C에서 'void*'와 멤버 함수에 대한 포인터 사이를 안전하게 캐스팅하는 방법은 무엇입니까?

<code class="cpp">template <class T>
int call_int_function(lua_State *L) 
{
    void (T::*method)(int, int) = reinterpret_cast<void (T::*)(int, int)>(lua_touserdata(L, lua_upvalueindex(1))); // <-- problematic line
    T *obj = reinterpret_cast<T *>(lua_touserdata(L, 1));

    (obj->*method)(lua_tointeger(L, 2), lua_tointeger(L, 3));
    return 0;
}</code>

<code class="cpp">template <class T>
int call_int_function(lua_State *L) 
{
    void (*method)(T*, int, int) = reinterpret_cast<void (*)(T*, int, int)>(lua_touserdata(L, lua_upvalueindex(1)));
    T *obj = reinterpret_cast<T *>(lua_touserdata(L, 1));

    method(obj, lua_tointeger(L, 2), lua_tointeger(L, 3));
    return 0;
}</code>