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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
#include <boost/mpl/assert.hpp>
#include <boost/concept/requires.hpp>
#include <boost/range.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/geometry/core/tag.hpp>
#include <boost/geometry/core/tag_cast.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/util/add_const_if_c.hpp>
#include <boost/geometry/views/box_view.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace for_each
{
template <typename Range, typename Actor>
struct fe_range_range
{
static inline void apply(Range & range, Actor & actor)
{
actor.apply(range);
}
};
template <typename Polygon, typename Actor>
struct fe_range_polygon
{
static inline void apply(Polygon & polygon, Actor & actor)
{
actor.apply(exterior_ring(polygon));
// TODO: If some flag says true, also do the inner rings.
// for convex hull, it's not necessary
}
};
template <typename Box, typename Actor>
struct fe_range_box
{
static inline void apply(Box & box, Actor & actor)
{
actor.apply(box_view<typename boost::remove_const<Box>::type>(box));
}
};
template <typename Multi, typename Actor, typename SinglePolicy>
struct fe_range_multi
{
static inline void apply(Multi & multi, Actor & actor)
{
for ( typename boost::range_iterator<Multi>::type
it = boost::begin(multi); it != boost::end(multi); ++it)
{
SinglePolicy::apply(*it, actor);
}
}
};
}} // namespace detail::for_each
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template
<
typename Geometry,
typename Actor,
typename Tag = typename tag<Geometry>::type
>
struct for_each_range
{
BOOST_MPL_ASSERT_MSG
(
false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
, (types<Geometry>)
);
};
template <typename Linestring, typename Actor>
struct for_each_range<Linestring, Actor, linestring_tag>
: detail::for_each::fe_range_range<Linestring, Actor>
{};
template <typename Ring, typename Actor>
struct for_each_range<Ring, Actor, ring_tag>
: detail::for_each::fe_range_range<Ring, Actor>
{};
template <typename Polygon, typename Actor>
struct for_each_range<Polygon, Actor, polygon_tag>
: detail::for_each::fe_range_polygon<Polygon, Actor>
{};
template <typename Box, typename Actor>
struct for_each_range<Box, Actor, box_tag>
: detail::for_each::fe_range_box<Box, Actor>
{};
template <typename MultiPoint, typename Actor>
struct for_each_range<MultiPoint, Actor, multi_point_tag>
: detail::for_each::fe_range_range<MultiPoint, Actor>
{};
template <typename Geometry, typename Actor>
struct for_each_range<Geometry, Actor, multi_linestring_tag>
: detail::for_each::fe_range_multi
<
Geometry,
Actor,
detail::for_each::fe_range_range
<
typename add_const_if_c
<
boost::is_const<Geometry>::value,
typename boost::range_value<Geometry>::type
>::type,
Actor
>
>
{};
template <typename Geometry, typename Actor>
struct for_each_range<Geometry, Actor, multi_polygon_tag>
: detail::for_each::fe_range_multi
<
Geometry,
Actor,
detail::for_each::fe_range_polygon
<
typename add_const_if_c
<
boost::is_const<Geometry>::value,
typename boost::range_value<Geometry>::type
>::type,
Actor
>
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
namespace detail
{
template <typename Geometry, typename Actor>
inline void for_each_range(Geometry const& geometry, Actor & actor)
{
dispatch::for_each_range
<
Geometry const,
Actor
>::apply(geometry, actor);
}
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
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