import java.lang.ref.*;
/** currently this class exports only static methods to create repetitions; there are no public instance methods or constructors */
-public class Repeat extends Union {
+class Repeat extends Union {
- /** repeat zero or one times */
- public static Repeat maybe(Element e) { return new Repeat(e, true, false, null, false); }
- public static Repeat maybe(Element e, Object tag) { return new Repeat(e, true, false, null, false, tag); }
- /** repeat zero or more times */
- public static Repeat many0(Element e) { return new Repeat(e, true, true, null, false); }
- public static Repeat many0(Element e, Object tag) { return new Repeat(e, true, true, null, false, tag); }
- /** repeat zero or more times, separated by <tt>sep</tt> */
- public static Repeat many0(Element e, Element sep) { return new Repeat(e, true, true, sep, false); }
- public static Repeat many0(Element e, Element sep, Object tag) { return new Repeat(e, true, true, sep, false, tag); }
- /** repeat one or more times */
- public static Repeat many1(Element e) { return new Repeat(e, false, true, null, false); }
- public static Repeat many1(Element e, Object tag) { return new Repeat(e, false, true, null, false, tag); }
- /** repeat one or more times, separated by <tt>sep</tt> */
- public static Repeat many1(Element e, Element sep) { return new Repeat(e, false, true, sep, false); }
- public static Repeat many1(Element e, Element sep, Object tag) { return new Repeat(e, false, true, sep, false, tag); }
-
- /** repeat zero or more times, matching a maximal sequence of atoms */
- public static Repeat maximal0(Element e) { return new Repeat(e, true, true, null, true); }
- public static Repeat maximal0(Element e, Object tag) { return new Repeat(e, true, true, null, true, tag); }
- /** repeat one or more times, matching a maximal sequence of atoms */
- public static Repeat maximal1(Element e) { return new Repeat(e, false, true, null, true); }
- public static Repeat maximal1(Element e, Object tag) { return new Repeat(e, false, true, null, true, tag); }
- /** repeat one or more times, separated by an atom <tt>sep</tt>, matching a maximal sequence */
- public static Repeat maximal1(Element e, Element sep) { return new Repeat(e, false, true, sep, true); }
- public static Repeat maximal1(Element e, Element sep, Object tag) { return new Repeat(e, false, true, sep, true, tag); }
-
- private Repeat(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, boolean maximal) {
+ Repeat(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, boolean maximal) {
this(e, zeroOkay, manyOkay, separator, maximal, null); }
- private Repeat(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, boolean maximal, Object tag) {
+ 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(many1(e, separator)));
+ if (manyOkay) add(new Sequence.Singleton(Sequence.many1(e, separator)));
else add(new Sequence.Singleton(e));
} else {
add(new Sequence.RewritingSequence(tag, new Element[] { e }, null));