shared_ptr_rv.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
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// shared_ptr
13
14// shared_ptr(shared_ptr&& r);
15
16#include <memory>
17#include <cassert>
18
19struct A
20{
21    static int count;
22
23    A() {++count;}
24    A(const A&) {++count;}
25    ~A() {--count;}
26};
27
28int A::count = 0;
29
30int main()
31{
32    {
33        std::shared_ptr<A> pA(new A);
34        assert(pA.use_count() == 1);
35        assert(A::count == 1);
36        {
37            A* p = pA.get();
38            std::shared_ptr<A> pA2(std::move(pA));
39            assert(A::count == 1);
40#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
41            assert(pA.use_count() == 0);
42            assert(pA2.use_count() == 1);
43#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
44            assert(pA.use_count() == 2);
45            assert(pA2.use_count() == 2);
46#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
47            assert(pA2.get() == p);
48        }
49#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
50        assert(pA.use_count() == 0);
51        assert(A::count == 0);
52#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
53        assert(pA.use_count() == 1);
54        assert(A::count == 1);
55#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
56    }
57    assert(A::count == 0);
58    {
59        std::shared_ptr<A> pA;
60        assert(pA.use_count() == 0);
61        assert(A::count == 0);
62        {
63            std::shared_ptr<A> pA2(std::move(pA));
64            assert(A::count == 0);
65            assert(pA.use_count() == 0);
66            assert(pA2.use_count() == 0);
67            assert(pA2.get() == pA.get());
68        }
69        assert(pA.use_count() == 0);
70        assert(A::count == 0);
71    }
72    assert(A::count == 0);
73}
74