n node.async = !!isAsync\n\n this.yieldPos = 0\n this.awaitPos = 0\n this.enterScope(functionFlags(isAsync, node.generator))\n\n this.expect(tt.parenL)\n node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8)\n this.checkYieldAwaitInDefaultParams()\n this.parseFunctionBody(node, false)\n\n this.yieldPos = oldYieldPos\n this.awaitPos = oldAwaitPos\n return this.finishNode(node, \"FunctionExpression\")\n}\n\n// Parse arrow function expression with given parameters.\n\npp.parseArrowExpression = function(node, params, isAsync) {\n let oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos\n\n this.enterScope(functionFlags(isAsync, false) | SCOPE_ARROW)\n this.initFunction(node)\n if (this.options.ecmaVersion >= 8) node.async = !!isAsync\n\n this.yieldPos = 0\n this.awaitPos = 0\n\n node.params = this.toAssignableList(params, true)\n this.parseFunctionBody(node, true)\n\n this.yieldPos = oldYieldPos\n this.awaitPos = oldAwaitPos\n return this.finishNode(node, \"ArrowFunctionExpression\")\n}\n\n// Parse function body and check parameters.\n\npp.parseFunctionBody = function(node, isArrowFunction) {\n let isExpression = isArrowFunction && this.type !== tt.braceL\n let oldStrict = this.strict, useStrict = false\n\n if (isExpression) {\n node.body = this.parseMaybeAssign()\n node.expression = true\n this.checkParams(node, false)\n } else {\n let nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params)\n if (!oldStrict || nonSimple) {\n useStrict = this.strictDirective(this.end)\n // If this is a strict mode function, verify that argument names\n // are not repeated, and it does not try to bind the words `eval`\n // or `arguments`.\n if (useStrict && nonSimple)\n this.raiseRecoverable(node.start, \"Illegal 'use strict' directive in function with non-simple parameter list\")\n }\n // Start a new scope with regard to labels and the `inFunction`\n // flag (restore them to their old value afterwards).\n let oldLabels = this.labels\n this.labels = []\n if (useStrict) this.strict = true\n\n // Add the params to varDeclaredNames to ensure that an error is thrown\n // if a let/const declaration in the function clashes with one of the params.\n this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params))\n node.body = this.parseBlock(false)\n node.expression = false\n this.adaptDirectivePrologue(node.body.body)\n this.labels = oldLabels\n }\n this.exitScope()\n\n // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'\n if (this.strict && node.id) this.checkLVal(node.id, BIND_OUTSIDE)\n this.strict = oldStrict\n}\n\npp.isSimpleParamList = function(params) {\n for (let param of params)\n if (param.type !== \"Identifier\") return false\n return true\n}\n\n// Checks function params for various disallowed patterns such as using \"eval\"\n// or \"arguments\" and duplicate parameters.\n\npp.checkParams = function(node, allowDuplicates) {\n let nameHash = {}\n for (let param of node.params)\n this.checkLVal(param, BIND_VAR, allowDuplicates ? null : nameHash)\n}\n\n// Parses a comma-separated list of expressions, and returns them as\n// an array. `close` is the token type that ends the list, and\n// `allowEmpty` can be turned on to allow subsequent commas with\n// nothing in between them to be parsed as `null` (which is needed\n// for array literals).\n\npp.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {\n let elts = [], first = true\n while (!this.eat(close)) {\n if (!first) {\n this.expect(tt.comma)\n if (allowTrailingComma && this.afterTrailingComma(close)) break\n } else first = false\n\n let elt\n if (allowEmpty && this.type === tt.comma)\n elt = null\n else if (this.type === tt.ellipsis) {\n elt = this.parseSpread(refDestructuringErrors)\n if (refDestructuringErrors && this.type === tt.comma && refDestructuringErrors.trailingComma < 0)\n refDestructuringErrors.trailingComma = this.start\n } else {\n elt = this.parseMaybeAssign(false, refDestructuringErrors)\n }\n elts.push(elt)\n }\n return elts\n}\n\npp.checkUnreserved = function({start, end, name}) {\n if (this.inGenerator && name === \"yield\")\n this.raiseRecoverable(start, \"Can not use 'yield' as identifier inside a generator\")\n if (this.inAsync && name === \"await\")\n this.raiseRecoverable(start, \"Can not use 'await' as identifier inside an async function\")\n if (this.keywords.test(name))\n this.raise(start, `Unexpected keyword '${name}'`)\n if (this.options.ecmaVersion < 6 &&\n this.input.slice(start, end).indexOf(\"\\\\\") !== -1) return\n const re = this.strict ? this.reservedWordsStrict : this.reservedWords\n if (re.test(name)) {\n if (!this.inAsync && name === \"await\")\n this.raiseRecoverable(start, \"Can not use keyword 'await' outside an async function\")\n this.raiseRecoverable(start, `The keyword '${name}' is reserved`)\n }\n}\n\n// Parse the next token as an identifier. If `liberal` is true (used\n// when parsing properties), it will also convert keywords into\n// identifiers.\n\npp.parseIdent = function(liberal, isBinding) {\n let node = this.startNode()\n if (liberal && this.options.allowReserved === \"never\") liberal = false\n if (this.type === tt.name) {\n node.name = this.value\n } else if (this.type.keyword) {\n node.name = this.type.keyword\n\n // To fix https://github.com/acornjs/acorn/issues/575\n // `class` and `function` keywords push new context into this.context.\n // But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.\n // If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword\n if ((node.name === \"class\" || node.name === \"function\") &&\n (this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {\n this.context.pop()\n }\n } else {\n this.unexpected()\n }\n this.next()\n this.finishNode(node, \"Identifier\")\n if (!liberal) this.checkUnreserved(node)\n return node\n}\n\n// Parses yield expression inside generator.\n\npp.parseYield = function() {\n if (!this.yieldPos) this.yieldPos = this.start\n\n let node = this.startNode()\n this.next()\n if (this.type === tt.semi || this.canInsertSemicolon() || (this.type !== tt.star && !this.type.startsExpr)) {\n node.delegate = false\n node.argument = null\n } else {\n node.delegate = this.eat(tt.star)\n node.argument = this.parseMaybeAssign()\n }\n return this.finishNode(node, \"YieldExpression\")\n}\n\npp.parseAwait = function() {\n if (!this.awaitPos) this.awaitPos = this.start\n\n let node = this.startNode()\n this.next()\n node.argument = this.parseMaybeUnary(null, true)\n return this.finishNode(node, \"AwaitExpression\")\n}\n","import {Parser} from \"./state\"\nimport {Position, getLineInfo} from \"./locutil\"\n\nconst pp = Parser.prototype\n\n// This function is used to raise exceptions on parse errors. It\n// takes an offset integer (into the current `input`) to indicate\n// the location of the error, attaches the position to the end\n// of the error message, and then raises a `SyntaxError` with that\n// message.