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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_IS_AREAL_HPP
- #define BOOST_GEOMETRY_CORE_IS_AREAL_HPP
- #include <boost/type_traits/integral_constant.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 {};
- template <> struct is_areal<multi_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
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