content: 
  package java_cup;
  
  /** 
   * This class represents a part of a production which contains an
   * action.  These are eventually eliminated from productions and converted
   * to trailing actions by factoring out with a production that derives the
   * empty string (and ends with this action).
   *
   * @see java_cup.production
   * @version last update: 11/25/95
   * @author Scott Hudson
   */
  
  public class action_part extends production_part {
  
    /*-----------------------------------------------------------*/
    /*--- Constructors ------------------------------------------*/
    /*-----------------------------------------------------------*/
  
    /** Simple constructor. 
     * @param code_str string containing the actual user code.
     */
    public action_part(String code_str)
      {
        super(/* never have a label on code */null);
        _code_string = code_str;
      }
  
    /*-----------------------------------------------------------*/
    /*--- (Access to) Instance Variables ------------------------*/
    /*-----------------------------------------------------------*/
  
    /** String containing code for the action in question. */
    protected String _code_string;
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** String containing code for the action in question. */
    public String code_string() {return _code_string;}
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Set the code string. */
    public void set_code_string(String new_str) {_code_string = new_str;}
  
    /*-----------------------------------------------------------*/
    /*--- General Methods ---------------------------------------*/
    /*-----------------------------------------------------------*/
  
    /** Override to report this object as an action. */
    public boolean is_action() { return true; }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Equality comparison for properly typed object. */
    public boolean equals(action_part other)
      {
        /* compare the strings */
        return other != null && super.equals(other) && 
  	     other.code_string().equals(code_string());
      }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Generic equality comparison. */
    public boolean equals(Object other)
      {
        if (!(other instanceof action_part)) 
  	return false;
        else
  	return equals((action_part)other);
      }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Produce a hash code. */
    public int hashCode()
      {
        return super.hashCode() ^ 
  	     (code_string()==null ? 0 : code_string().hashCode());
      }
  
    /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
  
    /** Convert to a string.  */
    public String toString()
      {
        return super.toString() + "{" + code_string() + "}";
      }
  
    /*-----------------------------------------------------------*/
  }
  