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  1. #include <iostream>
  2.  
  3. void callback( int i )
  4. {
  5.    std::cout << __PRETTY_FUNCTION__ << " -> " << i << '\n';
  6. }
  7.  
  8. struct Callback
  9. {
  10.    void operator() (int i )
  11.    {
  12.       std::cout << __PRETTY_FUNCTION__ << " -> " << i << '\n';
  13.    }
  14. };
  15.  
  16. template< typename Func >
  17. void do_callback( Func f, int i)
  18. {
  19.    std::cout << __PRETTY_FUNCTION__ << " -> ";
  20.    f(i);
  21. }
  22.  
  23. int main()
  24. {
  25.    do_callback( callback, 1 );
  26.    do_callback( &callback, 2 );
  27.    do_callback( Callback(), 3 );
  28.    do_callback( []( int i ){ std::cout << __PRETTY_FUNCTION__ << " -> " << i << '\n'; }, 4 );
  29. }
Success #stdin #stdout 0s 2828KB
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stdin
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Standard input is empty
stdout
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void do_callback(Func, int) [with Func = void (*)(int)] -> void callback(int) -> 1
void do_callback(Func, int) [with Func = void (*)(int)] -> void callback(int) -> 2
void do_callback(Func, int) [with Func = Callback] -> void Callback::operator()(int) -> 3
void do_callback(Func, int) [with Func = main()::<lambda(int)>] -> main()::<lambda(int)> -> 4
https://ideone.com/u5pAH
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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