Implement CallAsConstructor method for Object in the API

src/api.cc

 // Copyright 2011 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 3268 matching lines @@
     recv_obj = obj;
   }
   EXCEPTION_PREAMBLE(isolate);
   i::Handle<i::Object> returned =
       i::Execution::Call(fun, recv_obj, argc, args, &has_pending_exception);
   EXCEPTION_BAILOUT_CHECK(isolate, Local<Value>());
   return scope.Close(Utils::ToLocal(returned));
 }
 
 
+Local<v8::Object> Object::CallAsConstructor(
+    int argc,
+    v8::Handle<v8::Value> argv[]) const {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate, "v8::Object::CallAsConstructor()",
+             return Local<v8::Object>());
+  LOG_API(isolate, "Object::CallAsConstructor");
+  ENTER_V8(isolate);
+  HandleScope scope;

[Mads Ager (chromium), 2011/05/05 09:03:33]

Use the isolate here.

+  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
+  STATIC_ASSERT(sizeof(v8::Handle<v8::Value>) == sizeof(i::Object**));
+  i::Object*** args = reinterpret_cast<i::Object***>(argv);
+  i::Handle<i::Object> returned;
+  i::Handle<i::JSFunction> fun;
+  EXCEPTION_PREAMBLE(isolate);
+  if (obj->IsJSFunction()) {
+    fun = i::Handle<i::JSFunction>::cast(obj);
+    returned = i::Execution::New(fun, argc, args, &has_pending_exception);
+    EXCEPTION_BAILOUT_CHECK(isolate, Local<v8::Object>());
+  } else {
+    i::Handle<i::Object> delegate =
+        i::Execution::TryGetConstructorDelegate(obj, &has_pending_exception);
+    EXCEPTION_BAILOUT_CHECK(isolate, Local<v8::Object>());
+    fun = i::Handle<i::JSFunction>::cast(delegate);
+    returned =
+        i::Execution::Call(fun, obj, argc, args, &has_pending_exception);
+    EXCEPTION_BAILOUT_CHECK(isolate, Local<v8::Object>());
+  }
+  return scope.Close(Utils::ToLocal(i::Handle<i::JSObject>::cast(returned)));

[Mads Ager (chromium), 2011/05/05 09:03:33]

Let's remove the cast to JSObject here. The function delegate can return a
string or number which is not a JSObject?

+}
+
+
 Local<v8::Object> Function::NewInstance() const {
   return NewInstance(0, NULL);
 }
 
 
 Local<v8::Object> Function::NewInstance(int argc,
                                         v8::Handle<v8::Value> argv[]) const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Function::NewInstance()",
              return Local<v8::Object>());
@@ skipping 2493 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* scope_implementer =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   scope_implementer->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal