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#ifdef __cplusplus
    struct void_cast {
        inline void_cast( void* x_ ) : x( x_ ) { }
        inline void_cast( void const* x_ ) : x( (void*) x_ ) { }
        template< typename T > inline operator T() { return (T)x; } // cast to whatever requested
        void* x;
    };
    #define VOID_CAST( x ) void_cast( x )
#else
    #define VOID_CAST( x ) x

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