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  1. #include <functional>
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. template <typename Arg, typename Result>
  7. void ho_fun(Result(*argFun)(Arg)) {
  8. 	Arg arg = 13;
  9.  
  10. 	argFun(arg);
  11. }
  12.  
  13. template <typename Arg1, typename Arg2, typename Result>
  14. void ho_fun(Result (*argFun)(Arg1, Arg2)) {
  15. 	Arg1 arg1 = 13;
  16. 	Arg2 arg2 = 42;
  17.  
  18. 	argFun(arg1, arg2);
  19. }
  20.  
  21. template <typename T, typename Arg, typename Result>
  22. void ho_fun(Result(T::*argFun)(Arg)) {
  23. 	T myClass;
  24. 	Arg arg = 13;
  25.  
  26. 	(myClass.*argFun)(arg);
  27. }
  28.  
  29. template <typename T, typename Arg1, typename Arg2, typename Result>
  30. void ho_fun(Result(T::*argFun)(Arg1, Arg2)) {
  31. 	T myClass;
  32. 	Arg1 arg1 = 13;
  33. 	Arg2 arg2 = 42;
  34.  
  35. 	(myClass.*argFun)(arg1, arg2);
  36. }
  37.  
  38. template <typename T, typename Arg, typename Result>
  39. void ho_fun(Result(T::*argFun)(Arg) const) {
  40. 	T myClass;
  41. 	Arg arg = 13;
  42.  
  43. 	(myClass.*argFun)(arg);
  44. }
  45.  
  46. template <typename T, typename Arg1, typename Arg2, typename Result>
  47. void ho_fun(Result(T::*argFun)(Arg1, Arg2) const) {
  48. 	T myClass;
  49. 	Arg1 arg1 = 13;
  50. 	Arg2 arg2 = 42;
  51.  
  52. 	(myClass.*argFun)(arg1, arg2);
  53. }
  54.  
  55. template <class T>
  56. void ho_fun(T argFun) {
  57. 	ho_fun(&T::operator());
  58. }
  59.  
  60. int oneFun(int a) { return -a; }
  61. int twoFun(int a, int b) { return a + b; }
  62.  
  63. struct Foo {
  64. 	int oneFun(int a) { return -a; }
  65. 	int twoFun(int a, int b) { return a + b; }
  66. };
  67.  
  68. int main() {
  69. 	ho_fun(oneFun);
  70. 	ho_fun(twoFun);
  71. 	ho_fun(&Foo::oneFun);
  72. 	ho_fun(&Foo::twoFun);
  73. 	ho_fun(negate<int>());
  74. 	ho_fun(plus<int>());
  75. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/TDrkYQ
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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