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/*
* 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 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
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSNotAnObject_h
#define JSNotAnObject_h
#include "JSObject.h"
namespace JSC {
// 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 JSNonFinalObject {
private:
explicit JSNotAnObject(VM& vm)
: JSNonFinalObject(vm, vm.notAnObjectStructure.get())
{
}
public:
typedef JSNonFinalObject Base;
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:
static const unsigned StructureFlags = OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames | JSObject::StructureFlags;
// 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
#endif // JSNotAnObject_h
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