ceph/src/boost/libs/geometry/include/boost/geometry/algorithms/detail/distance/default_strategies.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
   6 // Copyright (c) 2013-2014 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // This file was modified by Oracle on 2014.
   9 // Modifications copyright (c) 2014, Oracle and/or its affiliates.
  10
  11 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
  12
  13 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  14 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  15
  16 // Use, modification and distribution is subject to the Boost Software License,
  17 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  18 // http://www.boost.org/LICENSE_1_0.txt)
  19
  20 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_DEFAULT_STRATEGIES_HPP
  21 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_DEFAULT_STRATEGIES_HPP
  22
  23 #include <boost/geometry/core/cs.hpp>
  24 #include <boost/geometry/core/tag.hpp>
  25 #include <boost/geometry/core/tag_cast.hpp>
  26 #include <boost/geometry/core/tags.hpp>
  27 #include <boost/geometry/core/point_type.hpp>
  28 #include <boost/geometry/core/reverse_dispatch.hpp>
  29
  30 #include <boost/geometry/strategies/distance.hpp>
  31
  32
  33 namespace boost { namespace geometry
  34 {
  35
  36 #ifndef DOXYGEN_NO_DETAIL
  37 namespace detail { namespace distance
  38 {
  39
  40
  41
  42 // Helper metafunction for default strategy retrieval
  43 template
  44 <
  45     typename Geometry1,
  46     typename Geometry2 = Geometry1,
  47     typename Tag1 = typename tag_cast
  48         <
  49             typename tag<Geometry1>::type, pointlike_tag
  50         >::type,
  51     typename Tag2 = typename tag_cast
  52         <
  53             typename tag<Geometry2>::type, pointlike_tag
  54         >::type,
  55     bool Reverse = geometry::reverse_dispatch<Geometry1, Geometry2>::type::value
  56 >
  57 struct default_strategy
  58     : strategy::distance::services::default_strategy
  59           <
  60               point_tag, segment_tag,
  61               typename point_type<Geometry1>::type,
  62               typename point_type<Geometry2>::type
  63           >
  64 {};
  65
  66 template
  67 <
  68     typename Geometry1,
  69     typename Geometry2,
  70     typename Tag1,
  71     typename Tag2
  72 >
  73 struct default_strategy<Geometry1, Geometry2, Tag1, Tag2, true>
  74     : default_strategy<Geometry2, Geometry1, Tag2, Tag1, false>
  75 {};
  76
  77
  78 template <typename Pointlike1, typename Pointlike2>
  79 struct default_strategy
  80     <
  81         Pointlike1, Pointlike2,
  82         pointlike_tag, pointlike_tag, false
  83     > : strategy::distance::services::default_strategy
  84           <
  85               point_tag, point_tag,
  86               typename point_type<Pointlike1>::type,
  87               typename point_type<Pointlike2>::type
  88           >
  89 {};
  90
  91
  92 template <typename Pointlike, typename Box>
  93 struct default_strategy<Pointlike, Box, pointlike_tag, box_tag, false>
  94     : strategy::distance::services::default_strategy
  95           <
  96               point_tag, box_tag,
  97               typename point_type<Pointlike>::type,
  98               typename point_type<Box>::type
  99           >
 100 {};
 101
 102
 103 template <typename Box1, typename Box2>
 104 struct default_strategy<Box1, Box2, box_tag, box_tag, false>
 105     : strategy::distance::services::default_strategy
 106           <
 107               box_tag, box_tag,
 108               typename point_type<Box1>::type,
 109               typename point_type<Box2>::type
 110           >
 111 {};
 112
 113
 114
 115 // Helper metafunction for default point-segment strategy retrieval
 116 template <typename Geometry1, typename Geometry2, typename Strategy>
 117 struct default_ps_strategy
 118     : strategy::distance::services::default_strategy
 119           <
 120               point_tag, segment_tag,
 121               typename point_type<Geometry1>::type,
 122               typename point_type<Geometry2>::type,
 123               typename cs_tag<typename point_type<Geometry1>::type>::type,
 124               typename cs_tag<typename point_type<Geometry2>::type>::type,
 125               Strategy
 126           >
 127 {};
 128
 129
 130
 131 }} // namespace detail::distance
 132 #endif // DOXYGEN_NO_DETAIL
 133
 134 }} // namespace boost::geometry
 135
 136
 137 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_DEFAULT_STRATEGIES_HPP