Implement .every() on typed arrays

src/harmony-typedarray.js

Index: src/harmony-typedarray.js
diff --git a/src/harmony-typedarray.js b/src/harmony-typedarray.js
index 014206c4cba8400cf745b9295d5cb223695ad6cb..b09d4e8373ebf2c72806764c9d5a0202329ae25a 100644
--- a/src/harmony-typedarray.js
+++ b/src/harmony-typedarray.js
@@ -59,6 +59,41 @@ function NAMEForEach(f /* thisArg */) {  // length == 1
   }
 }
 
+// ES6 draft 09-14-14, section 22.2.3.7
+function NAMEEvery(f /* thisArg */) {  // length == 1
+  if (!%IsTypedArray(this)) {
+    throw MakeTypeError('not_typed_array', []);
+  }
+  if (!IS_SPEC_FUNCTION(f)) {
+    throw MakeTypeError('called_non_callable', [ f ]);
+  }
+
+  var length = %_TypedArrayGetLength(this);
+  var receiver;
+
+  if (%_ArgumentsLength() > 1) {
+    receiver = %_Arguments(1);
+  }
+
+  var needs_wrapper = false;
+  if (IS_NULL_OR_UNDEFINED(receiver)) {
+    receiver = %GetDefaultReceiver(f) || receiver;
+  } else {
+    needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
+  }
+
+  var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
+  for (var i = 0; i < length; i++) {
+    var element = this[i];
+    // Prepare break slots for debugger step in.
+    if (stepping) %DebugPrepareStepInIfStepping(f);
+    var new_receiver = needs_wrapper ? ToObject(receiver) : receiver;
+    if (!%_CallFunction(new_receiver, TO_OBJECT_INLINE(element), i, this, f))
+      return false;
+  }
+  return true;
+}
+
 // ES6 draft 08-24-14, section 22.2.2.2
 function NAMEOf() {  // length == 0
   var length = %_ArgumentsLength();
@@ -84,8 +119,9 @@ macro EXTEND_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE)
   ));
 
   // Set up non-enumerable functions on the prototype object.
-  InstallFunctions(global.NAME.prototype, DONT_ENUM, $Array(
-    "forEach", NAMEForEach
+  InstallFunctions(global.NAME.prototype, DONT_ENUM | DONT_DELETE | READ_ONLY, $Array(
+    "forEach", NAMEForEach,
+    "every", NAMEEvery
   ));
 endmacro