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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2014, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP
+
+#include <boost/geometry/core/point_type.hpp>
+
+#include <boost/geometry/strategies/distance.hpp>
+
+#include <boost/geometry/algorithms/intersects.hpp>
+
+#include <boost/geometry/algorithms/detail/distance/linear_to_linear.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace distance
+{
+
+
+template <typename Linear, typename Areal, typename Strategy>
+struct linear_to_areal
+{
+ typedef typename strategy::distance::services::return_type
+ <
+ Strategy,
+ typename point_type<Linear>::type,
+ typename point_type<Areal>::type
+ >::type return_type;
+
+ static inline return_type apply(Linear const& linear,
+ Areal const& areal,
+ Strategy const& strategy)
+ {
+ if ( geometry::intersects(linear, areal) )
+ {
+ return 0;
+ }
+
+ return linear_to_linear
+ <
+ Linear, Areal, Strategy
+ >::apply(linear, areal, strategy, false);
+ }
+
+
+ static inline return_type apply(Areal const& areal,
+ Linear const& linear,
+ Strategy const& strategy)
+ {
+ return apply(linear, areal, strategy);
+ }
+};
+
+
+template <typename Areal1, typename Areal2, typename Strategy>
+struct areal_to_areal
+{
+ typedef typename strategy::distance::services::return_type
+ <
+ Strategy,
+ typename point_type<Areal1>::type,
+ typename point_type<Areal2>::type
+ >::type return_type;
+
+ static inline return_type apply(Areal1 const& areal1,
+ Areal2 const& areal2,
+ Strategy const& strategy)
+ {
+ if ( geometry::intersects(areal1, areal2) )
+ {
+ return 0;
+ }
+
+ return linear_to_linear
+ <
+ Areal1, Areal2, Strategy
+ >::apply(areal1, areal2, strategy, false);
+ }
+};
+
+
+}} // namespace detail::distance
+#endif // DOXYGEN_NO_DETAIL
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+template <typename Linear, typename Areal, typename Strategy>
+struct distance
+ <
+ Linear, Areal, Strategy,
+ linear_tag, areal_tag,
+ strategy_tag_distance_point_segment, false
+ >
+ : detail::distance::linear_to_areal
+ <
+ Linear, Areal, Strategy
+ >
+{};
+
+
+template <typename Areal, typename Linear, typename Strategy>
+struct distance
+ <
+ Areal, Linear, Strategy,
+ areal_tag, linear_tag,
+ strategy_tag_distance_point_segment, false
+ >
+ : detail::distance::linear_to_areal
+ <
+ Linear, Areal, Strategy
+ >
+{};
+
+
+template <typename Areal1, typename Areal2, typename Strategy>
+struct distance
+ <
+ Areal1, Areal2, Strategy,
+ areal_tag, areal_tag,
+ strategy_tag_distance_point_segment, false
+ >
+ : detail::distance::areal_to_areal
+ <
+ Areal1, Areal2, Strategy
+ >
+{};
+
+
+} // namespace dispatch
+#endif // DOXYGEN_NO_DISPATCH
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_OR_AREAL_TO_AREAL_HPP