\n\npp.raise = function(pos, message) {\n let loc = getLineInfo(this.input, pos)\n message += \" (\" + loc.line + \":\" + loc.column + \")\"\n let err = new SyntaxError(message)\n err.pos = pos; err.loc = loc; err.raisedAt = this.pos\n throw err\n}\n\npp.raiseRecoverable = pp.raise\n\npp.curPosition = function() {\n if (this.options.locations) {\n return new Position(this.curLine, this.pos - this.lineStart)\n }\n}\n","import {Parser} from \"./state\"\nimport {SCOPE_VAR, SCOPE_FUNCTION, SCOPE_ARROW, SCOPE_SIMPLE_CATCH, BIND_LEXICAL, BIND_SIMPLE_CATCH, BIND_FUNCTION} from \"./scopeflags\"\n\nconst pp = Parser.prototype\n\nclass Scope {\n constructor(flags) {\n this.flags = flags\n // A list of var-declared names in the current lexical scope\n this.var = []\n // A list of lexically-declared names in the current lexical scope\n this.lexical = []\n }\n}\n\n// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.\n\npp.enterScope = function(flags) {\n this.scopeStack.push(new Scope(flags))\n}\n\npp.exitScope = function() {\n this.scopeStack.pop()\n}\n\npp.declareName = function(name, bindingType, pos) {\n let redeclared = false\n if (bindingType === BIND_LEXICAL) {\n const scope = this.currentScope()\n redeclared = scope.lexical.indexOf(name) > -1 || scope.var.indexOf(name) > -1\n scope.lexical.push(name)\n } else if (bindingType === BIND_SIMPLE_CATCH) {\n const scope = this.currentScope()\n scope.lexical.push(name)\n } else if (bindingType === BIND_FUNCTION) {\n const scope = this.currentScope()\n redeclared = scope.lexical.indexOf(name) > -1\n scope.var.push(name)\n } else {\n for (let i = this.scopeStack.length - 1; i >= 0; --i) {\n const scope = this.scopeStack[i]\n if (scope.lexical.indexOf(name) > -1 && !(scope.flags & SCOPE_SIMPLE_CATCH) && scope.lexical[0] === name) redeclared = true\n scope.var.push(name)\n if (scope.flags & SCOPE_VAR) break\n }\n }\n if (redeclared) this.raiseRecoverable(pos, `Identifier '${name}' has already been declared`)\n}\n\npp.currentScope = function() {\n return this.scopeStack[this.scopeStack.length - 1]\n}\n\npp.currentVarScope = function() {\n for (let i = this.scopeStack.length - 1;; i--) {\n let scope = this.scopeStack[i]\n if (scope.flags & SCOPE_VAR) return scope\n }\n}\n\npp.inNonArrowFunction = function() {\n for (let i = this.scopeStack.length - 1; i >= 0; i--)\n if (this.scopeStack[i].flags & SCOPE_FUNCTION && !(this.scopeStack[i].flags & SCOPE_ARROW)) return true\n return false\n}\n","import {Parser} from \"./state\"\nimport {SourceLocation} from \"./locutil\"\n\nexport class Node {\n constructor(parser, pos, loc) {\n this.type = \"\"\n this.start = pos\n this.end = 0\n if (parser.options.locations)\n this.loc = new SourceLocation(parser, loc)\n if (parser.options.directSourceFile)\n this.sourceFile = parser.options.directSourceFile\n if (parser.options.ranges)\n this.range = [pos, 0]\n }\n}\n\n// Start an AST node, attaching a start offset.\n\nconst pp = Parser.prototype\n\npp.startNode = function() {\n return new Node(this, this.start, this.startLoc)\n}\n\npp.startNodeAt = function(pos, loc) {\n return new Node(this, pos, loc)\n}\n\n// Finish an AST node, adding `type` and `end` properties.\n\nfunction finishNodeAt(node, type, pos, loc) {\n node.type = type\n node.end = pos\n if (this.options.locations)\n node.loc.end = loc\n if (this.options.ranges)\n node.range[1] = pos\n return node\n}\n\npp.finishNode = function(node, type) {\n return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)\n}\n\n// Finish node at given position\n\npp.finishNodeAt = function(node, type, pos, loc) {\n return finishNodeAt.call(this, node, type, pos, loc)\n}\n","// The algorithm used to determine whether a regexp can appear at a\n// given point in the program is loosely based on sweet.js' approach.\n// See https://github.com/mozilla/sweet.js/wiki/design\n\nimport {Parser} from \"./state\"\nimport {types as tt} from \"./tokentype\"\nimport {lineBreak} from \"./whitespace\"\n\nexport class TokContext {\n constructor(token, isExpr, preserveSpace, override, generator) {\n this.token = token\n this.isExpr = !!isExpr\n this.preserveSpace = !!preserveSpace\n this.override = override\n this.generator = !!generator\n }\n}\n\nexport const types = {\n b_stat: new TokContext(\"{\", false),\n b_expr: new TokContext(\"{\", true),\n b_tmpl: new TokContext(\"${\", false),\n p_stat: new TokContext(\"(\", false),\n p_expr: new TokContext(\"(\", true),\n q_tmpl: new TokContext(\"`\", true, true, p => p.tryReadTemplateToken()),\n f_stat: new TokContext(\"function\", false),\n f_expr: new TokContext(\"function\", true),\n f_expr_gen: new TokContext(\"function\", true, false, null, true),\n f_gen: new TokContext(\"function\", false, false, null, true)\n}\n\nconst pp = Parser.prototype\n\npp.initialContext = function() {\n return [types.b_stat]\n}\n\npp.braceIsBlock = function(prevType) {\n let parent = this.curContext()\n if (parent === types.f_expr || parent === types.f_stat)\n return true\n if (prevType === tt.colon && (parent === types.b_stat || parent === types.b_expr))\n return !parent.isExpr\n\n // The check for `tt.name && exprAllowed` detects whether we are\n // after a `yield` or `of` construct. See the `updateContext` for\n // `tt.name`.\n if (prevType === tt._return || prevType === tt.name && this.exprAllowed)\n return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))\n if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR || prevType === tt.arrow)\n return true\n if (prevType === tt.braceL)\n return parent === types.b_stat\n if (prevType === tt._var || prevType === tt.name)\n return false\n return !this.exprAllowed\n}\n\npp.inGeneratorContext = function() {\n for (let i = this.context.length - 1; i >= 1; i--) {\n let context = this.context[i]\n if (context.token === \"function\")\n return context.generator\n }\n return false\n}\n\npp.updateContext = function(prevType) {\n let update, type = this.type\n if (type.keyword && prevType === tt.dot)\n this.exprAllowed = false\n else if (update = type.updateContext)\n update.call(this, prevType)\n else\n this.exprAllowed = type.beforeExpr\n}\n\n// Token-specific context update code\n\ntt.parenR.updateContext = tt.braceR.updateContext = function() {\n if (this.context.length === 1) {\n this.exprAllowed = true\n return\n }\n let out = this.context.pop()\n if (out === types.b_stat && this.curContext().token === \"function\") {\n out = this.context.pop()\n }\n this.exprAllowed = !out.isExpr\n}\n\ntt.braceL.updateContext = function(prevType) {\n this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr)\n this.exprAllowed = true\n}\n\ntt.dollarBraceL.updateContext = function() {\n this.context.push(types.b_tmpl)\n this.exprAllowed = true\n}\n\ntt.parenL.updateContext = function(prevType) {\n let statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while\n this.context.push(statementParens ? types.p_stat : types.p_expr)\n this.exprAllowed = true\n}\n\ntt.incDec.updateContext = function() {\n // tokExprAllowed stays unchanged\n}\n\ntt._function.updateContext = tt._class.updateContext = function(prevType) {\n if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else &&\n !