I like this idea! Mind if I steal it for my PEG generator? This is probably the best property of PEGs, they're extremely extensible and flexible, you can add f

I like this idea! Mind if I steal it for my PEG generator? This is probably the best property of PEGs, they're extremely extensible and flexible, you can add features not possible in any other parsing technology, including high order parsers, dynamic extensibility, etc.