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// shared_from_test.cpp
//
// Copyright 2019 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/smart_ptr/enable_shared_from.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/core/lightweight_test.hpp>
//
class X
{
private:
int m_;
public:
X(): m_() {}
};
class Y: public boost::enable_shared_from
{
};
class Z: public X, public Y
{
public:
boost::shared_ptr<Z> shared_from_this()
{
return boost::shared_from( this );
}
};
void null_deleter( void const* )
{
}
int main()
{
boost::shared_ptr<Z> p( new Z );
try
{
boost::shared_ptr<Z> q = p->shared_from_this();
BOOST_TEST_EQ( p, q );
BOOST_TEST( !( p < q ) && !( q < p ) );
}
catch( boost::bad_weak_ptr const & )
{
BOOST_ERROR( "p->shared_from_this() failed" );
}
Z v2( *p );
try
{
boost::shared_ptr<Z> q = v2.shared_from_this();
BOOST_ERROR( "v2.shared_from_this() failed to throw" );
}
catch( boost::bad_weak_ptr const & )
{
}
*p = Z();
try
{
boost::shared_ptr<Z> q = p->shared_from_this();
BOOST_TEST_EQ( p, q );
BOOST_TEST( !( p < q ) && !( q < p ) );
}
catch( boost::bad_weak_ptr const & )
{
BOOST_ERROR( "p->shared_from_this() threw bad_weak_ptr after *p = Z()" );
}
{
boost::shared_ptr<Z> p2( p.get(), null_deleter );
}
try
{
boost::shared_ptr<Z> q = p->shared_from_this();
BOOST_TEST_EQ( p, q );
BOOST_TEST( !( p < q ) && !( q < p ) );
}
catch( boost::bad_weak_ptr const& )
{
BOOST_ERROR( "p->shared_from_this() failed" );
}
return boost::report_errors();
}
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