ceph/src/boost/libs/intrusive/test/null_iterator_test.cpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2014-2014. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/container for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #include <boost/intrusive/list.hpp>
  12 #include <boost/intrusive/slist.hpp>
  13 #include <boost/intrusive/bs_set.hpp>
  14 #include <boost/intrusive/set.hpp>
  15 #include <boost/intrusive/avl_set.hpp>
  16 #include <boost/intrusive/sg_set.hpp>
  17 #include <boost/intrusive/treap_set.hpp>
  18 #include <boost/intrusive/splay_set.hpp>
  19 #include <boost/intrusive/detail/mpl.hpp>
  20
  21 #include <boost/core/lightweight_test.hpp>
  22 #include <boost/aligned_storage.hpp>
  23 #include <boost/static_assert.hpp>
  24 #include <cstring>
  25 #include <new>
  26
  27 using namespace boost::intrusive;
  28
  29 struct Type
  30    : list_base_hook<>
  31    , slist_base_hook<>
  32    , set_base_hook<>
  33    , avl_set_base_hook<>
  34    , bs_set_base_hook<>
  35 {};
  36
  37 typedef boost::aligned_storage<sizeof(void*)*4>::type buffer_t;
  38
  39 static buffer_t buffer_0x00;
  40 static buffer_t buffer_0xFF;
  41
  42 template<class Iterator>
  43 const Iterator &on_0x00_buffer()
  44 {
  45    BOOST_STATIC_ASSERT(sizeof(buffer_t) >= sizeof(Iterator));
  46    return * ::new(std::memset(&buffer_0x00, 0x00, sizeof(buffer_0x00))) Iterator();
  47 }
  48
  49 template<class Iterator>
  50 const Iterator &on_0xFF_buffer()
  51 {
  52    BOOST_STATIC_ASSERT(sizeof(buffer_t) >= sizeof(Iterator));
  53    return * ::new(std::memset(&buffer_0xFF, 0xFF, sizeof(buffer_0xFF))) Iterator();
  54 }
  55
  56 BOOST_INTRUSIVE_INSTANTIATE_DEFAULT_TYPE_TMPLT(reverse_iterator)
  57 BOOST_INTRUSIVE_INSTANTIATE_DEFAULT_TYPE_TMPLT(const_reverse_iterator)
  58
  59
  60 template<class Container>
  61 void check_null_iterators()
  62 {
  63    typedef typename Container::iterator               iterator;
  64    typedef typename Container::const_iterator         const_iterator;
  65    typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT
  66       (::, Container
  67       ,reverse_iterator, iterator)                    reverse_iterator;
  68    typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT
  69       (::, Container
  70       ,const_reverse_iterator, const_iterator)        const_reverse_iterator;
  71
  72    BOOST_TEST(on_0xFF_buffer<iterator>()               == on_0x00_buffer<iterator>());
  73    BOOST_TEST(on_0xFF_buffer<const_iterator>()         == on_0x00_buffer<const_iterator>());
  74    BOOST_TEST(on_0xFF_buffer<reverse_iterator>()       == on_0x00_buffer<reverse_iterator>());
  75    BOOST_TEST(on_0xFF_buffer<const_reverse_iterator>() == on_0x00_buffer<const_reverse_iterator>());
  76 }
  77
  78 int main()
  79 {
  80    check_null_iterators< list<Type> >();
  81    check_null_iterators< slist<Type> >();
  82    check_null_iterators< bs_set<Type> >();
  83    check_null_iterators< set<Type> >();
  84    check_null_iterators< multiset<Type> >();
  85    check_null_iterators< avl_set<Type> >();
  86    check_null_iterators< avl_multiset<Type> >();
  87    check_null_iterators< sg_set<Type> >();
  88    check_null_iterators< sg_multiset<Type> >();
  89    check_null_iterators< treap_set<Type> >();
  90    check_null_iterators< treap_multiset<Type> >();
  91    check_null_iterators< splay_set<Type> >();
  92    check_null_iterators< splay_multiset<Type> >();
  93
  94    return boost::report_errors();
  95 }