geometries/concepts/ring_concept.hpp

0001 // Boost.Geometry (aka GGL, Generic Geometry Library)
0002
0003 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
0004 // Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
0005 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
0006
0007 // This file was modified by Oracle on 2020-2021.
0008 // Modifications copyright (c) 2020-2021 Oracle and/or its affiliates.
0009 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
0010
0011 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
0012 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
0013
0014 // Use, modification and distribution is subject to the Boost Software License,
0015 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0016 // http://www.boost.org/LICENSE_1_0.txt)
0017
0018
0019 #ifndef BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_RING_CONCEPT_HPP
0020 #define BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_RING_CONCEPT_HPP
0021
0022
0023 #include <boost/concept_check.hpp>
0024 #include <boost/range/concepts.hpp>
0025
0026 #include <boost/geometry/core/access.hpp>
0027 #include <boost/geometry/core/mutable_range.hpp>
0028 #include <boost/geometry/core/point_type.hpp>
0029
0030 #include <boost/geometry/geometries/concepts/concept_type.hpp>
0031 #include <boost/geometry/geometries/concepts/point_concept.hpp>
0032
0033
0034 namespace boost { namespace geometry { namespace concepts
0035 {
0036
0037 template <typename Geometry>
0038 class Ring
0039 {
0040 #ifndef DOXYGEN_NO_CONCEPT_MEMBERS
0041     typedef typename point_type<Geometry>::type point_type;
0042
0043     BOOST_CONCEPT_ASSERT( (concepts::Point<point_type>) );
0044     BOOST_CONCEPT_ASSERT( (boost::RandomAccessRangeConcept<Geometry>) );
0045
0046 public :
0047
0048     BOOST_CONCEPT_USAGE(Ring)
0049     {
0050         Geometry* ring = 0;
0051         traits::clear<Geometry>::apply(*ring);
0052         traits::resize<Geometry>::apply(*ring, 0);
0053         point_type* point = 0;
0054         traits::push_back<Geometry>::apply(*ring, *point);
0055     }
0056 #endif
0057 };
0058
0059
0060 /*!
0061 \brief (linear) ring concept (const version)
0062 \ingroup const_concepts
0063 \details The ConstLinearRing concept check the same as the Geometry concept,
0064 but does not check write access.
0065 */
0066 template <typename Geometry>
0067 class ConstRing
0068 {
0069 #ifndef DOXYGEN_NO_CONCEPT_MEMBERS
0070     typedef typename point_type<Geometry>::type point_type;
0071
0072     BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<point_type>) );
0073     BOOST_CONCEPT_ASSERT( (boost::RandomAccessRangeConcept<Geometry>) );
0074
0075
0076 public :
0077
0078     BOOST_CONCEPT_USAGE(ConstRing)
0079     {
0080     }
0081 #endif
0082 };
0083
0084
0085 template <typename Geometry>
0086 struct concept_type<Geometry, ring_tag>
0087 {
0088     using type = Ring<Geometry>;
0089 };
0090
0091 template <typename Geometry>
0092 struct concept_type<Geometry const, ring_tag>
0093 {
0094     using type = ConstRing<Geometry>;
0095 };
0096
0097
0098 }}} // namespace boost::geometry::concepts
0099
0100
0101 #endif // BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_RING_CONCEPT_HPP