fork(1) download
copy 
  1. #include <iostream>
  2. #include <type_traits>
  3. #include <utility>
  4.  
  5. template<typename T>
  6. struct f_caller
  7. {
  8.     void operator () (T&& ) { std::cout << "T&&" << std::endl; }
  9.     void operator () (T const& ) { std::cout << "const T&" << std::endl; }
  10. };
  11.  
  12.  
  13. template <typename T>
  14. void f(T&& t)
  15. {
  16.     f_caller<typename std::decay<T>::type>()(std::forward<T>(t));
  17. }
  18.  
  19. int main()
  20. {
  21.     int i;
  22.     f(42);
  23.     f(i);
  24. }
  25.  
Success #stdin #stdout 0s 3296KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
T&&
const T&
https://ideone.com/jQM0vr
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!