Imported Upstream version 1.49.0upstream/1.49.0

1 files changed, 95 insertions, 0 deletions

diff --git a/boost/geometry/algorithms/num_geometries.hpp b/boost/geometry/algorithms/num_geometries.hpp
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+++ b/boost/geometry/algorithms/num_geometries.hpp
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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_ALGORITHMS_NUM_GEOMETRIES_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_NUM_GEOMETRIES_HPP
+
+#include <cstddef>
+
+#include <boost/mpl/assert.hpp>
+
+#include <boost/geometry/core/tag.hpp>
+#include <boost/geometry/core/tags.hpp>
+#include <boost/geometry/core/tag_cast.hpp>
+
+#include <boost/geometry/geometries/concepts/check.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+
+template <typename Tag, typename Geometry>
+struct num_geometries
+{
+    BOOST_MPL_ASSERT_MSG
+        (
+            false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
+            , (types<Geometry>)
+        );
+};
+
+
+template <typename Geometry>
+struct num_geometries<single_tag, Geometry>
+{
+    static inline std::size_t apply(Geometry const&)
+    {
+        return 1;
+    }
+};
+
+
+
+} // namespace dispatch
+#endif
+
+
+/*!
+\brief \brief_calc{number of geometries}
+\ingroup num_geometries
+\details \details_calc{num_geometries, number of geometries}.
+\tparam Geometry \tparam_geometry
+\param geometry \param_geometry
+\return \return_calc{number of geometries}
+
+\qbk{[include reference/algorithms/num_geometries.qbk]}
+*/
+template <typename Geometry>
+inline std::size_t num_geometries(Geometry const& geometry)
+{
+    concept::check<Geometry const>();
+
+    return dispatch::num_geometries
+        <
+            typename tag_cast
+                <
+                    typename tag<Geometry>::type,
+                    single_tag,
+                    multi_tag
+                >::type,
+            Geometry
+        >::apply(geometry);
+}
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_NUM_GEOMETRIES_HPP