Feature/master grid

Separation of different iteration strategies in multimesh iterator

dune/multimesh/utility/multibasis.hh

@@ -19,9 +19,9 @@ namespace Dune
     using MultiLeafGridView = typename MultiMesh::LeafGridView;
 
     /// Constructor. Stores a leafgridView of the MultiMesh and LocalView/LocalIndexSet of the bases
-    MultiBasis (MultiMesh const& mm, Bases&&... bases)
+    MultiBasis (MultiMesh const& mm, Bases const&... bases)
       : multiGridView_(mm.leafGridView())
-      , bases_{std::forward<Bases>(bases)...}
+      , bases_{bases...}
       , localViews_(Std::apply([](auto const&... b) { return std::make_tuple(b.localView()...); }, bases_))
       , localIndexSets_(Std::apply([](auto const&... b) { return std::make_tuple(b.localIndexSet()...); }, bases_))
     {}