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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014-2015, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
#include <boost/core/ignore_unused.hpp>
#include <boost/range.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/algorithms/validity_failure_type.hpp>
#include <boost/geometry/algorithms/detail/is_valid/has_invalid_coordinate.hpp>
#include <boost/geometry/algorithms/dispatch/is_valid.hpp>
#include <boost/geometry/util/condition.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
// A point is always simple
template <typename Point>
struct is_valid<Point, point_tag>
{
template <typename VisitPolicy>
static inline bool apply(Point const& point, VisitPolicy& visitor)
{
boost::ignore_unused(visitor);
return ! detail::is_valid::has_invalid_coordinate
<
Point
>::apply(point, visitor);
}
};
// A MultiPoint is simple if no two Points in the MultiPoint are equal
// (have identical coordinate values in X and Y)
//
// Reference: OGC 06-103r4 (6.1.5)
template <typename MultiPoint, bool AllowEmptyMultiGeometries>
struct is_valid<MultiPoint, multi_point_tag, AllowEmptyMultiGeometries>
{
template <typename VisitPolicy>
static inline bool apply(MultiPoint const& multipoint,
VisitPolicy& visitor)
{
boost::ignore_unused(multipoint, visitor);
if (BOOST_GEOMETRY_CONDITION(
AllowEmptyMultiGeometries || !boost::empty(multipoint)))
{
// we allow empty multi-geometries, so an empty multipoint
// is considered valid
return ! detail::is_valid::has_invalid_coordinate
<
MultiPoint
>::apply(multipoint, visitor);
}
else
{
// we do not allow an empty multipoint
return visitor.template apply<failure_few_points>();
}
}
};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
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