ES6 symbols: extend V8 API to support symbols

src/handles.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 234 matching lines @@
                                 PropertyAttributes attributes) {
   Isolate* isolate = object->GetIsolate();
   CALL_HEAP_FUNCTION(
       isolate,
       Runtime::ForceSetObjectProperty(
           isolate, object, key, value, attributes),
       Object);
 }
 
 
+Handle<Object> DeleteProperty(Handle<JSObject> object, Handle<Object> key) {
+  Isolate* isolate = object->GetIsolate();
+  CALL_HEAP_FUNCTION(isolate,
+                     Runtime::DeleteObjectProperty(
+                         isolate, object, key, JSReceiver::NORMAL_DELETION),
+                     Object);
+}
+
+
 Handle<Object> ForceDeleteProperty(Handle<JSObject> object,
                                    Handle<Object> key) {
   Isolate* isolate = object->GetIsolate();
   CALL_HEAP_FUNCTION(isolate,
-                     Runtime::ForceDeleteObjectProperty(isolate, object, key),
+                     Runtime::DeleteObjectProperty(
+                         isolate, object, key, JSReceiver::FORCE_DELETION),
                      Object);
 }
 
 
+Handle<Object> HasProperty(Handle<JSReceiver> obj, Handle<Object> key) {
+  Isolate* isolate = obj->GetIsolate();
+  CALL_HEAP_FUNCTION(isolate,
+                     Runtime::HasObjectProperty(isolate, obj, key), Object);
+}
+
+
 Handle<Object> GetProperty(Handle<JSReceiver> obj,
                            const char* name) {
   Isolate* isolate = obj->GetIsolate();
   Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
   CALL_HEAP_FUNCTION(isolate, obj->GetProperty(*str), Object);
 }
 
 
 Handle<Object> GetProperty(Isolate* isolate,
                            Handle<Object> obj,
@@ skipping 629 matching lines @@
   data->next = prev_next_;
   data->limit = prev_limit_;
 #ifdef DEBUG
   handles_detached_ = true;
 #endif
   return deferred;
 }
 
 
 } }  // namespace v8::internal