On Wed, 14 Feb 2024, Ken Matsui wrote:
> This patch optimizes the compilation performance of std::remove_extent
> by dispatching to the new __remove_extent built-in trait.
>
> libstdc++-v3/ChangeLog:
>
> * include/std/type_traits (remove_extent): Use __remove_extent
> built-in trait.
LGTM
>
> Signed-off-by: Ken Matsui <kmat...@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 3bde7cb8ba3..0fb1762186c 100644
> --- a/libstdc++-v3/include/std/type_traits
> +++ b/libstdc++-v3/include/std/type_traits
> @@ -2064,6 +2064,11 @@ _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; };
> @@ -2075,6 +2080,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
> template<typename _Tp>
> struct remove_extent<_Tp[]>
> { using type = _Tp; };
> +#endif
>
> /// remove_all_extents
> template<typename _Tp>
> --
> 2.43.0
>
>
