How to write a variadic template recursive function?

Question

I\'m trying to write a variadic template constexpr function which calculates sum of the template parameters given. Here\'s my code:

template<         


        

Answer 1

Just sum it up the usual way.

template
constexpr int f() {
   int sum = 0;
   for(int i : { Args... }) sum += i;
   return sum;
}