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat))\n this.context.push(types.f_expr)\n else\n this.context.push(types.f_stat)\n this.exprAllowed = false\n}\n\ntt.backQuote.updateContext = function() {\n if (this.curContext() === types.q_tmpl)\n this.context.pop()\n else\n this.context.push(types.q_tmpl)\n this.exprAllowed = false\n}\n\ntt.star.updateContext = function(prevType) {\n if (prevType === tt._function) {\n let index = this.context.length - 1\n if (this.context[index] === types.f_expr)\n this.context[index] = types.f_expr_gen\n else\n this.context[index] = types.f_gen\n }\n this.exprAllowed = true\n}\n\ntt.name.updateContext = function(prevType) {\n let allowed = false\n if (this.options.ecmaVersion >= 6 && prevType !== tt.dot) {\n if (this.value === \"of\" && !this.exprAllowed ||\n this.value === \"yield\" && this.inGeneratorContext())\n allowed = true\n }\n this.exprAllowed = allowed\n}\n","const data = {\n \"$LONE\": [\n \"ASCII\",\n \"ASCII_Hex_Digit\",\n \"AHex\",\n \"Alphabetic\",\n \"Alpha\",\n \"Any\",\n \"Assigned\",\n \"Bidi_Control\",\n \"Bidi_C\",\n \"Bidi_Mirrored\",\n \"Bidi_M\",\n \"Case_Ignorable\",\n \"CI\",\n \"Cased\",\n \"Changes_When_Casefolded\",\n \"CWCF\",\n \"Changes_When_Casemapped\",\n \"CWCM\",\n \"Changes_When_Lowercased\",\n \"CWL\",\n \"Changes_When_NFKC_Casefolded\",\n \"CWKCF\",\n \"Changes_When_Titlecased\",\n \"CWT\",\n \"Changes_When_Uppercased\",\n \"CWU\",\n \"Dash\",\n \"Default_Ignorable_Code_Point\",\n \"DI\",\n \"Deprecated\",\n \"Dep\",\n \"Diacritic\",\n \"Dia\",\n \"Emoji\",\n \"Emoji_Component\",\n \"Emoji_Modifier\",\n \"Emoji_Modifier_Base\",\n \"Emoji_Presentation\",\n \"Extender\",\n \"Ext\",\n \"Grapheme_Base\",\n \"Gr_Base\",\n \"Grapheme_Extend\",\n \"Gr_Ext\",\n \"Hex_Digit\",\n \"Hex\",\n \"IDS_Binary_Operator\",\n \"IDSB\",\n \"IDS_Trinary_Operator\",\n \"IDST\",\n \"ID_Continue\",\n \"IDC\",\n \"ID_Start\",\n \"IDS\",\n \"Ideographic\",\n \"Ideo\",\n \"Join_Control\",\n \"Join_C\",\n \"Logical_Order_Exception\",\n \"LOE\",\n \"Lowercase\",\n \"Lower\",\n \"Math\",\n \"Noncharacter_Code_Point\",\n \"NChar\",\n \"Pattern_Syntax\",\n \"Pat_Syn\",\n \"Pattern_White_Space\",\n \"Pat_WS\",\n \"Quotation_Mark\",\n \"QMark\",\n \"Radical\",\n \"Regional_Indicator\",\n \"RI\",\n \"Sentence_Terminal\",\n \"STerm\",\n \"Soft_Dotted\",\n \"SD\",\n \"Terminal_Punctuation\",\n \"Term\",\n \"Unified_Ideograph\",\n \"UIdeo\",\n \"Uppercase\",\n \"Upper\",\n \"Variation_Selector\",\n \"VS\",\n \"White_Space\",\n \"space\",\n \"XID_Continue\",\n \"XIDC\",\n \"XID_Start\",\n \"XIDS\"\n ],\n \"General_Category\": [\n \"Cased_Letter\",\n \"LC\",\n \"Close_Punctuation\",\n \"Pe\",\n \"Connector_Punctuation\",\n \"Pc\",\n \"Control\",\n \"Cc\",\n \"cntrl\",\n \"Currency_Symbol\",\n \"Sc\",\n \"Dash_Punctuation\",\n \"Pd\",\n \"Decimal_Number\",\n \"Nd\",\n \"digit\",\n \"Enclosing_Mark\",\n \"Me\",\n \"Final_Punctuation\",\n \"Pf\",\n \"Format\",\n \"Cf\",\n \"Initial_Punctuation\",\n \"Pi\",\n \"Letter\",\n \"L\",\n \"Letter_Number\",\n \"Nl\",\n \"Line_Separator\",\n \"Zl\",\n \"Lowercase_Letter\",\n \"Ll\",\n \"Mark\",\n \"M\",\n \"Combining_Mark\",\n \"Math_Symbol\",\n \"Sm\",\n \"Modifier_Letter\",\n \"Lm\",\n \"Modifier_Symbol\",\n \"Sk\",\n \"Nonspacing_Mark\",\n \"Mn\",\n \"Number\",\n \"N\",\n \"Open_Punctuation\",\n \"Ps\",\n \"Other\",\n \"C\",\n \"Other_Letter\",\n \"Lo\",\n \"Other_Number\",\n \"No\",\n \"Other_Punctuation\",\n \"Po\",\n \"Other_Symbol\",\n \"So\",\n \"Paragraph_Separator\",\n \"Zp\",\n \"Private_Use\",\n \"Co\",\n \"Punctuation\",\n \"P\",\n \"punct\",\n \"Separator\",\n \"Z\",\n \"Space_Separator\",\n \"Zs\",\n \"Spacing_Mark\",\n \"Mc\",\n \"Surrogate\",\n \"Cs\",\n \"Symbol\",\n \"S\",\n \"Titlecase_Letter\",\n \"Lt\",\n \"Unassigned\",\n \"Cn\",\n \"Uppercase_Letter\",\n \"Lu\"\n ],\n \"Script\": [\n \"Adlam\",\n \"Adlm\",\n \"Ahom\",\n \"Anatolian_Hieroglyphs\",\n \"Hluw\",\n \"Arabic\",\n \"Arab\",\n \"Armenian\",\n \"Armn\",\n \"Avestan\",\n \"Avst\",\n \"Balinese\",\n \"Bali\",\n \"Bamum\",\n \"Bamu\",\n \"Bassa_Vah\",\n \"Bass\",\n \"Batak\",\n \"Batk\",\n \"Bengali\",\n \"Beng\",\n \"Bhaiksuki\",\n \"Bhks\",\n \"Bopomofo\",\n \"Bopo\",\n \"Brahmi\",\n \"Brah\",\n \"Braille\",\n \"Brai\",\n \"Buginese\",\n \"Bugi\",\n \"Buhid\",\n \"Buhd\",\n \"Canadian_Aboriginal\",\n \"Cans\",\n \"Carian\",\n \"Cari\",\n \"Caucasian_Albanian\",\n \"Aghb\",\n \"Chakma\",\n \"Cakm\",\n \"Cham\",\n \"Cherokee\",\n \"Cher\",\n \"Common\",\n \"Zyyy\",\n \"Coptic\",\n \"Copt\",\n \"Qaac\",\n \"Cuneiform\",\n \"Xsux\",\n \"Cypriot\",\n \"Cprt\",\n \"Cyrillic\",\n \"Cyrl\",\n \"Deseret\",\n \"Dsrt\",\n \"Devanagari\",\n \"Deva\",\n \"Duployan\",\n \"Dupl\",\n \"Egyptian_Hieroglyphs\",\n \"Egyp\",\n \"Elbasan\",\n \"Elba\",\n \"Ethiopic\",\n \"Ethi\",\n \"Georgian\",\n \"Geor\",\n \"Glagolitic\",\n \"Glag\",\n \"Gothic\",\n \"Goth\",\n \"Grantha\",\n \"Gran\",\n \"Greek\",\n \"Grek\",\n \"Gujarati\",\n \"Gujr\",\n \"Gurmukhi\",\n \"Guru\",\n \"Han\",\n \"Hani\",\n \"Hangul\",\n \"Hang\",\n \"Hanunoo\",\n \"Hano\",\n \"Hatran\",\n \"Hatr\",\n \"Hebrew\",\n \"Hebr\",\n \"Hiragana\",\n \"Hira\",\n \"Imperial_Aramaic\",\n \"Armi\",\n \"Inherited\",\n \"Zinh\",\n \"Qaai\",\n \"Inscriptional_Pahlavi\",\n \"Phli\",\n \"Inscriptional_Parthian\",\n \"Prti\",\n \"Javanese\",\n \"Java\",\n \"Kaithi\",\n \"Kthi\",\n \"Kannada\",\n \"Knda\",\n \"Katakana\",\n \"Kana\",\n \"Kayah_Li\",\n \"Kali\",\n \"Kharoshthi\",\n \"Khar\",\n \"Khmer\",\n \"Khmr\",\n \"Khojki\",\n \"Khoj\",\n \"Khudawadi\",\n \"Sind\",\n \"Lao\",\n \"Laoo\",\n \"Latin\",\n \"Latn\",\n \"Lepcha\",\n \"Lepc\",\n \"Limbu\",\n \"Limb\",\n \"Linear_A\",\n \"Lina\",\n \"Linear_B\",\n \"Linb\",\n \"Lisu\",\n \"Lycian\",\n \"Lyci\",\n \"Lydian\",\n \"Lydi\",\n \"Mahajani\",\n \"Mahj\",\n \"Malayalam\",\n \"Mlym\",\n \"Mandaic\",\n \"Mand\",\n \"Manichaean\",\n \"Mani\",\n \"Marchen\",\n \"Marc\",\n \"Masaram_Gondi\",\n \"Gonm\",\n \"Meetei_Mayek\",\n \"Mtei\",\n \"Mende_Kikakui\",\n \"Mend\",\n \"Meroitic_Cursive\",\n \"Merc\",\n \"Meroitic_Hieroglyphs\",\n \"Mero\",\n \"Miao\",\n \"Plrd\",\n \"Modi\",\n \"Mongolian\",\n \"Mong\",\n \"Mro\",\n \"Mroo\",\n \"Multani\",\n \"Mult\",\n \"Myanmar\",\n \"Mymr\",\n \"Nabataean\",\n \"Nbat\",\n \"New_Tai_Lue\",\n \"Talu\",\n \"Newa\",\n \"Nko\",\n \"Nkoo\",\n \"Nushu\",\n \"Nshu\",\n \"Ogham\",\n \"Ogam\",\n \"Ol_Chiki\",\n \"Olck\",\n \"Old_Hungarian\",\n \"Hung\",\n \"Old_Italic\",\n \"Ital\",\n \"Old_North_Arabian\",\n \"Narb\",\n \"Old_Permic\",\n \"Perm\",\n \"Old_Persian\",\n \"Xpeo\",\n \"Old_South_Arabian\",\n \"Sarb\",\n \"Old_Turkic\",\n \"Orkh\",\n \"Oriya\",\n \"Orya\",\n \"Osage\",\n \"Osge\",\n \"Osmanya\",\n \"Osma\",\n \"Pahawh_Hmong\",\n \"Hmng\",\n \"Palmyrene\",\n \"Palm\",\n \"Pau_Cin_Hau\",\n \"Pauc\",\n \"Phags_Pa\",\n \"Phag\",\n \"Phoenician\",\n \"Phnx\",\n \"Psalter_Pahlavi\",\n \"Phlp\",\n \"Rejang\",\n \"Rjng\",\n \"Runic\",\n \"Runr\",\n \"Samaritan\",\n \"Samr\",\n \"Saurashtra\",\n \"Saur\",\n \"Sharada\",\n \"Shrd\",\n \"Shavian\",\n \"Shaw\",\n \"Siddham\",\n \"Sidd\",\n \"SignWriting\",\n \"Sgnw\",\n \"Sinhala\",\n \"Sinh\",\n \"Sora_Sompeng\",\n \"Sora\",\n \"Soyombo\",\n \"Soyo\",\n \"Sundanese\",\n \"Sund\",\n \"Syloti_Nagri\",\n \"Sylo\",\n \"Syriac\",\n \"Syrc\",\n \"Tagalog\",\n \"Tglg\",\n \"Tagbanwa\",\n \"Tagb\",\n \"Tai_Le\",\n \"Tale\",\n \"Tai_Tham\",\n \"Lana\",\n \"Tai_Viet\",\n \"Tavt\",\n \"Takri\",\n \"Takr\",\n \"Tamil\",\n \"Taml\",\n \"Tangut\",\n \"Tang\",\n \"Telugu\",\n \"Telu\",\n \"Thaana\",\n \"Thaa\",\n \"Thai\",\n \"Tibetan\",\n \"Tibt\",\n \"Tifinagh\",\n \"Tfng\",\n \"Tirhuta\",\n \"Tirh\",\n \"Ugaritic\",\n \"Ugar\",\n \"Vai\",\n \"Vaii\",\n \"Warang_Citi\",\n \"Wara\",\n \"Yi\",\n \"Yiii\",\n \"Zanabazar_Square\",\n \"Zanb\"\n ]\n}\nArray.prototype.push.apply(data.