[antlr-interest] OPEN, EOF ambiguity

[Jim Idle]

You probably need to send the grammar rather than that graphic. It is likely something more fundamental and we cannot see what you predicates are doing from the graphic.

Jim

> -----Original Message-----
> From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-
> bounces at antlr.org] On Behalf Of Cameron Ross
> Sent: Thursday, April 08, 2010 12:34 PM
> To: antlr-interest at antlr.org
> Subject: [antlr-interest] OPEN, EOF ambiguity
> 
> Hi,
> 
> I have a grammar with an ambiguity that I just can't resolve.  When I
> check the grammar using AntlrWorks I get the following: "Decision can
> match input such as "{EOF, OPEN}" using multiple alternatives: 1, 2".
> I've attached a screen grab of the syntax diagram generated by
> AntrlWorks.  I don't understand why ANLTR is thinking that EOF is
> ambiguous with OPEN.  I've checked the grammar and clif_file is the
> only rule that is not referenced from within the grammar, so I don't
> think that ANLTR should see module as a start rule.  Any help is much
> appreciated.
> 
> Cameron