gistfile1.txt

[11:36:19]:heller@shoeshine:/home/heller/tmp:0:$ cat args.cpp

#include <tuple>

template <typename Sig>
struct args;

template <typename R, typename...Args>
struct args<R(*)(Args...)>
{
    typedef R result;
    typedef std::tuple<Args...> args_tuple;
};

template <typename R, typename C, typename...Args>
struct args<R(C::*)(Args...)>
{
    typedef R result;
    typedef std::tuple<Args...> args_tuple;
};

void e(int, float);
double f(int, float);

struct s
{
    void g(float);
};

#include <iostream>
#include <typeinfo>
int main()
{
    std::cout
        << typeid(args<decltype(&e)>::args_tuple).name() << "\n"
        << typeid(args<decltype(&f)>::args_tuple).name() << "\n"
        << typeid(args<decltype(&s::g)>::args_tuple).name() << "\n"
        ;
}
[11:36:24]:heller@shoeshine:/home/heller/tmp:0:$ g++ -std=c++11 args.cpp && ./a.out | c++filt -t
std::tuple<int, float>
std::tuple<int, float>
std::tuple<float>