1 //
2 //  shared_ptr_rv_pointer_cast_test.cpp
3 //
4 //  Copyright (c) 2016 Chris Glover
5 //
6 // Distributed under the Boost Software License, Version 1.0.
7 // See accompanying file LICENSE_1_0.txt or copy at
8 // http://www.boost.org/LICENSE_1_0.txt
9 //
10 
11 #include <boost/shared_ptr.hpp>
12 #include <boost/detail/lightweight_test.hpp>
13 
14 #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
15 
16 struct X
17 {};
18 
19 struct Y: public X
20 {};
21 
22 struct U
23 {
~UU24     virtual ~U() {}
25 };
26 
27 struct V: public U
28 {};
29 
30 struct W : public U
31 {};
32 
main()33 int main()
34 {
35     {
36         boost::shared_ptr<X> px(new Y);
37 
38         boost::shared_ptr<Y> py1 = boost::static_pointer_cast<Y>(px);
39         boost::shared_ptr<Y> py2 = boost::static_pointer_cast<Y>(std::move(px));
40         BOOST_TEST(!px);
41         BOOST_TEST(px.use_count() == 0);
42         BOOST_TEST(py1.get() == py2.get());
43         BOOST_TEST(!(py1 < py2 || py2 < py1));
44         BOOST_TEST(py1.use_count() == 2);
45         BOOST_TEST(py2.use_count() == 2);
46     }
47 
48     {
49         boost::shared_ptr<int const volatile> px(new int);
50 
51         boost::shared_ptr<int> px2 = boost::const_pointer_cast<int>(px);
52         boost::shared_ptr<int> px3 = boost::const_pointer_cast<int>(std::move(px));
53         BOOST_TEST(!px);
54         BOOST_TEST(px.use_count() == 0);
55         BOOST_TEST(px2.get() == px3.get());
56         BOOST_TEST(!(px2 < px3 || px2 < px3));
57         BOOST_TEST(px2.use_count() == 2);
58         BOOST_TEST(px3.use_count() == 2);
59     }
60 
61     {
62         boost::shared_ptr<char> pv(reinterpret_cast<char*>(new Y));
63 
64         boost::shared_ptr<Y> py1 = boost::reinterpret_pointer_cast<Y>(pv);
65         boost::shared_ptr<Y> py2 = boost::reinterpret_pointer_cast<Y>(std::move(pv));
66         BOOST_TEST(!pv);
67         BOOST_TEST(pv.use_count() == 0);
68         BOOST_TEST(py1.get() == py2.get());
69         BOOST_TEST(!(py1 < py2 || py2 < py1));
70         BOOST_TEST(py1.use_count() == 2);
71         BOOST_TEST(py2.use_count() == 2);
72     }
73 
74 #if !defined( BOOST_NO_RTTI )
75     {
76         boost::shared_ptr<U> pu(new V);
77 
78         boost::shared_ptr<V> pv1 = boost::dynamic_pointer_cast<V>(pu);
79         boost::shared_ptr<V> pv2 = boost::dynamic_pointer_cast<V>(std::move(pu));
80         BOOST_TEST(!pu);
81         BOOST_TEST(pu.use_count() == 0);
82         BOOST_TEST(pv1.get() == pv2.get());
83         BOOST_TEST(!(pv1 < pv2 || pv2 < pv1));
84         BOOST_TEST(pv1.use_count() == 2);
85         BOOST_TEST(pv2.use_count() == 2);
86     }
87 
88     {
89         boost::shared_ptr<U> pu(new V);
90         boost::shared_ptr<W> pw = boost::dynamic_pointer_cast<W>(std::move(pu));
91         BOOST_TEST(!pw);
92         BOOST_TEST(pu);
93     }
94 #endif // !defined( BOOST_NO_RTTI )
95 
96     return boost::report_errors();
97 }
98 
99 #else // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
100 
main()101 int main()
102 {
103     return 0;
104 }
105 
106 #endif // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
107