#include <type_traits>

int& get_i(){ static int i = 5; return i; }

int main(){
  auto i1 = get_i(); // copy
  decltype(get_i()) i2 = get_i(); // reference
  static_assert(std::is_same<decltype(i1), int>::value, "wut");
  static_assert(std::is_same<decltype(i2), int&>::value, "huh");
}