-functiontest :: TFVec D4 Bit -> TFVec D8 Bit
-functiontest = \v -> let r = v ++ $(vectorTH ([High,Low,High,Low] :: [Bit])) in r
+functiontest :: TFVec D3 (TFVec D4 Bit) -> TFVec D12 Bit
+functiontest = \v -> let r = concat v in r
+
+functiontest2 :: SizedInt D8 -> SizedInt D7
+functiontest2 = \a -> let r = Data.SizedInt.resize a in r