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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.
- // This file was modified by Oracle on 2020-2023.
- // Modifications copyright (c) 2020-2023, Oracle and/or its affiliates.
- // Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
- // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
- // 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_CORE_INTERIOR_RINGS_HPP
- #define BOOST_GEOMETRY_CORE_INTERIOR_RINGS_HPP
- #include <type_traits>
- #include <boost/range/value_type.hpp>
- #include <boost/geometry/core/interior_type.hpp>
- #include <boost/geometry/core/static_assert.hpp>
- #include <boost/geometry/core/tag.hpp>
- #include <boost/geometry/core/tags.hpp>
- namespace boost { namespace geometry
- {
- namespace traits
- {
- /*!
- \brief Traits class defining access to interior_rings of a polygon
- \details defines access (const and non const) to interior ring
- \ingroup traits
- \par Geometries:
- - polygon
- \par Specializations should provide:
- - static inline INTERIOR& get(POLY&)
- - static inline const INTERIOR& get(POLY const&)
- \tparam Geometry geometry
- */
- template <typename Geometry>
- struct interior_rings
- {
- BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
- "Not implemented for this Geometry type.",
- Geometry);
- };
- } // namespace traits
- #ifndef DOXYGEN_NO_DISPATCH
- namespace core_dispatch
- {
- template
- <
- typename GeometryTag,
- typename Geometry
- >
- struct interior_rings {};
- template <typename Polygon>
- struct interior_rings<polygon_tag, Polygon>
- {
- static inline
- typename geometry::interior_return_type<Polygon>::type
- apply(Polygon& polygon)
- {
- return traits::interior_rings
- <
- typename std::remove_const<Polygon>::type
- >::get(polygon);
- }
- };
- template <typename MultiPolygon>
- struct interior_type<multi_polygon_tag, MultiPolygon>
- {
- typedef typename core_dispatch::interior_type
- <
- polygon_tag,
- typename boost::range_value<MultiPolygon>::type
- >::type type;
- };
- } // namespace core_dispatch
- #endif
- /*!
- \brief Function to get the interior rings of a polygon (non const version)
- \ingroup interior_rings
- \note OGC compliance: instead of InteriorRingN
- \tparam Polygon polygon type
- \param polygon the polygon to get the interior rings from
- \return the interior rings (possibly a reference)
- */
- template <typename Polygon>
- inline typename interior_return_type<Polygon>::type interior_rings(Polygon& polygon)
- {
- return core_dispatch::interior_rings
- <
- typename tag<Polygon>::type,
- Polygon
- >::apply(polygon);
- }
- /*!
- \brief Function to get the interior rings of a polygon (const version)
- \ingroup interior_rings
- \note OGC compliance: instead of InteriorRingN
- \tparam Polygon polygon type
- \param polygon the polygon to get the interior rings from
- \return the interior rings (possibly a const reference)
- \qbk{distinguish,const version}
- */
- template <typename Polygon>
- inline typename interior_return_type<Polygon const>::type interior_rings(
- Polygon const& polygon)
- {
- return core_dispatch::interior_rings
- <
- typename tag<Polygon>::type,
- Polygon const
- >::apply(polygon);
- }
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_CORE_INTERIOR_RINGS_HPP
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