$LONE, data.General_Category)\ndata.gc = data.General_Category\ndata.sc = data.Script_Extensions = data.scx = data.Script\n\nexport default data\n","import {isIdentifierStart, isIdentifierChar} from \"./identifier.js\"\nimport {Parser} from \"./state.js\"\nimport UNICODE_PROPERTY_VALUES from \"./unicode-property-data.js\"\n\nconst pp = Parser.prototype\n\nexport class RegExpValidationState {\n constructor(parser) {\n this.parser = parser\n this.validFlags = `gim${parser.options.ecmaVersion >= 6 ? \"uy\" : \"\"}${parser.options.ecmaVersion >= 9 ? \"s\" : \"\"}`\n this.source = \"\"\n this.flags = \"\"\n this.start = 0\n this.switchU = false\n this.switchN = false\n this.pos = 0\n this.lastIntValue = 0\n this.lastStringValue = \"\"\n this.lastAssertionIsQuantifiable = false\n this.numCapturingParens = 0\n this.maxBackReference = 0\n this.groupNames = []\n this.backReferenceNames = []\n }\n\n reset(start, pattern, flags) {\n const unicode = flags.indexOf(\"u\") !== -1\n this.start = start | 0\n this.source = pattern + \"\"\n this.flags = flags\n this.switchU = unicode && this.parser.options.ecmaVersion >= 6\n this.switchN = unicode && this.parser.options.ecmaVersion >= 9\n }\n\n raise(message) {\n this.parser.raiseRecoverable(this.start, `Invalid regular expression: /${this.source}/: ${message}`)\n }\n\n // If u flag is given, this returns the code point at the index (it combines a surrogate pair).\n // Otherwise, this returns the code unit of the index (can be a part of a surrogate pair).\n at(i) {\n const s = this.source\n const l = s.length\n if (i >= l) {\n return -1\n }\n const c = s.charCodeAt(i)\n if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {\n return c\n }\n return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00\n }\n\n nextIndex(i) {\n const s = this.source\n const l = s.length\n if (i >= l) {\n return l\n }\n const c = s.charCodeAt(i)\n if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {\n return i + 1\n }\n return i + 2\n }\n\n current() {\n return this.at(this.pos)\n }\n\n lookahead() {\n return this.at(this.nextIndex(this.pos))\n }\n\n advance() {\n this.pos = this.nextIndex(this.pos)\n }\n\n eat(ch) {\n if (this.current() === ch) {\n this.advance()\n return true\n }\n return false\n }\n}\n\nfunction codePointToString(ch) {\n if (ch <= 0xFFFF) return String.fromCharCode(ch)\n ch -= 0x10000\n return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00)\n}\n\n/**\n * Validate the flags part of a given RegExpLiteral.\n *\n * @param {RegExpValidationState} state The state to validate RegExp.\n * @returns {void}\n */\npp.validateRegExpFlags = function(state) {\n const validFlags = state.validFlags\n const flags = state.flags\n\n for (let i = 0; i < flags.length; i++) {\n const flag = flags.charAt(i)\n if (validFlags.indexOf(flag) === -1) {\n this.raise(state.start, \"Invalid regular expression flag\")\n }\n if (flags.indexOf(flag, i + 1) > -1) {\n this.raise(state.start, \"Duplicate regular expression flag\")\n }\n }\n}\n\n/**\n * Validate the pattern part of a given RegExpLiteral.\n *\n * @param {RegExpValidationState} state The state to validate RegExp.\n * @returns {void}\n */\npp.validateRegExpPattern = function(state) {\n this.regexp_pattern(state)\n\n // The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of\n // parsing contains a |GroupName|, reparse with the goal symbol\n // |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError*\n // exception if _P_ did not conform to the grammar, if any elements of _P_\n // were not matched by the parse, or if any Early Error conditions exist.\n if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) {\n state.switchN = true\n this.regexp_pattern(state)\n }\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern\npp.regexp_pattern = function(state) {\n state.pos = 0\n state.lastIntValue = 0\n state.lastStringValue = \"\"\n state.lastAssertionIsQuantifiable = false\n state.numCapturingParens = 0\n state.maxBackReference = 0\n state.groupNames.length = 0\n state.backReferenceNames.length = 0\n\n this.regexp_disjunction(state)\n\n if (state.pos !== state.source.length) {\n // Make the same messages as V8.\n if (state.eat(0x29 /* ) */)) {\n state.raise(\"Unmatched ')'\")\n }\n if (state.eat(0x5D /* [ */) || state.eat(0x7D /* } */)) {\n state.raise(\"Lone quantifier brackets\")\n }\n }\n if (state.maxBackReference > state.numCapturingParens) {\n state.raise(\"Invalid escape\")\n }\n for (const name of state.backReferenceNames) {\n if (state.groupNames.indexOf(name) === -1) {\n state.raise(\"Invalid named capture referenced\")\n }\n }\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction\npp.regexp_disjunction = function(state) {\n this.regexp_alternative(state)\n while (state.eat(0x7C /* | */)) {\n this.regexp_alternative(state)\n }\n\n // Make the same message as V8.\n if (this.regexp_eatQuantifier(state, true)) {\n state.raise(\"Nothing to repeat\")\n }\n if (state.eat(0x7B /* { */)) {\n state.raise(\"Lone quantifier brackets\")\n }\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative\npp.regexp_alternative = function(state) {\n while (state.pos < state.source.length && this.regexp_eatTerm(state))\n ;\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term\npp.regexp_eatTerm = function(state) {\n if (this.regexp_eatAssertion(state)) {\n // Handle `QuantifiableAssertion Quantifier` alternative.\n // `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion\n // is a QuantifiableAssertion.\n if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) {\n // Make the same message as V8.\n if (state.switchU) {\n state.raise(\"Invalid quantifier\")\n }\n }\n return true\n }\n\n if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) {\n this.regexp_eatQuantifier(state)\n return true\n }\n\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion\npp.regexp_eatAssertion = function(state) {\n const start = state.pos\n state.lastAssertionIsQuantifiable = false\n\n // ^, $\n if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) {\n return true\n }\n\n // \\b \\B\n if (state.eat(0x5C /* \\ */)) {\n if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) {\n return true\n }\n state.pos = start\n }\n\n // Lookahead / Lookbehind\n if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) {\n let lookbehind = false\n if (this.options.ecmaVersion >= 9) {\n lookbehind = state.eat(0x3C /* < */)\n }\n if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) {\n this.regexp_disjunction(state)\n if (!state.eat(0x29 /* ) */)) {\n state.raise(\"Unterminated group\")\n }\n state.lastAssertionIsQuantifiable = !lookbehind\n return true\n }\n }\n\n state.pos = start\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier\npp.regexp_eatQuantifier = function(state, noError = false) {\n if (this.regexp_eatQuantifierPrefix(state, noError)) {\n state.eat(0x3F /* ? */)\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix\npp.regexp_eatQuantifierPrefix = function(state, noError) {\n return (\n state.eat(0x2A /* * */) ||\n state.eat(0x2B /* + */) ||\n state.eat(0x3F /* ? */) ||\n this.regexp_eatBracedQuantifier(state, noError)\n )\n}\npp.regexp_eatBracedQuantifier = function(state, noError) {\n const start = state.pos\n if (state.eat(0x7B /* { */)) {\n let min = 0, max = -1\n if (this.regexp_eatDecimalDigits(state)) {\n min = state.lastIntValue\n if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) {\n max = state.lastIntValue\n }\n if (state.eat(0x7D /* } */)) {\n // SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term\n if (max !