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1 | |
2 | // Copyright 2005-2010 Daniel James. | |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | #if !defined(BOOST_UNORDERED_TEST_HELPERS_INPUT_ITERATOR_HEADER) | |
7 | #define BOOST_UNORDERED_TEST_HELPERS_INPUT_ITERATOR_HEADER | |
8 | ||
9 | #include <boost/config.hpp> | |
10 | #include <boost/iterator/iterator_traits.hpp> | |
11 | #include <iterator> | |
12 | ||
13 | namespace test | |
14 | { | |
15 | template <class Iterator> | |
16 | struct proxy | |
17 | { | |
18 | typedef BOOST_DEDUCED_TYPENAME Iterator::value_type value_type; | |
19 | ||
20 | explicit proxy(value_type const& v) : v_(v) {} | |
21 | proxy(proxy const& x) : v_(x.v_) {} | |
22 | operator value_type const&() const { return v_; } | |
23 | ||
24 | value_type v_; | |
25 | private: | |
26 | proxy& operator=(proxy const&); | |
27 | }; | |
28 | ||
29 | template <class Iterator> | |
30 | struct input_iterator_adaptor | |
31 | : public std::iterator< | |
32 | std::input_iterator_tag, | |
33 | BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type, | |
34 | std::ptrdiff_t, | |
35 | BOOST_DEDUCED_TYPENAME boost::iterator_pointer<Iterator>::type, | |
36 | proxy<Iterator> | |
37 | > | |
38 | { | |
39 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type | |
40 | value_type; | |
41 | ||
42 | input_iterator_adaptor() | |
43 | : base_() {} | |
44 | explicit input_iterator_adaptor(Iterator& it) | |
45 | : base_(&it) {} | |
46 | proxy<Iterator> operator*() const { | |
47 | return proxy<Iterator>(**base_); | |
48 | } | |
49 | value_type* operator->() const { | |
50 | return &**base_; | |
51 | } | |
52 | input_iterator_adaptor& operator++() { | |
53 | ++*base_; return *this; | |
54 | } | |
55 | //input_iterator_adaptor operator++(int) { | |
56 | //} | |
57 | bool operator==(input_iterator_adaptor const& x) const { | |
58 | return *base_ == *x.base_; | |
59 | } | |
60 | bool operator!=(input_iterator_adaptor const& x) const { | |
61 | return *base_ != *x.base_; | |
62 | } | |
63 | private: | |
64 | Iterator* base_; | |
65 | }; | |
66 | ||
67 | template <class Iterator> | |
68 | input_iterator_adaptor<Iterator> input_iterator(Iterator& it) | |
69 | { | |
70 | return input_iterator_adaptor<Iterator>(it); | |
71 | } | |
72 | ||
73 | template <class Iterator> | |
74 | struct copy_iterator_adaptor | |
75 | : public std::iterator< | |
76 | BOOST_DEDUCED_TYPENAME boost::iterator_category<Iterator>::type, | |
77 | BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type, | |
78 | BOOST_DEDUCED_TYPENAME boost::iterator_difference<Iterator>::type, | |
79 | BOOST_DEDUCED_TYPENAME boost::iterator_pointer<Iterator>::type, | |
80 | proxy<Iterator> | |
81 | > | |
82 | { | |
83 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type | |
84 | value_type; | |
85 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_difference<Iterator>::type | |
86 | difference_type; | |
87 | ||
88 | copy_iterator_adaptor() | |
89 | : base_() {} | |
90 | explicit copy_iterator_adaptor(Iterator const& it) | |
91 | : base_(it) {} | |
92 | value_type operator*() const { | |
93 | return *base_; | |
94 | } | |
95 | value_type* operator->() const { | |
96 | return &*base_; | |
97 | } | |
98 | value_type operator[](difference_type d) { | |
99 | return base_[d]; | |
100 | } | |
101 | copy_iterator_adaptor& operator++() { | |
102 | ++base_; return *this; | |
103 | } | |
104 | copy_iterator_adaptor operator++(int) { | |
105 | copy_iterator_adaptor tmp(*this); ++base_; return tmp; | |
106 | } | |
107 | copy_iterator_adaptor& operator--() { | |
108 | --base_; return *this; | |
109 | } | |
110 | copy_iterator_adaptor operator--(int) { | |
111 | copy_iterator_adaptor tmp(*this); --base_; return tmp; | |
112 | } | |
113 | copy_iterator_adaptor operator+=(difference_type x) { | |
114 | base_ += x; | |
115 | return *this; | |
116 | } | |
117 | copy_iterator_adaptor operator-=(difference_type x) { | |
118 | base_ -= x; | |
119 | return *this; | |
120 | } | |
121 | copy_iterator_adaptor operator+(difference_type n) { | |
122 | return copy_iterator_adaptor(base_+n); | |
123 | } | |
124 | copy_iterator_adaptor operator-(difference_type n) { | |
125 | return copy_iterator_adaptor(base_-n); | |
126 | } | |
127 | friend copy_iterator_adaptor operator+( | |
128 | difference_type n, copy_iterator_adaptor x) { | |
129 | return x+n; | |
130 | } | |
131 | difference_type operator-(copy_iterator_adaptor const& other) { | |
132 | return base_-other.base_; | |
133 | } | |
134 | bool operator==(copy_iterator_adaptor const& x) const { | |
135 | return base_ == x.base_; | |
136 | } | |
137 | bool operator!=(copy_iterator_adaptor const& x) const { | |
138 | return base_ != x.base_; | |
139 | } | |
140 | bool operator<(copy_iterator_adaptor const& x) const { | |
141 | return base_ < x.base_; | |
142 | } | |
143 | bool operator>(copy_iterator_adaptor const& x) const { | |
144 | return base_ > x.base_; | |
145 | } | |
146 | bool operator<=(copy_iterator_adaptor const& x) const { | |
147 | return base_ <= x.base_; | |
148 | } | |
149 | bool operator>=(copy_iterator_adaptor const& x) const { | |
150 | return base_ >= x.base_; | |
151 | } | |
152 | private: | |
153 | Iterator base_; | |
154 | }; | |
155 | ||
156 | template <class Iterator> | |
157 | copy_iterator_adaptor<Iterator> copy_iterator(Iterator const& it) | |
158 | { | |
159 | return copy_iterator_adaptor<Iterator>(it); | |
160 | } | |
161 | ||
162 | } | |
163 | ||
164 | #endif | |
165 |