libstdc++-v3/testsuite/21_strings/char_traits/requirements/version.cc

   1 // { dg-do compile { target c++17 } }
   2 // { dg-require-effective-target hosted }
   3
   4 #include <version>
   5
   6 #ifndef __cpp_lib_constexpr_string
   7 # error Feature-test macro for constexpr char_traits is missing in <version>
   8 #elif __cpp_lib_constexpr_string < (__cplusplus == 201703 ? 201611 : 201811)
   9 # error Feature-test macro for constexpr char_traits has the wrong value in <version>
  10 #endif
  11
  12 // We also provide this non-standard macro for P0426R1 and P1032R1.
  13 #ifndef __cpp_lib_constexpr_char_traits
  14 # error Feature-test macro for constexpr char_traits is missing in <version>
  15 #elif __cpp_lib_constexpr_char_traits != (__cplusplus == 201703 ? 201611 : 201811)
  16 # error Feature-test macro for constexpr char_traits has the wrong value in <version>
  17 #endif