Hermetic is amusing. Hask is very like what I&#x27;m aiming towards, not PLZoo. I&#x27;m starting with a PEG library (<a href="https:&#x2F;&#x2F;kschiess.github.io&#x2F;parslet&#x2F;" rel="nofollow">https:&#x2F;&#x2F;kschiess.github.io&#x2F;parslet&#x2F;</a>) and working my way up. I&#x27;d prefer to start with a GLL parser which could handle mildly context-sensitive grammars and work my way up but I think creating a PEG version as a proof of concept is the way to go first.<p>Thanks for the book reference!