Support implicit iterable interfaces

[saschanaz]

This generates a new dom.es6.generated.d.ts which contains [Symbol.iterator] index signature for some interfaces. ('es6' because it should ultimately support setlike and maplike which will add some methods including keys() values() entries() etc.)

Copying from microsoft/TypeScript#5329:

WebIDL says:

If the interface has any of the following:

• an iterable declaration
• an indexed property getter and an integer-typed attribute named “length”
• a maplike declaration
• a setlike declaration

then a property must exist whose name is the @@iterator symbol, with attributes { [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true } and whose value is a function object.

Chromium on April 2016 implemented and merged the change based on the criteria number 2.

This means we can add [Symbol.iterator] key for some interfaces and also means that TSJS-lib-generator can automatically add the key but without methods e.g. values().

[mhegazy]

i would remove MSEdge / IE alltogether.

[mhegazy]

@saschanaz we need to come up with a way to merge this with dom.iterable.d.ts in src/lib in the ts repo.

[mhegazy]

does not seem itrable, https://www.w3.org/TR/DOM-Level-3-Core/core.html#DOMStringList

[saschanaz]

It meets the standard on WHATWG spec:

interface DOMStringList {
  readonly attribute unsigned long length;
  getter DOMString? item(unsigned long index);
  boolean contains(DOMString string);
};

It has 1. an indexed property getter and 2. an integer-typed attribute named “length”.

[saschanaz]

we need to come up with a way to merge this with dom.iterable.d.ts in src/lib in the ts repo.

That file should ultimately be completely replaced by generated one, once we get #227 merged (as current input xml file does not have every needed data). I think we have two options, we can:

1. have two files temporarily and merge it on TS builder side
2. support manual type adding as current addedTypes.json does and remove dom.iterable.d.ts completely

[saschanaz]

I'm not sure what happened on Travis side.

[mhegazy]

new mono 5.0, not sure why..