/* Copyright (c) 2006, Sun Microsystems, Inc.
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 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.javacc.parser;

/**
 * Describes zero-or-one regular expressions (<foo?>).
 */

public class RZeroOrOne extends RegularExpression {

  /**
   * The regular expression which is repeated zero or one times.
   */
  public RegularExpression regexpr;

  public Nfa GenerateNfa(boolean ignoreCase)
  {
     Nfa retVal = new Nfa();
     NfaState startState = retVal.start;
     NfaState finalState = retVal.end;

     Nfa temp = regexpr.GenerateNfa(ignoreCase);

     startState.AddMove(temp.start);
     startState.AddMove(finalState);
     temp.end.AddMove(finalState);

     return retVal;
  }

}
