From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7934) id 66D4B3857B93; Sat, 8 Jul 2023 05:26:15 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 66D4B3857B93 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1688793975; bh=bXEgQs0ZAxDBDuroqmb3+ed5HMywE41kHP5cIrLDOoI=; h=From:To:Subject:Date:From; b=r6g4nhRfSNCLDrBgFwDy+m9sQEJXBXLtTyvBEwuR6c4jmDQ//ijb/bOoeFvHZKcDY /twOSd8EWqxBAbV3+SrBJdp9kV2qjdOXHCFP1X/J96v9JUVLP1wDWUSc6lPTAGwKVH LqzcDJAMwZAKRfsCNBwLjLthlOnGH7YdM4V1RhYo= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Ken Matsui To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc(refs/users/kmatsui/heads/is_const)] libstdc++: use new built-in trait __is_const X-Act-Checkin: gcc X-Git-Author: Ken Matsui X-Git-Refname: refs/users/kmatsui/heads/is_const X-Git-Oldrev: 99a6292191da7f0b69c44e11ae302a61118ef10e X-Git-Newrev: 544f32e91cd20d8a66af8b71bba86e237269a6f4 Message-Id: <20230708052615.66D4B3857B93@sourceware.org> Date: Sat, 8 Jul 2023 05:26:15 +0000 (GMT) List-Id: https://gcc.gnu.org/g:544f32e91cd20d8a66af8b71bba86e237269a6f4 commit 544f32e91cd20d8a66af8b71bba86e237269a6f4 Author: Ken Matsui Date: Tue Mar 21 17:09:34 2023 -0700 libstdc++: use new built-in trait __is_const This patch lets libstdc++ use new built-in trait __is_const. libstdc++-v3/ChangeLog: * include/std/type_traits (is_const): Use __is_const built-in trait. (is_const_v): Likewise. Signed-off-by: Ken Matsui Diff: --- libstdc++-v3/include/std/type_traits | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 0e7a9c9c7f3..3a46eca5377 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -764,6 +764,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Type properties. /// is_const +#if __has_builtin(__is_const) + template + struct is_const + : public __bool_constant<__is_const(_Tp)> + { }; +#else template struct is_const : public false_type { }; @@ -771,6 +777,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_const<_Tp const> : public true_type { }; +#endif /// is_volatile template @@ -3210,10 +3217,17 @@ template inline constexpr bool is_compound_v = is_compound<_Tp>::value; template inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; + +#if __has_builtin(__is_const) +template + inline constexpr bool is_const_v = __is_const(_Tp); +#else template inline constexpr bool is_const_v = false; template inline constexpr bool is_const_v = true; +#endif + template inline constexpr bool is_volatile_v = false; template