detail/overlay/do_reverse.hpp

0001 // Boost.Geometry (aka GGL, Generic Geometry Library)
0002
0003 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
0004 // Copyright (c) 2013 Adam Wulkiewicz, Lodz, Poland
0005
0006 // This file was modified by Oracle on 2020.
0007 // Modifications copyright (c) 2020 Oracle and/or its affiliates.
0008 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
0009
0010 // Use, modification and distribution is subject to the Boost Software License,
0011 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0012 // http://www.boost.org/LICENSE_1_0.txt)
0013
0014 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP
0015 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP
0016
0017 #include <boost/geometry/core/point_order.hpp>
0018
0019 namespace boost { namespace geometry
0020 {
0021
0022
0023 #ifndef DOXYGEN_NO_DETAIL
0024 namespace detail { namespace overlay
0025 {
0026
0027 // Metafunction helper for intersection and union
0028 template <order_selector Selector, bool Reverse = false>
0029 struct do_reverse {};
0030
0031 template <>
0032 struct do_reverse<clockwise, false> : std::false_type {};
0033
0034 template <>
0035 struct do_reverse<clockwise, true> : std::true_type {};
0036
0037 template <>
0038 struct do_reverse<counterclockwise, false> : std::true_type {};
0039
0040 template <>
0041 struct do_reverse<counterclockwise, true> : std::false_type {};
0042
0043
0044 }} // namespace detail::overlay
0045 #endif // DOXYGEN_NO_DETAIL
0046
0047
0048 }} // namespace boost::geometry
0049
0050
0051 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_DO_REVERSE_HPP