ceph/src/boost/boost/geometry/algorithms/detail/overlay/do_reverse.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2013 Adam Wulkiewicz, Lodz, Poland
   5
   6 // This file was modified by Oracle on 2020.
   7 // Modifications copyright (c) 2020 Oracle and/or its affiliates.
   8 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   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_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP
  15 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP
  16
  17 #include <boost/geometry/core/point_order.hpp>
  18
  19 namespace boost { namespace geometry
  20 {
  21
  22
  23 #ifndef DOXYGEN_NO_DETAIL
  24 namespace detail { namespace overlay
  25 {
  26
  27 // Metafunction helper for intersection and union
  28 template <order_selector Selector, bool Reverse = false>
  29 struct do_reverse {};
  30
  31 template <>
  32 struct do_reverse<clockwise, false> : std::false_type {};
  33
  34 template <>
  35 struct do_reverse<clockwise, true> : std::true_type {};
  36
  37 template <>
  38 struct do_reverse<counterclockwise, false> : std::true_type {};
  39
  40 template <>
  41 struct do_reverse<counterclockwise, true> : std::false_type {};
  42
  43
  44 }} // namespace detail::overlay
  45 #endif // DOXYGEN_NO_DETAIL
  46
  47
  48 }} // namespace boost::geometry
  49
  50
  51 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP