fact: Definition empty_Format {S T : Type} {monoid : Monoid T} {cache : Cache} : FormatM S T := fun s ce => ret (mempty, ce).
imports: Coq.ZArith.ZArith Fiat.Common Fiat.Computation.Notations Fiat.Narcissus.Common.Specs Fiat.Narcissus.Common.WordFacts Fiat.Computation.Refinements.General Fiat.Narcissus.BaseFormats