/*  SCCS - @(#)TrinaryExprNode.java	1.2 - 02/28/99 - 12:39:25 */

/*
 * Copyright (c) 1997 USC Brain Project. email nsl@java.usc.edu.
*/
package npp.src.util;

import pp.src.jbf.*;

public class TrinaryExprNode extends ExprNode {
  public TrinaryExprNode(ExprNode l, ExprNode m, ExprNode r) {
    super(l);
    left = l;
    mid = m;
    right = r;
  }

  /**
   * Code generation.
   * @param npp Nsl Preprocessor
   * @return error value
   */
  public int genCode(NslPreProcessor npp) {
    left.genCode(npp);
    mid.genCode(npp);
    right.genCode(npp);
    type = mid.type;
    code = "("+left.code + ")?(" + mid.code +"):(" + right.code +")";
    if (left.processed || mid.processed || right.processed)
      processed = true;
    if (left.type.type!=TypeNode.BOOL) {
      System.err.println("TriExpr: line "+(left.lineno+1)+
			 " char "+(left.charno+1)+
			 "\tOperand before '?' must be boolean type");
    }
   
    return NO_OP;

  }
  // return error code

  final public static int NO_OP = 0;

  public ExprNode left;
  public ExprNode mid;
  public ExprNode right;


}