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diff --git a/boost/geometry/algorithms/detail/sections/section_functions.hpp b/boost/geometry/algorithms/detail/sections/section_functions.hpp
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+++ b/boost/geometry/algorithms/detail/sections/section_functions.hpp
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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2015 Barend Gehrels, 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_SECTIONS_FUNCTIONS_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_SECTIONS_FUNCTIONS_HPP
+
+
+#include <boost/geometry/core/access.hpp>
+#include <boost/geometry/algorithms/detail/recalculate.hpp>
+#include <boost/geometry/policies/robustness/robust_point_type.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace section
+{
+
+template
+<
+    std::size_t Dimension,
+    typename Point,
+    typename RobustBox,
+    typename RobustPolicy
+>
+static inline bool preceding(int dir, Point const& point,
+            RobustBox const& robust_box,
+            RobustPolicy const& robust_policy)
+{
+    typename geometry::robust_point_type<Point, RobustPolicy>::type robust_point;
+    geometry::recalculate(robust_point, point, robust_policy);
+    return (dir == 1  && get<Dimension>(robust_point) < get<min_corner, Dimension>(robust_box))
+        || (dir == -1 && get<Dimension>(robust_point) > get<max_corner, Dimension>(robust_box));
+}
+
+template
+<
+    std::size_t Dimension,
+    typename Point,
+    typename RobustBox,
+    typename RobustPolicy
+>
+static inline bool exceeding(int dir, Point const& point,
+            RobustBox const& robust_box,
+            RobustPolicy const& robust_policy)
+{
+    typename geometry::robust_point_type<Point, RobustPolicy>::type robust_point;
+    geometry::recalculate(robust_point, point, robust_policy);
+    return (dir == 1  && get<Dimension>(robust_point) > get<max_corner, Dimension>(robust_box))
+        || (dir == -1 && get<Dimension>(robust_point) < get<min_corner, Dimension>(robust_box));
+}
+
+
+}} // namespace detail::section
+#endif
+
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_SECTIONS_FUNCTIONS_HPP