| // { dg-do compile { target c++17 } } |
| |
| #include <version> |
| |
| #ifndef __cpp_lib_constexpr_string |
| # error Feature-test macro for constexpr char_traits is missing in <version> |
| #elif __cpp_lib_constexpr_string < (__cplusplus == 201703 ? 201611 : 201811) |
| # error Feature-test macro for constexpr char_traits has the wrong value in <version> |
| #endif |
| |
| // We also provide this non-standard macro for P0426R1 and P1032R1. |
| #ifndef __cpp_lib_constexpr_char_traits |
| # error Feature-test macro for constexpr char_traits is missing in <version> |
| #elif __cpp_lib_constexpr_char_traits != (__cplusplus == 201703 ? 201611 : 201811) |
| # error Feature-test macro for constexpr char_traits has the wrong value in <version> |
| #endif |
