replace operator[] access by treePathEntry()

test/TreePathTest.cpp

@@ -15,7 +15,7 @@ template <class... I, class... J,
 bool compare(Dune::TypeTree::HybridTreePath<I...> const& tp1, Dune::TypeTree::HybridTreePath<J...> const& tp2)
 {
   return Ranges::applyIndices<sizeof...(I)>([&](auto... i) {
-    return ((tp1[i] == tp2[i]) &&...);
+    return ((Dune::TypeTree::treePathEntry(tp1,i) == Dune::TypeTree::treePathEntry(tp2,i)) &&...);
   });
 }