| |
| // 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(); |
| } |