* {% block head %}
*
* {% block title %}{% endblock %} - My Webpage
* {% endblock %}
*
*/
class Twig_TokenParser_Block extends Twig_TokenParser
{
/**
* Parses a token and returns a node.
*
* @param Twig_Token $token A Twig_Token instance
*
* @return Twig_NodeInterface A Twig_NodeInterface instance
*/
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($name)) {
throw new Twig_Error_Syntax("The block '$name' has already been defined", $lineno);
}
$this->parser->pushLocalScope();
$this->parser->pushBlockStack($name);
if ($stream->test(Twig_Token::BLOCK_END_TYPE)) {
$stream->next();
$body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
if ($stream->test(Twig_Token::NAME_TYPE)) {
$value = $stream->next()->getValue();
if ($value != $name) {
throw new Twig_Error_Syntax(sprintf("Expected endblock for block '$name' (but %s given)", $value), $lineno);
}
}
} else {
$body = new Twig_Node(array(
new Twig_Node_Print($this->parser->getExpressionParser()->parseExpression(), $lineno),
));
}
$stream->expect(Twig_Token::BLOCK_END_TYPE);
$block = new Twig_Node_Block($name, $body, $lineno);
$this->parser->setBlock($name, $block);
$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');
}
/**
* Gets the tag name associated with this token parser.
*
* @return string The tag name
*/
public function getTag()
{
return 'block';
}
}