[antlr-interest] Antlr Grammer help
Johannes Luber
JALuber at gmx.de
Wed Feb 11 04:36:51 PST 2009
> 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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