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1 | <?php | |
2 | ||
3 | /* | |
4 | * This file is part of Twig. | |
5 | * | |
6 | * (c) 2009 Fabien Potencier | |
7 | * (c) 2009 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 | /** | |
14 | * Extends a template by another one. | |
15 | * | |
16 | * <pre> | |
17 | * {% extends "base.html" %} | |
18 | * </pre> | |
19 | */ | |
20 | class Twig_TokenParser_Extends extends Twig_TokenParser | |
21 | { | |
22 | /** | |
23 | * Parses a token and returns a node. | |
24 | * | |
25 | * @param Twig_Token $token A Twig_Token instance | |
26 | * | |
27 | * @return Twig_NodeInterface A Twig_NodeInterface instance | |
28 | */ | |
29 | public function parse(Twig_Token $token) | |
30 | { | |
31 | if (!$this->parser->isMainScope()) { | |
32 | throw new Twig_Error_Syntax('Cannot extend from a block', $token->getLine(), $this->parser->getFilename()); | |
33 | } | |
34 | ||
35 | if (null !== $this->parser->getParent()) { | |
36 | throw new Twig_Error_Syntax('Multiple extends tags are forbidden', $token->getLine(), $this->parser->getFilename()); | |
37 | } | |
38 | $this->parser->setParent($this->parser->getExpressionParser()->parseExpression()); | |
39 | ||
40 | $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE); | |
41 | } | |
42 | ||
43 | /** | |
44 | * Gets the tag name associated with this token parser. | |
45 | * | |
46 | * @return string The tag name | |
47 | */ | |
48 | public function getTag() | |
49 | { | |
50 | return 'extends'; | |
51 | } | |
52 | } |