[Bug c++/19189] New: A derived template cannot access base template members without using this

[amos at ilogix dot com]

If you try to access a member of a base template from a derived template (event
if the member is public) you are getting a compilation error.
This is a regression related to previous versions of the compiler (worked in
3.3.3) and I think its not ANSI C++ as well.

For example, compiling the following code (in test.cpp) will issue these errors:
$ g++ -c test.cpp 
test.cpp: In member function `virtual bool Derived<Concept>::test(Concept)':
test.cpp:21: error: `xxx' undeclared (first use this function)
test.cpp:21: error: (Each undeclared identifier is reported only once for each f
                                               unction it appears in.)

------------
test.cpp
------------
// The base template
template <class Concept> class Base 
{
public :
    int xxx;     
};

// The derived template
template <class Concept> class Derived : public Base<Concept> 
{
public :
	bool test(Concept p)
	{
        return (xxx > 10); // to fix this I need to modify it to: return
(this->xxx > 10);
    }
};

// usage
bool call_test(Derived<int>& d)
{
	return d.test(5);
}

-- 
           Summary: A derived template cannot access base template members
                    without using this
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amos at ilogix dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: gcc version 3.4.2 (mingw-special)
  GCC host triplet: MinGW on WinXP
GCC target triplet: MinGW on WinXP


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19189