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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) | |
2 | ||
3 | // Copyright (c) 2014-2020, Oracle and/or its affiliates. | |
4 | // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle | |
5 | // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle | |
6 | ||
7 | // Licensed under the Boost Software License version 1.0. | |
8 | // http://www.boost.org/users/license.html | |
9 | ||
10 | #ifndef BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP | |
11 | #define BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP | |
12 | ||
13 | #include <iterator> | |
14 | #include <type_traits> | |
15 | ||
16 | #include <boost/geometry/core/static_assert.hpp> | |
17 | #include <boost/geometry/iterators/point_iterator.hpp> | |
18 | ||
19 | namespace boost { namespace geometry | |
20 | { | |
21 | ||
22 | ||
23 | // MK:: need to add doc here | |
24 | template <typename Geometry> | |
25 | class point_reverse_iterator | |
26 | : public std::reverse_iterator<point_iterator<Geometry> > | |
27 | { | |
28 | private: | |
29 | typedef std::reverse_iterator<point_iterator<Geometry> > base_type; | |
30 | ||
31 | template <typename OtherGeometry> friend class point_reverse_iterator; | |
32 | template <typename G> | |
33 | friend inline point_reverse_iterator<G> points_rbegin(G&); | |
34 | ||
35 | template <typename G> | |
36 | friend inline point_reverse_iterator<G> points_rend(G&); | |
37 | ||
38 | inline point_reverse_iterator(base_type const& base_it) | |
39 | : base_type(base_it) {} | |
40 | ||
41 | public: | |
42 | inline point_reverse_iterator() {} | |
43 | ||
44 | template <typename OtherGeometry> | |
45 | inline | |
46 | point_reverse_iterator(point_reverse_iterator<OtherGeometry> const& other) | |
47 | : base_type(other.base()) | |
48 | { | |
49 | static const bool is_conv = std::is_convertible | |
50 | < | |
51 | std::reverse_iterator<point_iterator<Geometry> >, | |
52 | std::reverse_iterator<point_iterator<OtherGeometry> > | |
53 | >::value; | |
54 | ||
55 | BOOST_GEOMETRY_STATIC_ASSERT((is_conv), | |
56 | "Other iterator has to be convertible to member iterator.", | |
57 | point_reverse_iterator<OtherGeometry>); | |
58 | } | |
59 | }; | |
60 | ||
61 | ||
62 | // MK:: need to add doc here | |
63 | template <typename Geometry> | |
64 | inline point_reverse_iterator<Geometry> | |
65 | points_rbegin(Geometry& geometry) | |
66 | { | |
67 | return std::reverse_iterator | |
68 | < | |
69 | point_iterator<Geometry> | |
70 | >(points_end(geometry)); | |
71 | } | |
72 | ||
73 | ||
74 | // MK:: need to add doc here | |
75 | template <typename Geometry> | |
76 | inline point_reverse_iterator<Geometry> | |
77 | points_rend(Geometry& geometry) | |
78 | { | |
79 | return std::reverse_iterator | |
80 | < | |
81 | point_iterator<Geometry> | |
82 | >(points_begin(geometry)); | |
83 | } | |
84 | ||
85 | ||
86 | }} // namespace boost::geometry | |
87 | ||
88 | #endif // BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP |