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  1. #include <cstdint>
  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<std::size_t I>
  15. struct placeholder : public chameleon
  16. {
  17.     using chameleon::chameleon;
  18. };
  19.  
  20. int main()
  21. {
  22.     constexpr const placeholder<0> _1;
  23.  
  24.     return 0;
  25. }
  26.  
Success #stdin #stdout 0s 3336KB
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https://ideone.com/wKeJM8
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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