fork(2) download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template <typename Derived>
  5. struct Comparisons
  6. {
  7. };
  8.  
  9.  
  10. template <typename Derived>
  11. bool operator!=(const Comparisons<Derived>& lhs, const Comparisons<Derived>& rhs)
  12. {
  13.     const Derived& d1 = static_cast<const Derived&>(lhs);
  14.     const Derived& d2 = static_cast<const Derived&>(rhs);
  15.  
  16.     return !(d1 == d2);
  17. }
  18.  
  19. struct Test : Comparisons<Test>
  20. {
  21.     friend bool operator==(const Test& t1, const Test& t2)
  22.     {
  23.         return true;
  24.     }
  25. };
  26.  
  27. int main()
  28. {
  29.     Test t1, t2;
  30.  
  31.     bool b = t1 != t2;
  32.  
  33.     return 0;
  34. }
Success #stdin #stdout 0s 4300KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/W1DRnn
language:
C++14 (gcc 8.3)
created:
5 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!