deriving template classes: gcc 3.4 complains

[Matt Austern]

On Oct 1, 2003, at 11:51 AM, Gerald Pfeifer wrote:

> On Wed, 1 Oct 2003, Joachim Schoeberl wrote:
>> test34.cpp: In constructor `derived<A>::derived(int)':
>> test34.cpp:14: error: `i' undeclared (first use this function)
>> test34.cpp:14: error: (Each undeclared identifier is reported only 
>> once
>> for each function it appears in.)
>>
>> Is there something wrong with my code ?
>
> I believe the third item under C++ at
>
>   http://gcc.gnu.org/gcc-3.4/changes.html
>
> might be relevant here.

For more information, possibly more than you want, see section 9.4.2, 
"Dependent Base Classes", of Vandevoorde and Josuttis's book _C++ 
Templates: The Complete Guide_.

This behavior is a fairly straightforward consequence of C++'s name 
lookup rules.  (Of course, I also have to admit that I didn't realize 
this was a consequence of those rules until I started using a compiler 
that actually enforced them.  I think HP's compiler may have been the 
first.)

			--Matt