Implement ES6 Array.of()

src/harmony-array.js

Index: src/harmony-array.js
diff --git a/src/harmony-array.js b/src/harmony-array.js
index dbcb292a0876842e8d3a6d4c0d21d997cdf6d977..88b878f0a76ef594f64f7905d61459c05749724b 100644
--- a/src/harmony-array.js
+++ b/src/harmony-array.js
@@ -123,11 +123,29 @@ function ArrayFill(value /* [, start [, end ] ] */) {  // length == 1
   return array;
 }
 
+// ES6, draft 05-22-14, section 22.1.2.3
+function ArrayOf() {
+  var length = %_ArgumentsLength();
+  var constructor = this;
+  // TODO: Implement IsConstructor (ES6 section 7.2.5)
+  var array = IS_SPEC_FUNCTION(constructor) ? new constructor(length) : [];
+  for (var i = 0; i < length; i++) {
+    %AddElement(array, i, %_Arguments(i), NONE);
+  }
+  array.length = length;
+  return array;
+}
+
 // -------------------------------------------------------------------
 
 function HarmonyArrayExtendArrayPrototype() {
   %CheckIsBootstrapping();
 
+  // Set up non-enumerable functions on the Array object.
+  InstallFunctions($Array, DONT_ENUM, $Array(
+    "of", ArrayOf
+  ));
+
   // Set up the non-enumerable functions on the Array prototype object.
   InstallFunctions($Array.prototype, DONT_ENUM, $Array(
     "find", ArrayFind,