<?php
/*
* This file is part of Twig.
*
* (c) 2009 Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Interface implemented by lexer classes.
*
* @package twig
* @author Fabien Potencier <fabien@symfony.com>
*/
interface Twig_LexerInterface
{
/**
* Tokenizes a source code.
*
* @param string $code The source code
* @param string $filename A unique identifier for the source code
*
* @return Twig_TokenStream A token stream instance
*/
function tokenize($code, $filename = null);
}