3rdparty/boost/boost/iterator/iterator_traits.hpp

   1 // Copyright David Abrahams 2003.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef ITERATOR_TRAITS_DWA200347_HPP
   6 # define ITERATOR_TRAITS_DWA200347_HPP
   7
   8 # include <boost/detail/iterator.hpp>
   9 # include <boost/detail/workaround.hpp>
  10
  11 namespace boost {
  12 namespace iterators {
  13
  14 // Macro for supporting old compilers, no longer needed but kept
  15 // for backwards compatibility (it was documented).
  16 #define BOOST_ITERATOR_CATEGORY iterator_category
  17
  18
  19 template <class Iterator>
  20 struct iterator_value
  21 {
  22     typedef typename boost::detail::iterator_traits<Iterator>::value_type type;
  23 };
  24
  25 template <class Iterator>
  26 struct iterator_reference
  27 {
  28     typedef typename boost::detail::iterator_traits<Iterator>::reference type;
  29 };
  30
  31
  32 template <class Iterator>
  33 struct iterator_pointer
  34 {
  35     typedef typename boost::detail::iterator_traits<Iterator>::pointer type;
  36 };
  37
  38 template <class Iterator>
  39 struct iterator_difference
  40 {
  41     typedef typename boost::detail::iterator_traits<Iterator>::difference_type type;
  42 };
  43
  44 template <class Iterator>
  45 struct iterator_category
  46 {
  47     typedef typename boost::detail::iterator_traits<Iterator>::iterator_category type;
  48 };
  49
  50 } // namespace iterators
  51
  52 using iterators::iterator_value;
  53 using iterators::iterator_reference;
  54 using iterators::iterator_pointer;
  55 using iterators::iterator_difference;
  56 using iterators::iterator_category;
  57
  58 } // namespace boost
  59
  60 #endif // ITERATOR_TRAITS_DWA200347_HPP