From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-403872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 14236 invoked by alias); 17 Oct 2012 13:25:51 -0000
Received: (qmail 14002 invoked by uid 48); 17 Oct 2012 13:25:31 -0000
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/54948] New: template unnecessarily displayed as "A< template-parameter-1-1 >" not "A<T>"
Date: Wed, 17 Oct 2012 13:25:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: redi 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-Changed-Fields:
Message-ID: <bug-54948-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
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: 2012-10/txt/msg01548.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54948

             Bug #: 54948
           Summary: template unnecessarily displayed as "A<
                    template-parameter-1-1 >" not "A<T>"
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: enhancement
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: redi@gcc.gnu.org


template<typename> struct A;

template<typename T> struct A { A(Y); };

A<int> a;

This invalid code produces:

tp.cc: In instantiation of 'struct A<int>':
tp.cc:5:8:   required from here
tp.cc:3:36: error: 'A< <template-parameter-1-1> >::Y' has incomplete type
 template<typename T> struct A { A(Y); };
                                    ^
tp.cc:3:29: error: declaration of 'struct A<int>'
 template<typename T> struct A { A(Y); };
                             ^

This is correct, but "A< <template-parameter-1-1> >::Y" is rather ugly.

At the point of the error the parameter has a name, so "A<T>::Y" could be shown
instead.