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   1  <?php
   2  
   3  /*
   4   * This file is part of Twig.
   5   *
   6   * (c) Fabien Potencier
   7   * (c) 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  namespace Twig\TokenParser;
  14  
  15  use Twig\Error\SyntaxError;
  16  use Twig\Node\Node;
  17  use Twig\Token;
  18  
  19  /**
  20   * Extends a template by another one.
  21   *
  22   *  {% extends "base.html" %}
  23   *
  24   * @final
  25   */
  26  class ExtendsTokenParser extends AbstractTokenParser
  27  {
  28      public function parse(Token $token)
  29      {
  30          $stream = $this->parser->getStream();
  31  
  32          if ($this->parser->peekBlockStack()) {
  33              throw new SyntaxError('Cannot use "extend" in a block.', $token->getLine(), $stream->getSourceContext());
  34          } elseif (!$this->parser->isMainScope()) {
  35              throw new SyntaxError('Cannot use "extend" in a macro.', $token->getLine(), $stream->getSourceContext());
  36          }
  37  
  38          if (null !== $this->parser->getParent()) {
  39              throw new SyntaxError('Multiple extends tags are forbidden.', $token->getLine(), $stream->getSourceContext());
  40          }
  41          $this->parser->setParent($this->parser->getExpressionParser()->parseExpression());
  42  
  43          $stream->expect(Token::BLOCK_END_TYPE);
  44  
  45          return new Node();
  46      }
  47  
  48      public function getTag()
  49      {
  50          return 'extends';
  51      }
  52  }
  53  
  54  class_alias('Twig\TokenParser\ExtendsTokenParser', 'Twig_TokenParser_Extends');