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Path: /data/applications/aps.bak/tikiwiki/7.0-0/standard/htdocs/lib/core/Math/Formula/ [ Home ]

File: Function.php

<?php
// (c) Copyright 2002-2011 by authors of the Tiki Wiki CMS Groupware Project
// 
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id: Function.php 33195 2011-03-02 17:43:40Z changi67 $

abstract class Math_Formula_Function
{
	private $callback;

	function evaluateTemplate( $element, $evaluateCallback ) {
		$this->callback = $evaluateCallback;
		return $this->evaluate( $element );
	}

	abstract function evaluate( $element );

	protected function evaluateChild( $child ) {
		return call_user_func( $this->callback, $child );
	}

	protected function error( $message ) {
		require_once 'Math/Formula/Exception.php';
		throw new Math_Formula_Exception( $message );
	}
}