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
61