ceph/src/boost/boost/geometry/policies/robustness/segment_ratio_type.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2013 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2013 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2013 Mateusz Loskot, London, UK.
   6 // Copyright (c) 2013 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // Use, modification and distribution is subject to the Boost Software License,
   9 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  10 // http://www.boost.org/LICENSE_1_0.txt)
  11
  12 #ifndef BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP
  13 #define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP
  14
  15 #include <boost/geometry/core/coordinate_type.hpp>
  16 #include <boost/geometry/policies/robustness/rescale_policy_tags.hpp>
  17
  18 #include <boost/config.hpp>
  19 #include <boost/mpl/if.hpp>
  20
  21 namespace boost { namespace geometry { namespace detail
  22 {
  23
  24 // Temporary meta-function to access segment-ratio for a policy
  25 template <typename Point, typename Policy>
  26 struct segment_ratio_type
  27 {
  28     // Type in segment ratio is either the coordinate type, or for
  29     // deprecated robust point types it is a long_long type
  30     typedef typename boost::mpl::if_c
  31     <
  32         boost::is_same
  33         <
  34             typename rescale_policy_type<Policy>::type,
  35             no_rescale_policy_tag
  36         >::value,
  37         typename geometry::coordinate_type<Point>::type,
  38         boost::long_long_type
  39     >::type coordinate_type;
  40
  41     // Define segment ratio based on the coordinate type
  42     typedef geometry::segment_ratio<coordinate_type> type;
  43 };
  44
  45
  46 }}} // namespace boost::geometry::deatil
  47
  48
  49 #endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP