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  1. #include <array>
  2.  
  3. // to_array implementation taken from http://e...content-available-to-author-only...e.com/w/cpp/experimental/to_array
  4. namespace detail {
  5. template <class T, std::size_t N, std::size_t... I>
  6. constexpr std::array<std::remove_cv_t<T>, N>
  7.     to_array_impl(T (&a)[N], std::index_sequence<I...>)
  8. {
  9.     return { {a[I]...} };
  10. }
  11. }
  12.  
  13. template <class T, std::size_t N>
  14. constexpr std::array<std::remove_cv_t<T>, N> to_array(T (&a)[N])
  15. {
  16.     return detail::to_array_impl(a, std::make_index_sequence<N>{});
  17. }
  18. // End of to_array implementation
  19.  
  20. struct blah { };
  21.  
  22. template<std::size_t N>
  23. constexpr auto foo(const blah(&arr)[N])
  24. {
  25. 	return to_array(arr);
  26. }
  27.  
  28. int main()
  29. {
  30. 	auto res = foo({{}, {}});
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/slbKi3
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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