1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
// Unit Test
// Copyright (c) 2015, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef GEOMETRY_TEST_TEST_GEOMETRIES_COPY_ON_DEREFERENCE_GEOMETRIES_HPP
#define GEOMETRY_TEST_TEST_GEOMETRIES_COPY_ON_DEREFERENCE_GEOMETRIES_HPP
#include <cstddef>
#include <iterator>
#include <vector>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/geometry/core/tag.hpp>
template <typename RandomAccessIterator>
class copy_on_dereference_iterator
: public boost::iterator_facade
<
copy_on_dereference_iterator<RandomAccessIterator>,
typename std::iterator_traits<RandomAccessIterator>::value_type,
boost::random_access_traversal_tag,
typename std::iterator_traits<RandomAccessIterator>::value_type,
typename std::iterator_traits<RandomAccessIterator>::difference_type
>
{
private:
typedef boost::iterator_facade
<
copy_on_dereference_iterator<RandomAccessIterator>,
typename std::iterator_traits<RandomAccessIterator>::value_type,
boost::random_access_traversal_tag,
typename std::iterator_traits<RandomAccessIterator>::value_type,
typename std::iterator_traits<RandomAccessIterator>::difference_type
> base_type;
public:
typedef typename base_type::reference reference;
typedef typename base_type::difference_type difference_type;
copy_on_dereference_iterator() {}
copy_on_dereference_iterator(RandomAccessIterator it) : m_it(it) {}
template <typename OtherRAI>
copy_on_dereference_iterator
(copy_on_dereference_iterator<OtherRAI> const& other)
: m_it(other.m_it)
{}
private:
friend class boost::iterator_core_access;
template <typename OtherRAI>
friend class copy_on_dereference_iterator;
inline reference dereference() const { return *m_it; }
inline void increment() { ++m_it; }
inline void decrement() { --m_it; }
inline void advance(difference_type n) { m_it += n; }
template <typename OtherRAI>
inline bool equal(copy_on_dereference_iterator<OtherRAI> const& other) const
{
return m_it == other.m_it;
}
template <typename OtherRAI>
inline difference_type
distance_to(copy_on_dereference_iterator<OtherRAI> const& other) const
{
return std::distance(m_it, other.m_it);
}
private:
RandomAccessIterator m_it;
};
template <typename Value>
class range_copy_on_dereference : private std::vector<Value>
{
private:
typedef std::vector<Value> base_type;
public:
typedef typename base_type::size_type size_type;
typedef copy_on_dereference_iterator
<
typename base_type::const_iterator
> const_iterator;
typedef const_iterator iterator;
inline iterator begin()
{
return iterator(base_type::begin());
}
inline iterator end()
{
return iterator(base_type::end());
}
inline const_iterator begin() const
{
return const_iterator(base_type::begin());
}
inline const_iterator end() const
{
return const_iterator(base_type::end());
}
inline void clear()
{
base_type::clear();
}
inline void push_back(Value const& value)
{
base_type::push_back(value);
}
inline void resize(std::size_t n)
{
base_type::resize(n);
}
inline size_type size() const
{
return base_type::size();
}
};
template <typename Point>
struct multipoint_copy_on_dereference : range_copy_on_dereference<Point>
{};
template <typename Point>
struct linestring_copy_on_dereference : range_copy_on_dereference<Point>
{};
namespace boost { namespace geometry
{
namespace traits
{
template <typename Point>
struct tag< multipoint_copy_on_dereference<Point> >
{
typedef multi_point_tag type;
};
template <typename Point>
struct tag< linestring_copy_on_dereference<Point> >
{
typedef linestring_tag type;
};
} // namespace traits
}} // namespace boost::geometry
#endif // GEOMETRY_TEST_TEST_GEOMETRIES_COPY_ON_DEREFERENCE_GEOMETRIES_HPP
|
