There are other tools for prototyping the grammar for a new language. There are several online tools that can interactively parse input based on a given grammar. The one I developed is: https://fransfaase.github.io/MCH2022ParserWorkshop/IParseStu... The page does contain a sample grammar and sample input. For the grammar for the grammar see: https://fransfaase.github.io/MCH2022ParserWorkshop/index.htm...