ceph/src/boost/boost/geometry/core/coordinate_system.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   4 // Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6
   7 // This file was modified by Oracle on 2020.
   8 // Modifications copyright (c) 2020, Oracle and/or its affiliates.
   9 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  10
  11 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  12 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  13
  14 // Use, modification and distribution is subject to the Boost Software License,
  15 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 #ifndef BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
  19 #define BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
  20
  21
  22 #include <boost/geometry/core/point_type.hpp>
  23 #include <boost/geometry/core/static_assert.hpp>
  24 #include <boost/geometry/util/type_traits_std.hpp>
  25
  26
  27 namespace boost { namespace geometry
  28 {
  29
  30
  31 namespace traits
  32 {
  33
  34 /*!
  35 \brief Traits class defining the coordinate system of a point, important for strategy selection
  36 \ingroup traits
  37 \par Geometries:
  38     - point
  39 \par Specializations should provide:
  40     - typedef CS type; (cs::cartesian, cs::spherical, etc)
  41 */
  42 template <typename Point, typename Enable = void>
  43 struct coordinate_system
  44 {
  45     BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
  46         "Not implemented for this Point type.",
  47         Point);
  48 };
  49
  50 } // namespace traits
  51
  52
  53
  54 #ifndef DOXYGEN_NO_DISPATCH
  55 namespace core_dispatch
  56 {
  57     template <typename GeometryTag, typename G>
  58     struct coordinate_system
  59     {
  60         typedef typename point_type<GeometryTag, G>::type P;
  61
  62         // Call its own specialization on point-tag
  63         typedef typename coordinate_system<point_tag, P>::type type;
  64     };
  65
  66
  67     template <typename Point>
  68     struct coordinate_system<point_tag, Point>
  69     {
  70         typedef typename traits::coordinate_system
  71             <
  72                 typename util::remove_cptrref<Point>::type
  73             >::type type;
  74     };
  75
  76
  77 } // namespace core_dispatch
  78 #endif
  79
  80
  81 /*!
  82 \brief \brief_meta{type, coordinate system (cartesian\, spherical\, etc), \meta_point_type}
  83 \tparam Geometry \tparam_geometry
  84 \ingroup core
  85
  86 \qbk{[include reference/core/coordinate_system.qbk]}
  87 */
  88 template <typename Geometry>
  89 struct coordinate_system
  90 {
  91     typedef typename core_dispatch::coordinate_system
  92         <
  93             typename tag<Geometry>::type,
  94             typename util::remove_cptrref<Geometry>::type
  95         >::type type;
  96 };
  97
  98
  99 }} // namespace boost::geometry
 100
 101
 102 #endif // BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP