[Bug c++/38501] typedef confuses the name of the template and the name of result

["pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-12-12 01:46 -------
No GCC 4.3 and above is doing the correct thing.  This code is invalid but no
diagnostic is required by the C++ standard.

See <http://gcc.gnu.org/gcc-4.3/porting_to.html>:
Name lookup changes

GCC by default no longer accepts code such as

template <class _Tp> class auto_ptr {};
template <class _Tp>
struct counted_ptr
{
  auto_ptr<_Tp> auto_ptr();
};
but will issue the diagnostic

error: declaration of 'auto_ptr<_Tp> counted_ptr<_Tp>::auto_ptr()'
error: changes meaning of 'auto_ptr' from 'class auto_ptr<_Tp>'
The reference to struct auto_ptr needs to be qualified here, or the name of the
member function changed to be unambiguous.

template <class _Tp> class auto_ptr {};
template <class _Tp>
struct counted_ptr
{
  ::auto_ptr<_Tp> auto_ptr();
};
In addition, -fpermissive can be used as a temporary workaround to convert the
error into a warning until the code is fixed. Note that then in some case name
lookup will not be standard conforming.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38501