diff options
| -rw-r--r-- | libstdc++-v3/include/std/utility | 4 | ||||
| -rw-r--r-- | libstdc++-v3/testsuite/20_util/exchange/constexpr.cc | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/utility b/libstdc++-v3/include/std/utility index fb61835..acc47d6 100644 --- a/libstdc++-v3/include/std/utility +++ b/libstdc++-v3/include/std/utility @@ -86,6 +86,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #if __cplusplus >= 201402L #define __cpp_lib_exchange_function 201304L +#if __cplusplus > 201703L +# define __cpp_lib_constexpr_algorithms 201806L +#endif + /// Assign @p __new_val to @p __obj and return its previous value. template <typename _Tp, typename _Up = _Tp> _GLIBCXX20_CONSTEXPR diff --git a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc index 7a7ecd3..e7dc31e 100644 --- a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc +++ b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc @@ -20,6 +20,12 @@ #include <utility> +#ifndef __cpp_lib_constexpr_algorithms +# error "Feature test macro for constexpr std::exchange is missing in <utility>" +#elif __cpp_lib_constexpr_algorithms < 201806L +# error "Feature test macro for constexpr std::exchange has wrong value in <utility>" +#endif + constexpr bool test() { |