Message ID | 20240221093616.4001742-8-kmatsui@gcc.gnu.org |
---|---|
State | Superseded |
Headers |
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Series |
[v13,01/26] c++: Implement __is_const built-in trait
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Commit Message
Ken Matsui
Feb. 21, 2024, 9:35 a.m. UTC
This patch optimizes the compilation performance of
std::is_unbounded_array by dispatching to the new
__is_unbounded_array built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_unbounded_array_v): Use
__is_unbounded_array built-in trait.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 6407738a726..c4585a23df9 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3706,11 +3706,16 @@ template<typename _Ret, typename _Fn, typename... _Args> /// True for a type that is an array of unknown bound. /// @ingroup variable_templates /// @since C++20 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unbounded_array) + template<typename _Tp> + inline constexpr bool is_unbounded_array_v = __is_unbounded_array(_Tp); +# else template<typename _Tp> inline constexpr bool is_unbounded_array_v = false; template<typename _Tp> inline constexpr bool is_unbounded_array_v<_Tp[]> = true; +# endif /// True for a type that is an array of known bound. /// @since C++20