<?php
/*
* This file is part of Twig.
*
* (c) 2009 Fabien Potencier
* (c) 2009 Armin Ronacher
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Extends a template by another one.
*
* <pre>
* {% extends "base.html" %}
* </pre>
*/
class Twig_TokenParser_Extends extends Twig_TokenParser
{
/**
* Parses a token and returns a node.
*
* @param Twig_Token $token A Twig_Token instance
*
* @return Twig_NodeInterface A Twig_NodeInterface instance
*/
public function parse(Twig_Token $token)
{
if (!$this->parser->isMainScope()) {
throw new Twig_Error_Syntax('Cannot extend from a block', $token->getLine(), $this->parser->getFilename());
}
if (null !== $this->parser->getParent()) {
throw new Twig_Error_Syntax('Multiple extends tags are forbidden', $token->getLine(), $this->parser->getFilename());
}
$this->parser->setParent($this->parser->getExpressionParser()->parseExpression());
$this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
return null;
}
/**
* Gets the tag name associated with this token parser.
*
* @return string The tag name
*/
public function getTag()
{
return 'extends';
}
}