| // |
| // shared_pointer_reinterpret_pointer_cast_test.cpp |
| // |
| // Copyright (c) 2016 Chris Glover |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt |
| // |
| |
| #include <boost/shared_ptr.hpp> |
| #include <boost/core/lightweight_test.hpp> |
| |
| struct X |
| {}; |
| |
| int main() |
| { |
| { |
| boost::shared_ptr<char> pc; |
| |
| boost::shared_ptr<int> pi = boost::reinterpret_pointer_cast<int>(pc); |
| BOOST_TEST(pi.get() == 0); |
| |
| boost::shared_ptr<X> px = boost::reinterpret_pointer_cast<X>(pc); |
| BOOST_TEST(px.get() == 0); |
| } |
| |
| { |
| boost::shared_ptr<int> pi(new int); |
| boost::shared_ptr<char> pc = boost::reinterpret_pointer_cast<char>(pi); |
| |
| boost::shared_ptr<int> pi2 = boost::reinterpret_pointer_cast<int>(pc); |
| BOOST_TEST(pi.get() == pi2.get()); |
| BOOST_TEST(!(pi < pi2 || pi2 < pi)); |
| BOOST_TEST(pi.use_count() == 3); |
| BOOST_TEST(pc.use_count() == 3); |
| BOOST_TEST(pi2.use_count() == 3); |
| } |
| |
| { |
| boost::shared_ptr<X> px(new X); |
| boost::shared_ptr<char> pc = boost::reinterpret_pointer_cast<char>(px); |
| |
| boost::shared_ptr<X> px2 = boost::reinterpret_pointer_cast<X>(pc); |
| BOOST_TEST(px.get() == px2.get()); |
| BOOST_TEST(!(px < px2 || px2 < px)); |
| BOOST_TEST(px.use_count() == 3); |
| BOOST_TEST(pc.use_count() == 3); |
| BOOST_TEST(px2.use_count() == 3); |
| } |
| |
| return boost::report_errors(); |
| } |
| |