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

   1 //
   2 //  shared_ptr_move_test.cpp
   3 //
   4 //  Copyright (c) 2007 Peter Dimov
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 // See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt
   9 //
  10
  11 #include <boost/shared_ptr.hpp>
  12 #include <boost/detail/lightweight_test.hpp>
  13 #include <utility>
  14
  15 #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
  16
  17 struct X
  18 {
  19     static long instances;
  20
  21     X()
  22     {
  23         ++instances;
  24     }
  25
  26     ~X()
  27     {
  28         --instances;
  29     }
  30
  31 private:
  32
  33     X( X const & );
  34     X & operator=( X const & );
  35 };
  36
  37 long X::instances = 0;
  38
  39 int main()
  40 {
  41     BOOST_TEST( X::instances == 0 );
  42
  43     {
  44         boost::shared_ptr<X> p( new X );
  45         BOOST_TEST( X::instances == 1 );
  46
  47         boost::shared_ptr<X> p2( std::move( p ) );
  48         BOOST_TEST( X::instances == 1 );
  49         BOOST_TEST( p.get() == 0 );
  50
  51         boost::shared_ptr<void> p3( std::move( p2 ) );
  52         BOOST_TEST( X::instances == 1 );
  53         BOOST_TEST( p2.get() == 0 );
  54
  55         p3.reset();
  56         BOOST_TEST( X::instances == 0 );
  57     }
  58
  59     {
  60         boost::shared_ptr<X> p( new X );
  61         BOOST_TEST( X::instances == 1 );
  62
  63         boost::shared_ptr<X> p2;
  64         p2 = std::move( p );
  65         BOOST_TEST( X::instances == 1 );
  66         BOOST_TEST( p.get() == 0 );
  67
  68         boost::shared_ptr<void> p3;
  69         p3 = std::move( p2 );
  70         BOOST_TEST( X::instances == 1 );
  71         BOOST_TEST( p2.get() == 0 );
  72
  73         p3.reset();
  74         BOOST_TEST( X::instances == 0 );
  75     }
  76
  77     {
  78         boost::shared_ptr<X> p( new X );
  79         BOOST_TEST( X::instances == 1 );
  80
  81         boost::shared_ptr<X> p2( new X );
  82         BOOST_TEST( X::instances == 2 );
  83         p2 = std::move( p );
  84         BOOST_TEST( X::instances == 1 );
  85         BOOST_TEST( p.get() == 0 );
  86
  87         boost::shared_ptr<void> p3( new X );
  88         BOOST_TEST( X::instances == 2 );
  89         p3 = std::move( p2 );
  90         BOOST_TEST( X::instances == 1 );
  91         BOOST_TEST( p2.get() == 0 );
  92
  93         p3.reset();
  94         BOOST_TEST( X::instances == 0 );
  95     }
  96
  97     return boost::report_errors();
  98 }
  99
 100 #else // defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
 101
 102 int main()
 103 {
 104     return 0;
 105 }
 106
 107 #endif