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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.
// Modifications copyright (c) 2020, Oracle and/or its affiliates.
// 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 <cstddef>
#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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