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[69.118.112.187]) by smtp.gmail.com with ESMTPSA id bt11-20020ac8690b000000b00423e8909bfesm866601qtb.6.2024.01.05.08.50.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jan 2024 08:50:58 -0800 (PST) From: Patrick Palka To: gcc-patches@gcc.gnu.org Cc: jason@redhat.com, Patrick Palka Subject: [PATCH] c++: address of NTTP object as targ [PR113242] Date: Fri, 5 Jan 2024 11:50:56 -0500 Message-ID: <20240105165056.571235-1-ppalka@redhat.com> X-Mailer: git-send-email 2.43.0.254.ga26002b628 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-14.9 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, 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+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1787270024596066084 X-GMAIL-MSGID: 1787270024596066084 Bootstrapped and regtested on x86_64-pc-linux-gnu, does this look OK for trunk and perhaps 13? -- >8 -- invalid_tparm_referent_p was rejecting using the address of a class NTTP object as a template argument, but this should be fine. PR c++/113242 gcc/cp/ChangeLog: * pt.cc (invalid_tparm_referent_p) : Suppress DECL_ARTIFICIAL rejection test for class NTTP objects. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/nontype-class61.C: New test. --- gcc/cp/pt.cc | 3 ++- gcc/testsuite/g++.dg/cpp2a/nontype-class61.C | 27 ++++++++++++++++++++ 2 files changed, 29 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/cpp2a/nontype-class61.C diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index 154ac76cb65..8c7d178328d 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -7219,7 +7219,8 @@ invalid_tparm_referent_p (tree type, tree expr, tsubst_flags_t complain) * a string literal (5.13.5), * the result of a typeid expression (8.2.8), or * a predefined __func__ variable (11.4.1). */ - else if (VAR_P (decl) && DECL_ARTIFICIAL (decl)) + else if (VAR_P (decl) && !DECL_NTTP_OBJECT_P (decl) + && DECL_ARTIFICIAL (decl)) { if (complain & tf_error) error ("the address of %qD is not a valid template argument", diff --git a/gcc/testsuite/g++.dg/cpp2a/nontype-class61.C b/gcc/testsuite/g++.dg/cpp2a/nontype-class61.C new file mode 100644 index 00000000000..90805a05ecf --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp2a/nontype-class61.C @@ -0,0 +1,27 @@ +// PR c++/113242 +// { dg-do compile { target c++20 } } + +struct wrapper { + int n; +}; + +template +void f1() { + static_assert(X.n == 42); +} + +template +void f2() { + static_assert(X->n == 42); +} + +template +void g() { + f1(); + f2<&X>(); +} + +int main() { + constexpr wrapper X = {42}; + g(); +}