}
protected Repeat(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, boolean maximal, Object tag) {
super(e+(!manyOkay ? "?" : (zeroOkay ? (maximal ? "**" : "*") : (maximal ? "++" : "+")))+(separator==null?"":("/"+separator)), true);
- if (maximal && zeroOkay && separator != null)
- throw new RuntimeException("cannot create a maximal repetition of zero or more items with a separator (yet): " + this);
if (zeroOkay) {
add(new Sequence.Constant.Empty());
if (manyOkay) add(new Sequence.Singleton(Sequence.many1(e, separator)));
else
add(new Sequence.Unwrap(new Element[] { e, separator, Repeat.this }, tag, new boolean[] { false, true, false }));
}
- // FIXME: hack!
- if (maximal)
- for(Sequence s : this)
- s.follow = new edu.berkeley.sbp.misc.MetaGrammar.Invert(new edu.berkeley.sbp.misc.MetaGrammar.Infer(separator==null ? e : separator));
}
public static class Maximal extends Repeat {
public Maximal(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, Object tag) {
super(e, zeroOkay, manyOkay, separator, true, tag);
+ if (zeroOkay && separator != null)
+ throw new RuntimeException("cannot create a maximal repetition of zero or more items with a separator (yet): " + this);
+ for(Sequence s : this)
+ s.follow = new edu.berkeley.sbp.misc.MetaGrammar.Invert(new edu.berkeley.sbp.misc.MetaGrammar.Infer(separator));
+ }
+ public Maximal(final Element e, boolean zeroOkay, boolean manyOkay, Object tag) {
+ super(e, zeroOkay, manyOkay, null, true, tag);
+ for(Sequence s : this)
+ s.follow = new edu.berkeley.sbp.misc.MetaGrammar.Invert(new edu.berkeley.sbp.misc.MetaGrammar.Infer(e));
}
}