1// PR c++/56971 2 3template <typename T> 4class rp { 5}; 6 7template <template <typename> class P> 8struct b { 9 template <class, template <typename> class FriendP> 10 friend void f(b<FriendP> from); 11}; 12 13template <class, template <typename> class P> 14void f(b<P> from) { 15} 16 17int main() { 18 b<rp> v; 19 f<int>(v); 20 return 0; 21} 22