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

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2014, Oracle and/or its affiliates.
   4
   5 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
   6
   7 // Licensed under the Boost Software License version 1.0.
   8 // http://www.boost.org/users/license.html
   9
  10 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP
  11 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP
  12
  13 #include <boost/variant/apply_visitor.hpp>
  14 #include <boost/variant/static_visitor.hpp>
  15 #include <boost/variant/variant_fwd.hpp>
  16
  17 #include <boost/geometry/geometries/concepts/check.hpp>
  18
  19 #include <boost/geometry/algorithms/dispatch/is_simple.hpp>
  20
  21
  22 namespace boost { namespace geometry
  23 {
  24
  25
  26 namespace resolve_variant {
  27
  28 template <typename Geometry>
  29 struct is_simple
  30 {
  31     static inline bool apply(Geometry const& geometry)
  32     {
  33         concepts::check<Geometry const>();
  34         return dispatch::is_simple<Geometry>::apply(geometry);
  35     }
  36 };
  37
  38 template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
  39 struct is_simple<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
  40 {
  41     struct visitor : boost::static_visitor<bool>
  42     {
  43         template <typename Geometry>
  44         bool operator()(Geometry const& geometry) const
  45         {
  46             return is_simple<Geometry>::apply(geometry);
  47         }
  48     };
  49
  50     static inline bool
  51     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
  52     {
  53         return boost::apply_visitor(visitor(), geometry);
  54     }
  55 };
  56
  57 } // namespace resolve_variant
  58
  59
  60
  61 /*!
  62 \brief \brief_check{is simple}
  63 \ingroup is_simple
  64 \tparam Geometry \tparam_geometry
  65 \param geometry \param_geometry
  66 \return \return_check{is simple}
  67
  68 \qbk{[include reference/algorithms/is_simple.qbk]}
  69 */
  70 template <typename Geometry>
  71 inline bool is_simple(Geometry const& geometry)
  72 {
  73     return resolve_variant::is_simple<Geometry>::apply(geometry);
  74 }
  75
  76
  77 }} // namespace boost::geometry
  78
  79
  80 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP