This project gives me I have a solution please give me a problem feeling. I remember looking into yacc a while ago, for some reason but I can't really remember

This project gives me I have a solution please give me a problem feeling. I remember looking into yacc a while ago, for some reason but I can't really remember doing why. Might've been for a configuration type of deal, but nowadays I just use json for that because it intersects other areas of the code and therefore saves time.