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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 | template <class Iterator> struct proxy | |
15 | { | |
16 | typedef BOOST_DEDUCED_TYPENAME Iterator::value_type value_type; | |
17 | ||
18 | explicit proxy(value_type const& v) : v_(v) {} | |
19 | proxy(proxy const& x) : v_(x.v_) {} | |
20 | operator value_type const&() const { return v_; } | |
21 | ||
22 | value_type v_; | |
23 | ||
24 | private: | |
25 | proxy& operator=(proxy const&); | |
26 | }; | |
27 | ||
28 | template <class Iterator> | |
29 | struct input_iterator_adaptor | |
30 | : public std::iterator<std::input_iterator_tag, | |
31 | BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type, | |
32 | std::ptrdiff_t, | |
33 | BOOST_DEDUCED_TYPENAME boost::iterator_pointer<Iterator>::type, | |
34 | proxy<Iterator> > | |
35 | { | |
36 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type | |
37 | value_type; | |
38 | ||
39 | input_iterator_adaptor() : base_() {} | |
40 | explicit input_iterator_adaptor(Iterator& it) : base_(&it) {} | |
41 | proxy<Iterator> operator*() const { return proxy<Iterator>(**base_); } | |
42 | value_type* operator->() const { return &**base_; } | |
43 | input_iterator_adaptor& operator++() | |
44 | { | |
45 | ++*base_; | |
46 | return *this; | |
47 | } | |
48 | // input_iterator_adaptor operator++(int) { | |
49 | //} | |
50 | bool operator==(input_iterator_adaptor const& x) const | |
51 | { | |
52 | return *base_ == *x.base_; | |
53 | } | |
54 | bool operator!=(input_iterator_adaptor const& x) const | |
55 | { | |
56 | return *base_ != *x.base_; | |
57 | } | |
58 | ||
59 | private: | |
60 | Iterator* base_; | |
61 | }; | |
62 | ||
63 | template <class Iterator> | |
64 | input_iterator_adaptor<Iterator> input_iterator(Iterator& it) | |
65 | { | |
66 | return input_iterator_adaptor<Iterator>(it); | |
67 | } | |
68 | ||
69 | template <class Iterator> | |
70 | struct copy_iterator_adaptor | |
71 | : public std::iterator< | |
72 | BOOST_DEDUCED_TYPENAME boost::iterator_category<Iterator>::type, | |
73 | BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type, | |
74 | BOOST_DEDUCED_TYPENAME boost::iterator_difference<Iterator>::type, | |
75 | BOOST_DEDUCED_TYPENAME boost::iterator_pointer<Iterator>::type, | |
76 | proxy<Iterator> > | |
77 | { | |
78 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_value<Iterator>::type | |
79 | value_type; | |
80 | typedef BOOST_DEDUCED_TYPENAME boost::iterator_difference<Iterator>::type | |
81 | difference_type; | |
82 | ||
83 | copy_iterator_adaptor() : base_() {} | |
84 | explicit copy_iterator_adaptor(Iterator const& it) : base_(it) {} | |
85 | value_type operator*() const { return *base_; } | |
86 | value_type* operator->() const { return &*base_; } | |
87 | value_type operator[](difference_type d) { return base_[d]; } | |
88 | copy_iterator_adaptor& operator++() | |
89 | { | |
90 | ++base_; | |
91 | return *this; | |
92 | } | |
93 | copy_iterator_adaptor operator++(int) | |
94 | { | |
95 | copy_iterator_adaptor tmp(*this); | |
96 | ++base_; | |
97 | return tmp; | |
98 | } | |
99 | copy_iterator_adaptor& operator--() | |
100 | { | |
101 | --base_; | |
102 | return *this; | |
103 | } | |
104 | copy_iterator_adaptor operator--(int) | |
105 | { | |
106 | copy_iterator_adaptor tmp(*this); | |
107 | --base_; | |
108 | return tmp; | |
109 | } | |
110 | copy_iterator_adaptor operator+=(difference_type x) | |
111 | { | |
112 | base_ += x; | |
113 | return *this; | |
114 | } | |
115 | copy_iterator_adaptor operator-=(difference_type x) | |
116 | { | |
117 | base_ -= x; | |
118 | return *this; | |
119 | } | |
120 | copy_iterator_adaptor operator+(difference_type n) | |
121 | { | |
122 | return copy_iterator_adaptor(base_ + n); | |
123 | } | |
124 | copy_iterator_adaptor operator-(difference_type n) | |
125 | { | |
126 | return copy_iterator_adaptor(base_ - n); | |
127 | } | |
128 | friend copy_iterator_adaptor operator+( | |
129 | difference_type n, copy_iterator_adaptor x) | |
130 | { | |
131 | return x + n; | |
132 | } | |
133 | difference_type operator-(copy_iterator_adaptor const& other) | |
134 | { | |
135 | return base_ - other.base_; | |
136 | } | |
137 | bool operator==(copy_iterator_adaptor const& x) const | |
138 | { | |
139 | return base_ == x.base_; | |
140 | } | |
141 | bool operator!=(copy_iterator_adaptor const& x) const | |
142 | { | |
143 | return base_ != x.base_; | |
144 | } | |
145 | bool operator<(copy_iterator_adaptor const& x) const | |
146 | { | |
147 | return base_ < x.base_; | |
148 | } | |
149 | bool operator>(copy_iterator_adaptor const& x) const | |
150 | { | |
151 | return base_ > x.base_; | |
152 | } | |
153 | bool operator<=(copy_iterator_adaptor const& x) const | |
154 | { | |
155 | return base_ <= x.base_; | |
156 | } | |
157 | bool operator>=(copy_iterator_adaptor const& x) const | |
158 | { | |
159 | return base_ >= x.base_; | |
160 | } | |
161 | ||
162 | private: | |
163 | Iterator base_; | |
164 | }; | |
165 | ||
166 | template <class Iterator> | |
167 | copy_iterator_adaptor<Iterator> copy_iterator(Iterator const& it) | |
168 | { | |
169 | return copy_iterator_adaptor<Iterator>(it); | |
170 | } | |
171 | } | |
172 | ||
173 | #endif |