commit 2b3823f4a9309c23b0b1d1c0faa31df5f9a24c54
author Olivier Chafik <ochafik@google.com> Wed Feb 10 18:22:21 2016
committer Olivier Chafik <ochafik@google.com> Wed Feb 10 18:22:21 2016
tree f9dd649fba376a087a273ed59d25911838e0b703
parent 1a679da972494215f68067ce52f36fd5fcecfaef

Emit TypeScript / Closure ES6_TYPED type annotations in --closure mode (instead of closure comments).

- Replaced ClosureType by a general JS.TypeRef, used in AST for identifier types, return types
- Convert DartType to JS.TypeRef (in mixin JsTypeRefCodegen), including type parameters (also added to AST in Fun & ClassExpression)
- Emit field declarations expected by TS
- Wrote a TypeScriptTypePrinter (mixed in by Printer) and a ClosureTypePrinter (might disappear soon)
- Simplified annotation code, called in more places (seems to gives more source info)

Example input:

  List/*<T>*/ func/*<T>*/(List/*<T>*/ items, dynamic/*=T*/ seed) {}

  class Foo<T> {
    int i;
    static var x;
    Foo(this.i, o, {String v : "?"}) {}
  }

Output:

  function func<T>(items: core.List<T>, seed: T): core.List<T> {}

  const Foo$ = dart.generic(function(T) {
    class Foo<T> extends core.Object {
      i: number;
      static x;
      Foo(i: number, o, {v = "?"}: {v?: string} = {}) {
        this.i = i;
      }
    }
    ...
    Foo.x = null;
    return Foo;
  });

Known remaining issues:
- typedefs expect a `type Callback = (...) => ...;` statement
- `exports` is a reserved keyword in TS (either we change the way we do exports, or we'll need a different temp + extra type annotations of the default-exported object).
- Generic type is currently locked inside the generic call. Might be able to solve by exporting signatures in .d.ts file, or changing the way we do generics.

BUG=
R=jmesserly@google.com

Review URL: https://codereview.chromium.org/1676463002 .