You seem to be at least at the level of this brief intro to Marpa, but may be able to find something of interest in it. Perhaps of more interest is Marpa debugging. Both these are articles I contributed to Gabor Szabo's Perl Maven website.

Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond

In reply to Re: First steps with Marpa::R2 and BNF by GrandFather
in thread First steps with Marpa::R2 and BNF by Discipulus

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