Am Thursday 30 April 2009 11:25:28 schrieb Florian Barth:
> Hi everyone!
> I'm writing a language transformator based on AntLR and I'm running
> into some problems:
> In order to transform conditional statement my parser constructs the
> following AST:
> The first problem I'm running into is that '?' and '*' seem to be not
> allowed in tree grammars
I think you must write it with parens like: (^(NODE foo))*
try this:
cond : ^(IF
^(CONDITION conds+=condExpression)
^(THEN thens+=expression)
(^(ELSEIF
^(conds+=CONDITION condExpression)
^(thens+=THEN expression)
))*
(^(ELSE else=expression))?
)
Michael
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