> [Building parse trees] is really great, good engineering, best practices, recommended by experts, etc. But... it takes too much code, so we can't do it. It t

> [Building parse trees] is really great, good engineering, best practices, recommended by experts, etc. But... it takes too much code, so we can't do it. It takes too much code in Python. (Not a phrase one gets to say often, but it’s generally true for tree processing code.) In, say, SML this sort of thing is wonderfully concise.