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| author | Nikolas Klauser <nikolasklauser@berlin.de> | 2024-06-25 16:53:17 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-06-25 16:53:17 +0200 |
| commit | 2274c66e6faaaf29ad693b1ae3e5a7b0228a1950 (patch) | |
| tree | 67df0fbf7d8c85c0edf486be8e9c17dd4507b557 | |
| parent | ec9ce89a0823165e245be8fc095da8a88fb4cf79 (diff) | |
| download | llvm-2274c66e6faaaf29ad693b1ae3e5a7b0228a1950.zip llvm-2274c66e6faaaf29ad693b1ae3e5a7b0228a1950.tar.gz llvm-2274c66e6faaaf29ad693b1ae3e5a7b0228a1950.tar.bz2 | |
[libc++] Use _If for conditional_t (#96193)
This avoids different instantiations when the if and else types are
different, resulting in reduced memory use by the compiler.
| -rw-r--r-- | libcxx/include/__type_traits/conditional.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/libcxx/include/__type_traits/conditional.h b/libcxx/include/__type_traits/conditional.h index 5b5445a..7d5849e 100644 --- a/libcxx/include/__type_traits/conditional.h +++ b/libcxx/include/__type_traits/conditional.h @@ -44,15 +44,14 @@ struct _LIBCPP_TEMPLATE_VIS conditional<false, _If, _Then> { using type _LIBCPP_NODEBUG = _Then; }; +template <bool _Bp, class _IfRes, class _ElseRes> +using __conditional_t _LIBCPP_NODEBUG = _If<_Bp, _IfRes, _ElseRes>; + #if _LIBCPP_STD_VER >= 14 template <bool _Bp, class _IfRes, class _ElseRes> -using conditional_t _LIBCPP_NODEBUG = typename conditional<_Bp, _IfRes, _ElseRes>::type; +using conditional_t _LIBCPP_NODEBUG = __conditional_t<_Bp, _IfRes, _ElseRes>; #endif -// Helper so we can use "conditional_t" in all language versions. -template <bool _Bp, class _If, class _Then> -using __conditional_t _LIBCPP_NODEBUG = typename conditional<_Bp, _If, _Then>::type; - _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___TYPE_TRAITS_CONDITIONAL_H |