JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / runtime / JSNotAnObject.h

diff --git a/runtime/JSNotAnObject.h b/runtime/JSNotAnObject.h
index 339d41f5a2294413c140ae9fdff58347f30fa6fb..0c26ec98b6fb17a81cec959f71d5acc448a457e2 100644 (file)
--- a/runtime/JSNotAnObject.h
+++ b/runtime/JSNotAnObject.h
@@ -10,7 +10,7 @@
  * 2.  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 with the distribution.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -33,68 +33,50 @@
 
 namespace JSC {
 
-    class JSNotAnObjectErrorStub : public JSObject {
-    public:
-        JSNotAnObjectErrorStub(ExecState* exec, bool isNull)
-            : JSObject(exec->globalData().notAnObjectErrorStubStructure)
-            , m_isNull(isNull)
-        {
-        }
-
-        bool isNull() const { return m_isNull; }
-
-    private:
-        virtual bool isNotAnObjectErrorStub() const { return true; }
-
-        bool m_isNull;
-    };
-    
-    // This unholy class is used to allow us to avoid multiple exception checks
-    // in certain SquirrelFish bytecodes -- effectively it just silently consumes
-    // any operations performed on the result of a failed toObject call.
-    class JSNotAnObject : public JSObject {
-    public:
-        JSNotAnObject(ExecState* exec, JSNotAnObjectErrorStub* exception)
-            : JSObject(exec->globalData().notAnObjectStructure)
-            , m_exception(exception)
-        {
-        }
-
-        static PassRefPtr<Structure> createStructure(JSValue prototype)
-        {
-            return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount);
-        }
-
-     private:
-        
-        static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
-
-        // JSValue methods
-        virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
-        virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue&);
-        virtual bool toBoolean(ExecState*) const;
-        virtual double toNumber(ExecState*) const;
-        virtual UString toString(ExecState*) const;
-        virtual JSObject* toObject(ExecState*) const;
-
-        // Marking
-        virtual void markChildren(MarkStack&);
-
-        // JSObject methods
-        virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
-        virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
-        virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
-
-        virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
-        virtual void put(ExecState*, unsigned propertyName, JSValue);
-
-        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
-        virtual bool deleteProperty(ExecState*, unsigned propertyName);
-
-        virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);
-
-        JSNotAnObjectErrorStub* m_exception;
-    };
+// This unholy class is used to allow us to avoid multiple exception checks
+// in certain SquirrelFish bytecodes -- effectively it just silently consumes
+// any operations performed on the result of a failed toObject call.
+class JSNotAnObject final : public JSNonFinalObject {
+private:
+    explicit JSNotAnObject(VM& vm)
+        : JSNonFinalObject(vm, vm.notAnObjectStructure.get())
+    {
+    }
+
+public:
+    typedef JSNonFinalObject Base;
+    static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames;
+
+    static JSNotAnObject* create(VM& vm)
+    {
+        JSNotAnObject* object = new (NotNull, allocateCell<JSNotAnObject>(vm.heap)) JSNotAnObject(vm);
+        object->finishCreation(vm);
+        return object;
+    }
+
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+    {
+        return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+    }
+
+    DECLARE_INFO;
+
+private:
+    // JSValue methods
+    static JSValue defaultValue(const JSObject*, ExecState*, PreferredPrimitiveType);
+
+    // JSObject methods
+    static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
+    static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned propertyName, PropertySlot&);
+
+    static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
+    static void putByIndex(JSCell*, ExecState*, unsigned propertyName, JSValue, bool shouldThrow);
+
+    static bool deleteProperty(JSCell*, ExecState*, PropertyName);
+    static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned propertyName);
+
+    static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
+};
 
 } // namespace JSC