fact: Definition parse_of_production_respectful_step {str1 str2} (H : str1 =s str2) {pat pat'} (Hpat : production_code pat pat') (p : parse_of_production G str1 pat) : parse_of_production G str2 pat'.
imports: Coq.Lists.List Coq.Arith.PeanoNat Fiat.Common Fiat.Common.UIP Fiat.Parsers.ContextFreeGrammar.Core Fiat.Parsers.ContextFreeGrammar.Equality