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- //
- // 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/detail/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();
- }
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