== -1 && max < min && !noError) {\n state.raise(\"numbers out of order in {} quantifier\")\n }\n return true\n }\n }\n if (state.switchU && !noError) {\n state.raise(\"Incomplete quantifier\")\n }\n state.pos = start\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom\npp.regexp_eatAtom = function(state) {\n return (\n this.regexp_eatPatternCharacters(state) ||\n state.eat(0x2E /* . */) ||\n this.regexp_eatReverseSolidusAtomEscape(state) ||\n this.regexp_eatCharacterClass(state) ||\n this.regexp_eatUncapturingGroup(state) ||\n this.regexp_eatCapturingGroup(state)\n )\n}\npp.regexp_eatReverseSolidusAtomEscape = function(state) {\n const start = state.pos\n if (state.eat(0x5C /* \\ */)) {\n if (this.regexp_eatAtomEscape(state)) {\n return true\n }\n state.pos = start\n }\n return false\n}\npp.regexp_eatUncapturingGroup = function(state) {\n const start = state.pos\n if (state.eat(0x28 /* ( */)) {\n if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) {\n this.regexp_disjunction(state)\n if (state.eat(0x29 /* ) */)) {\n return true\n }\n state.raise(\"Unterminated group\")\n }\n state.pos = start\n }\n return false\n}\npp.regexp_eatCapturingGroup = function(state) {\n if (state.eat(0x28 /* ( */)) {\n if (this.options.ecmaVersion >= 9) {\n this.regexp_groupSpecifier(state)\n } else if (state.current() === 0x3F /* ? */) {\n state.raise(\"Invalid group\")\n }\n this.regexp_disjunction(state)\n if (state.eat(0x29 /* ) */)) {\n state.numCapturingParens += 1\n return true\n }\n state.raise(\"Unterminated group\")\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom\npp.regexp_eatExtendedAtom = function(state) {\n return (\n state.eat(0x2E /* . */) ||\n this.regexp_eatReverseSolidusAtomEscape(state) ||\n this.regexp_eatCharacterClass(state) ||\n this.regexp_eatUncapturingGroup(state) ||\n this.regexp_eatCapturingGroup(state) ||\n this.regexp_eatInvalidBracedQuantifier(state) ||\n this.regexp_eatExtendedPatternCharacter(state)\n )\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier\npp.regexp_eatInvalidBracedQuantifier = function(state) {\n if (this.regexp_eatBracedQuantifier(state, true)) {\n state.raise(\"Nothing to repeat\")\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter\npp.regexp_eatSyntaxCharacter = function(state) {\n const ch = state.current()\n if (isSyntaxCharacter(ch)) {\n state.lastIntValue = ch\n state.advance()\n return true\n }\n return false\n}\nfunction isSyntaxCharacter(ch) {\n return (\n ch === 0x24 /* $ */ ||\n ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ ||\n ch === 0x2E /* . */ ||\n ch === 0x3F /* ? */ ||\n ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ ||\n ch >= 0x7B /* { */ && ch <= 0x7D /* } */\n )\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter\n// But eat eager.\npp.regexp_eatPatternCharacters = function(state) {\n const start = state.pos\n let ch = 0\n while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) {\n state.advance()\n }\n return state.pos !== start\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter\npp.regexp_eatExtendedPatternCharacter = function(state) {\n const ch = state.current()\n if (\n ch !== -1 &&\n ch !== 0x24 /* $ */ &&\n !(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) &&\n ch !== 0x2E /* . */ &&\n ch !== 0x3F /* ? */ &&\n ch !== 0x5B /* [ */ &&\n ch !== 0x5E /* ^ */ &&\n ch !== 0x7C /* | */\n ) {\n state.advance()\n return true\n }\n return false\n}\n\n// GroupSpecifier[U] ::\n// [empty]\n// `?` GroupName[?U]\npp.regexp_groupSpecifier = function(state) {\n if (state.eat(0x3F /* ? */)) {\n if (this.regexp_eatGroupName(state)) {\n if (state.groupNames.indexOf(state.lastStringValue) !== -1) {\n state.raise(\"Duplicate capture group name\")\n }\n state.groupNames.push(state.lastStringValue)\n return\n }\n state.raise(\"Invalid group\")\n }\n}\n\n// GroupName[U] ::\n// `<` RegExpIdentifierName[?U] `>`\n// Note: this updates `state.lastStringValue` property with the eaten name.\npp.regexp_eatGroupName = function(state) {\n state.lastStringValue = \"\"\n if (state.eat(0x3C /* < */)) {\n if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) {\n return true\n }\n state.raise(\"Invalid capture group name\")\n }\n return false\n}\n\n// RegExpIdentifierName[U] ::\n// RegExpIdentifierStart[?U]\n// RegExpIdentifierName[?U] RegExpIdentifierPart[?U]\n// Note: this updates `state.lastStringValue` property with the eaten name.\npp.regexp_eatRegExpIdentifierName = function(state) {\n state.lastStringValue = \"\"\n if (this.regexp_eatRegExpIdentifierStart(state)) {\n state.lastStringValue += codePointToString(state.lastIntValue)\n while (this.regexp_eatRegExpIdentifierPart(state)) {\n state.lastStringValue += codePointToString(state.lastIntValue)\n }\n return true\n }\n return false\n}\n\n// RegExpIdentifierStart[U] ::\n// UnicodeIDStart\n// `$`\n// `_`\n// `\\` RegExpUnicodeEscapeSequence[?U]\npp.regexp_eatRegExpIdentifierStart = function(state) {\n const start = state.pos\n let ch = state.current()\n state.advance()\n\n if (ch === 0x5C /* \\ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {\n ch = state.lastIntValue\n }\n if (isRegExpIdentifierStart(ch)) {\n state.lastIntValue = ch\n return true\n }\n\n state.pos = start\n return false\n}\nfunction isRegExpIdentifierStart(ch) {\n return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */\n}\n\n// RegExpIdentifierPart[U] ::\n// UnicodeIDContinue\n// `$`\n// `_`\n// `\\` RegExpUnicodeEscapeSequence[?U]\n// \n// \npp.regexp_eatRegExpIdentifierPart = function(state) {\n const start = state.pos\n let ch = state.current()\n state.advance()\n\n if (ch === 0x5C /* \\ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {\n ch = state.lastIntValue\n }\n if (isRegExpIdentifierPart(ch)) {\n state.lastIntValue = ch\n return true\n }\n\n state.pos = start\n return false\n}\nfunction isRegExpIdentifierPart(ch) {\n return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* */ || ch === 0x200D /* */\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape\npp.regexp_eatAtomEscape = function(state) {\n if (\n this.regexp_eatBackReference(state) ||\n this.regexp_eatCharacterClassEscape(state) ||\n this.regexp_eatCharacterEscape(state) ||\n (state.switchN && this.regexp_eatKGroupName(state))\n ) {\n return true\n }\n if (state.switchU) {\n // Make the same message as V8.