From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1FF2D385781A; Sat, 17 Oct 2020 21:48:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1FF2D385781A From: "anders.granlund.0 at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/97475] New: An unnamed class with a typedef name for linkage purposes having a method. Date: Sat, 17 Oct 2020 21:48:10 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: anders.granlund.0 at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Oct 2020 21:48:11 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97475 Bug ID: 97475 Summary: An unnamed class with a typedef name for linkage purposes having a method. Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: anders.granlund.0 at gmail dot com Target Milestone: --- Consider the following c++ program: typedef struct { void f(); } X; int main() { } It is not rejected by the compiler when compiling with "-std=3Dc++20 -pedantic-errors". The expected behaviour is that it should be rejected by section 9.2.3 parag= raph 10 in the c++ 20 standard: " 10 An unnamed class with a typedef name for linkage purposes shall not (10.1) =E2=80=94 declare any members other than non-static data members, me= mber enumerations, or member classes, (10.2) =E2=80=94 have any base classes or default member initializers, or (10.3) =E2=80=94 contain a lambda-expression, and all member classes shall also satisfy these requirements (recursively). " Note that clang correctly does reject the program: https://godbolt.org/z/rTerza=