--- /dev/null
+<?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.
+ */
+
+/**
+ * Marks a section of a template as being reusable.
+ *
+ * <pre>
+ * {% block head %}
+ * <link rel="stylesheet" href="style.css" />
+ * <title>{% block title %}{% endblock %} - My Webpage</title>
+ * {% endblock %}
+ * </pre>
+ *
+ * @final
+ */
+class Twig_TokenParser_Block extends Twig_TokenParser
+{
+ public function parse(Twig_Token $token)
+ {
+ $lineno = $token->getLine();
+ $stream = $this->parser->getStream();
+ $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+ if ($this->parser->hasBlock($name)) {
+ throw new Twig_Error_Syntax(sprintf("The block '%s' has already been defined line %d.", $name, $this->parser->getBlock($name)->getTemplateLine()), $stream->getCurrent()->getLine(), $stream->getSourceContext());
+ }
+ $this->parser->setBlock($name, $block = new Twig_Node_Block($name, new Twig_Node(array()), $lineno));
+ $this->parser->pushLocalScope();
+ $this->parser->pushBlockStack($name);
+
+ if ($stream->nextIf(Twig_Token::BLOCK_END_TYPE)) {
+ $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+ if ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) {
+ $value = $token->getValue();
+
+ if ($value != $name) {
+ throw new Twig_Error_Syntax(sprintf('Expected endblock for block "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext());
+ }
+ }
+ } else {
+ $body = new Twig_Node(array(
+ new Twig_Node_Print($this->parser->getExpressionParser()->parseExpression(), $lineno),
+ ));
+ }
+ $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+ $block->setNode('body', $body);
+ $this->parser->popBlockStack();
+ $this->parser->popLocalScope();
+
+ return new Twig_Node_BlockReference($name, $lineno, $this->getTag());
+ }
+
+ public function decideBlockEnd(Twig_Token $token)
+ {
+ return $token->test('endblock');
+ }
+
+ public function getTag()
+ {
+ return 'block';
+ }
+}