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type_traits (__cpp_lib_is_constant_evaluated): Define. 

* include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
	* include/std/version (__cpp_lib_is_constant_evaluated): Define.

From-SVN: r267847
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Jakub Jelinek 2019-01-11 17:01:23 +01:00 committed by Jakub Jelinek
parent b3650d40fa
commit 134a6f7b10
3 changed files with 11 additions and 0 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2019-01-11 Jakub Jelinek <jakub@redhat.com>
* include/std/type_traits (__cpp_lib_is_constant_evaluated): Define.
* include/std/version (__cpp_lib_is_constant_evaluated): Define.
2019-01-11 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/88802

3
libstdc++-v3/include/std/type_traits
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@ -3030,6 +3030,9 @@ template <typename _From, typename _To>
using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type;
#ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
#define __cpp_lib_is_constant_evaluated 201811L
constexpr inline bool
is_constant_evaluated() noexcept
{ return __builtin_is_constant_evaluated(); }

3
libstdc++-v3/include/std/version
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@ -142,6 +142,9 @@
#if __cplusplus > 201703L
// c++2a
#ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
# define __cpp_lib_is_constant_evaluated 201811L
#endif
#define __cpp_lib_list_remove_return_type 201806L
#endif // C++2a
#endif // C++17