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  1. 	#include <iostream>
  2. 	#include <type_traits>
  3.  
  4. 	class A {
  5. 	public:
  6. 	   A() {}
  7. 	   A(const A&) {}
  8. 	   A(int) {}
  9. 	};
  10.  
  11. 	class B{};
  12.  
  13. 	template<typename T>
  14. 	typename std::enable_if
  15. 		< std::is_base_of<A, T>::value
  16. 		, A >::type
  17. 	operator+(T& lhs,int rhs){
  18. 		typename std::enable_if
  19. 		< std::is_base_of<A, T>::value
  20. 		, A >::type ret;
  21. 	    // stuff
  22. 	    return ret;
  23. 	}
  24.  
  25.     int main() {
  26. 	  A u;
  27. 	  A v = u+1;
  28. 	}
  29.  
Success #stdin #stdout 0s 3336KB
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https://ideone.com/rLEi6y
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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