I switched over to ANTLR 4. It is strictly superior to ANTLR 3. The listener approach rather than embedding code in the grammar is very natural. Separating leads to clean grammars and clean action code. Odd thing is that I was stuck on 3 because 4 didn't support C yet and then I just switched to the Java target in an anti-C pique. Shoulda done that awhile ago.

TParr's The Definitive ANTLR 4 Reference is quite good. And so's this mega tutorial.

https://pragprog.com/book/tpantlr2/the-definitive-antlr-4-re...

ANTLR is my goto tool for DSLs.