SPARK v.s. PLY

[Andrew James]

Alan,
You might also want to have a look at TPG (Toy Parser Generator):
http://christophe.delord.free.fr/en/tpg

The documentation is pretty good, feature list extensive and though
there aren't too many examples and you'll have to write your own
grammar, it might be worth trying.

I'm working on a small language implementation at the moment and have
found TPG to be pretty easy to use (but fairly difficult to bugfix)

Regards,
Andrew