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- //
- // weak_ptr_move_test.cpp
- //
- // Copyright (c) 2007 Peter Dimov
- //
- // 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/weak_ptr.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <utility>
- #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- struct X
- {
- static long instances;
- X()
- {
- ++instances;
- }
- ~X()
- {
- --instances;
- }
- private:
- X( X const & );
- X & operator=( X const & );
- };
- long X::instances = 0;
- int main()
- {
- BOOST_TEST( X::instances == 0 );
- {
- boost::shared_ptr<X> p_( new X );
- boost::weak_ptr<X> p( p_ );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p.use_count() == 1 );
- boost::weak_ptr<X> p2( std::move( p ) );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p2.use_count() == 1 );
- BOOST_TEST( p.expired() );
- boost::weak_ptr<void> p3( std::move( p2 ) );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p3.use_count() == 1 );
- BOOST_TEST( p2.expired() );
- p_.reset();
- BOOST_TEST( X::instances == 0 );
- BOOST_TEST( p3.expired() );
- }
- {
- boost::shared_ptr<X> p_( new X );
- boost::weak_ptr<X> p( p_ );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p.use_count() == 1 );
- boost::weak_ptr<X> p2;
- p2 = static_cast< boost::weak_ptr<X> && >( p );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p2.use_count() == 1 );
- BOOST_TEST( p.expired() );
- boost::weak_ptr<void> p3;
- p3 = std::move( p2 );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p3.use_count() == 1 );
- BOOST_TEST( p2.expired() );
- p_.reset();
- BOOST_TEST( X::instances == 0 );
- BOOST_TEST( p3.expired() );
- }
- {
- boost::shared_ptr<X> p_( new X );
- boost::weak_ptr<X> p( p_ );
- BOOST_TEST( X::instances == 1 );
- BOOST_TEST( p.use_count() == 1 );
- boost::shared_ptr<X> p_2( new X );
- boost::weak_ptr<X> p2( p_2 );
- BOOST_TEST( X::instances == 2 );
- p2 = std::move( p );
- BOOST_TEST( X::instances == 2 );
- BOOST_TEST( p2.use_count() == 1 );
- BOOST_TEST( p.expired() );
- BOOST_TEST( p2.lock() != p_2 );
- boost::shared_ptr<void> p_3( new X );
- boost::weak_ptr<void> p3( p_3 );
- BOOST_TEST( X::instances == 3 );
- p3 = std::move( p2 );
- BOOST_TEST( X::instances == 3 );
- BOOST_TEST( p3.use_count() == 1 );
- BOOST_TEST( p2.expired() );
- BOOST_TEST( p3.lock() != p_3 );
- }
- return boost::report_errors();
- }
- #else // defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- int main()
- {
- return 0;
- }
- #endif
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