[destructuring] Implement basic binding destructuring infrastructure

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
+
+(function TestObjectLiteralPattern() {
+  var { x : x, y : y } = { x : 1, y : 2 };
+  assertEquals(1, x);
+  assertEquals(2, y);
+
+  var {z} = { z : 3 };

[arv (Not doing code reviews), 2015/05/11 14:25:16]

Maybe add let and const tests too and add TDZ check.


let {x, y} = {x: 1, y};
                    ^
                   TDZ

[Dmitry Lomov (no reviews), 2015/05/11 14:53:26]

This CL is just a rudimentary implementation of destructuring, for
proof-of-concept. I'll expand on implemenattion and tests in subsequent CLs

+  assertEquals(3, z);
+}());