| 1 | // |
|---|---|
| 2 | // weak_from_this_test2.cpp |
| 3 | // |
| 4 | // Tests weak_from_this in a destructor |
| 5 | // |
| 6 | // Copyright (c) 2014, 2015 Peter Dimov |
| 7 | // |
| 8 | // Distributed under the Boost Software License, Version 1.0. |
| 9 | // |
| 10 | // See accompanying file LICENSE_1_0.txt or copy at |
| 11 | // http://www.boost.org/LICENSE_1_0.txt |
| 12 | // |
| 13 | |
| 14 | #include <boost/smart_ptr/enable_shared_from_this.hpp> |
| 15 | #include <boost/weak_ptr.hpp> |
| 16 | #include <boost/core/lightweight_test.hpp> |
| 17 | |
| 18 | class X: public boost::enable_shared_from_this< X > |
| 19 | { |
| 20 | private: |
| 21 | |
| 22 | boost::weak_ptr<X> px_; |
| 23 | |
| 24 | public: |
| 25 | |
| 26 | X() |
| 27 | { |
| 28 | boost::weak_ptr<X> p1 = weak_from_this(); |
| 29 | BOOST_TEST( p1._empty() ); |
| 30 | BOOST_TEST( p1.expired() ); |
| 31 | } |
| 32 | |
| 33 | void check() |
| 34 | { |
| 35 | boost::weak_ptr<X> p2 = weak_from_this(); |
| 36 | BOOST_TEST( !p2.expired() ); |
| 37 | |
| 38 | BOOST_TEST( p2.lock().get() == this ); |
| 39 | |
| 40 | px_ = p2; |
| 41 | } |
| 42 | |
| 43 | ~X() |
| 44 | { |
| 45 | boost::weak_ptr<X> p3 = weak_from_this(); |
| 46 | BOOST_TEST( p3.expired() ); |
| 47 | |
| 48 | BOOST_TEST( !(px_ < p3) && !(p3 < px_) ); |
| 49 | } |
| 50 | }; |
| 51 | |
| 52 | int main() |
| 53 | { |
| 54 | { |
| 55 | boost::shared_ptr< X > px( new X ); |
| 56 | px->check(); |
| 57 | } |
| 58 | |
| 59 | return boost::report_errors(); |
| 60 | } |
| 61 |