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> class weak_ptr 13 // { 14 // public: 15 // typedef T element_type; 16 // ... 17 // }; 18 19 #include <memory> 20 21 struct A; // purposefully incomplete 22 23 int main() 24 { 25 static_assert((std::is_same<std::weak_ptr<A>::element_type, A>::value), ""); 26 } 27