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  1. #include <type_traits>
  2.  
  3. struct chameleon
  4.     {
  5.         template<typename T>
  6.         constexpr operator T() const
  7.         {
  8.             return T{};
  9.         }
  10.  
  11.         constexpr chameleon() = default;
  12.     };
  13.  
  14. template<int foo>
  15. struct bar
  16. {
  17.  
  18. };
  19.  
  20. using mytype = std::integral_constant<int,chameleon{}>;
  21.  
  22. static_assert( mytype::value == 0 , "Mmmmm...." );
  23.  
  24. int main()
  25. {
  26.     mytype f;
  27. }
Success #stdin #stdout 0s 3336KB
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https://ideone.com/KhAN6R
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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