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112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
//
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// weak_ptr_move_test.cpp
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//
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// Copyright (c) 2007 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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#include <boost/weak_ptr.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <utility>
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struct X
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{
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static long instances;
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X()
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{
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++instances;
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}
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~X()
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{
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--instances;
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}
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private:
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X( X const & );
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X & operator=( X const & );
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};
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long X::instances = 0;
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int main()
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{
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BOOST_TEST( X::instances == 0 );
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{
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boost::shared_ptr<X> p_( new X );
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boost::weak_ptr<X> p( p_ );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p.use_count() == 1 );
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boost::weak_ptr<X> p2( std::move( p ) );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p2.use_count() == 1 );
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BOOST_TEST( p.expired() );
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boost::weak_ptr<void> p3( std::move( p2 ) );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p3.use_count() == 1 );
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BOOST_TEST( p2.expired() );
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p_.reset();
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BOOST_TEST( X::instances == 0 );
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BOOST_TEST( p3.expired() );
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}
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{
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boost::shared_ptr<X> p_( new X );
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boost::weak_ptr<X> p( p_ );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p.use_count() == 1 );
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boost::weak_ptr<X> p2;
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p2 = static_cast< boost::weak_ptr<X> && >( p );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p2.use_count() == 1 );
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BOOST_TEST( p.expired() );
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boost::weak_ptr<void> p3;
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p3 = std::move( p2 );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p3.use_count() == 1 );
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BOOST_TEST( p2.expired() );
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p_.reset();
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BOOST_TEST( X::instances == 0 );
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BOOST_TEST( p3.expired() );
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}
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{
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boost::shared_ptr<X> p_( new X );
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boost::weak_ptr<X> p( p_ );
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BOOST_TEST( X::instances == 1 );
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BOOST_TEST( p.use_count() == 1 );
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boost::shared_ptr<X> p_2( new X );
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boost::weak_ptr<X> p2( p_2 );
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BOOST_TEST( X::instances == 2 );
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p2 = std::move( p );
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BOOST_TEST( X::instances == 2 );
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BOOST_TEST( p2.use_count() == 1 );
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BOOST_TEST( p.expired() );
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BOOST_TEST( p2.lock() != p_2 );
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boost::shared_ptr<void> p_3( new X );
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boost::weak_ptr<void> p3( p_3 );
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BOOST_TEST( X::instances == 3 );
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p3 = std::move( p2 );
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BOOST_TEST( X::instances == 3 );
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BOOST_TEST( p3.use_count() == 1 );
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BOOST_TEST( p2.expired() );
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BOOST_TEST( p3.lock() != p_3 );
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}
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return boost::report_errors();
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}
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