[antlr-interest] how to deal with optional parameters in ast

Dave Cramer davec at postgresintl.com
Tue Mar 27 07:56:39 PDT 2007

I have a rule which is

WAKEUP 	expr*	NEWLINE					-> ^(WAKEUP expr*)

if the input is


the ast will just be ^ WAKEUP

What's the right way to deal with this ?

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