Address of function example

addressoffn.cc

/*

Illustrate how the & operator can be omitted when getting a function pointer.

In reply to: https://www.youtube.com/watch?v=z-kUhwANrIw

2016, Georg Sauthoff

 */


#include <iostream>
#include <functional>
#include <typeinfo>


int do_something(int i)
{ 
  return 5 + i;
}


int main()
{ 
  // std::cout << std::invoke(do_something, 5) << '\n';

  auto f1 = do_something;
  std::cout << typeid(f1).name() << '\n';
  auto f2 = &do_something;
  std::cout << typeid(f2).name() << '\n';
  return 0;
}

/*

output:

    $ ./a.out | c++filt -t
    int (*)(int)
    int (*)(int)


 */