New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/routing/routing_result_graph.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "routing/loaded_path_segment.hpp"
+#include "routing/turn_candidate.hpp"
+
+#include "geometry/point_with_altitude.hpp"
+
+namespace routing
+{
+namespace turns
+{
+/*!
+ * \brief The IRoutingResult interface for the routing result. Uncouple router from the
+ * annotation code that describes turns. See routers for detail implementations.
+ */
+class IRoutingResult
+{
+public:
+  /// \returns information about all route segments.
+  virtual TUnpackedPathSegments const & GetSegments() const = 0;
+  /// \brief For a |segmentRange|, |junctionPoint| and |ingoingPoint| (point before the |junctionPoint|)
+  /// this method computes number of ingoing ways to |junctionPoint| and fills |outgoingTurns|.
+  /// \note This method should not be called for |segmentRange| of fake edges.
+  /// So method |segmentRange.IsClear()| should return false.
+  virtual void GetPossibleTurns(SegmentRange const & segmentRange, m2::PointD const & junctionPoint,
+                                size_t & ingoingCount, TurnCandidates & outgoingTurns) const = 0;
+  virtual double GetPathLength() const = 0;
+  virtual geometry::PointWithAltitude GetStartPoint() const = 0;
+  virtual geometry::PointWithAltitude GetEndPoint() const = 0;
+
+  virtual ~IRoutingResult() = default;
+};
+}  // namespace routing
+}  // namespace turns