Implement function proxies (except for their use as constructors).

src/objects.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 67 matching lines @@
     return CreateJSValue(global_context->boolean_function(), this);
   } else if (IsString()) {
     return CreateJSValue(global_context->string_function(), this);
   }
   ASSERT(IsJSObject());
   return this;
 }
 
 
 MaybeObject* Object::ToObject() {
-  if (IsJSObject()) {
+  if (IsJSReceiver()) {
     return this;
   } else if (IsNumber()) {
     Isolate* isolate = Isolate::Current();
     Context* global_context = isolate->context()->global_context();
     return CreateJSValue(global_context->number_function(), this);
   } else if (IsBoolean()) {
     Isolate* isolate = HeapObject::cast(this)->GetIsolate();
     Context* global_context = isolate->context()->global_context();
     return CreateJSValue(global_context->boolean_function(), this);
   } else if (IsString()) {
@@ skipping 522 matching lines @@
       if (!heap_object->IsJSObject()) {
         Isolate* isolate = heap->isolate();
         Context* global_context = isolate->context()->global_context();
         if (heap_object->IsString()) {
           holder = global_context->string_function()->instance_prototype();
         } else if (heap_object->IsHeapNumber()) {
           holder = global_context->number_function()->instance_prototype();
         } else if (heap_object->IsBoolean()) {
           holder = global_context->boolean_function()->instance_prototype();
         } else if (heap_object->IsJSProxy()) {
+          // TODO(rossberg): do something
           return heap->undefined_value();  // For now...
         } else {
           // Undefined and null have no indexed properties.
           ASSERT(heap_object->IsUndefined() || heap_object->IsNull());
           return heap->undefined_value();
         }
       }
     }
 
     // Inline the case for JSObjects. Doing so significantly improves the
@@ skipping 525 matching lines @@
         accumulator->Add("<false>");
       else
         accumulator->Add("<Odd Oddball>");
       break;
     }
     case HEAP_NUMBER_TYPE:
       accumulator->Add("<Number: ");
       HeapNumber::cast(this)->HeapNumberPrint(accumulator);
       accumulator->Put('>');
       break;
+    case JS_PROXY_TYPE:
+      accumulator->Add("<JSProxy>");
+      break;
+    case JS_FUNCTION_PROXY_TYPE:
+      accumulator->Add("<JSFunctionProxy>");
+      break;
     case FOREIGN_TYPE:
       accumulator->Add("<Foreign>");
       break;
     case JS_GLOBAL_PROPERTY_CELL_TYPE:
       accumulator->Add("Cell for ");
       JSGlobalPropertyCell::cast(this)->value()->ShortPrint(accumulator);
       break;
     default:
       accumulator->Add("<Other heap object (%d)>", map()->instance_type());
       break;
@@ skipping 55 matching lines @@
     case JS_FUNCTION_TYPE:
       reinterpret_cast<JSFunction*>(this)
           ->JSFunctionIterateBody(object_size, v);
       break;
     case ODDBALL_TYPE:
       Oddball::BodyDescriptor::IterateBody(this, v);
       break;
     case JS_PROXY_TYPE:
       JSProxy::BodyDescriptor::IterateBody(this, v);
       break;
+    case JS_FUNCTION_PROXY_TYPE:
+      JSFunctionProxy::BodyDescriptor::IterateBody(this, v);
+      break;
     case FOREIGN_TYPE:
       reinterpret_cast<Foreign*>(this)->ForeignIterateBody(v);
       break;
     case MAP_TYPE:
       Map::BodyDescriptor::IterateBody(this, v);
       break;
     case CODE_TYPE:
       reinterpret_cast<Code*>(this)->CodeIterateBody(v);
       break;
     case JS_GLOBAL_PROPERTY_CELL_TYPE:
@@ skipping 1101 matching lines @@
   USE(result);
   return NONE;
 }
 
 
 void JSProxy::Fix() {
   Isolate* isolate = GetIsolate();
   HandleScope scope(isolate);
   Handle<JSProxy> self(this);
 
-  isolate->factory()->BecomeJSObject(self);
+  if (IsJSFunctionProxy()) {
+    isolate->factory()->BecomeJSFunction(self);
+    // Code will be set on the JavaScript side.
+  } else {
+    isolate->factory()->BecomeJSObject(self);
+  }
   ASSERT(self->IsJSObject());
-  // TODO(rossberg): recognize function proxies.
 }
 
 
 
 MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
                                             String* name,
                                             Object* value,
                                             PropertyAttributes attributes,
                                             StrictModeFlag strict_mode) {
   Heap* heap = GetHeap();
@@ skipping 9197 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single break point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal