1//
2// shared_pointer_reinterpret_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/core/lightweight_test.hpp>
13
14struct X
15{};
16
17int main()
18{
19 {
20 boost::shared_ptr<char> pc;
21
22 boost::shared_ptr<int> pi = boost::reinterpret_pointer_cast<int>(r: pc);
23 BOOST_TEST(pi.get() == 0);
24
25 boost::shared_ptr<X> px = boost::reinterpret_pointer_cast<X>(r: pc);
26 BOOST_TEST(px.get() == 0);
27 }
28
29 {
30 boost::shared_ptr<int> pi(new int);
31 boost::shared_ptr<char> pc = boost::reinterpret_pointer_cast<char>(r: pi);
32
33 boost::shared_ptr<int> pi2 = boost::reinterpret_pointer_cast<int>(r: pc);
34 BOOST_TEST(pi.get() == pi2.get());
35 BOOST_TEST(!(pi < pi2 || pi2 < pi));
36 BOOST_TEST(pi.use_count() == 3);
37 BOOST_TEST(pc.use_count() == 3);
38 BOOST_TEST(pi2.use_count() == 3);
39 }
40
41 {
42 boost::shared_ptr<X> px(new X);
43 boost::shared_ptr<char> pc = boost::reinterpret_pointer_cast<char>(r: px);
44
45 boost::shared_ptr<X> px2 = boost::reinterpret_pointer_cast<X>(r: pc);
46 BOOST_TEST(px.get() == px2.get());
47 BOOST_TEST(!(px < px2 || px2 < px));
48 BOOST_TEST(px.use_count() == 3);
49 BOOST_TEST(pc.use_count() == 3);
50 BOOST_TEST(px2.use_count() == 3);
51 }
52
53 return boost::report_errors();
54}
55
56

source code of boost/libs/smart_ptr/test/shared_ptr_reinterpret_pointer_cast_test.cpp