[antlr-interest] Antlr Grammer help

[Johannes Luber]

> Hi All,
> 
> I am new to Antlr.
> I have one grammer file with this syntax:
> 
> *option_statement !*  : "option" ( "base" (NUMBER)?
>                    | "compare" ("text"|"binary"|"database")?
>                    | "explicit"
>                    | "private" "module"
>                    | "internal" );
> *goto_statement !*  : "goto" goto_label;
> 
> What does this exclaimatory mark significants here?
>  i have generated parser from both ways keeping and removing and there are
> some change correspondingly.
> 
> Could anybody make me understand this ?
> 
> ANy help would be appreciated.
> 
> Thanks and Regards,
> Gunjan

Are you using ANTLR 3 or ANTLR 2.7.7? AFAIK, using ! at this place is used only in ANTLR 2.7.7 grammars. On <http://antlr2.org/> you might find the documentation.

Johannes

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