action_production.java

/*
 * STANDARD ML OF NEW JERSEY COPYRIGHT NOTICE, LICENSE AND DISCLAIMER.
 * 
 * Copyright (c) 1989-1998 by Lucent Technologies
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appear in all copies and that both the
 * copyright notice and this permission notice and warranty disclaimer appear
 * in supporting documentation, and that the name of Lucent Technologies, Bell
 * Labs or any Lucent entity not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior permission.
 *
 * Lucent disclaims all warranties with regard to this software, including all
 * implied warranties of merchantability and fitness. In no event shall Lucent
 * be liable for any special, indirect or consequential damages or any damages
 * whatsoever resulting from loss of use, data or profits, whether in an action
 * of contract, negligence or other tortious action, arising out of or in
 * connection with the use or performance of this software. 
 *
 * Taken from this URL:
 * http://www.smlnj.org/license.html
 * 
 * This license is compatible with the GNU GPL (see section "Standard ML of New
 * Jersey Copyright License"):
 * http://www.gnu.org/licenses/license-list.html#StandardMLofNJ
 */

/*
 * Copyright 1996-1999 by Scott Hudson, Frank Flannery, C. Scott Ananian
 */

package weka.core.parser.java_cup;

/** A specialized version of a production used when we split an existing
 *  production in order to remove an embedded action.  Here we keep a bit 
 *  of extra bookkeeping so that we know where we came from.
 * @version last updated: 11/25/95
 * @author  Scott Hudson
 */

public class action_production extends production {

  /** Constructor.
   * @param base       the production we are being factored out of.
   * @param lhs_sym    the LHS symbol for this production.
   * @param rhs_parts  array of production parts for the RHS.
   * @param rhs_len    how much of the rhs_parts array is valid.
   * @param action_str the trailing reduce action for this production.
   * @param indexOfIntermediateResult the index of the result of the previous intermediate action on the stack relative to top, -1 if no previous action
   */ 
  public action_production(
    production      base,
    non_terminal    lhs_sym, 
    production_part rhs_parts[],
    int             rhs_len,
    String          action_str,
    int             indexOfIntermediateResult)
    throws internal_error
    {
      super(lhs_sym, rhs_parts, rhs_len, action_str);
      _base_production = base;
      this.indexOfIntermediateResult = indexOfIntermediateResult;
    }
  private int indexOfIntermediateResult;
  /**
   * @return the index of the result of the previous intermediate action on the stack relative to top, -1 if no previous action
   */
  public int getIndexOfIntermediateResult(){
      return indexOfIntermediateResult;
  }
  /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/

  /** The production we were taken out of. */
  protected production _base_production;

  /** The production we were taken out of. */
  public production base_production() {return _base_production;}
}