fork download 
  1. #include <functional>
  2. #include <iostream>
  3.  
  4. struct foo
  5. {
  6.     int _a;
  7.     foo(int a) : _a(a) {}
  8.     int operator()(int b) { return _a+b; }
  9. };
  10.  
  11.  
  12. class bar
  13. {        
  14. public:
  15.     std::function<int (int)> _ftor;
  16.  
  17.     bar(std::function<int (int)> my_ftor) : _ftor(my_ftor) {}
  18.     ~bar() {}
  19. };
  20.  
  21. void AnyFunction(bar& RefToBar)
  22. {
  23.     int y = RefToBar._ftor(25);
  24.     std::cout << "Y: " << y << std::endl;
  25. }
  26.  
  27. int AnotherFunction(int b)
  28. {
  29. 	return b + 11;
  30. }
  31.  
  32. int main(int argc, char const *argv[])
  33. {
  34. 	foo MyFoo(20);
  35. 	bar MyBar(MyFoo);
  36. 	bar MyBar_2(AnotherFunction);
  37. 	bar MyBar_3([](int b) { return b + 56; });
  38.  
  39.  
  40. 	AnyFunction(MyBar);
  41. 	AnyFunction(MyBar_2);
  42. 	AnyFunction(MyBar_3);
  43. 	return 0;
  44. }
  45.  
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
Y: 45
Y: 36
Y: 81
https://ideone.com/K3QRRV
language:
C++14 (gcc 8.3)
created:
12 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!