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| author | Jonathan Wakely <jwakely@redhat.com> | 2024-05-22 16:49:31 +0100 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2024-08-23 13:39:36 +0100 |
| commit | 952e67c0d131300f263d729a0fe07bc3655dad27 (patch) | |
| tree | 459afe0f1f3a97870232c73622b26e70035f1e5f | |
| parent | 8cf51d7516b92b352c358c14ab4e456ae53c3371 (diff) | |
| download | gcc-952e67c0d131300f263d729a0fe07bc3655dad27.zip gcc-952e67c0d131300f263d729a0fe07bc3655dad27.tar.gz gcc-952e67c0d131300f263d729a0fe07bc3655dad27.tar.bz2 | |
libstdc++: Optimize __try_use_facet for const types
LWG 436 confirmed that const-qualified types are valid arguments for
Facet template parameters (but volatile-qualified types are not). Use the
fast path in std::use_facet and std::has_facet for const T as well as T.
libstdc++-v3/ChangeLog:
* include/bits/locale_classes.tcc (__try_use_facet): Also avoid
dynamic_cast for const-qualified facet types.
| -rw-r--r-- | libstdc++-v3/include/bits/locale_classes.tcc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libstdc++-v3/include/bits/locale_classes.tcc b/libstdc++-v3/include/bits/locale_classes.tcc index c79574e..d5ef191 100644 --- a/libstdc++-v3/include/bits/locale_classes.tcc +++ b/libstdc++-v3/include/bits/locale_classes.tcc @@ -110,7 +110,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // We know these standard facets are always installed in every locale // so dynamic_cast always succeeds, just use static_cast instead. #define _GLIBCXX_STD_FACET(...) \ - if _GLIBCXX_CONSTEXPR (__is_same(_Facet, __VA_ARGS__)) \ + if _GLIBCXX_CONSTEXPR (__is_same(const _Facet, const __VA_ARGS__)) \ return static_cast<const _Facet*>(__facets[__i]) _GLIBCXX_STD_FACET(ctype<char>); |