3rdparty/boost/boost/move/detail/iterator_traits.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2014-2014.
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // See http://www.boost.org/libs/move for documentation.
   9 //
  10 //////////////////////////////////////////////////////////////////////////////
  11
  12 //! \file
  13
  14 #ifndef BOOST_MOVE_DETAIL_ITERATOR_TRAITS_HPP
  15 #define BOOST_MOVE_DETAIL_ITERATOR_TRAITS_HPP
  16
  17 #ifndef BOOST_CONFIG_HPP
  18 #  include <boost/config.hpp>
  19 #endif
  20 #
  21 #if defined(BOOST_HAS_PRAGMA_ONCE)
  22 #  pragma once
  23 #endif
  24
  25 #include <cstddef>
  26 #include <boost/move/detail/type_traits.hpp>
  27
  28 #include <boost/move/detail/std_ns_begin.hpp>
  29 BOOST_MOVE_STD_NS_BEG
  30
  31 struct input_iterator_tag;
  32 struct forward_iterator_tag;
  33 struct bidirectional_iterator_tag;
  34 struct random_access_iterator_tag;
  35 struct output_iterator_tag;
  36
  37 BOOST_MOVE_STD_NS_END
  38 #include <boost/move/detail/std_ns_end.hpp>
  39
  40 namespace boost{  namespace movelib{
  41
  42 template<class Iterator>
  43 struct iterator_traits
  44 {
  45    typedef typename Iterator::difference_type   difference_type;
  46    typedef typename Iterator::value_type        value_type;
  47    typedef typename Iterator::pointer           pointer;
  48    typedef typename Iterator::reference         reference;
  49    typedef typename Iterator::iterator_category iterator_category;
  50    typedef typename boost::move_detail::make_unsigned<difference_type>::type size_type;
  51 };
  52
  53 template<class T>
  54 struct iterator_traits<T*>
  55 {
  56    typedef std::ptrdiff_t                    difference_type;
  57    typedef T                                 value_type;
  58    typedef T*                                pointer;
  59    typedef T&                                reference;
  60    typedef std::random_access_iterator_tag   iterator_category;
  61    typedef typename boost::move_detail::make_unsigned<difference_type>::type size_type;
  62 };
  63
  64 template<class T>
  65 struct iterator_traits<const T*>
  66 {
  67    typedef std::ptrdiff_t                    difference_type;
  68    typedef T                                 value_type;
  69    typedef const T*                          pointer;
  70    typedef const T&                          reference;
  71    typedef std::random_access_iterator_tag   iterator_category;
  72    typedef typename boost::move_detail::make_unsigned<difference_type>::type size_type;
  73 };
  74
  75 }} //namespace boost {  namespace movelib{
  76
  77 #endif //#ifndef BOOST_MOVE_DETAIL_ITERATOR_TRAITS_HPP