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 // This file was modified by Oracle on 2020.
   9 // Modifications copyright (c) 2020 Oracle and/or its affiliates.
  10 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  11
  12 // Use, modification and distribution is subject to the Boost Software License,
  13 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  14 // http://www.boost.org/LICENSE_1_0.txt)
  15
  16 #ifndef BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP
  17 #define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP
  18
  19 #include <type_traits>
  20
  21 #include <boost/config.hpp>
  22
  23 #include <boost/geometry/core/coordinate_type.hpp>
  24 #include <boost/geometry/policies/robustness/rescale_policy_tags.hpp>
  25
  26 namespace boost { namespace geometry { namespace detail
  27 {
  28
  29 // Temporary meta-function to access segment-ratio for a policy
  30 template <typename Point, typename Policy>
  31 struct segment_ratio_type
  32 {
  33     // Type in segment ratio is either the coordinate type, or for
  34     // deprecated robust point types it is a long_long type
  35     typedef std::conditional_t
  36         <
  37             std::is_same
  38                 <
  39                     typename rescale_policy_type<Policy>::type,
  40                     no_rescale_policy_tag
  41                 >::value,
  42             typename geometry::coordinate_type<Point>::type,
  43             boost::long_long_type
  44         > coordinate_type;
  45
  46     // Define segment ratio based on the coordinate type
  47     typedef geometry::segment_ratio<coordinate_type> type;
  48 };
  49
  50
  51 }}} // namespace boost::geometry::deatil
  52
  53
  54 #endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP