1/*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6==============================================================================*/
7#if !defined(FUSION_ITERATOR_ADAPTER_08112011_0942)
8#define FUSION_ITERATOR_ADAPTER_08112011_0942
9
10#include <boost/fusion/support/config.hpp>
11#include <boost/fusion/support/category_of.hpp>
12#include <boost/fusion/iterator/advance.hpp>
13#include <boost/fusion/iterator/deref.hpp>
14#include <boost/fusion/iterator/distance.hpp>
15#include <boost/fusion/iterator/equal_to.hpp>
16#include <boost/fusion/iterator/iterator_facade.hpp>
17#include <boost/fusion/iterator/next.hpp>
18#include <boost/fusion/iterator/prior.hpp>
19#include <boost/fusion/iterator/value_of.hpp>
20#include <boost/type_traits/remove_const.hpp>
21
22namespace boost { namespace fusion
23{
24 template <typename Derived_, typename Iterator_,
25 typename Category = typename traits::category_of<Iterator_>::type>
26 struct iterator_adapter
27 : iterator_facade<Derived_, Category>
28 {
29 typedef typename
30 remove_const<Iterator_>::type
31 iterator_base_type;
32 iterator_base_type iterator_base;
33
34 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
35 iterator_adapter(iterator_base_type const& iterator_base_)
36 : iterator_base(iterator_base_) {}
37
38 // default implementation
39 template <typename I1, typename I2>
40 struct equal_to
41 : result_of::equal_to<
42 typename I1::iterator_base_type
43 , typename I2::iterator_base_type
44 >
45 {};
46
47 // default implementation
48 template <typename Iterator, typename N>
49 struct advance
50 {
51 typedef typename Derived_::template make<
52 typename result_of::advance<
53 typename Iterator::iterator_base_type, N
54 >::type>::type
55 type;
56
57 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
58 static type
59 call(Iterator const& it)
60 {
61 return type(fusion::advance<N>(it.iterator_base));
62 }
63 };
64
65 // default implementation
66 template <typename First, typename Last>
67 struct distance
68 : result_of::distance<
69 typename First::iterator_base_type
70 , typename Last::iterator_base_type
71 >
72 {};
73
74 // default implementation
75 template <typename Iterator>
76 struct value_of
77 : result_of::value_of<
78 typename Iterator::iterator_base_type
79 >
80 {};
81
82 // default implementation
83 template <typename Iterator>
84 struct deref
85 {
86 typedef typename
87 result_of::deref<
88 typename Iterator::iterator_base_type
89 >::type
90 type;
91
92 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
93 static type
94 call(Iterator const& it)
95 {
96 return fusion::deref(it.iterator_base);
97 }
98 };
99
100 // default implementation
101 template <typename Iterator>
102 struct next
103 {
104 typedef typename Derived_::template make<
105 typename result_of::next<
106 typename Iterator::iterator_base_type
107 >::type>::type
108 type;
109
110 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
111 static type
112 call(Iterator const& i)
113 {
114 return type(fusion::next(i.iterator_base));
115 }
116 };
117
118 // default implementation
119 template <typename Iterator>
120 struct prior
121 {
122 typedef typename Derived_::template make<
123 typename result_of::prior<
124 typename Iterator::iterator_base_type
125 >::type>::type
126 type;
127
128 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
129 static type
130 call(Iterator const& i)
131 {
132 return type(fusion::prior(i.iterator_base));
133 }
134 };
135 };
136}}
137
138#ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
139namespace std
140{
141 template <typename Derived, typename Iterator, typename Category>
142 struct iterator_traits< ::boost::fusion::iterator_adapter<Derived, Iterator, Category> >
143 { };
144}
145#endif
146
147#endif
148

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source code of include/boost/fusion/iterator/iterator_adapter.hpp