/* | |
* Copyright (C) 2008, 2009 Apple Inc. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 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 | |
* its contributors may be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
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*/ | |
#ifndef JSNotAnObject_h | |
#define JSNotAnObject_h | |
#include "JSObject.h" | |
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; | |
}; | |
} // namespace JSC | |
#endif // JSNotAnObject_h |