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[130.44.159.43]) by smtp.gmail.com with ESMTPSA id z17-20020ac84551000000b002f39b99f689sm4932055qtn.35.2022.05.15.09.28.13 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 May 2022 09:28:14 -0700 (PDT) To: gcc-patches@gcc.gnu.org Subject: [pushed] c++: array {}-init [PR105589] Date: Sun, 15 May 2022 12:28:12 -0400 Message-Id: <20220515162812.3970024-1-jason@redhat.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-13.3 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_LOW, 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: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Jason Merrill via Gcc-patches From: Jason Merrill Reply-To: Jason Merrill Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" My patch for 105191 made us use build_value_init more frequently from build_vec_init_expr, but build_value_init doesn't like to be called to initialize a class in a template. That's caused trouble in the past, and seems like a strange restriction, so let's fix it. Tested x86_64-pc-linux-gnu, applying to trunk. PR c++/105589 PR c++/105191 PR c++/92385 gcc/cp/ChangeLog: * init.cc (build_value_init): Handle class in template. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/initlist-array16.C: New test. --- gcc/cp/init.cc | 7 +++---- gcc/testsuite/g++.dg/cpp0x/initlist-array16.C | 11 +++++++++++ 2 files changed, 14 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp0x/initlist-array16.C base-commit: c5397682aff4ae9ced15ddc74971b9b6e218b664 diff --git a/gcc/cp/init.cc b/gcc/cp/init.cc index f1ed9336dc9..a4a0a0ac0c2 100644 --- a/gcc/cp/init.cc +++ b/gcc/cp/init.cc @@ -343,10 +343,6 @@ build_value_init (tree type, tsubst_flags_t complain) A program that calls for default-initialization or value-initialization of an entity of reference type is ill-formed. */ - /* The AGGR_INIT_EXPR tweaking below breaks in templates. */ - gcc_assert (!processing_template_decl - || (SCALAR_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE)); - if (CLASS_TYPE_P (type) && type_build_ctor_call (type)) { tree ctor @@ -354,6 +350,9 @@ build_value_init (tree type, tsubst_flags_t complain) NULL, type, LOOKUP_NORMAL, complain); if (ctor == error_mark_node || TREE_CONSTANT (ctor)) return ctor; + if (processing_template_decl) + /* The AGGR_INIT_EXPR tweaking below breaks in templates. */ + return build_min (CAST_EXPR, type, NULL_TREE); tree fn = NULL_TREE; if (TREE_CODE (ctor) == CALL_EXPR) fn = get_callee_fndecl (ctor); diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist-array16.C b/gcc/testsuite/g++.dg/cpp0x/initlist-array16.C new file mode 100644 index 00000000000..bb1d8d84704 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/initlist-array16.C @@ -0,0 +1,11 @@ +// PR c++/105589 +// { dg-do compile { target c++11 } } + +struct X { X(); }; + +struct array { X m[2]; }; + +template +void f() { + array w = array{}; +}