Move transformTreePath helper function to HierarchicNodeToRangeMap

src/amdis/functions/HierarchicNodeToRangeMap.hpp

@@ -15,7 +15,7 @@ namespace AMDiS
   /**
   * \brief A simple node to range map using the nested tree indices
   *
-  * This map directly usses the tree path entries of the given
+  * This map directly uses the tree path entries of the given
   * node to access the nested container.
   *
   * If the container does not provide any operator[] access,
@@ -23,19 +23,38 @@ namespace AMDiS
   */
   struct HierarchicNodeToRangeMap
   {
+    // Specialization for ranges with operator[] access
     template <class Node, class TreePath, class Range,
       REQUIRES(Dune::models<Dune::Functions::Concept::HasIndexAccess, Range, Dune::index_constant<0>>())>
     decltype(auto) operator()(const Node& node, const TreePath& treePath, Range&& y) const
     {
-      return Dune::Functions::resolveStaticMultiIndex(y, treePath);
+      return Dune::Functions::resolveStaticMultiIndex(y, transformTreePath(treePath));
     }
 
+    // Specialization for non-container ranges
     template <class Node, class TreePath, class Range,
       REQUIRES(not Dune::models<Dune::Functions::Concept::HasIndexAccess, Range, Dune::index_constant<0>>())>
     decltype(auto) operator()(const Node& node, const TreePath& treePath, Range&& y) const
     {
       return std::forward<Range>(y);
     }
+
+  private:
+#if DUNE_VERSION_GT(DUNE_FUNCTIONS,2,6)
+    template <class TreePath>
+    static TreePath const& transformTreePath(TreePath const& treePath)
+    {
+      return treePath;
+    }
+#else
+    // NOTE: due to a bug in dune-functions <= 2.6, a hybrid-treepath can not be passed to a HierarchicNodeToRangeMap,
+    // i.e. the HybridTreePath missed a size() function
+    template <class TreePath>
+    static auto transformTreePath(TreePath const& treePath)
+    {
+      return Tools::apply([](auto... i) { return Dune::makeTupleVector(i...); }, treePath._data);
+    }
+#endif
   };
 
 } // end namespace AMDiS

src/amdis/functions/Interpolate.hpp

@@ -85,7 +85,7 @@ namespace Impl {
       {
         const auto& tmp = localF_(x);
         const auto& tmp_vec = Dune::MatVec::as_vector(tmp);
-        y = Dune::Functions::flatVectorView(nodeToRangeEntry_(node_, transformTreePath(treePath_), tmp_vec))[comp_];
+        y = Dune::Functions::flatVectorView(nodeToRangeEntry_(node_, treePath_, tmp_vec))[comp_];
       }
 
       void setComponent(std::size_t comp)
@@ -93,20 +93,6 @@ namespace Impl {
         comp_ = comp;
       }
 
-#if DUNE_VERSION_GT(DUNE_FUNCTIONS,2,6)
-      static TreePath const& transformTreePath(TreePath const& treePath)
-      {
-        return treePath;
-      }
-#else
-      // NOTE: due to a bug in dune-functions <= 2.6, a hybrid-treepath can not be passed to a HierarchicNodeToRangeMap,
-      // i.e. the HybridTreePath missed a size() function
-      static auto transformTreePath(TreePath const& treePath)
-      {
-        return Tools::apply([](auto... i) { return Dune::makeTupleVector(i...); }, treePath._data);
-      }
-#endif
-
     private:
       Node const& node_;
       TreePath const& treePath_;