From: Ken Matsui <kmatsui@gcc.gnu.org>
To: gcc-patches@gcc.gnu.org
Cc: libstdc++@gcc.gnu.org, Ken Matsui <kmatsui@gcc.gnu.org>
Subject: [PATCH v4 2/2] libstdc++: use new built-in trait __is_unsigned
Date: Sat, 8 Jul 2023 04:13:08 -0700 [thread overview]
Message-ID: <20230708111308.92402-2-kmatsui@gcc.gnu.org> (raw)
In-Reply-To: <20230708111308.92402-1-kmatsui@gcc.gnu.org>
This patch lets libstdc++ use new built-in trait __is_unsigned.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_unsigned): Use __is_unsigned built-in
trait.
(is_unsigned_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 0e7a9c9c7f3..7eeb0da7a27 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -884,10 +884,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ };
/// is_unsigned
+#if __has_builtin(__is_unsigned)
+ template<typename _Tp>
+ struct is_unsigned
+ : public __bool_constant<__is_unsigned(_Tp)>
+ { };
+#else
template<typename _Tp>
struct is_unsigned
: public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type
{ };
+#endif
/// @cond undocumented
template<typename _Tp, typename _Up = _Tp&&>
@@ -3242,8 +3249,14 @@ template <typename _Tp>
template <typename _Tp>
inline constexpr bool is_signed_v = is_signed<_Tp>::value;
+
+#if __has_builtin(__is_unsigned)
+template <typename _Tp>
+ inline constexpr bool is_unsigned_v = __is_unsigned(_Tp);
+#else
template <typename _Tp>
inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
+#endif
template <typename _Tp, typename... _Args>
inline constexpr bool is_constructible_v = __is_constructible(_Tp, _Args...);
--
2.41.0
next prev parent reply other threads:[~2023-07-08 11:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 16:39 [PATCH 1/2] c++: implement __is_unsigned built-in trait Ken Matsui
2023-03-21 16:39 ` [PATCH 2/2] libstdc++: use new built-in trait __is_unsigned Ken Matsui
2023-03-21 16:44 ` Jonathan Wakely
2023-03-21 17:02 ` Ken Matsui
2023-03-23 0:42 ` [PATCH v2 " Ken Matsui
2023-03-21 17:08 ` Ken Matsui
2023-03-21 16:42 ` [PATCH 1/2] c++: implement __is_unsigned built-in trait Jonathan Wakely
2023-03-23 0:41 ` [PATCH v2 " Ken Matsui
2023-07-08 5:54 ` [PATCH v3 " Ken Matsui
2023-07-08 11:13 ` [PATCH v4 " Ken Matsui
2023-07-08 11:13 ` Ken Matsui [this message]
2023-07-12 10:04 ` [PATCH v4 2/2] libstdc++: use new built-in trait __is_unsigned Jonathan Wakely
2023-07-08 11:25 ` [PATCH v4 1/2] c++: implement __is_unsigned built-in trait Ken Matsui
2023-09-04 15:00 ` [PING][PATCH " Ken Matsui
2023-03-21 17:06 ` [PATCH v2 " Ken Matsui
2023-03-22 21:23 ` Ken Matsui
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