ceph/src/boost/boost/geometry/algorithms/detail/is_simple/interface.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2014-2017, 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_SIMPLE_INTERFACE_HPP
  12 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP
  13
  14 #include <boost/variant/apply_visitor.hpp>
  15 #include <boost/variant/static_visitor.hpp>
  16 #include <boost/variant/variant_fwd.hpp>
  17
  18 #include <boost/geometry/geometries/concepts/check.hpp>
  19
  20 #include <boost/geometry/algorithms/dispatch/is_simple.hpp>
  21 #include <boost/geometry/core/cs.hpp>
  22 #include <boost/geometry/strategies/default_strategy.hpp>
  23 #include <boost/geometry/strategies/intersection.hpp>
  24
  25
  26 namespace boost { namespace geometry
  27 {
  28
  29 namespace resolve_strategy
  30 {
  31
  32 struct is_simple
  33 {
  34     template <typename Geometry, typename Strategy>
  35     static inline bool apply(Geometry const& geometry,
  36                              Strategy const& strategy)
  37     {
  38         return dispatch::is_simple<Geometry>::apply(geometry, strategy);
  39     }
  40
  41     template <typename Geometry>
  42     static inline bool apply(Geometry const& geometry,
  43                              default_strategy)
  44     {
  45         // NOTE: Currently the strategy is only used for Linear geometries
  46         typedef typename strategy::intersection::services::default_strategy
  47             <
  48                 typename cs_tag<Geometry>::type
  49             >::type strategy_type;
  50
  51         return dispatch::is_simple<Geometry>::apply(geometry, strategy_type());
  52     }
  53 };
  54
  55 } // namespace resolve_strategy
  56
  57 namespace resolve_variant
  58 {
  59
  60 template <typename Geometry>
  61 struct is_simple
  62 {
  63     template <typename Strategy>
  64     static inline bool apply(Geometry const& geometry, Strategy const& strategy)
  65     {
  66         concepts::check<Geometry const>();
  67
  68         return resolve_strategy::is_simple::apply(geometry, strategy);
  69     }
  70 };
  71
  72 template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
  73 struct is_simple<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
  74 {
  75     template <typename Strategy>
  76     struct visitor : boost::static_visitor<bool>
  77     {
  78         Strategy const& m_strategy;
  79
  80         visitor(Strategy const& strategy)
  81             : m_strategy(strategy)
  82         {}
  83
  84         template <typename Geometry>
  85         bool operator()(Geometry const& geometry) const
  86         {
  87             return is_simple<Geometry>::apply(geometry, m_strategy);
  88         }
  89     };
  90
  91     template <typename Strategy>
  92     static inline bool
  93     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
  94           Strategy const& strategy)
  95     {
  96         return boost::apply_visitor(visitor<Strategy>(strategy), geometry);
  97     }
  98 };
  99
 100 } // namespace resolve_variant
 101
 102
 103 /*!
 104 \brief \brief_check{is simple}
 105 \ingroup is_simple
 106 \tparam Geometry \tparam_geometry
 107 \tparam Strategy \tparam_strategy{Is_simple}
 108 \param geometry \param_geometry
 109 \param strategy \param_strategy{is_simple}
 110 \return \return_check{is simple}
 111
 112 \qbk{distinguish,with strategy}
 113 \qbk{[include reference/algorithms/is_simple.qbk]}
 114 */
 115 template <typename Geometry, typename Strategy>
 116 inline bool is_simple(Geometry const& geometry, Strategy const& strategy)
 117 {
 118     return resolve_variant::is_simple<Geometry>::apply(geometry, strategy);
 119 }
 120
 121
 122 /*!
 123 \brief \brief_check{is simple}
 124 \ingroup is_simple
 125 \tparam Geometry \tparam_geometry
 126 \param geometry \param_geometry
 127 \return \return_check{is simple}
 128
 129 \qbk{[include reference/algorithms/is_simple.qbk]}
 130 */
 131 template <typename Geometry>
 132 inline bool is_simple(Geometry const& geometry)
 133 {
 134     return resolve_variant::is_simple<Geometry>::apply(geometry, default_strategy());
 135 }
 136
 137
 138 }} // namespace boost::geometry
 139
 140
 141 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP