1 template <int I> struct B { }; 2 3 template <class T> 4 B<T::I> f(); 5 6 class A 7 { 8 static const int I = 42; 9 template <class T> friend B<T::I> f(); 10 }; 11 main()12 int main() 13 { 14 f<A>(); 15 } 16