package com.jclark.xsl.expr;

import com.jclark.xsl.om.*;

class DifferenceFunction extends Function2 {
  ConvertibleExpr makeCallExpr(ConvertibleExpr e1, ConvertibleExpr e2)
    throws ParseException {
    final NodeSetExpr nse1 = e1.makeNodeSetExpr();
    final NodeSetExpr nse2 = e2.makeNodeSetExpr();
    return new ConvertibleNodeSetExpr() {
      public NodeIterator eval(Node node, ExprContext context) throws XSLException {
	return new DifferenceNodeIterator(nse1.eval(node, context),
					    nse2.eval(node, context));
      }
    };
  }
}