1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <memory> 11 12 // template <class T> 13 // struct hash<shared_ptr<T>> 14 // { 15 // typedef shared_ptr<T> argument_type; 16 // typedef size_t result_type; 17 // size_t operator()(const shared_ptr<T>& p) const; 18 // }; 19 20 #include <memory> 21 #include <cassert> 22 23 int main() 24 { 25 int* ptr = new int; 26 std::shared_ptr<int> p(ptr); 27 std::hash<std::shared_ptr<int> > f; 28 std::size_t h = f(p); 29 assert(h == std::hash<int*>()(ptr)); 30 } 31