// $Id: FunctionOpt1.java 96 2005-02-28 21:07:29Z blindsey $

package com.jclark.xsl.expr;

import com.jclark.xsl.om.Node;

abstract class FunctionOpt1 implements Function {
    abstract ConvertibleExpr makeCallExpr(ConvertibleExpr e) throws ParseException;

    public ConvertibleExpr makeCallExpr(ConvertibleExpr e[], Node exprNode) throws ParseException {
        if (e.length > 1)
            throw new ParseException("expected zero or one argument");
        return makeCallExpr(e.length == 0 ? new SelfAxisExpr() : e[0]);
    }
}