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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014, 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 BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
#define BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
#include <iterator>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/geometry/iterators/point_iterator.hpp>
namespace boost { namespace geometry
{
// MK:: need to add doc here
template <typename Geometry>
class point_reverse_iterator
: public std::reverse_iterator<point_iterator<Geometry> >
{
private:
typedef std::reverse_iterator<point_iterator<Geometry> > base;
inline base* base_ptr()
{
return this;
}
inline base const* base_ptr() const
{
return this;
}
template <typename OtherGeometry> friend class point_reverse_iterator;
template <typename G>
friend inline point_reverse_iterator<G> points_rbegin(G&);
template <typename G>
friend inline point_reverse_iterator<G> points_rend(G&);
inline point_reverse_iterator(base const& base_it) : base(base_it) {}
public:
inline point_reverse_iterator() {}
template <typename OtherGeometry>
inline
point_reverse_iterator(point_reverse_iterator<OtherGeometry> const& other)
: base(*other.base_ptr())
{
static const bool is_conv = boost::is_convertible
<
std::reverse_iterator<point_iterator<Geometry> >,
std::reverse_iterator<point_iterator<OtherGeometry> >
>::value;
BOOST_MPL_ASSERT_MSG((is_conv),
NOT_CONVERTIBLE,
(point_reverse_iterator<OtherGeometry>));
}
};
// MK:: need to add doc here
template <typename Geometry>
inline point_reverse_iterator<Geometry>
points_rbegin(Geometry& geometry)
{
return std::reverse_iterator
<
point_iterator<Geometry>
>(points_end(geometry));
}
// MK:: need to add doc here
template <typename Geometry>
inline point_reverse_iterator<Geometry>
points_rend(Geometry& geometry)
{
return std::reverse_iterator
<
point_iterator<Geometry>
>(points_begin(geometry));
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ITERATORS_POINT_REVERSE_ITERATOR_HPP
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