\n if (state.current() === 0x63 /* c */) {\n state.raise(\"Invalid unicode escape\")\n }\n state.raise(\"Invalid escape\")\n }\n return false\n}\npp.regexp_eatBackReference = function(state) {\n const start = state.pos\n if (this.regexp_eatDecimalEscape(state)) {\n const n = state.lastIntValue\n if (state.switchU) {\n // For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape\n if (n > state.maxBackReference) {\n state.maxBackReference = n\n }\n return true\n }\n if (n <= state.numCapturingParens) {\n return true\n }\n state.pos = start\n }\n return false\n}\npp.regexp_eatKGroupName = function(state) {\n if (state.eat(0x6B /* k */)) {\n if (this.regexp_eatGroupName(state)) {\n state.backReferenceNames.push(state.lastStringValue)\n return true\n }\n state.raise(\"Invalid named reference\")\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape\npp.regexp_eatCharacterEscape = function(state) {\n return (\n this.regexp_eatControlEscape(state) ||\n this.regexp_eatCControlLetter(state) ||\n this.regexp_eatZero(state) ||\n this.regexp_eatHexEscapeSequence(state) ||\n this.regexp_eatRegExpUnicodeEscapeSequence(state) ||\n (!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) ||\n this.regexp_eatIdentityEscape(state)\n )\n}\npp.regexp_eatCControlLetter = function(state) {\n const start = state.pos\n if (state.eat(0x63 /* c */)) {\n if (this.regexp_eatControlLetter(state)) {\n return true\n }\n state.pos = start\n }\n return false\n}\npp.regexp_eatZero = function(state) {\n if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) {\n state.lastIntValue = 0\n state.advance()\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape\npp.regexp_eatControlEscape = function(state) {\n const ch = state.current()\n if (ch === 0x74 /* t */) {\n state.lastIntValue = 0x09 /* \\t */\n state.advance()\n return true\n }\n if (ch === 0x6E /* n */) {\n state.lastIntValue = 0x0A /* \\n */\n state.advance()\n return true\n }\n if (ch === 0x76 /* v */) {\n state.lastIntValue = 0x0B /* \\v */\n state.advance()\n return true\n }\n if (ch === 0x66 /* f */) {\n state.lastIntValue = 0x0C /* \\f */\n state.advance()\n return true\n }\n if (ch === 0x72 /* r */) {\n state.lastIntValue = 0x0D /* \\r */\n state.advance()\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter\npp.regexp_eatControlLetter = function(state) {\n const ch = state.current()\n if (isControlLetter(ch)) {\n state.lastIntValue = ch % 0x20\n state.advance()\n return true\n }\n return false\n}\nfunction isControlLetter(ch) {\n return (\n (ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) ||\n (ch >= 0x61 /* a */ && ch <= 0x7A /* z */)\n )\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence\npp.regexp_eatRegExpUnicodeEscapeSequence = function(state) {\n const start = state.pos\n\n if (state.eat(0x75 /* u */)) {\n if (this.regexp_eatFixedHexDigits(state, 4)) {\n const lead = state.lastIntValue\n if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) {\n const leadSurrogateEnd = state.pos\n if (state.eat(0x5C /* \\ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) {\n const trail = state.lastIntValue\n if (trail >= 0xDC00 && trail <= 0xDFFF) {\n state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000\n return true\n }\n }\n state.pos = leadSurrogateEnd\n state.lastIntValue = lead\n }\n return true\n }\n if (\n state.switchU &&\n state.eat(0x7B /* { */) &&\n this.regexp_eatHexDigits(state) &&\n state.eat(0x7D /* } */) &&\n isValidUnicode(state.lastIntValue)\n ) {\n return true\n }\n if (state.switchU) {\n state.raise(\"Invalid unicode escape\")\n }\n state.pos = start\n }\n\n return false\n}\nfunction isValidUnicode(ch) {\n return ch >= 0 && ch <= 0x10FFFF\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape\npp.regexp_eatIdentityEscape = function(state) {\n if (state.switchU) {\n if (this.regexp_eatSyntaxCharacter(state)) {\n return true\n }\n if (state.eat(0x2F /* / */)) {\n state.lastIntValue = 0x2F /* / */\n return true\n }\n return false\n }\n\n const ch = state.current()\n if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) {\n state.lastIntValue = ch\n state.advance()\n return true\n }\n\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape\npp.regexp_eatDecimalEscape = function(state) {\n state.lastIntValue = 0\n let ch = state.current()\n if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) {\n do {\n state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */)\n state.advance()\n } while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */)\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape\npp.regexp_eatCharacterClassEscape = function(state) {\n const ch = state.current()\n\n if (isCharacterClassEscape(ch)) {\n state.lastIntValue = -1\n state.advance()\n return true\n }\n\n if (\n state.switchU &&\n this.options.ecmaVersion >= 9 &&\n (ch === 0x50 /* P */ || ch === 0x70 /* p */)\n ) {\n state.lastIntValue = -1\n state.advance()\n if (\n state.eat(0x7B /* { */) &&\n this.regexp_eatUnicodePropertyValueExpression(state) &&\n state.eat(0x7D /* } */)\n ) {\n return true\n }\n state.raise(\"Invalid property name\")\n }\n\n return false\n}\nfunction isCharacterClassEscape(ch) {\n return (\n ch === 0x64 /* d */ ||\n ch === 0x44 /* D */ ||\n ch === 0x73 /* s */ ||\n ch === 0x53 /* S */ ||\n ch === 0x77 /* w */ ||\n ch === 0x57 /* W */\n )\n}\n\n// UnicodePropertyValueExpression ::\n// UnicodePropertyName `=` UnicodePropertyValue\n// LoneUnicodePropertyNameOrValue\npp.regexp_eatUnicodePropertyValueExpression = function(state) {\n const start = state.pos\n\n // UnicodePropertyName `=` UnicodePropertyValue\n if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) {\n const name = state.lastStringValue\n if (this.regexp_eatUnicodePropertyValue(state)) {\n const value = state.lastStringValue\n this.regexp_validateUnicodePropertyNameAndValue(state, name, value)\n return true\n }\n }\n state.pos = start\n\n // LoneUnicodePropertyNameOrValue\n if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) {\n const nameOrValue = state.lastStringValue\n this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue)\n return true\n }\n return false\n}\npp.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) {\n if (!UNICODE_PROPERTY_VALUES.hasOwnProperty(name) || UNICODE_PROPERTY_VALUES[name].indexOf(value) === -1) {\n state.raise(\"Invalid property name\")\n }\n}\npp.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) {\n if (UNICODE_PROPERTY_VALUES.$LONE.indexOf(nameOrValue) === -1) {\n state.raise(\"Invalid property name\")\n }\n}\n\n// UnicodePropertyName ::\n// UnicodePropertyNameCharacters\npp.regexp_eatUnicodePropertyName = function(state) {\n let ch = 0\n state.lastStringValue = \"\"\n while (isUnicodePropertyNameCharacter(ch = state.current())) {\n state.lastStringValue += codePointToString(ch)\n state.advance()\n }\n return state.lastStringValue !== \"\"\n}\nfunction isUnicodePropertyNameCharacter(ch) {\n return isControlLetter(ch) || ch === 0x5F /* _ */\n}\n\n// UnicodePropertyValue ::\n// UnicodePropertyValueCharacters\npp.regexp_eatUnicodePropertyValue = function(state) {\n let ch = 0\n state.lastStringValue = \"\"\n while (isUnicodePropertyValueCharacter(ch = state.current())) {\n state.lastStringValue += codePointToString(ch)\n state.advance()\n }\n return state.lastStringValue !