Overload resolve function pointer, C++ (vc++)

Overload resolve function pointer

//g++  4.9.3

#include <iostream>

#ifndef KS_CONSTEXPR
#    if defined(__GNUC__) || _MSC_VER >= 1900
#        define KS_CONSTEXPR_IMPLED
#        define KS_CONSTEXPR constexpr
#        define KS_CONST     constexpr
#    else
#        define KS_CONSTEXPR
#        define KS_CONST     const
#    endif
#endif

template <typename... Args>
struct SNonConstOverload
{
    template <typename R, typename T>
    KS_CONSTEXPR auto operator() (R(T::*ptr)(Args...)) const
    {
        return ptr;
    }
};

template <typename... Args>
struct SConstOverload
{
    template <typename R, typename T>
    KS_CONSTEXPR auto operator() (R(T::*ptr)(Args...) const) const
    {
        return ptr;
    }
};

template <typename... Args>
struct SOverload : SConstOverload<Args...>, SNonConstOverload < Args... >
{
    using SConstOverload<Args...>::operator();
    using SNonConstOverload<Args...>::operator();

template <typename R>
    KS_CONSTEXPR auto operator() (R(*ptr)(Args...)) const
    {
        return ptr;
    }
};

struct CS
{
double cos(double d){ return 0.0;}
double cos(int, int){return 0.0;}
};

int main()
{
    auto x = SOverload<double>{}(&CS::cos);
        auto y = SOverload<int, int>{}(&CS::cos);
    std::cout << "Hello, world!\n";
}


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