[antlr-interest] Shorthand notation for separated lists

[Jan Finis]

Hi,

is there a way to write an optional list of tokens separated by a 
separator token (like function parameters) more concise than this:

[ id ("," id)* ]

if not, I would suggest introducing such a notation, because such things 
are really frequently used. For example:

(id ** ",") is automatically expanded to [ id ("," id)* ] and
(id ++ ",") is automatically expaned to id ("," id)*

Regards,
Jan