Implementation of strict mode in SetElement.

src/objects.h

 // Copyright 2010 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 1522 matching lines @@
     DICTIONARY_ELEMENT
   };
 
   LocalElementType HasLocalElement(uint32_t index);
 
   bool HasElementWithInterceptor(JSObject* receiver, uint32_t index);
   bool HasElementPostInterceptor(JSObject* receiver, uint32_t index);
 
   MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index,
                                               Object* value,
+                                              StrictModeFlag strict_mode,
                                               bool check_prototype = true);
 
   // Set the index'th array element.
   // A Failure object is returned if GC is needed.
   MUST_USE_RESULT MaybeObject* SetElement(uint32_t index,
                                           Object* value,
+                                          StrictModeFlag strict_mode,
                                           bool check_prototype = true);
 
   // Returns the index'th element.
   // The undefined object if index is out of bounds.
   MaybeObject* GetElementWithReceiver(Object* receiver, uint32_t index);
   MaybeObject* GetElementWithInterceptor(Object* receiver, uint32_t index);
 
   // Get external element value at index if there is one and undefined
   // otherwise. Can return a failure if allocation of a heap number
   // failed.
@@ skipping 239 matching lines @@
 
  private:
   MUST_USE_RESULT MaybeObject* GetElementWithCallback(Object* receiver,
                                                       Object* structure,
                                                       uint32_t index,
                                                       Object* holder);
   MaybeObject* SetElementWithCallback(Object* structure,
                                       uint32_t index,
                                       Object* value,
                                       JSObject* holder);
-  MUST_USE_RESULT MaybeObject* SetElementWithInterceptor(uint32_t index,
-                                                         Object* value,
-                                                         bool check_prototype);
+  MUST_USE_RESULT MaybeObject* SetElementWithInterceptor(
+      uint32_t index,
+      Object* value,
+      StrictModeFlag strict_mode,
+      bool check_prototype);
   MUST_USE_RESULT MaybeObject* SetElementWithoutInterceptor(
       uint32_t index,
       Object* value,
+      StrictModeFlag strict_mode,
       bool check_prototype);
 
   MaybeObject* GetElementPostInterceptor(Object* receiver, uint32_t index);
 
   MUST_USE_RESULT MaybeObject* DeletePropertyPostInterceptor(String* name,
                                                              DeleteMode mode);
   MUST_USE_RESULT MaybeObject* DeletePropertyWithInterceptor(String* name);
 
   MUST_USE_RESULT MaybeObject* DeleteElementPostInterceptor(uint32_t index,
                                                             DeleteMode mode);
@@ skipping 616 matching lines @@
   static inline Dictionary<Shape, Key>* cast(Object* obj) {
     return reinterpret_cast<Dictionary<Shape, Key>*>(obj);
   }
 
   // Returns the value at entry.
   Object* ValueAt(int entry) {
     return this->get(HashTable<Shape, Key>::EntryToIndex(entry)+1);
   }
 
   // Set the value for entry.
-  void ValueAtPut(int entry, Object* value) {
+  // Returns false if the put wasn't performed due to property being read only.
+  // Returns true on successful put.
+  bool ValueAtPut(int entry, Object* value) {
     // Check that this value can actually be written.
     PropertyDetails details = DetailsAt(entry);
     // If a value has not been initilized we allow writing to it even if
     // it is read only (a declared const that has not been initialized).
-    if (details.IsReadOnly() && !ValueAt(entry)->IsTheHole()) return;
-    this->set(HashTable<Shape, Key>::EntryToIndex(entry)+1, value);
+    if (details.IsReadOnly() && !ValueAt(entry)->IsTheHole()) {
+      return false;
+    }
+    this->set(HashTable<Shape, Key>::EntryToIndex(entry) + 1, value);
+    return true;
   }
 
   // Returns the property details for the property at entry.
   PropertyDetails DetailsAt(int entry) {
     ASSERT(entry >= 0);  // Not found is -1, which is not caught by get().
     return PropertyDetails(
         Smi::cast(this->get(HashTable<Shape, Key>::EntryToIndex(entry) + 2)));
   }
 
   // Set the details for entry.
@@ skipping 4095 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_