[destructuring] Grand for statement parsing unification.

test/mjsunit/harmony/destructuring.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Flags: --harmony-destructuring --harmony-computed-property-names
 
 (function TestObjectLiteralPattern() {
   var { x : x, y : y } = { x : 1, y : 2 };
   assertEquals(1, x);
   assertEquals(2, y);
@@ skipping 638 matching lines @@
   o.__proto__ = null;
   let sx = '';
   let sy = '';
   for (let [x,y] in o) {
     sx += x;
     sy += y;
   }
   assertEquals('ab', sx);
   assertEquals('12', sy);
 }());
+
+
+(function TestForEachVars() {
+  var a = [{x:1, y:-1}, {x:2,y:-2}, {x:3,y:-3}];
+  var sumX = 0;
+  var sumY = 0;
+  var fs = [];
+  for (var {x,y} of a) {
+    sumX += x;
+    sumY += y;
+    fs.push({fx : function() { return x; }, fy : function() { return y }});
+  }
+  assertSame(6, sumX);
+  assertSame(-6, sumY);
+  assertSame(3, fs.length);
+  for (var i = 0; i < fs.length; i++) {
+    var {fx,fy} = fs[i];
+    assertSame(3, fx());
+    assertSame(-3, fy());
+  }
+
+  var o = { 'a1':1, 'b2':2 };

[arv (Not doing code reviews), 2015/05/21 16:37:01]

var o = {__proto__: null, ...};

[Dmitry Lomov (no reviews), 2015/05/21 17:07:33]

Done.

+  o.__proto__ = null;
+  var sx = '';
+  var sy = '';
+  for (var [x,y] in o) {
+    sx += x;
+    sy += y;
+  }
+  assertEquals('ab', sx);
+  assertEquals('12', sy);
+}());