Handlify JSReceiver/JSObject::DeleteProperty method.

src/objects.h

 // 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 1645 matching lines @@
   MUST_USE_RESULT MaybeObject* SetProperty(
       LookupResult* result,
       Name* key,
       Object* value,
       PropertyAttributes attributes,
       StrictModeFlag strict_mode,
       StoreFromKeyed store_from_keyed = MAY_BE_STORE_FROM_KEYED);
   MUST_USE_RESULT MaybeObject* SetPropertyWithDefinedSetter(JSReceiver* setter,
                                                             Object* value);
 
-  MUST_USE_RESULT MaybeObject* DeleteProperty(Name* name, DeleteMode mode);
-  MUST_USE_RESULT MaybeObject* DeleteElement(uint32_t index, DeleteMode mode);
+  static Handle<Object> DeleteProperty(Handle<JSReceiver> object,
+                                       Handle<Name> name,
+                                       DeleteMode mode = NORMAL_DELETION);
+  static Handle<Object> DeleteElement(Handle<JSReceiver> object,
+                                      uint32_t index,
+                                      DeleteMode mode);
 
   // Set the index'th array element.
   // Can cause GC, or return failure if GC is required.
   MUST_USE_RESULT MaybeObject* SetElement(uint32_t index,
                                           Object* value,
                                           PropertyAttributes attributes,
                                           StrictModeFlag strict_mode,
                                           bool check_prototype);
 
   // Tests for the fast common case for property enumeration.
@@ skipping 216 matching lines @@
   // Handles the special representation of JS global objects.
   static Handle<Object> SetNormalizedProperty(Handle<JSObject> object,
                                               Handle<Name> key,
                                               Handle<Object> value,
                                               PropertyDetails details);
 
   MUST_USE_RESULT MaybeObject* SetNormalizedProperty(Name* name,
                                                      Object* value,
                                                      PropertyDetails details);
 
-  // Deletes the named property in a normalized object.
-  MUST_USE_RESULT MaybeObject* DeleteNormalizedProperty(Name* name,
-                                                        DeleteMode mode);
-
   static void OptimizeAsPrototype(Handle<JSObject> object);
   MUST_USE_RESULT MaybeObject* OptimizeAsPrototype();
 
   // Retrieve interceptors.
   InterceptorInfo* GetNamedInterceptor();
   InterceptorInfo* GetIndexedInterceptor();
 
   // Used from JSReceiver.
   PropertyAttributes GetPropertyAttributePostInterceptor(JSObject* receiver,
                                                          Name* name,
@@ skipping 70 matching lines @@
   // Deletes a hidden property. Deleting a non-existing property is
   // considered successful.
   void DeleteHiddenProperty(Name* key);
   // Returns true if the object has a property with the hidden string as name.
   bool HasHiddenProperties();
 
   static int GetIdentityHash(Handle<JSObject> obj);
   MUST_USE_RESULT MaybeObject* GetIdentityHash(CreationFlag flag);
   MUST_USE_RESULT MaybeObject* SetIdentityHash(Smi* hash, CreationFlag flag);
 
-  static Handle<Object> DeleteProperty(Handle<JSObject> obj,
-                                       Handle<Name> name);
-  // Can cause GC.
-  MUST_USE_RESULT MaybeObject* DeleteProperty(Name* name, DeleteMode mode);
-
-  static Handle<Object> DeleteElement(Handle<JSObject> obj, uint32_t index);
+  static Handle<Object> DeleteElement(Handle<JSObject> obj,
+                                      uint32_t index,
+                                      DeleteMode mode = NORMAL_DELETION);
   MUST_USE_RESULT MaybeObject* DeleteElement(uint32_t index, DeleteMode mode);
 
   inline void ValidateElements();
 
   // Makes sure that this object can contain HeapObject as elements.
   MUST_USE_RESULT inline MaybeObject* EnsureCanContainHeapObjectElements();
 
   // Makes sure that this object can contain the specified elements.
   MUST_USE_RESULT inline MaybeObject* EnsureCanContainElements(
       Object** elements,
@@ skipping 409 matching lines @@
   static void EnqueueChangeRecord(Handle<JSObject> object,
                                   const char* type,
                                   Handle<Name> name,
                                   Handle<Object> old_value);
 
   // Deliver change records to observers. May cause GC.
   static void DeliverChangeRecords(Isolate* isolate);
 
  private:
   friend class DictionaryElementsAccessor;
+  friend class JSReceiver;
 
   MUST_USE_RESULT MaybeObject* GetElementWithCallback(Object* receiver,
                                                       Object* structure,
                                                       uint32_t index,
                                                       Object* holder);
   MUST_USE_RESULT PropertyAttributes GetElementAttributeWithInterceptor(
       JSReceiver* receiver,
       uint32_t index,
       bool continue_search);
   MUST_USE_RESULT PropertyAttributes GetElementAttributeWithoutInterceptor(
@@ skipping 25 matching lines @@
   // has a setter, invoke it and set '*done' to true. If it is found and is
   // read-only, reject and set '*done' to true. Otherwise, set '*done' to
   // false. Can cause GC and can return a failure result with '*done==true'.
   MUST_USE_RESULT MaybeObject* SetPropertyViaPrototypes(
       Name* name,
       Object* value,
       PropertyAttributes attributes,
       StrictModeFlag strict_mode,
       bool* done);
 