== \"\"\n}\nfunction isUnicodePropertyValueCharacter(ch) {\n return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch)\n}\n\n// LoneUnicodePropertyNameOrValue ::\n// UnicodePropertyValueCharacters\npp.regexp_eatLoneUnicodePropertyNameOrValue = function(state) {\n return this.regexp_eatUnicodePropertyValue(state)\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass\npp.regexp_eatCharacterClass = function(state) {\n if (state.eat(0x5B /* [ */)) {\n state.eat(0x5E /* ^ */)\n this.regexp_classRanges(state)\n if (state.eat(0x5D /* [ */)) {\n return true\n }\n // Unreachable since it threw \"unterminated regular expression\" error before.\n state.raise(\"Unterminated character class\")\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges\n// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges\n// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash\npp.regexp_classRanges = function(state) {\n while (this.regexp_eatClassAtom(state)) {\n const left = state.lastIntValue\n if (state.eat(0x2D /* - */) && this.regexp_eatClassAtom(state)) {\n const right = state.lastIntValue\n if (state.switchU && (left === -1 || right === -1)) {\n state.raise(\"Invalid character class\")\n }\n if (left !== -1 && right !== -1 && left > right) {\n state.raise(\"Range out of order in character class\")\n }\n }\n }\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom\n// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash\npp.regexp_eatClassAtom = function(state) {\n const start = state.pos\n\n if (state.eat(0x5C /* \\ */)) {\n if (this.regexp_eatClassEscape(state)) {\n return true\n }\n if (state.switchU) {\n // Make the same message as V8.\n const ch = state.current()\n if (ch === 0x63 /* c */ || isOctalDigit(ch)) {\n state.raise(\"Invalid class escape\")\n }\n state.raise(\"Invalid escape\")\n }\n state.pos = start\n }\n\n const ch = state.current()\n if (ch !== 0x5D /* [ */) {\n state.lastIntValue = ch\n state.advance()\n return true\n }\n\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape\npp.regexp_eatClassEscape = function(state) {\n const start = state.pos\n\n if (state.eat(0x62 /* b */)) {\n state.lastIntValue = 0x08 /* */\n return true\n }\n\n if (state.switchU && state.eat(0x2D /* - */)) {\n state.lastIntValue = 0x2D /* - */\n return true\n }\n\n if (!state.switchU && state.eat(0x63 /* c */)) {\n if (this.regexp_eatClassControlLetter(state)) {\n return true\n }\n state.pos = start\n }\n\n return (\n this.regexp_eatCharacterClassEscape(state) ||\n this.regexp_eatCharacterEscape(state)\n )\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter\npp.regexp_eatClassControlLetter = function(state) {\n const ch = state.current()\n if (isDecimalDigit(ch) || ch === 0x5F /* _ */) {\n state.lastIntValue = ch % 0x20\n state.advance()\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence\npp.regexp_eatHexEscapeSequence = function(state) {\n const start = state.pos\n if (state.eat(0x78 /* x */)) {\n if (this.regexp_eatFixedHexDigits(state, 2)) {\n return true\n }\n if (state.switchU) {\n state.raise(\"Invalid escape\")\n }\n state.pos = start\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits\npp.regexp_eatDecimalDigits = function(state) {\n const start = state.pos\n let ch = 0\n state.lastIntValue = 0\n while (isDecimalDigit(ch = state.current())) {\n state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */)\n state.advance()\n }\n return state.pos !== start\n}\nfunction isDecimalDigit(ch) {\n return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits\npp.regexp_eatHexDigits = function(state) {\n const start = state.pos\n let ch = 0\n state.lastIntValue = 0\n while (isHexDigit(ch = state.current())) {\n state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch)\n state.advance()\n }\n return state.pos !== start\n}\nfunction isHexDigit(ch) {\n return (\n (ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) ||\n (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) ||\n (ch >= 0x61 /* a */ && ch <= 0x66 /* f */)\n )\n}\nfunction hexToInt(ch) {\n if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) {\n return 10 + (ch - 0x41 /* A */)\n }\n if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) {\n return 10 + (ch - 0x61 /* a */)\n }\n return ch - 0x30 /* 0 */\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence\n// Allows only 0-377(octal) i.e. 0-255(decimal).\npp.regexp_eatLegacyOctalEscapeSequence = function(state) {\n if (this.regexp_eatOctalDigit(state)) {\n const n1 = state.lastIntValue\n if (this.regexp_eatOctalDigit(state)) {\n const n2 = state.lastIntValue\n if (n1 <= 3 && this.regexp_eatOctalDigit(state)) {\n state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue\n } else {\n state.lastIntValue = n1 * 8 + n2\n }\n } else {\n state.lastIntValue = n1\n }\n return true\n }\n return false\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit\npp.regexp_eatOctalDigit = function(state) {\n const ch = state.current()\n if (isOctalDigit(ch)) {\n state.lastIntValue = ch - 0x30 /* 0 */\n state.advance()\n return true\n }\n state.lastIntValue = 0\n return false\n}\nfunction isOctalDigit(ch) {\n return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */\n}\n\n// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits\n// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit\n// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence\npp.regexp_eatFixedHexDigits = function(state, length) {\n const start = state.pos\n state.lastIntValue = 0\n for (let i = 0; i < length; ++i) {\n const ch = state.current()\n if (!isHexDigit(ch)) {\n state.pos = start\n return false\n }\n state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch)\n state.advance()\n }\n return true\n}\n","import {isIdentifierStart, isIdentifierChar} from \"./identifier\"\nimport {types as tt, keywords as keywordTypes} from \"./tokentype\"\nimport {Parser} from \"./state\"\nimport {SourceLocation} from \"./locutil\"\nimport {RegExpValidationState} from \"./regexp\"\nimport {lineBreak, lineBreakG, isNewLine, nonASCIIwhitespace} from \"./whitespace\"\n\n// Object type used to represent tokens. Note that normally, tokens\n// simply exist as properties on the parser object. This is only\n// used for the onToken callback and the external tokenizer.\n\nexport class Token {\n constructor(p) {\n this.type = p.type\n this.value = p.value\n this.start = p.start\n this.end = p.end\n if (p.options.locations)\n this.loc = new SourceLocation(p, p.startLoc, p.endLoc)\n if (p.options.ranges)\n this.range = [p.start, p.end]\n }\n}\n\n// ## Tokenizer\n\nconst pp = Parser.prototype\n\n// Move to the next token\n\npp.next = function() {\n if (this.options.onToken)\n this.options.onToken(new Token(this))\n\n this.lastTokEnd = this.end\n this.lastTokStart = this.start\n this.lastTokEndLoc = this.endLoc\n this.lastTokStartLoc = this.startLoc\n this.nextToken()\n}\n\npp.getToken = function() {\n this.next()\n return new Token(this)\n}\n\n// If we're in an ES6 environment, make parsers iterable\nif (typeof Symbol !