[antlr-interest] building ASTs for recursive lists

John D. Mitchell johnm-antlr at non.net
Thu Nov 18 08:57:57 PST 2004


>>>>> "Maassen," == Maassen, H A M <H.A.M.Maassen at student.tue.nl> writes:
[...]

> " Unfortunately, I can't seem to change logicalExpression to what I'd
> like:

> logicalExpression : relationalExpression ( logicalOperator^
> relationalExpression )*

> ;

Well, note clearly that you have a sub-clause there which can be *zero*.


> To build a proper tree.  Why can't I? Or even better? How can I? "

What do you mean by "proper"?

Take care,
	John


 
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