add support for visualising turn penalties in MLD Debug tiles (#4157)

- template function for tile functionality with edge finder operator
 - refactors unit tests into single function (reduce code duplication)
 - adds unit tests for core-ch

include/engine/algorithm.hpp

@@ -102,6 +102,9 @@ template <> struct HasShortestPathSearch<mld::Algorithm> final : std::true_type
 template <> struct HasMapMatching<mld::Algorithm> final : std::true_type
 {
 };
+template <> struct HasGetTileTurns<mld::Algorithm> final : std::true_type
+{
+};
 }
 }
 }

include/engine/routing_algorithms.hpp

@@ -221,15 +221,6 @@ RoutingAlgorithms<routing_algorithms::mld::Algorithm>::ManyToManySearch(
 {
     throw util::exception("ManyToManySearch is not implemented");
 }
-
-template <>
-inline std::vector<routing_algorithms::TurnData>
-RoutingAlgorithms<routing_algorithms::mld::Algorithm>::GetTileTurns(
-    const std::vector<datafacade::BaseDataFacade::RTreeLeaf> &,
-    const std::vector<std::size_t> &) const
-{
-    throw util::exception("GetTileTurns is not implemented");
-}
 }
 }
 

include/engine/routing_algorithms/tile_turns.hpp

@@ -33,6 +33,11 @@ getTileTurns(const datafacade::ContiguousInternalMemoryDataFacade<ch::Algorithm>
              const std::vector<RTreeLeaf> &edges,
              const std::vector<std::size_t> &sorted_edge_indexes);
 
+std::vector<TurnData>
+getTileTurns(const datafacade::ContiguousInternalMemoryDataFacade<mld::Algorithm> &facade,
+             const std::vector<RTreeLeaf> &edges,
+             const std::vector<std::size_t> &sorted_edge_indexes);
+
 } // namespace routing_algorithms
 } // namespace engine
 } // namespace osrm