== \"undefined\")\n pp[Symbol.iterator] = function() {\n return {\n next: () => {\n let token = this.getToken()\n return {\n done: token.type === tt.eof,\n value: token\n }\n }\n }\n }\n\n// Toggle strict mode. Re-reads the next number or string to please\n// pedantic tests (`\"use strict\"; 010;` should fail).\n\npp.curContext = function() {\n return this.context[this.context.length - 1]\n}\n\n// Read a single token, updating the parser object's token-related\n// properties.\n\npp.nextToken = function() {\n let curContext = this.curContext()\n if (!curContext || !curContext.preserveSpace) this.skipSpace()\n\n this.start = this.pos\n if (this.options.locations) this.startLoc = this.curPosition()\n if (this.pos >= this.input.length) return this.finishToken(tt.eof)\n\n if (curContext.override) return curContext.override(this)\n else this.readToken(this.fullCharCodeAtPos())\n}\n\npp.readToken = function(code) {\n // Identifier or keyword. '\\uXXXX' sequences are allowed in\n // identifiers, so '\\' also dispatches to that.\n if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\\' */)\n return this.readWord()\n\n return this.getTokenFromCode(code)\n}\n\npp.fullCharCodeAtPos = function() {\n let code = this.input.charCodeAt(this.pos)\n if (code <= 0xd7ff || code >= 0xe000) return code\n let next = this.input.charCodeAt(this.pos + 1)\n return (code << 10) + next - 0x35fdc00\n}\n\npp.skipBlockComment = function() {\n let startLoc = this.options.onComment && this.curPosition()\n let start = this.pos, end = this.input.indexOf(\"*/\", this.pos += 2)\n if (end === -1) this.raise(this.pos - 2, \"Unterminated comment\")\n this.pos = end + 2\n if (this.options.locations) {\n lineBreakG.lastIndex = start\n let match\n while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {\n ++this.curLine\n this.lineStart = match.index + match[0].length\n }\n }\n if (this.options.onComment)\n this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,\n startLoc, this.curPosition())\n}\n\npp.skipLineComment = function(startSkip) {\n let start = this.pos\n let startLoc = this.options.onComment && this.curPosition()\n let ch = this.input.charCodeAt(this.pos += startSkip)\n while (this.pos < this.input.length && !isNewLine(ch)) {\n ch = this.input.charCodeAt(++this.pos)\n }\n if (this.options.onComment)\n this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,\n startLoc, this.curPosition())\n}\n\n// Called at the start of the parse and after every token. Skips\n// whitespace and comments, and.\n\npp.skipSpace = function() {\n loop: while (this.pos < this.input.length) {\n let ch = this.input.charCodeAt(this.pos)\n switch (ch) {\n case 32: case 160: // ' '\n ++this.pos\n break\n case 13:\n if (this.input.charCodeAt(this.pos + 1) === 10) {\n ++this.pos\n }\n case 10: case 8232: case 8233:\n ++this.pos\n if (this.options.locations) {\n ++this.curLine\n this.lineStart = this.pos\n }\n break\n case 47: // '/'\n switch (this.input.charCodeAt(this.pos + 1)) {\n case 42: // '*'\n this.skipBlockComment()\n break\n case 47:\n this.skipLineComment(2)\n break\n default:\n break loop\n }\n break\n default:\n if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {\n ++this.pos\n } else {\n break loop\n }\n }\n }\n}\n\n// Called at the end of every token. Sets `end`, `val`, and\n// maintains `context` and `exprAllowed`, and skips the space after\n// the token, so that the next one's `start` will point at the\n// right position.\n\npp.finishToken = function(type, val) {\n this.end = this.pos\n if (this.options.locations) this.endLoc = this.curPosition()\n let prevType = this.type\n this.type = type\n this.value = val\n\n this.updateContext(prevType)\n}\n\n// ### Token reading\n\n// This is the function that is called to fetch the next token. It\n// is somewhat obscure, because it works in character codes rather\n// than characters, and because operator parsing has been inlined\n// into it.\n//\n// All in the name of speed.\n//\npp.readToken_dot = function() {\n let next = this.input.charCodeAt(this.pos + 1)\n if (next >= 48 && next <= 57) return this.readNumber(true)\n let next2 = this.input.charCodeAt(this.pos + 2)\n if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'\n this.pos += 3\n return this.finishToken(tt.ellipsis)\n } else {\n ++this.pos\n return this.finishToken(tt.dot)\n }\n}\n\npp.readToken_slash = function() { // '/'\n let next = this.input.charCodeAt(this.pos + 1)\n if (this.exprAllowed) { ++this.pos; return this.readRegexp() }\n if (next === 61) return this.finishOp(tt.assign, 2)\n return this.finishOp(tt.slash, 1)\n}\n\npp.readToken_mult_modulo_exp = function(code) { // '%*'\n let next = this.input.charCodeAt(this.pos + 1)\n let size = 1\n let tokentype = code === 42 ? tt.star : tt.modulo\n\n // exponentiation operator ** and **=\n if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) {\n ++size\n tokentype = tt.starstar\n next = this.input.charCodeAt(this.pos + 2)\n }\n\n if (next === 61) return this.finishOp(tt.assign, size + 1)\n return this.finishOp(tokentype, size)\n}\n\npp.readToken_pipe_amp = function(code) { // '|&'\n let next = this.input.charCodeAt(this.pos + 1)\n if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)\n if (next === 61) return this.finishOp(tt.assign, 2)\n return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)\n}\n\npp.readToken_caret = function() { // '^'\n let next = this.input.charCodeAt(this.pos + 1)\n if (next === 61) return this.finishOp(tt.assign, 2)\n return this.finishOp(tt.bitwiseXOR, 1)\n}\n\npp.readToken_plus_min = function(code) { // '+-'\n let next = this.input.charCodeAt(this.pos + 1)\n if (next === code) {\n if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 &&\n (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {\n // A `-->` line comment\n this.skipLineComment(3)\n this.skipSpace()\n return this.nextToken()\n }\n return this.finishOp(tt.incDec, 2)\n }\n if (next === 61) return this.finishOp(tt.assign, 2)\n return this.finishOp(tt.plusMin, 1)\n}\n\npp.readToken_lt_gt = function(code) { // '<>'\n let next = this.input.charCodeAt(this.pos + 1)\n let size = 1\n if (next === code) {\n size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2\n if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)\n return this.finishOp(tt.bitShift, size)\n }\n if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&\n this.input.charCodeAt(this.pos + 3) === 45) {\n // `` line comment\n this.skipLineComment(3)\n this.skipSpace()\n return this.nextToken()\n }\n return this.finishOp(tt.incDec, 2)\n }\n if (next === 61) return this.finishOp(tt.assign, 2)\n return this.finishOp(tt.plusMin, 1)\n}\n\npp.readToken_lt_gt = function(code) { // '<>'\n let next = this.input.charCodeAt(this.pos + 1)\n let size = 1\n if (next === code) {\n size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2\n if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)\n return this.finishOp(tt.bitShift, size)\n }\n if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&\n this.input.charCodeAt(this.pos + 3) === 45) {\n // `