1// PR c++/51852 2// { dg-do compile { target c++11 } } 3// { dg-options "--param ggc-min-heapsize=0 --param ggc-min-expand=0" } 4 5template <typename, typename> 6class transformed {}; 7 8template <class R, class F> 9transformed<F, R> transform (R r, F f); 10 11template <typename, typename> 12class joined {}; 13 14template <typename T, typename U> 15joined<T, U> join (T t, U u); 16 17template <typename T, typename U, typename V, typename... Rest> 18auto join (T t, U u, V v, Rest... rest) -> decltype (join (join (t, u), v, rest...)); 19 20template <typename F, typename... Rs> 21auto polymorphic_transform (F f, Rs... rs) -> decltype (join (transform(rs, f)...)); 22 23int 24main () 25{ 26 polymorphic_transform (0, 0, 0); 27} 28