[antlr-interest] How to handle + when using arguments in Java code

[Hendrik Maryns]

Hendrik Maryns schreef:
> Hi all,
> 
> I have a rule like the following:
> 
> binary returns [Formula result]
> 	: IMPLICATION WHITESPACE first=formula WHITESPACE second=formula {
> $result = new Implication($first, $second); }
> 	| EQUIVALENCE WHITESPACE first=formula WHITESPACE second=formula {
> $result = new Equivalence($first, $second); }
> 	;
> 
> and I would like to do something similar for n-ary junctors, that is
> junctors that can take an arbitrary number of arguments.
> 
> The bare rule would be:
> /**
>  * Conjunction or disjunction.
>  */
> n_ary returns [Formula result]
> 	: CONJUNCTION ( WHITESPACE formula )+
> 	| DISJUNCTION ( WHITESPACE formula )+
> 	;
> 
> And for CONJUNCTION I would like new Conjunction(Formula... args) to be
> invoked with the formulas found (ignoring whitespace).  Similar for new
> Disjunction(Formula... args).  As you might guess
> 
> formula  returns [Formula result] …
> 
> is the starting rule.
> 
> Can I simply do { $result = new Equivalence($formula); } or something?

Surely this can’t be too difficult, I read something about adding stuff
to a list, but I forgot where.  Just a pointer would be fine really.  I
could define a constructor taking a list for both classes, NP.

TIA, H.
-- 
Hendrik Maryns
http://tcl.sfs.uni-tuebingen.de/~hendrik/
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