[LC++]Why new behaviour of g++?

[Dr Mark H Phillips]

Hi,

The recent versions of g++ (in contrast to 3.3.* versions) will no
longer compile:

  #include <iostream>
  
  template<typename T> struct SixStore {
    int store; SixStore(): store(6) {}
  };
  
  template<typename T> struct Six: public SixStore<T> {
    int six() {return store;}
  };
  
  int main() {
    Six<char> s;
    std::cout<<"six = "<<s.six()<<std::endl;
  }

It complains with:

  tst3.cc: In member function `int Six<T>::six()':
  tst3.cc:8: error: `store' undeclared (first use this function)

If I remove the template stuff however, it compiles fine.  I had
a look on the GCC website and on the page

  http://gcc.gnu.org/bugs.html#known

I found the following information:

  This also affects members of base classes, see [14.6.2]: 
                template <typename> struct A
                {
                    int i, j;
                };
                
                template <typename T> struct B : A<T>
                {
                    int foo1() { return i; }       // error
                    int foo2() { return this->i; } // OK
                    int foo3() { return B<T>::i; } // OK
                    int foo4() { return A<T>::i; } // OK
                
                    using A<T>::j;
                    int foo5() { return j; }       // OK
                };

and foo1() seems to be pretty much what I was unsuccessfully trying to 
do!  But why does g++ now outlaw this?  Presumably the answer lies in
14.6.2 of the standard, but I do not have a copy of this and I can't
find it anywhere on the web.  Can anyone enlighten me on what is happening
here and why this kind of access to base-class members has been outlawed??

Thanks,

Mark.