Thanks, that's helpful. In the whitespace rule, why is it using skip() instead of $channel=HIDDEN? - Brian On 11/24/06, Terence Parr <parrt at cs.usfca.edu> wrote: > http://www.antlr.org/wiki/display/ANTLR3/Expression+evaluator > > Just the code w/o discussion. Taken from the book, but figured it > would help. > > Ter > >