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TokenParser
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ExtendsTokenParser.php
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<?php /* * This file is part of Twig. * * (c) Fabien Potencier * (c) Armin Ronacher * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Twig\TokenParser; use Twig\Error\SyntaxError; use Twig\Node\Node; use Twig\Token; /** * Extends a template by another one. * * {% extends "base.html" %} * * @internal */ final class ExtendsTokenParser extends AbstractTokenParser { public function parse(Token $token): Node { $stream = $this->parser->getStream(); if ($this->parser->peekBlockStack()) { throw new SyntaxError('Cannot use "extend" in a block.', $token->getLine(), $stream->getSourceContext()); } elseif (!$this->parser->isMainScope()) { throw new SyntaxError('Cannot use "extend" in a macro.', $token->getLine(), $stream->getSourceContext()); } if (null !== $this->parser->getParent()) { throw new SyntaxError('Multiple extends tags are forbidden.', $token->getLine(), $stream->getSourceContext()); } $this->parser->setParent($this->parser->getExpressionParser()->parseExpression()); $stream->expect(/* Token::BLOCK_END_TYPE */ 3); return new Node(); } public function getTag(): string { return 'extends'; } }