public inbox for libstdc++-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc(refs/users/kmatsui/heads/is_signed)] libstdc++: use new built-in trait __is_signed
@ 2023-07-09 8:50 Ken Matsui
0 siblings, 0 replies; only message in thread
From: Ken Matsui @ 2023-07-09 8:50 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:8e56cfff36415b33a5a580f65518865e70e49688
commit 8e56cfff36415b33a5a580f65518865e70e49688
Author: Ken Matsui <kmatsui@gcc.gnu.org>
Date: Tue Mar 21 08:44:32 2023 -0700
libstdc++: use new built-in trait __is_signed
This patch lets libstdc++ use new built-in trait __is_signed.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_signed): Use __is_signed built-in trait.
(is_signed_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Diff:
---
libstdc++-v3/include/std/type_traits | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 0e7a9c9c7f3..23ab5a4b1e5 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -865,6 +865,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: public __bool_constant<__is_abstract(_Tp)>
{ };
+ /// is_signed
+#if __has_builtin(__is_signed)
+ template<typename _Tp>
+ struct is_signed
+ : public __bool_constant<__is_signed(_Tp)>
+ { };
+#else
/// @cond undocumented
template<typename _Tp,
bool = is_arithmetic<_Tp>::value>
@@ -877,11 +884,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ };
/// @endcond
- /// is_signed
template<typename _Tp>
struct is_signed
: public __is_signed_helper<_Tp>::type
{ };
+#endif
/// is_unsigned
template<typename _Tp>
@@ -3240,8 +3247,14 @@ template <typename _Tp>
template <typename _Tp>
inline constexpr bool is_final_v = __is_final(_Tp);
+#if __has_builtin(__is_signed)
+template <typename _Tp>
+ inline constexpr bool is_signed_v = __is_signed(_Tp);
+#else
template <typename _Tp>
inline constexpr bool is_signed_v = is_signed<_Tp>::value;
+#endif
+
template <typename _Tp>
inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2023-07-09 8:50 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-07-09 8:50 [gcc(refs/users/kmatsui/heads/is_signed)] libstdc++: use new built-in trait __is_signed Ken Matsui
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).