New: Rest Parameter (refs: #10)

[xjamundx]

• test from harmony ported over
• additional tests
• error tests

[xjamundx]

didn't mean to commit this, but it's really helpful for debugging. (will remove :))

[xjamundx]

Just have one broken test now. Some slightly different line numbers for arrowFunctions:

      AssertionError: expected { Object (type, body, ...) } to deeply equal { Object (type, body, ...) }
      + expected - actual

                       "column": 26
                       "line": 1
                     }
                     "start": {
      +                "column": 19
      -                "column": 20
                       "line": 1
                     }
                   }
                   "range": [
      +              19
      -              20
                     26
                   ]
                   "type": "SequenceExpression"
                 }

[xjamundx]

Works now and a bunch of Spread stuff in there, because there is some overlap. Will attack spread next.

[nzakas]

What about FunctionExpression and FunctionDeclaration?

[xjamundx]

I think it was actually already there, but I'll add some more tests!

[nzakas]

Looks like you're missing changes to support rest params in FunctionDeclaration and FunctionExpression.

[xjamundx]

We now have tests for var x = function(...b) {} and function x(...b){} and a few variations....

[nzakas]

Huh, secret implementation details revealed. Looks good!