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
62