[antlr-interest] Rewrite rule problem
Roger Jack
rjack at elegancetech.com
Mon Nov 5 05:39:01 PST 2012
Below are 3 rules from a grammar that I'm working on:
Snippet qualified_open_type_name:
'Global' (PERIOD identifier_or_keyword type_arity_list?)+
-> 'Global' ^(PERIOD identifier_or_keyword type_arity_list?)+;
type_arity_list: OPEN_PARENTHESIS 'Of' comma_list? CLOSE_PARENTHESIS
-> ^('Of' comma_list?);
comma_list: COMMA+;
When I call the qualified_open_type_name rule, I get the following results:
input: Global.AnId1.AnId2
tree: Global (. (ID AnId1)) (. (ID AnId2)) <- This is correct.
input: Global.AnId1 (Of ,,,).AnId2
tree: Global (. (ID AnId1) (Of , , ,)) (. (ID AnId2) (Of , , ,)) <-
Incorrect. The last (Of , , ,) should not be there.
Is my grammar incorrect? Is this a known bug? If it matters I'm using C#
as the output language.
Thanks!
--
Roger Jack
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