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 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
   8 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
   9
  10 // Use, modification and distribution is subject to the Boost Software License,
  11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12 // http://www.boost.org/LICENSE_1_0.txt)
  13
  14 #ifndef BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
  15 #define BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP
  16
  17
  18 #include <boost/mpl/assert.hpp>
  19
  20 #include <boost/geometry/core/point_type.hpp>
  21 #include <boost/geometry/util/bare_type.hpp>
  22
  23
  24 namespace boost { namespace geometry
  25 {
  26
  27
  28 namespace traits
  29 {
  30
  31 /*!
  32 \brief Traits class defining the coordinate system of a point, important for strategy selection
  33 \ingroup traits
  34 \par Geometries:
  35     - point
  36 \par Specializations should provide:
  37     - typedef CS type; (cs::cartesian, cs::spherical, etc)
  38 */
  39 template <typename Point, typename Enable = void>
  40 struct coordinate_system
  41 {
  42     BOOST_MPL_ASSERT_MSG
  43         (
  44             false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>)
  45         );
  46 };
  47
  48 } // namespace traits
  49
  50
  51
  52 #ifndef DOXYGEN_NO_DISPATCH
  53 namespace core_dispatch
  54 {
  55     template <typename GeometryTag, typename G>
  56     struct coordinate_system
  57     {
  58         typedef typename point_type<GeometryTag, G>::type P;
  59
  60         // Call its own specialization on point-tag
  61         typedef typename coordinate_system<point_tag, P>::type type;
  62     };
  63
  64
  65     template <typename Point>
  66     struct coordinate_system<point_tag, Point>
  67     {
  68         typedef typename traits::coordinate_system
  69             <
  70                 typename geometry::util::bare_type<Point>::type
  71             >::type type;
  72     };
  73
  74
  75 } // namespace core_dispatch
  76 #endif
  77
  78
  79 /*!
  80 \brief \brief_meta{type, coordinate system (cartesian\, spherical\, etc), \meta_point_type}
  81 \tparam Geometry \tparam_geometry
  82 \ingroup core
  83
  84 \qbk{[include reference/core/coordinate_system.qbk]}
  85 */
  86 template <typename Geometry>
  87 struct coordinate_system
  88 {
  89     typedef typename core_dispatch::coordinate_system
  90         <
  91             typename tag<Geometry>::type,
  92             typename geometry::util::bare_type<Geometry>::type
  93         >::type type;
  94 };
  95
  96
  97 }} // namespace boost::geometry
  98
  99
 100 #endif // BOOST_GEOMETRY_CORE_COORDINATE_SYSTEM_HPP