[Bug c++/16067] New: scope resolution failure on base class members when derived and base classes are templates

[Bug c++/16067] New: scope resolution failure on base class members when derived and base classes are templates

[aac76 at bellsouth dot net]

gcc -v 
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.0/specs 
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --with-system-zlib --enable-__cxa_atexit 
--disable-libunwind-exceptions --host=i386-redhat-linux 
Thread model: posix 
gcc version 3.4.0 20040613 (Red Hat Linux 3.4.0-5) 
 
The following code works great in GCC 3.3.x but chokes in 3.4.0: 
 
template<class T> 
class A 
{ 
protected: 
  T t_; 
}; 
 
template<class T> 
class B: public A<T> 
{ 
public: 
  B() 
  { 
    t_; 
  } 
}; 
 
int main(int argc, char** argv) 
{ 
  B<int> b; 
} 
 
GCC 3.4.0 produces the following error on this code: 
bug.cc: In constructor `B<T>::B()': 
bug.cc:14: error: `t_' undeclared (first use this function) 
bug.cc:14: error: (Each undeclared identifier is reported only once for each 
function it appears in.) 
 
Simply changing the "t_;" line inside B's ctor to "A<T>::t_;" causes it to 
smarten up, but it doesn't seem like explicit scope resolution should be 
required in this context.  Also, the problem only appears when B's template 
argument is passed along to A.  If B explicitly specializes A it works fine 
too.

-- 
           Summary: scope resolution failure on base class members when
                    derived and base classes are templates
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aac76 at bellsouth dot net
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-redhat-linux
  GCC host triplet: i386-redhat-linux
GCC target triplet: i386-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16067

[Bug c++/16067] scope resolution failure on base class members when derived and base classes are templates

[aac76 at bellsouth dot net]

------- Additional Comments From aac76 at bellsouth dot net  2004-06-18 23:05 -------
Created an attachment (id=6572)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6572&action=view)
testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16067

[Bug c++/16067] scope resolution failure on base class members when derived and base classes are templates

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-06-18 23:07 -------
Did you read the changes page <http://gcc.gnu.org/gcc-3.4/changes.html> at all?

This is listed there.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16067

[Bug c++/16067] scope resolution failure on base class members when derived and base classes are templates

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-01-13 15:46 -------
close as a dup of bug 12970.

*** This bug has been marked as a duplicate of 12970 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16067

[Bug c++/16067] scope resolution failure on base class members when derived and base classes are templates

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-01-13 15:46 -------
Reopening to ..


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16067