{"id":2174159,"url":"http://patchwork.ozlabs.org/api/patches/2174159/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/CAD+gk=jyb+y=59CD-T1-SrbXt2y-SgT3fZECyyefwyrGYiLkSQ@mail.gmail.com/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"","list_archive_url":null,"date":"2025-12-15T08:24:35","name":"c++: initialize constructor_possible_p with LOCAL_CLASS_P","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"e74d3f4ed0dc162857112a3b5287c276ea38e74e","submitter":{"id":91423,"url":"http://patchwork.ozlabs.org/api/people/91423/?format=json","name":"Ben Wu","email":"soggysocks206@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/CAD+gk=jyb+y=59CD-T1-SrbXt2y-SgT3fZECyyefwyrGYiLkSQ@mail.gmail.com/mbox/","series":[{"id":485362,"url":"http://patchwork.ozlabs.org/api/series/485362/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=485362","date":"2025-12-15T08:24:35","name":"c++: initialize constructor_possible_p with LOCAL_CLASS_P","version":1,"mbox":"http://patchwork.ozlabs.org/series/485362/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2174159/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2174159/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=e9yQtaco;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; 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Mon, 15 Dec 2025\n 00:24:47 -0800 (PST)","MIME-Version":"1.0","From":"Ben Wu ","Date":"Mon, 15 Dec 2025 00:24:35 -0800","X-Gm-Features":"AQt7F2oPsg8Ytk6OIrKeYUZo3qNM2NpcXL-MHogVvlStmTObGTDrg89g7Fpt5GI","Message-ID":"\n ","Subject":"[PATCH] c++: initialize constructor_possible_p with LOCAL_CLASS_P","To":"gcc-patches@gcc.gnu.org","Cc":"Jason Merrill ","Content-Type":"multipart/mixed; boundary=\"0000000000001f3d3c0645f95876\"","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"Bootstrapped and regtested on x86_64-pc-linux-gnu. Any thoughts on this\napproach?\n\nPlease use the attached patch file if applying, thanks!\n\n-- 8< --\n\nPreviously, constructors were not possibly parsed while in a\ndeclarator, but we may have a constructor in a declarator as in this\nPR where a lambda expression containing a class definition is a\ndefault argument.\n\nWe can account for this by checking current_class_type when\ninitializing constructor_possible_p so that we allow for a constructor\ninside a declarator if LOCAL_CLASS_P (current_class_type).\n\nPR c++/121443\n\ngcc/cp/ChangeLog:\n\n* parser.cc (cp_parser_decl_specifier_seq): Consider LOCAL_CLASS_P\nin initializing constructor_possible_p.\n\ngcc/testsuite/ChangeLog:\n\n* g++.dg/parse/pr121443.C: New test.\n---\n gcc/cp/parser.cc | 4 +++-\n gcc/testsuite/g++.dg/parse/pr121443.C | 10 ++++++++++\n 2 files changed, 13 insertions(+), 1 deletion(-)\n create mode 100644 gcc/testsuite/g++.dg/parse/pr121443.C","diff":"From ea625e2ad0ca4826b84449e26602b840e7cf355b Mon Sep 17 00:00:00 2001\nFrom: benwu25 \nDate: Mon, 15 Dec 2025 00:14:25 -0800\nSubject: [PATCH] c++: initialize constructor_possible_p with LOCAL_CLASS_P\n\nPreviously, constructors were not possibly parsed while in a\ndeclarator, but we may have a constructor in a declarator as in this\nPR where a lambda expression containing a class definition is a\ndefault argument.\n\nWe can account for this by checking current_class_type when\ninitializing constructor_possible_p so that we allow for a constructor\ninside a declarator if LOCAL_CLASS_P (current_class_type).\n\n\tPR c++/121443\n\ngcc/cp/ChangeLog:\n\n\t* parser.cc (cp_parser_decl_specifier_seq): Consider LOCAL_CLASS_P\n\tin initializing constructor_possible_p.\n\ngcc/testsuite/ChangeLog:\n\n\t* g++.dg/parse/pr121443.C: New test.\n---\n gcc/cp/parser.cc | 4 +++-\n gcc/testsuite/g++.dg/parse/pr121443.C | 10 ++++++++++\n 2 files changed, 13 insertions(+), 1 deletion(-)\n create mode 100644 gcc/testsuite/g++.dg/parse/pr121443.C\n\ndiff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc\nindex 214dababeb5..7683c160b14 100644\n--- a/gcc/cp/parser.cc\n+++ b/gcc/cp/parser.cc\n@@ -17700,7 +17700,9 @@ cp_parser_decl_specifier_seq (cp_parser* parser,\n \t\t\t cp_decl_specifier_seq *decl_specs,\n \t\t\t int* declares_class_or_enum)\n {\n- bool constructor_possible_p = !parser->in_declarator_p;\n+ const bool maybe_lambda_p = (current_class_type\n+\t\t\t && LOCAL_CLASS_P (current_class_type));\n+ bool constructor_possible_p = !parser->in_declarator_p || maybe_lambda_p;\n bool found_decl_spec = false;\n cp_token *start_token = NULL;\n cp_decl_spec ds;\ndiff --git a/gcc/testsuite/g++.dg/parse/pr121443.C b/gcc/testsuite/g++.dg/parse/pr121443.C\nnew file mode 100644\nindex 00000000000..1022b3cdd90\n--- /dev/null\n+++ b/gcc/testsuite/g++.dg/parse/pr121443.C\n@@ -0,0 +1,10 @@\n+// { dg-do compile { target c++11 } }\n+\n+void f(int i = []() {\n+ struct X {\n+ int val;\n+ X(int v) : val(v) { }\n+ };\n+ X x(2);\n+ return x.val;\n+}()) {}\n-- \n2.43.0\n\n","prefixes":[]}