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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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