fork download
copy 
  1. #include <iostream>
  2. #include <type_traits>
  3. using namespace std;
  4.  
  5. typedef unsigned long mySize;
  6.  
  7. //default
  8. template <class P, class dummy = void>
  9. class T{
  10. 	public:
  11.    static P f(){return 0;}
  12. };
  13.  
  14. //int
  15. template <>
  16. class T<int,void> {
  17. 	public:
  18.    static int f(){return 1;}
  19. };
  20.  
  21. //unsigned long
  22. template <>
  23. class T<unsigned long, void> {
  24. 	public:
  25.    static unsigned long f(){return 2;}
  26. };
  27.  
  28. template <class P>
  29. class T<P, typename enable_if<is_same<P, mySize>::value && !is_same<P, unsigned long>::value, void>::type> {
  30. 	public:
  31.    static P f(){return 3;}
  32. };
  33.  
  34. int main() {
  35. 	cout << T<int>::f() << endl;
  36. 	cout << T<unsigned long>::f() << endl;
  37. 	cout << T<mySize>::f() << endl;
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1
2
2
https://ideone.com/xt41rw
language:
C++14 (gcc 8.3)
created:
9 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!