http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45942
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-10-09
18:18:56 UTC ---
you don't even need the partial specialization of Befriender:
template<class, int> class A;
template<class T, int C, A<T,C>&> class A;
template<class T, int C>
struct Befriender {
typedef B<T,C,A<T,C>&> type;
};
template<class T, int C> class A
{
friend typename Befriender<T,C,A>::type;
};
(I can't test this now, so it might be wrong, and it definitely isn't allowed
in C++03)
