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Wed, 19 Jun 2024 12:35:53 -0400 X-MC-Unique: 2RYsq39UOay0SKy9htiLeQ-1 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 03E8D19560B5; Wed, 19 Jun 2024 16:35:51 +0000 (UTC) Received: from localhost (unknown [10.42.28.182]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 56AD81956087; Wed, 19 Jun 2024 16:35:48 +0000 (UTC) From: Jonathan Wakely To: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: [committed] libstdc++: Add conditional noexcept to std::pair default ctor Date: Wed, 19 Jun 2024 17:35:32 +0100 Message-ID: <20240619163547.1791344-1-jwakely@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-10.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, RCVD_IN_SBL_CSS, SPF_HELO_NONE, SPF_NONE, 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: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Tested x86_64-linux. Pushed to trunk. -- >8 -- Most of std::pair constructors implemented using C++20 concepts have a conditional noexcept-specifier, but the default constructor doesn't. This fixes that. libstdc++-v3/ChangeLog: * include/bits/stl_pair.h [__cpp_lib_concepts] (pair()): Add conditional noexcept. --- libstdc++-v3/include/bits/stl_pair.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libstdc++-v3/include/bits/stl_pair.h b/libstdc++-v3/include/bits/stl_pair.h index 0c1e5719a1a..0d60eaba194 100644 --- a/libstdc++-v3/include/bits/stl_pair.h +++ b/libstdc++-v3/include/bits/stl_pair.h @@ -344,6 +344,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION explicit(__not_<__and_<__is_implicitly_default_constructible<_T1>, __is_implicitly_default_constructible<_T2>>>()) pair() + noexcept(is_nothrow_default_constructible_v<_T1> + && is_nothrow_default_constructible_v<_T2>) requires is_default_constructible_v<_T1> && is_default_constructible_v<_T2> : first(), second()