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  1. // is_complete
  2.   template<typename T, typename... Args>
  3.   struct is_complete : integral_constant<bool, is_complete<T>() && is_complete<Args...>()> {};
  4.   template<typename T>
  5.   struct is_complete{
  6.       template<typename U>
  7.       static auto test(int) -> decltype(sizeof(U), true_type{});
  8.       template<typename>
  9.       static auto test(...) -> false_type;
  10.  
  11.       constexpr operator bool() { return decltype(test<T>(0))(); }
  12.   };
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https://ideone.com/TjkDID
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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