[antlr-interest] ANTLR 3.0 "feature"

[Gavin Lambert]

At 09:38 11/02/2007, Gilbert Williams wrote:
>ere_dupl_symbol    : '*'{prn("ere_dupl_symbol found:"+$text);}
>                    | '+'{prn("ere_dupl_symbol found:"+$text);}
>                    | '?'{prn("ere_dupl_symbol found:"+$text);}
>                    | '{' dup_count ',' dup_count 
> '}'{prn("ere_dupl_symbol found:"+$text);}
>                    | '{' dup_count 
> ','           '}'{prn("ere_dupl_symbol found:"+$text);}
>                    | '{' 
> dup_count               '}'{prn("ere_dupl_symbol found:"+$text);}

If you're going to be doing similar actions for those last three 
alts, then I would write it as a single alt like so:

| '{' dup_count (',' dup_count?)? '}' { prn(...); }

Doesn't really make a lot of difference, though.  I think :)