Source/JavaScriptCore/runtime/NullGetterFunction.h

/*
 * Copyright (C) 2014-2021 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

#pragma once

#include "InternalFunction.h"

namespace JSC {

class NullGetterFunction final : public InternalFunction {
public:
    typedef InternalFunction Base;

    static NullGetterFunction* create(VM& vm, Structure* structure)
    {
        // Since NullGetterFunction is per JSGlobalObject, we use put-without-transition in InternalFunction::finishCreation.
        NullGetterFunction* function = new (NotNull, allocateCell< NullGetterFunction>(vm))  NullGetterFunction(vm, structure);
        function->finishCreation(vm, 0, String(), PropertyAdditionMode::WithoutStructureTransition);
        return function;
    }

    DECLARE_EXPORT_INFO;

    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
    {
        return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info());
    }

private:
    NullGetterFunction(VM&, Structure*);
};
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(NullGetterFunction, InternalFunction);

} // namespace JSC