ceph/src/boost/libs/geometry/include/boost/geometry/algorithms/detail/is_valid/pointlike.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2014-2015, Oracle and/or its affiliates.
   4
   5 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
   6 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   7
   8 // Licensed under the Boost Software License version 1.0.
   9 // http://www.boost.org/users/license.html
  10
  11 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
  12 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP
  13
  14 #include <boost/core/ignore_unused.hpp>
  15 #include <boost/range.hpp>
  16
  17 #include <boost/geometry/core/tags.hpp>
  18
  19 #include <boost/geometry/algorithms/validity_failure_type.hpp>
  20 #include <boost/geometry/algorithms/detail/is_valid/has_invalid_coordinate.hpp>
  21 #include <boost/geometry/algorithms/dispatch/is_valid.hpp>
  22
  23 #include <boost/geometry/util/condition.hpp>
  24
  25
  26 namespace boost { namespace geometry
  27 {
  28
  29
  30
  31 #ifndef DOXYGEN_NO_DISPATCH
  32 namespace dispatch
  33 {
  34
  35 // A point is always simple
  36 template <typename Point>
  37 struct is_valid<Point, point_tag>
  38 {
  39     template <typename VisitPolicy>
  40     static inline bool apply(Point const& point, VisitPolicy& visitor)
  41     {
  42         boost::ignore_unused(visitor);
  43         return ! detail::is_valid::has_invalid_coordinate
  44             <
  45                 Point
  46             >::apply(point, visitor);
  47     }
  48 };
  49
  50
  51
  52 // A MultiPoint is simple if no two Points in the MultiPoint are equal
  53 // (have identical coordinate values in X and Y)
  54 //
  55 // Reference: OGC 06-103r4 (6.1.5)
  56 template <typename MultiPoint, bool AllowEmptyMultiGeometries>
  57 struct is_valid<MultiPoint, multi_point_tag, AllowEmptyMultiGeometries>
  58 {
  59     template <typename VisitPolicy>
  60     static inline bool apply(MultiPoint const& multipoint,
  61                              VisitPolicy& visitor)
  62     {
  63         boost::ignore_unused(multipoint, visitor);
  64
  65         if (BOOST_GEOMETRY_CONDITION(
  66                 AllowEmptyMultiGeometries || !boost::empty(multipoint)))
  67         {
  68             // we allow empty multi-geometries, so an empty multipoint
  69             // is considered valid
  70             return ! detail::is_valid::has_invalid_coordinate
  71                 <
  72                     MultiPoint
  73                 >::apply(multipoint, visitor);
  74         }
  75         else
  76         {
  77             // we do not allow an empty multipoint
  78             return visitor.template apply<failure_few_points>();
  79         }
  80     }
  81 };
  82
  83
  84 } // namespace dispatch
  85 #endif // DOXYGEN_NO_DISPATCH
  86
  87
  88 }} // namespace boost::geometry
  89
  90
  91 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_POINTLIKE_HPP