vendor/twig/twig/lib/Twig/TokenParser/Extends.php

   1 <?php
   2
   3 /*
   4  * This file is part of Twig.
   5  *
   6  * (c) 2009 Fabien Potencier
   7  * (c) 2009 Armin Ronacher
   8  *
   9  * For the full copyright and license information, please view the LICENSE
  10  * file that was distributed with this source code.
  11  */
  12
  13 /**
  14  * Extends a template by another one.
  15  *
  16  * <pre>
  17  *  {% extends "base.html" %}
  18  * </pre>
  19  */
  20 class Twig_TokenParser_Extends extends Twig_TokenParser
  21 {
  22     /**
  23      * Parses a token and returns a node.
  24      *
  25      * @param Twig_Token $token A Twig_Token instance
  26      *
  27      * @return Twig_NodeInterface A Twig_NodeInterface instance
  28      */
  29     public function parse(Twig_Token $token)
  30     {
  31         if (!$this->parser->isMainScope()) {
  32             throw new Twig_Error_Syntax('Cannot extend from a block', $token->getLine(), $this->parser->getFilename());
  33         }
  34
  35         if (null !== $this->parser->getParent()) {
  36             throw new Twig_Error_Syntax('Multiple extends tags are forbidden', $token->getLine(), $this->parser->getFilename());
  37         }
  38         $this->parser->setParent($this->parser->getExpressionParser()->parseExpression());
  39
  40         $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
  41     }
  42
  43     /**
  44      * Gets the tag name associated with this token parser.
  45      *
  46      * @return string The tag name
  47      */
  48     public function getTag()
  49     {
  50         return 'extends';
  51     }
  52 }