content: 
  package java_cup;
  
  /** This class serves as the base class for entries in a parse action table.  
   *  Full entries will either be SHIFT(state_num), REDUCE(production), NONASSOC,
   *  or ERROR. Objects of this base class will default to ERROR, while
   *  the other three types will be represented by subclasses. 
   * 
   * @see     java_cup.reduce_action
   * @see     java_cup.shift_action
   * @version last updated: 7/2/96
   * @author  Frank Flannery
   */
  
  public class parse_action {
  
    /*-----------------------------------------------------------*/
    /*--- Constructor(s) ----------------------------------------*/
    /*-----------------------------------------------------------*/
  
    /** Simple constructor. */
    public parse_action()
      {
        /* nothing to do in the base class */
      }
  
   
    /*-----------------------------------------------------------*/
    /*--- (Access to) Static (Class) Variables ------------------*/
    /*-----------------------------------------------------------*/
  
    /** Constant for action type -- error action. */
    public static final int ERROR = 0;
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Constant for action type -- shift action. */
    public static final int SHIFT = 1;
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Constants for action type -- reduce action. */
    public static final int REDUCE = 2;
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Constants for action type -- reduce action. */
    public static final int NONASSOC = 3;
  
    /*-----------------------------------------------------------*/
    /*--- General Methods ---------------------------------------*/
    /*-----------------------------------------------------------*/
  	 
    /** Quick access to the type -- base class defaults to error. */
    public int kind() {return ERROR;}
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Equality test. */
    public boolean equals(parse_action other)
      {
        /* we match all error actions */
        return other != null && other.kind() == ERROR;
      }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Generic equality test. */
    public boolean equals(Object other)
      {
        if (other instanceof parse_action)
  	return equals((parse_action)other);
        else
  	return false;
      }
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Compute a hash code. */
    public int hashCode()
      {
        /* all objects of this class hash together */
        return 0xCafe123;
      }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Convert to string. */
    public String toString() {return "ERROR";}
  
    /*-----------------------------------------------------------*/
  }
      
  