+ }
+
+ public static class Maximal extends Repeat {
+ public Maximal(final Element e, boolean zeroOkay, boolean manyOkay, final Atom 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 Invert(separator);
+ }
+ public Maximal(final Atom e, boolean zeroOkay, boolean manyOkay, Object tag) {
+ super(e, zeroOkay, manyOkay, null, true, tag);
+ for(Sequence s : this)
+ s.follow = new Invert(e);
+ }
+ }
+
+
+ /** an atom which tracks the inverse of some other atom */
+ private static class Invert<T extends Input> extends Atom<T> {
+ private final Atom<T> a;
+ public Invert(Atom<T> a) { this.a = a; }
+ public Topology<T> top() { return a.complement(); }
+ public String toString() { return "~"+a; }