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Wed, 22 Mar 2023 17:50:17 +0000 (UTC) Received: from localhost (unknown [10.33.36.149]) by smtp.corp.redhat.com (Postfix) with ESMTP id D00F3202701E; Wed, 22 Mar 2023 17:50:16 +0000 (UTC) To: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: [committed] libstdc++: Define __cpp_lib_constexpr_algorithms in (LWG 3792) Date: Wed, 22 Mar 2023 17:50:16 +0000 Message-Id: <20230322175016.408028-1-jwakely@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-11.8 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_H2, SPF_HELO_NONE, SPF_NONE, 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: Jonathan Wakely via Gcc-patches From: Jonathan Wakely Reply-To: Jonathan Wakely 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?1761091484824191466?= X-GMAIL-MSGID: =?utf-8?q?1761091484824191466?= Tested powerpc64le-linux, pushed to trunk. -- >8-- We actually defined this macro in at one point, but I removed it in r10-7901-g2025db692e9ed1. libstdc++-v3/ChangeLog: * include/std/utility (__cpp_lib_constexpr_algorithms): Define, as per LWG 3792. * testsuite/20_util/exchange/constexpr.cc: Check for it. --- libstdc++-v3/include/std/utility | 4 ++++ libstdc++-v3/testsuite/20_util/exchange/constexpr.cc | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/libstdc++-v3/include/std/utility b/libstdc++-v3/include/std/utility index 43d8765228c..006b19c00fc 100644 --- a/libstdc++-v3/include/std/utility +++ b/libstdc++-v3/include/std/utility @@ -86,6 +86,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #if __cplusplus >= 201402L #define __cpp_lib_exchange_function 201304L +#if __cplusplus > 201703L +# define __cpp_lib_constexpr_algorithms 201806L +#endif + /// Assign @p __new_val to @p __obj and return its previous value. template _GLIBCXX20_CONSTEXPR diff --git a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc index 6c130f772f8..2ec13044681 100644 --- a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc +++ b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc @@ -20,6 +20,12 @@ #include +#ifndef __cpp_lib_constexpr_algorithms +# error "Feature test macro for constexpr std::exchange is missing in " +#elif __cpp_lib_constexpr_algorithms < 201806L +# error "Feature test macro for constexpr std::exchange has wrong value in " +#endif + constexpr bool test() {