[antlr-interest] ANTLR NUB

[Gavin Lambert]

At 08:37 22/01/2008, Andy Tripp wrote:
 >
 >Try replacing OCCURRENCE, YEAR, and DAY_OF_MONTH with a single 
rule
 >for handling numbers:
 >
 >NUMBER: ('0'..'9)*;

Yeah, that's another thing you need to watch out for: never have a 
top-level lexer rule that can match nothing.  (It leads to 
infinite loops, since it can always match nothing without 
advancing the input stream.)

So you need to use + in preference to *, as I said earlier :)