Coming soon to a grammar engine near you

Next:

• {...} closures (via calls to Pugs/Parrot/other languages)
• <'...'>, <"...">
• rule parser
• negated subrules <!expr>
• lookahead / lookbehind
• combining rules <+alpha-[aeiou]>
• array named and numbered alias captures
• hash named and numbered alias captures
• more optimizations
• more tests
• other closure/subroutine calls