// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2014-2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
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#define BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
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#include <iterator>
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#include <type_traits>
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#include <boost/geometry/core/static_assert.hpp>
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#include <boost/geometry/iterators/point_iterator.hpp>
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namespace boost { namespace geometry
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{
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// MK:: need to add doc here
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template <typename Geometry>
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class point_reverse_iterator
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: public std::reverse_iterator<point_iterator<Geometry> >
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{
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private:
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typedef std::reverse_iterator<point_iterator<Geometry> > base_type;
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template <typename OtherGeometry> friend class point_reverse_iterator;
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template <typename G>
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friend inline point_reverse_iterator<G> points_rbegin(G&);
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template <typename G>
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friend inline point_reverse_iterator<G> points_rend(G&);
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inline point_reverse_iterator(base_type const& base_it)
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: base_type(base_it) {}
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public:
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inline point_reverse_iterator() {}
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template <typename OtherGeometry>
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inline
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point_reverse_iterator(point_reverse_iterator<OtherGeometry> const& other)
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: base_type(other.base())
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{
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static const bool is_conv = std::is_convertible
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<
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std::reverse_iterator<point_iterator<Geometry> >,
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std::reverse_iterator<point_iterator<OtherGeometry> >
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>::value;
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BOOST_GEOMETRY_STATIC_ASSERT((is_conv),
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"Other iterator has to be convertible to member iterator.",
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point_reverse_iterator<OtherGeometry>);
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}
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};
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// MK:: need to add doc here
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template <typename Geometry>
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inline point_reverse_iterator<Geometry>
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points_rbegin(Geometry& geometry)
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{
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return std::reverse_iterator
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<
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point_iterator<Geometry>
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>(points_end(geometry));
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}
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// MK:: need to add doc here
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template <typename Geometry>
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inline point_reverse_iterator<Geometry>
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points_rend(Geometry& geometry)
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{
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return std::reverse_iterator
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<
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point_iterator<Geometry>
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>(points_begin(geometry));
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
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