diff options
| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-09-11 13:58:35 -0700 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-06-13 05:55:57 -0700 |
| commit | b38aefbbc90a3334c6c5ba6569816d348a1a0c91 (patch) | |
| tree | c7cc39c88787b831933e6d48b5a8fee830570864 | |
| parent | bb99672e0c49d8b8822664eaabc10cd51a42aab4 (diff) | |
| download | gcc-b38aefbbc90a3334c6c5ba6569816d348a1a0c91.zip gcc-b38aefbbc90a3334c6c5ba6569816d348a1a0c91.tar.gz gcc-b38aefbbc90a3334c6c5ba6569816d348a1a0c91.tar.bz2 | |
libstdc++: Optimize std::is_unbounded_array compilation performance
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>
Reviewed-by: Patrick Palka <ppalka@redhat.com>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
| -rw-r--r-- | libstdc++-v3/include/std/type_traits | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 748fa18..efbe273d 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3682,11 +3682,16 @@ 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 |