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 // unique_ptr
13 
14 // Test unique_ptr converting move assignment
15 
16 #include <memory>
17 #include <cassert>
18 
19 struct A
20 {
21     static int count;
22     A() {++count;}
23     A(const A&) {++count;}
24     virtual ~A() {--count;}
25 };
26 
27 int A::count = 0;
28 
29 struct B
30     : public A
31 {
32     static int count;
33     B() {++count;}
34     B(const B&) {++count;}
35     virtual ~B() {--count;}
36 };
37 
38 int B::count = 0;
39 
40 int main()
41 {
42     {
43     std::unique_ptr<B> s(new B);
44     A* p = s.get();
45     std::unique_ptr<A> s2(new A);
46     assert(A::count == 2);
47     s2 = std::move(s);
48     assert(s2.get() == p);
49     assert(s.get() == 0);
50     assert(A::count == 1);
51     assert(B::count == 1);
52     }
53     assert(A::count == 0);
54     assert(B::count == 0);
55 }
56