template <class T, class D> struct hash<unique_ptr<T, D> >;
Requires: The template specialization shall meet the requirements of class template hash ([unord.hash]). For an object p of type UP, where UP is unique_ptr<T, D>, hash<UP>()(p) shall evaluate to the same value as hash<typename UP::pointer>()(p.get()). The specialization hash<typename UP::pointer> shall be well-formed.
template <class T> struct hash<shared_ptr<T> >;
Requires: The template specialization shall meet the requirements of class template hash ([unord.hash]). For an object p of type shared_ptr<T>, hash<shared_ptr<T> >()(p) shall evaluate to the same value as hash<T*>()(p.get()).