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Date: Fri, 23 Jan 2004 12:04:00 -0000
From: "mattyt-bugzilla at tpg dot com dot au" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20040123120418.13830.mattyt-bugzilla@tpg.com.au>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug c++/13830] New: Invalid covariant type for identical type.
X-Bugzilla-Reason: CC
X-SW-Source: 2004-01/txt/msg02914.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

The code below:

template < class TP >
class A {
public:
   
  friend class X;
   
  typedef X * XP;
   
  class X {};
   
  virtual XP method();
   
};
 
template < class TP >
class B : public A< TP > {
public:
   
  virtual typename A< TP >::XP method();
   
};
 
int main() {
  B<int> a;
}

gives the error in 3.4:

restor5.cc: In instantiation of `B<int>':
restor5.cc:24:   instantiated from here
restor5.cc:19: error: invalid covariant return type for `typename A<TP>::XP
B<TP>::method() [with TP = int]'
restor5.cc:11: error:   overriding `X* A<TP>::method() [with TP = int]'

as best as I can tell, the type is identical and so it should compile.

-- 
           Summary: Invalid covariant type for identical type.
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mattyt-bugzilla at tpg dot com dot au
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13830