1 // Boost.Geometry (aka GGL, Generic Geometry Library)
3 // Copyright (c) 2014, Oracle and/or its affiliates.
5 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
7 // Licensed under the Boost Software License version 1.0.
8 // http://www.boost.org/users/license.html
10 #ifndef BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
11 #define BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
15 #include <boost/mpl/assert.hpp>
16 #include <boost/type_traits/is_convertible.hpp>
18 #include <boost/geometry/iterators/point_iterator.hpp>
20 namespace boost { namespace geometry
24 // MK:: need to add doc here
25 template <typename Geometry>
26 class point_reverse_iterator
27 : public std::reverse_iterator<point_iterator<Geometry> >
30 typedef std::reverse_iterator<point_iterator<Geometry> > base_type;
32 template <typename OtherGeometry> friend class point_reverse_iterator;
34 friend inline point_reverse_iterator<G> points_rbegin(G&);
37 friend inline point_reverse_iterator<G> points_rend(G&);
39 inline point_reverse_iterator(base_type const& base_it)
40 : base_type(base_it) {}
43 inline point_reverse_iterator() {}
45 template <typename OtherGeometry>
47 point_reverse_iterator(point_reverse_iterator<OtherGeometry> const& other)
48 : base_type(other.base())
50 static const bool is_conv = boost::is_convertible
52 std::reverse_iterator<point_iterator<Geometry> >,
53 std::reverse_iterator<point_iterator<OtherGeometry> >
56 BOOST_MPL_ASSERT_MSG((is_conv),
58 (point_reverse_iterator<OtherGeometry>));
63 // MK:: need to add doc here
64 template <typename Geometry>
65 inline point_reverse_iterator<Geometry>
66 points_rbegin(Geometry& geometry)
68 return std::reverse_iterator
70 point_iterator<Geometry>
71 >(points_end(geometry));
75 // MK:: need to add doc here
76 template <typename Geometry>
77 inline point_reverse_iterator<Geometry>
78 points_rend(Geometry& geometry)
80 return std::reverse_iterator
82 point_iterator<Geometry>
83 >(points_begin(geometry));
87 }} // namespace boost::geometry
89 #endif // BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP