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

   1 //
   2 //  shared_array nullptr test
   3 //
   4 //  Copyright 2012, 2013 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_array.hpp>
  12 #include <boost/detail/lightweight_test.hpp>
  13 #include <cstddef>
  14 #include <memory>
  15
  16 #if !defined( BOOST_NO_CXX11_NULLPTR )
  17
  18 struct X
  19 {
  20     static int instances;
  21
  22     X()
  23     {
  24         ++instances;
  25     }
  26
  27     ~X()
  28     {
  29         --instances;
  30     }
  31
  32 private:
  33
  34     X( X const & );
  35     X & operator=( X const & );
  36 };
  37
  38 int X::instances = 0;
  39
  40 int main()
  41 {
  42     {
  43         boost::shared_array<int> p( nullptr );
  44
  45         BOOST_TEST( p.get() == 0 );
  46         BOOST_TEST( p.use_count() == 0 );
  47
  48         BOOST_TEST( p == nullptr );
  49         BOOST_TEST( nullptr == p );
  50         BOOST_TEST( !( p != nullptr ) );
  51         BOOST_TEST( !( nullptr != p ) );
  52     }
  53
  54     {
  55         boost::shared_array<int> p( new int[ 1 ] );
  56
  57         BOOST_TEST( p.get() != 0 );
  58         BOOST_TEST( p.use_count() == 1 );
  59
  60         BOOST_TEST( p != nullptr );
  61         BOOST_TEST( nullptr != p );
  62         BOOST_TEST( !( p == nullptr ) );
  63         BOOST_TEST( !( nullptr == p ) );
  64
  65         p = nullptr;
  66
  67         BOOST_TEST( p.get() == 0 );
  68         BOOST_TEST( p.use_count() == 0 );
  69
  70         BOOST_TEST( p == nullptr );
  71         BOOST_TEST( nullptr == p );
  72         BOOST_TEST( !( p != nullptr ) );
  73         BOOST_TEST( !( nullptr != p ) );
  74     }
  75
  76     {
  77         BOOST_TEST( X::instances == 0 );
  78
  79         boost::shared_array<X> p( new X[ 2 ] );
  80         BOOST_TEST( X::instances == 2 );
  81
  82         BOOST_TEST( p.get() != 0 );
  83         BOOST_TEST( p.use_count() == 1 );
  84
  85         BOOST_TEST( p != nullptr );
  86         BOOST_TEST( nullptr != p );
  87         BOOST_TEST( !( p == nullptr ) );
  88         BOOST_TEST( !( nullptr == p ) );
  89
  90         p = nullptr;
  91         BOOST_TEST( X::instances == 0 );
  92
  93         BOOST_TEST( p.get() == 0 );
  94         BOOST_TEST( p.use_count() == 0 );
  95
  96         BOOST_TEST( p == nullptr );
  97         BOOST_TEST( nullptr == p );
  98         BOOST_TEST( !( p != nullptr ) );
  99         BOOST_TEST( !( nullptr != p ) );
 100     }
 101
 102     return boost::report_errors();
 103 }
 104
 105 #else
 106
 107 int main()
 108 {
 109     return 0;
 110 }
 111
 112 #endif