-  MUST_USE_RESULT MaybeObject* DeletePropertyPostInterceptor(Name* name,
-                                                             DeleteMode mode);
-  MUST_USE_RESULT MaybeObject* DeletePropertyWithInterceptor(Name* name);
+  static Handle<Object> DeleteProperty(Handle<JSObject> object,
+                                       Handle<Name> name,
+                                       DeleteMode mode);
+  static Handle<Object> DeletePropertyPostInterceptor(Handle<JSObject> object,
+                                                      Handle<Name> name,
+                                                      DeleteMode mode);
+  static Handle<Object> DeletePropertyWithInterceptor(Handle<JSObject> object,
+                                                      Handle<Name> name);
+
+  // Deletes the named property in a normalized object.
+  static Handle<Object> DeleteNormalizedProperty(Handle<JSObject> object,
+                                                 Handle<Name> name,
+                                                 DeleteMode mode);
 
   MUST_USE_RESULT MaybeObject* DeleteElementWithInterceptor(uint32_t index);
 
   MUST_USE_RESULT MaybeObject* DeleteFastElement(uint32_t index);
   MUST_USE_RESULT MaybeObject* DeleteDictionaryElement(uint32_t index,
                                                        DeleteMode mode);
 
   bool ReferencesObjectFromElements(FixedArray* elements,
                                     ElementsKind kind,
                                     Object* object);
@@ skipping 2953 matching lines @@
   inline bool is_deprecated();
   inline bool CanBeDeprecated();
   // Returns a non-deprecated version of the input. If the input was not
   // deprecated, it is directly returned. Otherwise, the non-deprecated version
   // is found by re-transitioning from the root of the transition tree using the
   // descriptor array of the map. Returns NULL if no updated map is found.
   Map* CurrentMapForDeprecated();
 
   MUST_USE_RESULT MaybeObject* RawCopy(int instance_size);
   MUST_USE_RESULT MaybeObject* CopyWithPreallocatedFieldDescriptors();
+  static Handle<Map> CopyDropDescriptors(Handle<Map> map);
   MUST_USE_RESULT MaybeObject* CopyDropDescriptors();
   MUST_USE_RESULT MaybeObject* CopyReplaceDescriptors(
       DescriptorArray* descriptors,
       TransitionFlag flag,
       Name* name = NULL,
       SimpleTransitionFlag simple_flag = FULL_TRANSITION);
   MUST_USE_RESULT MaybeObject* CopyInstallDescriptors(
       int new_descriptor,
       DescriptorArray* descriptors);
   MUST_USE_RESULT MaybeObject* ShareDescriptor(DescriptorArray* descriptors,
@@ skipping 3191 matching lines @@
   // that is read-only, throw. In all these cases set '*done' to true,
   // otherwise set it to false.
   MUST_USE_RESULT MaybeObject* SetPropertyViaPrototypesWithHandler(
       JSReceiver* receiver,
       Name* name,
       Object* value,
       PropertyAttributes attributes,
       StrictModeFlag strict_mode,
       bool* done);
 
-  MUST_USE_RESULT MaybeObject* DeletePropertyWithHandler(
-      Name* name,
-      DeleteMode mode);
-  MUST_USE_RESULT MaybeObject* DeleteElementWithHandler(
-      uint32_t index,
-      DeleteMode mode);
-
   MUST_USE_RESULT PropertyAttributes GetPropertyAttributeWithHandler(
       JSReceiver* receiver,
       Name* name);
   MUST_USE_RESULT PropertyAttributes GetElementAttributeWithHandler(
       JSReceiver* receiver,
       uint32_t index);
 
   MUST_USE_RESULT MaybeObject* GetIdentityHash(CreationFlag flag);
 
   // Turn this into an (empty) JSObject.
@@ skipping 23 matching lines @@
   static const int kHeaderSize = kPaddingOffset;
   static const int kPaddingSize = kSize - kPaddingOffset;
 
   STATIC_CHECK(kPaddingSize >= 0);
 
   typedef FixedBodyDescriptor<kHandlerOffset,
                               kPaddingOffset,
                               kSize> BodyDescriptor;
 
  private:
+  friend class JSReceiver;
+
+  static Handle<Object> DeletePropertyWithHandler(Handle<JSProxy> object,
+                                                  Handle<Name> name,
+                                                  DeleteMode mode);
+  static Handle<Object> DeleteElementWithHandler(Handle<JSProxy> object,
+                                                 uint32_t index,
+                                                 DeleteMode mode);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSProxy);
 };
 
 
 class JSFunctionProxy: public JSProxy {
  public:
   // [call_trap]: The call trap.
   DECL_ACCESSORS(call_trap, Object)
 
   // [construct_trap]: The construct trap.
@@ skipping 1018 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_