From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-373424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 21104 invoked by alias); 9 Nov 2011 12:24:16 -0000
Received: (qmail 21074 invoked by uid 22791); 9 Nov 2011 12:24:13 -0000
X-SWARE-Spam-Status: No, hits=-2.9 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 09 Nov 2011 12:24:00 +0000
From: "daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/51048] Class template inheritance doesn't work well with function-local types
Date: Wed, 09 Nov 2011 12:38:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: daniel.kruegler at googlemail 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-Changed-Fields: CC
Message-ID: <bug-51048-4-0aXgTzLkJm@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-51048-4@http.gcc.gnu.org/bugzilla/>
References: <bug-51048-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2011-11/txt/msg00920.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51048

Daniel Kr=C3=BCgler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler at
                   |                            |googlemail dot com

--- Comment #1 from Daniel Kr=C3=BCgler <daniel.kruegler at googlemail dot =
com> 2011-11-09 12:23:54 UTC ---
Simplifying the test case and compiled with

-std=3Dc++0x -Wall

//---
template<typename X>
struct A {
  virtual void DoPush(X const& x) =3D 0; // Line 3
  void Push(X const& x) { DoPush(x); }
};

template<typename X>
struct B : A<X> {
  using A<X>::Push;
  virtual void DoPush(X const&) { }
};

int main() {
  enum S { };
  B<S>().Push(S());
}
//---

"main.cpp|3|error: 'void A<X>::DoPush(const X&) [with X =3D main()::S]', de=
clared
using local type 'const main()::S', is used but never defined [-fpermissive=
]|"

It is important that the virtual function is pure. Validated for gcc  4.7.0
20111105 (experimental).