[antlr-interest] PEG-style "and" predicates
Jim Idle
jimi at temporal-wave.com
Mon Jul 2 08:40:24 PDT 2007
> -----Original Message-----
> From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-
> bounces at antlr.org] On Behalf Of Wincent Colaiuta
> Sent: Monday, July 02, 2007 8:15 AM
> To: ANTLR Interest
> Subject: [antlr-interest] PEG-style "and" predicates
> I could change my rule to this:
>
> FOO : 'bar' ' '* ('\n' | '\r' | EOF) ;
>
> But that isn't what I want; I want a 'bar' token and I don't want the
> trailing whitespace and newline to be included in the token.
How about this (C Target):
FOO
: 'bar'
{ MARK(); }
' '* ('\n' | '\r' | EOF)
{ REWINDLAST(); }
;
Then assuming that bar without the trailing stuff can be managed by some
other rule, then it should be fine.
Jim
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