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
21struct A;  // purposefully incomplete
22
23int main()
24{
25    static_assert((std::is_same<std::weak_ptr<A>::element_type, A>::value), "");
26}
27