ceph/src/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/workaround.hpp>
   9
  10 #include <iterator>
  11
  12 namespace boost {
  13 namespace iterators {
  14
  15 // Macro for supporting old compilers, no longer needed but kept
  16 // for backwards compatibility (it was documented).
  17 #define BOOST_ITERATOR_CATEGORY iterator_category
  18
  19
  20 template <class Iterator>
  21 struct iterator_value
  22 {
  23     typedef typename std::iterator_traits<Iterator>::value_type type;
  24 };
  25
  26 template <class Iterator>
  27 struct iterator_reference
  28 {
  29     typedef typename std::iterator_traits<Iterator>::reference type;
  30 };
  31
  32
  33 template <class Iterator>
  34 struct iterator_pointer
  35 {
  36     typedef typename std::iterator_traits<Iterator>::pointer type;
  37 };
  38
  39 template <class Iterator>
  40 struct iterator_difference
  41 {
  42     typedef typename std::iterator_traits<Iterator>::difference_type type;
  43 };
  44
  45 template <class Iterator>
  46 struct iterator_category
  47 {
  48     typedef typename std::iterator_traits<Iterator>::iterator_category type;
  49 };
  50
  51 } // namespace iterators
  52
  53 using iterators::iterator_value;
  54 using iterators::iterator_reference;
  55 using iterators::iterator_pointer;
  56 using iterators::iterator_difference;
  57 using iterators::iterator_category;
  58
  59 } // namespace boost
  60
  61 #endif // ITERATOR_TRAITS_DWA200347_HPP