Support `ExportSpecifierSet` being `"*"`.

[domenic]

export * from "crypto";

should transpile to something like

var __dependency1__ = require("crypto");
Object.getOwnPropertyNames(__dependency1__).forEach(function (x) {
    exports[x] = __dependency1__[x];
});

[domenic]

Per @dherman at https://twitter.com/littlecalculist/status/360052538051014656, export * does not shadow any other exports, so we'll need to transpile

export var whatevs;
export * from "crypto";

to something like

var whatevs;
exports.whatevs = whatevs;

var __dependency1__ = require("crypto");
var __knownExports__ = Object.getOwnPropertyNames(exports);
Object.getOwnPropertyNames(__dependency1__).forEach(function (x) {
    if (__knownExports__.indexOf(x) === -1) {
        exports[x] = __dependency1__[x];
    }
});

[jdalton]

I think currently export foo from './foo'; isn't supported either.

[eventualbuddha]

This is still unsupported in v0.5.1. It's not a big priority for me, but if anyone wants to take a stab at it I'll review a PR.

[sandstrom]

Similarly, it seems import * as ajax from '../utils/ajax' doesn't work either[1].

[1] http://www.2ality.com/2014/09/es6-modules-final.html

[caridy]

@jdalton export foo from './foo'; is invalid.

@sandstrom import * as ajax from '../utils/ajax' is coming as part of the refactor we are working on as a result of the latest update in esprima: https://github.com/ariya/esprima/pull/287

[sandstrom]

@caridy Awesome!

With some web standards it's painful to wait the 5+ years until adoption is high. The transpiler feels like an awesome time-machine, making it available today 😄

[jdalton]

@jdalton export foo from './foo'; is invalid.

Amazing what a year will do :P

[caridy]

@jdalton yeah, we left that one out because it is ambiguous, instead, you can use export {default as foo} from "./foo";, we will revisit the export-from grammar post ES6. For now, we only have two options for it:

export * FromClause ;
export ExportClause FromClause ;

more details here:
https://people.mozilla.org/~jorendorff/es6-draft.html#sec-exports

[caridy]

@sandstrom import * as foo from "foo"; is supported now. We will work on export * from "foo" next.

[sandstrom]

@caridy awesome! ⛵