From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00641c01.pphosted.com (mx0b-00641c01.pphosted.com [205.220.177.146]) by sourceware.org (Postfix) with ESMTPS id A3F6B3856967; Sat, 8 Jul 2023 05:27:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org A3F6B3856967 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=gcc.gnu.org Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=gcc.gnu.org Received: from pps.filterd (m0247479.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3685ElhW004719; Sat, 8 Jul 2023 05:27:21 GMT Received: from mxout21.s.uw.edu (mxout21.s.uw.edu [140.142.32.139]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3rpyvyg94k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 08 Jul 2023 05:27:21 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 3685R7VK007104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 7 Jul 2023 22:27:07 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.234]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 3685QRbA030806 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 7 Jul 2023 22:27:07 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH v3 2/2] libstdc++: use new built-in trait __is_const Date: Fri, 7 Jul 2023 22:26:25 -0700 Message-ID: <20230708052625.66538-2-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230708052625.66538-1-kmatsui@gcc.gnu.org> References: <20230708052625.66538-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 5G3nKG3Pe5Ze5zEfCuWL7e7-cZlOYHuc X-Proofpoint-GUID: 5G3nKG3Pe5Ze5zEfCuWL7e7-cZlOYHuc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-08_02,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 clxscore=1034 priorityscore=1501 mlxlogscore=999 spamscore=0 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307080047 X-Spam-Status: No, score=-13.3 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NEUTRAL,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: 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 --- 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 -- 2.41.0