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03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
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36:
37: package edu.rice.cs.drjava.model.definitions.reducedmodel;
38:
39: /**
40: * This class represents a special state, passed by some methods that return
41: * states, to indicate that it is necessary to back up one position before
42: * continuing in an iteration over a TokenList. It probably shouldn't exist,
43: * and, hopefully, it would go away if the underlying logic of the reduced
44: * model were refactored.
45: *
46: * @version $Id: Stutter.java 4255 2007-08-28 19:17:37Z mgricken $
47: */
48: public class Stutter extends ReducedModelState {
49: /** Singleton instance. */
50: public static final Stutter ONLY = new Stutter();
51:
52: /** Singleton constructor. */
53: private Stutter() {
54: }
55:
56: ReducedModelState update(TokenList.Iterator copyCursor) {
57: if (copyCursor.atStart())
58: copyCursor.next();
59: return copyCursor.getStateAtCurrent();
60: }
61: }
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