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Mon, 20 Mar 2023 13:14:52 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout23.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 32KDEokX011921 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Mar 2023 06:14:50 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.245]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 32KDEoGN018599 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 20 Mar 2023 06:14:50 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, ppalka@redhat.com, Ken Matsui Subject: [PATCH 2/2] libstdc++: use new built-in trait __is_reference Date: Mon, 20 Mar 2023 06:14:44 -0700 Message-Id: <20230320131444.7505-2-kmatsui@cs.washington.edu> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320131444.7505-1-kmatsui@cs.washington.edu> References: <20230320131444.7505-1-kmatsui@cs.washington.edu> MIME-Version: 1.0 X-Proofpoint-GUID: _3H2b012XxWCz2AmZnyYokDFyApKFieV X-Proofpoint-ORIG-GUID: _3H2b012XxWCz2AmZnyYokDFyApKFieV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-20_08,2023-03-20_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=764 spamscore=0 malwarescore=0 clxscore=1015 phishscore=0 impostorscore=0 priorityscore=1501 adultscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303200112 X-Spam-Status: No, score=-14.5 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Ken Matsui via Gcc-patches From: Ken Matsui Reply-To: Ken Matsui Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760892746478949507?= X-GMAIL-MSGID: =?utf-8?q?1760892746478949507?= This patch lets libstdc++ use new built-in trait __is_reference. libstdc++-v3/ChangeLog: * include/std/type_traits (is_reference): Use __is_reference built-in trait. --- libstdc++-v3/include/std/type_traits | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 2bd607a8b8f..18408d8ceb6 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -639,6 +639,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Composite type categories. /// is_reference +#if __has_builtin(__is_reference) + template + struct is_reference + : public integral_constant + { }; +#else template struct is_reference : public false_type @@ -653,6 +659,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct is_reference<_Tp&&> : public true_type { }; +#endif /// is_arithmetic template