proposition: Lemma ByteString_enqueue_ByteString_measure : forall b b' : ByteString, length_ByteString (ByteString_enqueue_ByteString b b') = length_ByteString b + length_ByteString b'.
proof: Proof. intros; rewrite (ByteString_into_queue_eq b), (ByteString_into_queue_eq b'), ByteString_enqueue_ByteString_into_BitString. rewrite length_ByteString_queue_into_ByteString. rewrite app_length. rewrite <- !length_ByteString_queue_into_ByteString. reflexivity. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Bedrock.Word Coq.ZArith.ZArith Coq.NArith.NArith Coq.Arith.Arith Coq.Numbers.Natural.Peano.NPeano Coq.Logic.Eqdep_dec Fiat.Narcissus.Common.Specs