I apologize for the potential double post. But I meant something like this
where I am trying to throw an error when a condition is met.
LPAREN LBRACE { $LPAREN.index == $LBRACE.index - 1 }? arrayElementList? RBRACE
RPAREN { $RBRACE.index == $RPAREN.index - 1 }?
Regards,
Carter.
--- On Fri, 1/23/09, Jim Idle <[email protected]> wrote:
> From: Jim Idle <[email protected]>
> Subject: Re: [antlr-interest] customizing error messages for syntactic
> predicates
> To:
> Cc: [email protected]
> Date: Friday, January 23, 2009, 10:31 AM
> Carter Cheng wrote:
> > Hello,
> >
> > This is probably something that is quite easy- but how
> does one go about customizing error messages resulting from
> a predicate type check? The standard error messages can be
> rather cryptic.
> >
>
> Do you mean things like "predicate failed."? If
> you get that it means
> you have not covered all the alts and need to supply more
> options to the
> grammar :-)
>
> Jim
>
>
>
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