[antlr-interest] Rewrite rule for multiple alternatives

[Jan Obdrzalek]

Hi,

what is the correct way to write this rewrite rule?

   :    '{' (a | b | c)* '}'  -> ^(COMPOUND (a | b | c)*)

I.e. I want to have a tree with the root COMPOUND and with the children
given by the rules a,b,c in the original order. ANTLRv3 does not like my
intuitive notation :( And I do not want to change the grammar much. The
examples in the book are all a little bit different (unless I missed some).

Thanks for all suggestions,
    Jan
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