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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/core/lightweight_test.hpp>
#include <utility>
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();
}
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