[antlr-interest] How to handle + when using arguments in Java code
Jim Idle
jimi at temporal-wave.com
Fri Nov 14 08:28:33 PST 2008
On Fri, 2008-11-14 at 13:05 +0100, Hendrik Maryns wrote:
> Hendrik Maryns schreef:
> > Hi all,
> >
> > 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
> >
I am not sure what your Formula class is, but the two patterns are:
n_ary returns [Formula result]
@init {
$result = new Formula();
}
: CONJUNCTION ( WHITESPACE f1=formula { $result.add($f1); } ) +
And
n_ary returns [Formula result]
: CONJUNCTION ( WHITESPACE f1+=formula ) + { $result = new
Formula($f1); } // f1 is a list
JIm
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