[exDM69]

There are plenty of other parser generators than ANTLR and interesting parsing techniques that fit the bill. Not that there's anything wrong with ANTLR.

The last few time when I've been working on programming language prototypes, I've written the parser using Parsec parser combinators in Haskell. It's super fast and easy to use, however it's more like syntactic sugar for recursive descent parsers than a rigorous parser generator that works for a certain grammar class.