Just a guess: did you use ANTLRworks? If not, it is indeed quite hard to
see the cause.
Andreas
Sam Barnett-Cormack schrieb:
> Hi all,
>
> I've wracked my brains on this one, and really can't see what's going on.
>
> I've got one error in my grammar, and I just can't see how it's come
> about. I've been listening to everything people have said, I've been
> trying to apply what I've learned, most notably drilling into rules
> and expanding out to see why it says a choice is unreachable, but it
> doesn't make sense.
>
> The rule with the error is on line 300:
>
> globalModuleReference : modulereference (objectIdentifierValue |
> definedValue)? ;
>
> With the error:
>
> (201): The following alternatives can never be matched: 3
>
> Accompanying warnings:
>
> (200): Decision can match input such as "CAPID" using multiple
> alternatives: 2, 3
> As a result, alternative(s) 3 were disabled for that input
>
> (200): Decision can match input such as "LCID" using multiple
> alternatives: 2, 3
> As a result, alternative(s) 3 were disabled for that input
>
> The problem is, neither objectIdentifierValue is nillable,
> objectIdentifierValue must start with '{', and defined value can start
> with CAPID or LCID. So where's the ambiguity? It's got a choice of
> matching '{', CAPID, LCID, or stopping for this rule.
>
> Hoping someone can shed some light on this before I get too much of a
> headache...
>
> Sam
> ------------------------------------------------------------------------
>
>
> List: http://www.antlr.org/mailman/listinfo/antlr-interest
> Unsubscribe:
> http://www.antlr.org/mailman/options/antlr-interest/your-email-address
List: http://www.antlr.org/mailman/listinfo/antlr-interest
Unsubscribe:
http://www.antlr.org/mailman/options/antlr-interest/your-email-address
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"il-antlr-interest" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/il-antlr-interest?hl=en
-~----------~----~----~----~------~----~------~--~---
