[antlr-interest] Breaking out of a parser loop based on the current item

[Monty Zukowski]

On Jul 19, 2004, at 5:09 PM, Richard Clark wrote:

> 2) Set up a loop that says:
>
>   ( WORD
>     ( if that word ends a sentence, or the next item is an @tag ) => {
> break }
>     | SPACE*) *
>
> I would prefer option 2, but I haven't been able to figure out how to
> end the loop in retrospect.

That would be nice, but is currently not possible in ANTLR.  I've had 
Ter explain it to me a few times but I can't remember the details right 
now.  It has to do with lookahead computations, I believe.  Anyhow you 
just can't do that.

Monty

ANTLR & Java Consultant -- http://www.codetransform.com
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