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//
// shared_from_this_test.cpp
//
// Copyright (c) 2002, 2003 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)
//
#if defined(__GNUC__) && __GNUC__ > 4
# pragma GCC diagnostic ignored "-Wdelete-non-virtual-dtor"
#endif
#include <boost/enable_shared_from_this.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/config.hpp>
#include <boost/core/lightweight_test.hpp>
//
class X
{
public:
virtual void f() = 0;
protected:
~X() {}
};
class Y
{
public:
virtual boost::shared_ptr<X> getX() = 0;
protected:
~Y() {}
};
boost::shared_ptr<Y> createY();
void test()
{
boost::shared_ptr<Y> py = createY();
BOOST_TEST(py.get() != 0);
BOOST_TEST(py.use_count() == 1);
try
{
boost::shared_ptr<X> px = py->getX();
BOOST_TEST(px.get() != 0);
BOOST_TEST(py.use_count() == 2);
px->f();
#if !defined( BOOST_NO_RTTI )
boost::shared_ptr<Y> py2 = boost::dynamic_pointer_cast<Y>(px);
BOOST_TEST(py.get() == py2.get());
BOOST_TEST(!(py < py2 || py2 < py));
BOOST_TEST(py.use_count() == 3);
#endif
}
catch( boost::bad_weak_ptr const& )
{
BOOST_ERROR( "py->getX() failed" );
}
}
void test2();
void test3();
int main()
{
test();
test2();
test3();
return boost::report_errors();
}
// virtual inheritance to stress the implementation
// (prevents Y* -> impl*, enable_shared_from_this<impl>* -> impl* casts)
class impl: public X, public virtual Y, public virtual boost::enable_shared_from_this<impl>
{
public:
virtual void f()
{
}
virtual boost::shared_ptr<X> getX()
{
boost::shared_ptr<impl> pi = shared_from_this();
BOOST_TEST(pi.get() == this);
return pi;
}
};
// intermediate impl2 to stress the implementation
class impl2: public impl
{
};
boost::shared_ptr<Y> createY()
{
boost::shared_ptr<Y> pi(new impl2);
return pi;
}
void test2()
{
boost::shared_ptr<Y> pi(static_cast<impl2*>(0));
}
//
struct V: public boost::enable_shared_from_this<V>
{
};
void test3()
{
boost::shared_ptr<V> p(new V);
try
{
boost::shared_ptr<V> q = p->shared_from_this();
BOOST_TEST(p == q);
BOOST_TEST(!(p < q) && !(q < p));
}
catch( boost::bad_weak_ptr const & )
{
BOOST_ERROR( "p->shared_from_this() failed" );
}
V v2(*p);
try
{
boost::shared_ptr<V> r = v2.shared_from_this();
BOOST_ERROR("v2.shared_from_this() failed to throw");
}
catch( boost::bad_weak_ptr const & )
{
}
try
{
*p = V();
boost::shared_ptr<V> r = p->shared_from_this();
BOOST_TEST(p == r);
BOOST_TEST(!(p < r) && !(r < p));
}
catch( boost::bad_weak_ptr const & )
{
BOOST_ERROR("p->shared_from_this() threw bad_weak_ptr after *p = V()");
}
}
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