ceph/src/boost/libs/geometry/include/boost/geometry/core/geometry_id.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   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
  15 #ifndef BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
  16 #define BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
  17
  18
  19 #include <boost/mpl/assert.hpp>
  20 #include <boost/mpl/int.hpp>
  21
  22 #include <boost/geometry/core/tag.hpp>
  23 #include <boost/geometry/core/tags.hpp>
  24
  25
  26 namespace boost { namespace geometry
  27 {
  28
  29
  30 #ifndef DOXYGEN_NO_DISPATCH
  31 namespace core_dispatch
  32 {
  33
  34 template <typename GeometryTag>
  35 struct geometry_id
  36 {
  37     BOOST_MPL_ASSERT_MSG
  38         (
  39             false, NOT_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
  40             , (types<GeometryTag>)
  41         );
  42 };
  43
  44
  45 template <>
  46 struct geometry_id<point_tag>            : boost::mpl::int_<1> {};
  47
  48
  49 template <>
  50 struct geometry_id<linestring_tag>       : boost::mpl::int_<2> {};
  51
  52
  53 template <>
  54 struct geometry_id<polygon_tag>          : boost::mpl::int_<3> {};
  55
  56
  57 template <>
  58 struct geometry_id<multi_point_tag>      : boost::mpl::int_<4> {};
  59
  60
  61 template <>
  62 struct geometry_id<multi_linestring_tag> : boost::mpl::int_<5> {};
  63
  64
  65 template <>
  66 struct geometry_id<multi_polygon_tag>    : boost::mpl::int_<6> {};
  67
  68
  69 template <>
  70 struct geometry_id<segment_tag>          : boost::mpl::int_<92> {};
  71
  72
  73 template <>
  74 struct geometry_id<ring_tag>             : boost::mpl::int_<93> {};
  75
  76
  77 template <>
  78 struct geometry_id<box_tag>              : boost::mpl::int_<94> {};
  79
  80
  81 } // namespace core_dispatch
  82 #endif
  83
  84
  85
  86 /*!
  87 \brief Meta-function returning the id of a geometry type
  88 \details The meta-function geometry_id defines a numerical ID (based on
  89     boost::mpl::int_<...> ) for each geometry concept. A numerical ID is
  90     sometimes useful, and within Boost.Geometry it is used for the
  91     reverse_dispatch metafuntion.
  92 \note Used for e.g. reverse meta-function
  93 \ingroup core
  94 */
  95 template <typename Geometry>
  96 struct geometry_id : core_dispatch::geometry_id<typename tag<Geometry>::type>
  97 {};
  98
  99
 100 }} // namespace boost::geometry
 101
 102
 103 #endif // BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP