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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
- // Use, modification and distribution is subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_GEOMETRY_CORE_REVERSE_DISPATCH_HPP
- #define BOOST_GEOMETRY_CORE_REVERSE_DISPATCH_HPP
- #include <cstddef>
- #include <boost/mpl/if.hpp>
- #include <boost/type_traits/integral_constant.hpp>
- #include <boost/geometry/core/geometry_id.hpp>
- namespace boost { namespace geometry
- {
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail
- {
- // Different geometries: reverse_dispatch if second ID < first ID
- template <std::size_t GeometryId1, std::size_t GeometryId2>
- struct reverse_dispatch : boost::mpl::if_c
- <
- (GeometryId1 > GeometryId2),
- boost::true_type,
- boost::false_type
- >
- {};
- // Same geometry: never reverse_dispatch
- template <std::size_t GeometryId>
- struct reverse_dispatch<GeometryId, GeometryId> : boost::false_type {};
- } // namespace detail
- #endif // DOXYGEN_NO_DETAIL
- template <typename Geometry1, typename Geometry2>
- struct reverse_dispatch : detail::reverse_dispatch
- <
- geometry_id<Geometry1>::type::value,
- geometry_id<Geometry2>::type::value
- >
- {};
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_CORE_REVERSE_DISPATCH_HPP
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