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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\BlockNode; use Twig\Node\BlockReferenceNode; use Twig\Node\EmptyNode; use Twig\Node\Node; use Twig\Node\Nodes; use Twig\Node\PrintNode; use Twig\Token; /** * Marks a section of a template as being reusable. * * {% block head %} * <link rel="stylesheet" href="style.css" /> * <title>{% block title %}{% endblock %} - My Webpage</title> * {% endblock %} * * @internal */ final class BlockTokenParser extends AbstractTokenParser { public function parse(Token $token): Node { $lineno = $token->getLine(); $stream = $this->parser->getStream(); $name = $stream->expect(Token::NAME_TYPE)->getValue(); $this->parser->setBlock($name, $block = new BlockNode($name, new EmptyNode(), $lineno)); $this->parser->pushLocalScope(); $this->parser->pushBlockStack($name); if ($stream->nextIf(Token::BLOCK_END_TYPE)) { $body = $this->parser->subparse([$this, 'decideBlockEnd'], true); if ($token = $stream->nextIf(Token::NAME_TYPE)) { $value = $token->getValue(); if ($value != $name) { throw new SyntaxError(\sprintf('Expected endblock for block "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext()); } } } else { $body = new Nodes([ new PrintNode($this->parser->getExpressionParser()->parseExpression(), $lineno), ]); } $stream->expect(Token::BLOCK_END_TYPE); $block->setNode('body', $body); $this->parser->popBlockStack(); $this->parser->popLocalScope(); return new BlockReferenceNode($name, $lineno); } public function decideBlockEnd(Token $token): bool { return $token->test('endblock'); } public function getTag(): string { return 'block'; } }
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