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Edit File: reverse_dispatch.hpp

// 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