// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2020.
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// Modifications copyright (c) 2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_CORE_INTERIOR_RINGS_HPP
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#define BOOST_GEOMETRY_CORE_INTERIOR_RINGS_HPP
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#include <cstddef>
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#include <type_traits>
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#include <boost/range/value_type.hpp>
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#include <boost/geometry/core/interior_type.hpp>
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#include <boost/geometry/core/static_assert.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tags.hpp>
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namespace boost { namespace geometry
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{
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namespace traits
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{
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/*!
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\brief Traits class defining access to interior_rings of a polygon
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\details defines access (const and non const) to interior ring
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\ingroup traits
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\par Geometries:
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- polygon
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\par Specializations should provide:
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- static inline INTERIOR& get(POLY&)
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- static inline const INTERIOR& get(POLY const&)
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\tparam Geometry geometry
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*/
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template <typename Geometry>
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struct interior_rings
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{
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BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
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"Not implemented for this Geometry type.",
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Geometry);
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};
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} // namespace traits
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#ifndef DOXYGEN_NO_DISPATCH
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namespace core_dispatch
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{
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template
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<
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typename GeometryTag,
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typename Geometry
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>
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struct interior_rings {};
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template <typename Polygon>
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struct interior_rings<polygon_tag, Polygon>
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{
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static inline
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typename geometry::interior_return_type<Polygon>::type
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apply(Polygon& polygon)
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{
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return traits::interior_rings
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<
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typename std::remove_const<Polygon>::type
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>::get(polygon);
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}
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};
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template <typename MultiPolygon>
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struct interior_type<multi_polygon_tag, MultiPolygon>
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{
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typedef typename core_dispatch::interior_type
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<
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polygon_tag,
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typename boost::range_value<MultiPolygon>::type
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>::type type;
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};
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} // namespace core_dispatch
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#endif
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/*!
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\brief Function to get the interior rings of a polygon (non const version)
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\ingroup interior_rings
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\note OGC compliance: instead of InteriorRingN
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\tparam Polygon polygon type
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\param polygon the polygon to get the interior rings from
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\return the interior rings (possibly a reference)
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*/
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template <typename Polygon>
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inline typename interior_return_type<Polygon>::type interior_rings(Polygon& polygon)
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{
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return core_dispatch::interior_rings
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<
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typename tag<Polygon>::type,
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Polygon
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>::apply(polygon);
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}
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/*!
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\brief Function to get the interior rings of a polygon (const version)
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\ingroup interior_rings
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\note OGC compliance: instead of InteriorRingN
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\tparam Polygon polygon type
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\param polygon the polygon to get the interior rings from
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\return the interior rings (possibly a const reference)
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\qbk{distinguish,const version}
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*/
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template <typename Polygon>
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inline typename interior_return_type<Polygon const>::type interior_rings(
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Polygon const& polygon)
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{
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return core_dispatch::interior_rings
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<
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typename tag<Polygon>::type,
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Polygon const
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>::apply(polygon);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_CORE_INTERIOR_RINGS_HPP
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