From: Ken Matsui <kmatsui@cs.washington.edu>
To: gcc-patches@gcc.gnu.org
Cc: libstdc++@gcc.gnu.org, ppalka@redhat.com,
Ken Matsui <kmatsui@cs.washington.edu>
Subject: [PATCH 2/2] libstdc++: use new built-in trait __add_const
Date: Tue, 21 Mar 2023 04:10:56 -0700 [thread overview]
Message-ID: <20230321111056.78121-2-kmatsui@cs.washington.edu> (raw)
In-Reply-To: <20230321111056.78121-1-kmatsui@cs.washington.edu>
This patch lets libstdc++ use new built-in trait __add_const.
libstdc++-v3/ChangeLog:
* include/std/type_traits (add_const): Use __add_const built-in trait.
---
libstdc++-v3/include/std/type_traits | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 2bd607a8b8f..1ac75a928c3 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -1560,9 +1560,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
/// add_const
+#if __has_builtin(__add_const)
+ template<typename _Tp>
+ struct add_const
+ { using type = __add_const(_Tp); };
+#else
template<typename _Tp>
struct add_const
{ using type = _Tp const; };
+#endif
/// add_volatile
template<typename _Tp>
--
2.40.0
next prev parent reply other threads:[~2023-03-21 11:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 11:10 [PATCH 1/2] c++: implement __add_const built-in trait Ken Matsui
2023-03-21 11:10 ` Ken Matsui [this message]
2023-03-21 11:20 ` [PATCH 2/2] libstdc++: use new built-in trait __add_const Marc Glisse
2023-03-21 11:24 ` Jonathan Wakely
2023-03-21 11:37 ` Ken Matsui
2023-03-21 11:26 ` [PATCH 1/2] c++: implement __add_const built-in trait Jonathan Wakely
2023-03-21 11:29 ` Jonathan Wakely
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