[antlr-interest] Re: Real examples of error recovery

[Paul J. Lucas]

--- In antlr-interest at yahoogroups.com, Ric Klaren <klaren at c...> wrote:
> I assume you're using multiple lexers and a tokenstream selector to
> implement those?

I have two lexers: (1) for "main" XQuery content and (2) for embedded XML content.  Yes, I 
am using a tokenstream selector.

> Tack something like this after the rule:
> 
> rule: .... ;
> exception catch [antlr::RecognitionException &ex]  { }

Well, I do still want to report the error.

> You can use the $FOLLOW/$FIRST sets inside the exception
> handler or $FOLLOW(rule) $FIRST(rule) to do calculations outside of a rule.

I've never seen any mention of those.  Any documentation or examples?

> There's probably a load of papers available on the net on recovery
> strategies.

I tried a search for 'ANTLR "error recovery"' and didn't find anything interesting.

> consumeUntil(); Check out the CharScanner docs/class definition.

Thanks for the tip.

- Paul



 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/antlr-interest/

<*> To unsubscribe from this group, send an email to:
    antlr-interest-unsubscribe at yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/