[es6] Re-implement rest parameters via desugaring.

test/mjsunit/harmony/arrow-rest-params-lazy-parsing.js

Index: test/mjsunit/harmony/arrow-rest-params-lazy-parsing.js
diff --git a/test/mjsunit/harmony/arrow-rest-params.js b/test/mjsunit/harmony/arrow-rest-params-lazy-parsing.js
similarity index 95%
copy from test/mjsunit/harmony/arrow-rest-params.js
copy to test/mjsunit/harmony/arrow-rest-params-lazy-parsing.js
index 0ee77390ed21496f590de890686891c29e7c3f96..6e760fcb17cedc5f9a8aa685ca2484a13ab563fb 100644
--- a/test/mjsunit/harmony/arrow-rest-params.js
+++ b/test/mjsunit/harmony/arrow-rest-params-lazy-parsing.js
@@ -1,8 +1,9 @@
-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2015 the V8 project authors. All rights reserved.

[wingo, 2015/08/31 13:07:31]

IIRC we don't update these lines; Adam?

[caitp (gmail), 2015/08/31 13:23:40]

This isn't really an update, it's a new file

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --harmony-rest-parameters --harmony-arrow-functions
+// Flags: --min-preparse-length=0
 
 (function testRestIndex() {
   assertEquals(5, ((...args) => args.length)(1,2,3,4,5));
@@ -18,7 +19,7 @@
 //
 //   strictTest(6,5,4,3,2,1)
 //
-var strictTest = (() => {
+var strictTest = (function() {

[wingo, 2015/08/31 13:07:31]

Why this change?

[caitp (gmail), 2015/08/31 13:23:40]

It's not legal to have a language mode directive in a function with a rest
parameter

   "use strict";
   return (a, b, ...c) => {
     assertEquals(Array, c.constructor);
@@ -43,7 +44,7 @@ var sloppyTest = (a, b, ...c) => {
   for (var i = 2; i < a; ++i) {
     assertEquals(c[i - 2], a - i);
   }
-}
+};
 
 
 var O = {
@@ -99,7 +100,7 @@ var O = {
 })();
 
 
-(function testRestParamssloppyMode() {
+(function testRestParamsSloppyMode() {
   sloppyTest();
   sloppyTest(2, 1);
   sloppyTest(6, 5, 4, 3, 2, 1);