[es6] Initial steps towards a correct implementation of IsCallable.

src/collection.js

 // Copyright 2012 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.
 
 var $getHash;
 var $getExistingHash;
 
 (function(global, utils) {
 "use strict";
 
@@ skipping 115 matching lines @@
 
 function SetConstructor(iterable) {
   if (!%_IsConstructCall()) {
     throw MakeTypeError(kConstructorNotFunction, "Set");
   }
 
   %_SetInitialize(this);
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     var adder = this.add;
-    if (!IS_SPEC_FUNCTION(adder)) {
+    if (!IS_CALLABLE(adder)) {
       throw MakeTypeError(kPropertyNotFunction, 'add', this);
     }
 
     for (var value of iterable) {
       %_CallFunction(this, value, adder);
     }
   }
 }
 
 
@@ skipping 90 matching lines @@
   %_SetClear(this);
 }
 
 
 function SetForEach(f, receiver) {
   if (!IS_SET(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         'Set.prototype.forEach', this);
   }
 
-  if (!IS_SPEC_FUNCTION(f)) throw MakeTypeError(kCalledNonCallable, f);
+  if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
   var needs_wrapper = false;
   if (IS_NULL(receiver)) {
     if (%IsSloppyModeFunction(f)) receiver = UNDEFINED;
   } else if (!IS_UNDEFINED(receiver)) {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var iterator = new SetIterator(this, ITERATOR_KIND_VALUES);
   var key;
   var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
@@ skipping 33 matching lines @@
 
 function MapConstructor(iterable) {
   if (!%_IsConstructCall()) {
     throw MakeTypeError(kConstructorNotFunction, "Map");
   }
 
   %_MapInitialize(this);
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     var adder = this.set;
-    if (!IS_SPEC_FUNCTION(adder)) {
+    if (!IS_CALLABLE(adder)) {
       throw MakeTypeError(kPropertyNotFunction, 'set', this);
     }
 
     for (var nextItem of iterable) {
       if (!IS_SPEC_OBJECT(nextItem)) {
         throw MakeTypeError(kIteratorValueNotAnObject, nextItem);
       }
       %_CallFunction(this, nextItem[0], nextItem[1], adder);
     }
   }
@@ skipping 116 matching lines @@
   %_MapClear(this);
 }
 
 
 function MapForEach(f, receiver) {
   if (!IS_MAP(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         'Map.prototype.forEach', this);
   }
 
-  if (!IS_SPEC_FUNCTION(f)) throw MakeTypeError(kCalledNonCallable, f);
+  if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
   var needs_wrapper = false;
   if (IS_NULL(receiver)) {
     if (%IsSloppyModeFunction(f)) receiver = UNDEFINED;
   } else if (!IS_UNDEFINED(receiver)) {
     needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver);
   }
 
   var iterator = new MapIterator(this, ITERATOR_KIND_ENTRIES);
   var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f);
   var value_array = [UNDEFINED, UNDEFINED];
@@ skipping 59 matching lines @@
   "map_has", MapHas,
   "map_delete", MapDelete,
   "set_add", SetAdd,
   "set_has", SetHas,
   "set_delete", SetDelete,
   "map_from_array", MapFromArray,
   "set_from_array",SetFromArray,
 ]);
 
 })