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 Y> explicit shared_ptr(Y* p);
13 
14 #include <memory>
15 #include <cassert>
16 
17 struct A
18 {
19     static int count;
20 
21     A() {++count;}
22     A(const A&) {++count;}
23     ~A() {--count;}
24 };
25 
26 int A::count = 0;
27 
28 int main()
29 {
30     {
31     A* ptr = new A;
32     std::shared_ptr<A> p(ptr);
33     assert(A::count == 1);
34     assert(p.use_count() == 1);
35     assert(p.get() == ptr);
36     }
37     assert(A::count == 0);
38     {
39     A* ptr = new A;
40     std::shared_ptr<void> p(ptr);
41     assert(A::count == 1);
42     assert(p.use_count() == 1);
43     assert(p.get() == ptr);
44     }
45     assert(A::count == 0);
46 }
47