Source/JavaScriptCore/API/JSCallbackFunction.h

/*
 * Copyright (C) 2006-2022 Apple Inc. All rights reserved.
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#ifndef JSCallbackFunction_h
#define JSCallbackFunction_h

#include "InternalFunction.h"
#include "JSObjectRef.h"

namespace JSC {

class JSCallbackFunction final : public InternalFunction {
    friend struct APICallbackFunction;
public:
    typedef InternalFunction Base;

    template<typename CellType, SubspaceAccess mode>
    static GCClient::IsoSubspace* subspaceFor(VM& vm)
    {
        return vm.callbackFunctionSpace<mode>();
    }

    static JSCallbackFunction* create(VM&, JSGlobalObject*, JSObjectCallAsFunctionCallback, const String& name);

    DECLARE_INFO;
    
    // InternalFunction mish-mashes constructor and function behavior -- we should 
    // refactor the code so this override isn't necessary
    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) 
    { 
        return Structure::create(vm, globalObject, proto, TypeInfo(InternalFunctionType, StructureFlags), info()); 
    }

private:
    JSCallbackFunction(VM&, Structure*, JSObjectCallAsFunctionCallback);
    void finishCreation(VM&, const String& name);

    JSObjectCallAsFunctionCallback functionCallback() { return m_callback; }

    JSObjectCallAsFunctionCallback m_callback { nullptr };
};

} // namespace JSC

#endif // JSCallbackFunction_h