Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@101: // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
Chris@101: // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
Chris@101: // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
Chris@101: 
Chris@101: // This file was modified by Oracle on 2014.
Chris@101: // Modifications copyright (c) 2014, Oracle and/or its affiliates.
Chris@101: 
Chris@101: // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_ALGORITHMS_NUM_GEOMETRIES_HPP
Chris@16: #define BOOST_GEOMETRY_ALGORITHMS_NUM_GEOMETRIES_HPP
Chris@16: 
Chris@16: #include <cstddef>
Chris@16: 
Chris@101: #include <boost/range.hpp>
Chris@101: 
Chris@101: #include <boost/variant/apply_visitor.hpp>
Chris@101: #include <boost/variant/static_visitor.hpp>
Chris@101: #include <boost/variant/variant_fwd.hpp>
Chris@101: 
Chris@16: #include <boost/geometry/algorithms/not_implemented.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/tag.hpp>
Chris@16: #include <boost/geometry/core/tags.hpp>
Chris@16: #include <boost/geometry/core/tag_cast.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/geometries/concepts/check.hpp>
Chris@16: 
Chris@101: #include <boost/geometry/algorithms/detail/counting.hpp>
Chris@101: 
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DISPATCH
Chris@16: namespace dispatch
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: template
Chris@16: <
Chris@16:     typename Geometry,
Chris@16:     typename Tag = typename tag_cast
Chris@16:                             <
Chris@16:                                 typename tag<Geometry>::type,
Chris@16:                                 single_tag,
Chris@16:                                 multi_tag
Chris@16:                             >::type
Chris@16: >
Chris@16: struct num_geometries: not_implemented<Tag>
Chris@16: {};
Chris@16: 
Chris@16: 
Chris@16: template <typename Geometry>
Chris@16: struct num_geometries<Geometry, single_tag>
Chris@101:     : detail::counting::other_count<1>
Chris@101: {};
Chris@101: 
Chris@101: 
Chris@101: template <typename MultiGeometry>
Chris@101: struct num_geometries<MultiGeometry, multi_tag>
Chris@16: {
Chris@101:     static inline std::size_t apply(MultiGeometry const& multi_geometry)
Chris@16:     {
Chris@101:         return boost::size(multi_geometry);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@101: } // namespace dispatch
Chris@101: #endif // DOXYGEN_NO_DISPATCH
Chris@16: 
Chris@101: 
Chris@101: namespace resolve_variant
Chris@101: {
Chris@101: 
Chris@101: template <typename Geometry>
Chris@101: struct num_geometries
Chris@101: {
Chris@101:     static inline std::size_t apply(Geometry const& geometry)
Chris@101:     {
Chris@101:         concept::check<Geometry const>();
Chris@101: 
Chris@101:         return dispatch::num_geometries<Geometry>::apply(geometry);
Chris@101:     }
Chris@101: };
Chris@101: 
Chris@101: template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
Chris@101: struct num_geometries<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
Chris@101: {
Chris@101:     struct visitor: boost::static_visitor<std::size_t>
Chris@101:     {
Chris@101:         template <typename Geometry>
Chris@101:         inline std::size_t operator()(Geometry const& geometry) const
Chris@101:         {
Chris@101:             return num_geometries<Geometry>::apply(geometry);
Chris@101:         }
Chris@101:     };
Chris@101: 
Chris@101:     static inline std::size_t
Chris@101:     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
Chris@101:     {
Chris@101:         return boost::apply_visitor(visitor(), geometry);
Chris@101:     }
Chris@101: };
Chris@101: 
Chris@101: } // namespace resolve_variant
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief \brief_calc{number of geometries}
Chris@16: \ingroup num_geometries
Chris@16: \details \details_calc{num_geometries, number of geometries}.
Chris@16: \tparam Geometry \tparam_geometry
Chris@16: \param geometry \param_geometry
Chris@16: \return \return_calc{number of geometries}
Chris@16: 
Chris@16: \qbk{[include reference/algorithms/num_geometries.qbk]}
Chris@16: */
Chris@16: template <typename Geometry>
Chris@16: inline std::size_t num_geometries(Geometry const& geometry)
Chris@16: {
Chris@101:     return resolve_variant::num_geometries<Geometry>::apply(geometry);
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_ALGORITHMS_NUM_GEOMETRIES_HPP