From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13683 invoked by alias); 15 Oct 2014 02:31:44 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 13628 invoked by uid 48); 15 Oct 2014 02:31:37 -0000 From: "brooks at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/63540] New: Erroneous "'Derived' declares a move constructor or move assignment operator" in error. Date: Wed, 15 Oct 2014 02:31:00 -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: 4.9.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: brooks at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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 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-SW-Source: 2014-10/txt/msg01108.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D63540 Bug ID: 63540 Summary: Erroneous "'Derived' declares a move constructor or move assignment operator" in error. Product: gcc Version: 4.9.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: brooks at gcc dot gnu.org Consider the following reduced testcase: ---- template (0) =3D 0)> int break_it(); template int break_it(); struct Base { Base(const Base &); void operator=3D(Base &&); }; struct Derived : Base { using Base::operator=3D; }; int a =3D break_it(); Derived v(v); ---- With a recent 4.9, it fails with an erroneous error: ---- $ gcc-archive/4.9/215880/bin/g++ --std=3Dgnu++11 t.cc -c -o t.o t.cc:13:12: error: use of deleted function =E2=80=98Derived::Derived(const = Derived&)=E2=80=99 Derived v(v); ^ t.cc:8:8: note: =E2=80=98Derived::Derived(const Derived&)=E2=80=99 is impli= citly declared as deleted because =E2=80=98Derived=E2=80=99 declares a move constructor or mo= ve assignment operator struct Derived : Base { ^ ---- The same erroneous error occurs on trunk. The call to 'Derived::operator=3D' in a SFINAE context within break_it seem= s to be confusing GCC about which special members Derived declares. >>From gcc-bugs-return-464088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 15 02:42:22 2014 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 16664 invoked by alias); 15 Oct 2014 02:42:21 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 16636 invoked by uid 48); 15 Oct 2014 02:42:18 -0000 From: "ppluzhnikov at google dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/63540] Erroneous "'Derived' declares a move constructor or move assignment operator" in error. Date: Wed, 15 Oct 2014 02:42:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 4.9.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ppluzhnikov at google dot com X-Bugzilla-Status: UNCONFIRMED 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: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-10/txt/msg01109.txt.bz2 Content-length: 418 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63540 Paul Pluzhnikov changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ppluzhnikov at google dot com --- Comment #1 from Paul Pluzhnikov --- Google ref: b/17785687