1 | #include <boost/config.hpp> |
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2 | |
3 | // |
4 | // weak_from_this_test.cpp |
5 | // |
6 | // Copyright (c) 2002, 2003, 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 | |
15 | #include <boost/enable_shared_from_this.hpp> |
16 | #include <boost/shared_ptr.hpp> |
17 | #include <boost/weak_ptr.hpp> |
18 | #include <boost/core/lightweight_test.hpp> |
19 | |
20 | class V: public boost::enable_shared_from_this<V> |
21 | { |
22 | }; |
23 | |
24 | void test() |
25 | { |
26 | boost::shared_ptr<V> p( new V ); |
27 | |
28 | boost::weak_ptr<V> q = p; |
29 | BOOST_TEST( !q.expired() ); |
30 | |
31 | boost::weak_ptr<V> q2 = p->weak_from_this(); |
32 | BOOST_TEST( !q2.expired() ); |
33 | BOOST_TEST( !(q < q2) && !(q2 < q) ); |
34 | |
35 | V v2( *p ); |
36 | |
37 | boost::weak_ptr<V> q3 = v2.weak_from_this(); |
38 | BOOST_TEST( q3.expired() ); |
39 | |
40 | *p = V(); |
41 | |
42 | boost::weak_ptr<V> q4 = p->weak_from_this(); |
43 | BOOST_TEST( !q4.expired() ); |
44 | BOOST_TEST( !(q < q4) && !(q4 < q) ); |
45 | BOOST_TEST( !(q2 < q4) && !(q4 < q2) ); |
46 | } |
47 | |
48 | int main() |
49 | { |
50 | test(); |
51 | return boost::report_errors(); |
52 | } |
53 |