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[8.43.85.97]) by mx.google.com with ESMTPS id ce10-20020a170906b24a00b0096f904e9075si3619069ejb.592.2023.06.10.19.50.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Jun 2023 19:50:03 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) client-ip=8.43.85.97; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=bGY8h21y; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 7A9583854E4E for ; Sun, 11 Jun 2023 02:48:57 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7A9583854E4E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1686451737; bh=Re+wPkeG3LeAEs7CKV4zDqUZK0LHK0auoJKm2Owh5gA=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=bGY8h21y9UVTwi9qtw5/n4CjqgBXhqTjKkYJdKMLsAytR0rmPDK3C9DrqDTLjTdM2 SN05K4k152HFlbgcHGm9ModndBMIc1NERdKDfOuHTwxlkEBP/eTCYw+CYhDQozUrjL YUDIVWcEPtex0Lwb1OWNP9V7Wg/5/qkgqdIgC8+k= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mx0b-00641c01.pphosted.com (mx0b-00641c01.pphosted.com [205.220.177.146]) by sourceware.org (Postfix) with ESMTPS id C11FB3854E57; Sun, 11 Jun 2023 02:48:14 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C11FB3854E57 Received: from pps.filterd (m0247478.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35B2luNb004468; Sun, 11 Jun 2023 02:48:14 GMT Received: from mxout21.s.uw.edu (mxout21.s.uw.edu [140.142.32.139]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3r53ay0dd0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 11 Jun 2023 02:48:14 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 35B2mCBa005417 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 10 Jun 2023 19:48:12 -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 35B2l2eD007901 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Sat, 10 Jun 2023 19:48:12 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH v4 2/6] libstdc++: use new built-in trait __is_reference for std::is_reference Date: Sat, 10 Jun 2023 19:43:09 -0700 Message-ID: <20230611024657.42846-3-kmatsui@cs.washington.edu> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230611024657.42846-1-kmatsui@cs.washington.edu> References: <20230402075314.39853-1-kmatsui@cs.washington.edu> <20230611024657.42846-1-kmatsui@cs.washington.edu> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: q31Lo6v3XolRsSljZrA_HkjkBOhKooDW X-Proofpoint-GUID: q31Lo6v3XolRsSljZrA_HkjkBOhKooDW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-10_18,2023-06-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=901 suspectscore=0 adultscore=0 clxscore=1015 mlxscore=0 malwarescore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306110024 X-Spam-Status: No, score=-14.0 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_PASS, 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 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?1761403419712597188?= X-GMAIL-MSGID: =?utf-8?q?1768372886430346838?= This patch gets std::is_reference to dispatch to new built-in trait __is_reference. libstdc++-v3/ChangeLog: * include/std/type_traits (is_reference): Use __is_reference built-in trait. (is_reference_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 0e7a9c9c7f3..b2eb4bd3e7f 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 __bool_constant<__is_reference(_Tp)> + { }; +#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 @@ -3193,11 +3200,7 @@ template template inline constexpr bool is_function_v = is_function<_Tp>::value; template - inline constexpr bool is_reference_v = false; -template - inline constexpr bool is_reference_v<_Tp&> = true; -template - inline constexpr bool is_reference_v<_Tp&&> = true; + inline constexpr bool is_reference_v = __is_reference(_Tp); template inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; template