Allow semantically defined/custom predicates

tanakh / Peggy

The Parser Generator for Haskell

http://tanakh.github.com/Peggy

BSD 3-Clause "New" or "Revised" License

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Allow semantically defined/custom predicates #5

Open flaviusb opened 12 years ago

flaviusb commented 12 years ago

Maybe there is already a better way to do this, but it would be useful to be able to be able to make a rule not match in the semantic expression; that is, to force a rule failure based on running some Haskell code.