Added boost header

test/external/boost/geometry/algorithms/detail/as_range.hpp

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+// 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_ALGORITHMS_DETAIL_AS_RANGE_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_AS_RANGE_HPP
+
+
+#include <boost/type_traits.hpp>
+
+#include <boost/geometry/core/exterior_ring.hpp>
+#include <boost/geometry/core/tag.hpp>
+#include <boost/geometry/core/tags.hpp>
+
+#include <boost/geometry/util/add_const_if_c.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+
+template <typename GeometryTag, typename Geometry, typename Range, bool IsConst>
+struct as_range
+{
+    static inline typename add_const_if_c<IsConst, Range>::type& get(
+            typename add_const_if_c<IsConst, Geometry>::type& input)
+    {
+        return input;
+    }
+};
+
+
+template <typename Geometry, typename Range, bool IsConst>
+struct as_range<polygon_tag, Geometry, Range, IsConst>
+{
+    static inline typename add_const_if_c<IsConst, Range>::type& get(
+            typename add_const_if_c<IsConst, Geometry>::type& input)
+    {
+        return exterior_ring(input);
+    }
+};
+
+
+} // namespace dispatch
+#endif // DOXYGEN_NO_DISPATCH
+
+// Will probably be replaced by the more generic "view_as", therefore in detail
+namespace detail
+{
+
+/*!
+\brief Function getting either the range (ring, linestring) itself
+or the outer ring (polygon)
+\details Utility to handle polygon's outer ring as a range
+\ingroup utility
+*/
+template <typename Range, typename Geometry>
+inline Range& as_range(Geometry& input)
+{
+    return dispatch::as_range
+        <
+            typename tag<Geometry>::type,
+            Geometry,
+            Range,
+            false
+        >::get(input);
+}
+
+
+/*!
+\brief Function getting either the range (ring, linestring) itself
+or the outer ring (polygon), const version
+\details Utility to handle polygon's outer ring as a range
+\ingroup utility
+*/
+template <typename Range, typename Geometry>
+inline Range const& as_range(Geometry const& input)
+{
+    return dispatch::as_range
+        <
+            typename tag<Geometry>::type,
+            Geometry,
+            Range,
+            true
+        >::get(input);
+}
+
+}
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_AS_RANGE_HPP