Merge branch 'support-dune-functions-2.6' into 'master'

Provide backward-compatibility with dune-functions-2.6

See merge request !29

dune/fufem/functionspacebases/dunefunctionsbasis.hh

@@ -8,6 +8,8 @@
    @author Oliver Sander
  */
 
+#include <dune/common/version.hh>
+
 #include <dune/fufem/functionspacebases/functionspacebasis.hh>
 
 
@@ -71,8 +73,17 @@ public:
    */
   int index(const Element& element, const int i) const
   {
+#if DUNE_VERSION_LT(DUNE_FUNCTIONS,2,7)
+    auto localIndexSet = dfBasis_.localIndexSet();
+
+    localView_.bind(element);
+    localIndexSet.bind(localView_);
+
+    return localIndexSet.index(i)[0];
+#else
     localView_.bind(element);
     return localView_.index(i)[0];
+#endif
   }
 
 protected: