Static member existance check

gistfile1.cpp

template<typename T>
struct Has_My_Static {
    typedef char yes[1];
    typedef char no[2];
    template<void*> struct exist_check;
    template<typename U, U> struct type_check; // Use this for type checking.
#ifdef _MSC_VER
    template<typename C> static yes& chk(C*, exist_check<(void*)&C::MyStatic>*);
#else
    template<typename C> static yes& chk(C*, typeof(&C::MyStatic));
#endif
    static no& chk(...);
    static bool const value = sizeof(chk((T*)nullptr, nullptr)) == sizeof(yes);
};