1044462 - Reflect.parse: Support newest export syntax

Status: NEW

(Core :: JavaScript Engine, defect)

Description

[Ingvar Stepanyan (RReverser)]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 (Beta/Release)
Build ID: 20140721004001

Steps to reproduce:

As per http://people.mozilla.org/~jorendorff/es6-draft.html#sec-exports, `export default (AssignmentExpression)` should be supported as export declaration.

Also, parsing `export *` should produce an error when it's not followed by `from "..."` clause.


Actual results:

Currently, neither is supported in Reflect.parse and Esprima.


Expected results:

For `export default (AssignmentExpression)`, I propose to use AST from early Esprima version that is used in https://github.com/square/es6-module-transpiler and landed in same representation in Acorn:

{
    type: "ExportDeclaration",
    declaration: ...(assignment expression)...,
    default: true,
    specifiers: null,
    source: null
}

Comment 1

[Jason Orendorff [:jorendorff]]

That representation seems fine to me right now, but i'm not looking at the spec (no time at the moment).