94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2023 Adam Wulkiewicz, Lodz, Poland.
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// Copyright (c) 2014-2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
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#include <boost/core/ignore_unused.hpp>
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#include <boost/range/empty.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/algorithms/validity_failure_type.hpp>
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#include <boost/geometry/algorithms/detail/is_valid/has_invalid_coordinate.hpp>
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#include <boost/geometry/algorithms/dispatch/is_valid.hpp>
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#include <boost/geometry/util/constexpr.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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// A point is always simple
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template <typename Point>
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struct is_valid<Point, point_tag>
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{
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template <typename VisitPolicy, typename Strategy>
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static inline bool apply(Point const& point, VisitPolicy& visitor, Strategy const&)
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{
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boost::ignore_unused(visitor);
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return ! detail::is_valid::has_invalid_coordinate
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<
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Point
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>::apply(point, visitor);
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}
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};
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// A MultiPoint is simple if no two Points in the MultiPoint are equal
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// (have identical coordinate values in X and Y)
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//
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// Reference: OGC 06-103r4 (6.1.5)
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template <typename MultiPoint, bool AllowEmptyMultiGeometries>
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struct is_valid<MultiPoint, multi_point_tag, AllowEmptyMultiGeometries>
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{
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template <typename VisitPolicy, typename Strategy>
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static inline bool apply(MultiPoint const& multipoint,
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VisitPolicy& visitor,
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Strategy const&)
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{
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boost::ignore_unused(multipoint, visitor);
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if BOOST_GEOMETRY_CONSTEXPR (! AllowEmptyMultiGeometries)
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{
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if (boost::empty(multipoint))
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{
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// we do not allow an empty multipoint
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return visitor.template apply<failure_few_points>();
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}
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}
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// if we allow empty multi-geometries, an empty multipoint
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// is considered valid
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return ! detail::is_valid::has_invalid_coordinate
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<
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MultiPoint
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>::apply(multipoint, visitor);
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}
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};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
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