1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <memory>
10 
11 // template<class T> class weak_ptr
12 
13 // weak_ptr();
14 
15 #include <memory>
16 #include <cassert>
17 
18 struct A;
19 
20 int main()
21 {
22     std::weak_ptr<A> p;
23     assert(p.use_count() == 0);
24 }
25