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| author | Jonathan Wakely <jwakely@redhat.com> | 2025-07-12 13:12:09 +0100 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2025-07-16 13:10:30 +0100 |
| commit | 7c3081960922d9bd3ea81a9f8ca6e00c23170a2b (patch) | |
| tree | b35a327b7a99a9a69d0ff480bc94c057db78fa39 | |
| parent | 4a0967f7509b5fad1c9bda432f71deb0d342a879 (diff) | |
| download | gcc-7c3081960922d9bd3ea81a9f8ca6e00c23170a2b.zip gcc-7c3081960922d9bd3ea81a9f8ca6e00c23170a2b.tar.gz gcc-7c3081960922d9bd3ea81a9f8ca6e00c23170a2b.tar.bz2 | |
libstdc++: Use basic_string_view for std::bitset deduced types
This change was part of by P2697R1 (Interfacing bitset with string_view)
and should be slightly cheaper to instantiate.
We should consider using basic_string_view for C++17, C++20, and C++23
as well. This patch just conservatively changes it for C++26 to match
the working draft. It's conceivable that a program-defined
specialization of basic_string<_CharT> or basic_string_view<_CharT> will
observe a difference and be affected by this change.
libstdc++-v3/ChangeLog:
* include/std/bitset (__bitset::__string) [__cpp_lib_bitset]:
Change alias to refer to basic_string_view instead.
Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
| -rw-r--r-- | libstdc++-v3/include/std/bitset | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libstdc++-v3/include/std/bitset b/libstdc++-v3/include/std/bitset index 1c1e167..93a03f6 100644 --- a/libstdc++-v3/include/std/bitset +++ b/libstdc++-v3/include/std/bitset @@ -720,7 +720,10 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER namespace __bitset { -#if _GLIBCXX_HOSTED +#ifdef __cpp_lib_bitset // ...construct from string_view + template<typename _CharT> + using __string = std::basic_string_view<_CharT>; +#elif _GLIBCXX_HOSTED template<typename _CharT> using __string = std::basic_string<_CharT>; #else |