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  1. #include <iostream>
  2.  
  3. struct A {
  4.   int a; 
  5.   bool operator<(const int& inty) { return a < inty; }
  6.   bool operator>(const int& inty) { return a > inty; }
  7. }; 
  8.  
  9. template <class A, class B> 
  10. auto operator<(const A& a, const B& b)
  11.     -> decltype(a > b)
  12. { std::cout << "derp!\n"; return a < b; } 
  13.  
  14. int main(void) { 
  15.   A a;
  16.   a.a = 1;
  17.   int b = 2;
  18.   if (a < b)
  19.     return 4;
  20.   return 0;
  21. }
Runtime error #stdin #stdout 0s 2824KB
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Standard input is empty
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Standard output is empty
https://ideone.com/0XBMw
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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