[PATCH v26 06/13] libstdc++: Optimize std::remove_extent compilation performance

[Jonathan Wakely]

On 11/05/24 02:01 -0700, Ken Matsui wrote:
>This patch optimizes the compilation performance of std::remove_extent
>by dispatching to the new __remove_extent built-in trait.

OK, thanks.

>libstdc++-v3/ChangeLog:
>
>	* include/std/type_traits (remove_extent): Use __remove_extent
>	built-in trait.
>
>Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
>---
> libstdc++-v3/include/std/type_traits | 6 ++++++
> 1 file changed, 6 insertions(+)
>
>diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
>index 6313fde94c2..58281c2e38c 100644
>--- a/libstdc++-v3/include/std/type_traits
>+++ b/libstdc++-v3/include/std/type_traits
>@@ -2092,6 +2092,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
>   // Array modifications.
>
>   /// remove_extent
>+#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_extent)
>+  template<typename _Tp>
>+    struct remove_extent
>+    { using type = __remove_extent(_Tp); };
>+#else
>   template<typename _Tp>
>     struct remove_extent
>     { using type = _Tp; };
>@@ -2103,6 +2108,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
>   template<typename _Tp>
>     struct remove_extent<_Tp[]>
>     { using type = _Tp; };
>+#endif
>
>   /// remove_all_extents
>   template<typename _Tp>
>-- 
>2.44.0
>