| 1 | |
|---|---|
| 2 | // weak_from_test2.cpp |
| 3 | // |
| 4 | // Tests weak_from in a destructor |
| 5 | // |
| 6 | // Copyright 2014, 2015, 2019 Peter Dimov |
| 7 | // |
| 8 | // Distributed under the Boost Software License, Version 1.0. |
| 9 | // http://www.boost.org/LICENSE_1_0.txt |
| 10 | |
| 11 | #include <boost/smart_ptr/enable_shared_from.hpp> |
| 12 | #include <boost/weak_ptr.hpp> |
| 13 | #include <boost/core/lightweight_test.hpp> |
| 14 | |
| 15 | class X: public boost::enable_shared_from |
| 16 | { |
| 17 | private: |
| 18 | |
| 19 | boost::weak_ptr<X> px_; |
| 20 | |
| 21 | public: |
| 22 | |
| 23 | X() |
| 24 | { |
| 25 | boost::weak_ptr<X> p1 = weak_from( p: this ); |
| 26 | BOOST_TEST( p1._empty() ); |
| 27 | BOOST_TEST( p1.expired() ); |
| 28 | } |
| 29 | |
| 30 | void check() |
| 31 | { |
| 32 | boost::weak_ptr<X> p2 = weak_from( p: this ); |
| 33 | BOOST_TEST( !p2.expired() ); |
| 34 | |
| 35 | BOOST_TEST( p2.lock().get() == this ); |
| 36 | |
| 37 | px_ = p2; |
| 38 | } |
| 39 | |
| 40 | ~X() |
| 41 | { |
| 42 | boost::weak_ptr<X> p3 = weak_from( p: this ); |
| 43 | BOOST_TEST( p3.expired() ); |
| 44 | |
| 45 | BOOST_TEST( !(px_ < p3) && !(p3 < px_) ); |
| 46 | } |
| 47 | }; |
| 48 | |
| 49 | int main() |
| 50 | { |
| 51 | { |
| 52 | boost::shared_ptr< X > px( new X ); |
| 53 | px->check(); |
| 54 | } |
| 55 | |
| 56 | return boost::report_errors(); |
| 57 | } |
| 58 |