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| author | Jonathan Wakely <jwakely@redhat.com> | 2023-03-22 12:55:29 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2023-03-22 17:48:20 +0000 |
| commit | 924d990425d29ef39f3faac49d4a3772e4302c96 (patch) | |
| tree | 02443b3873b69a736a58e27ccc8143d610266dd9 /libstdc++-v3 | |
| parent | 02e86035d30e9f7b8645ebb64f4028900fc37126 (diff) | |
| download | gcc-924d990425d29ef39f3faac49d4a3772e4302c96.tar.gz | |
libstdc++: Define __cpp_lib_constexpr_algorithms in <utility> (LWG 3792)
We actually defined this macro in <utility> at one point, but I removed
it in r10-7901-g2025db692e9ed1.
libstdc++-v3/ChangeLog:
* include/std/utility (__cpp_lib_constexpr_algorithms): Define,
as per LWG 3792.
* testsuite/20_util/exchange/constexpr.cc: Check for it.
Diffstat (limited to 'libstdc++-v3')
| -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 43d8765228c..006b19c00fc 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 6c130f772f8..2ec13044681 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() { |