ceph/src/boost/libs/smart_ptr/test/weak_from_this_test.cpp

   1 #include <boost/config.hpp>
   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/detail/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 }