| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| // Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
| // Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
| // Copyright (c) 2009-2011 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_IS_AREAL_HPP |
| #define BOOST_GEOMETRY_CORE_IS_AREAL_HPP |
| |
| |
| #include <boost/type_traits.hpp> |
| |
| |
| #include <boost/geometry/core/tag.hpp> |
| #include <boost/geometry/core/tags.hpp> |
| |
| |
| namespace boost { namespace geometry |
| { |
| |
| |
| #ifndef DOXYGEN_NO_DISPATCH |
| namespace core_dispatch |
| { |
| |
| template <typename GeometryTag> struct is_areal : boost::false_type {}; |
| |
| template <> struct is_areal<ring_tag> : boost::true_type {}; |
| template <> struct is_areal<box_tag> : boost::true_type {}; |
| template <> struct is_areal<polygon_tag> : boost::true_type {}; |
| |
| |
| } // namespace core_dispatch |
| #endif |
| |
| |
| |
| /*! |
| \brief Meta-function defining "true" for areal types (box, (multi)polygon, ring), |
| \note Used for tag dispatching and meta-function finetuning |
| \note Also a "ring" has areal properties within Boost.Geometry |
| \ingroup core |
| */ |
| template <typename Geometry> |
| struct is_areal : core_dispatch::is_areal<typename tag<Geometry>::type> |
| {}; |
| |
| |
| }} // namespace boost::geometry |
| |
| |
| #endif // BOOST_GEOMETRY_CORE_IS_AREAL_HPP |