Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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BaseNodeVisitor.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) Fabien Potencier
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 /**
13 * Twig_BaseNodeVisitor can be used to make node visitors compatible with Twig 1.x and 2.x.
14 *
15 * @author Fabien Potencier <fabien@symfony.com>
16 */
17 abstract class Twig_BaseNodeVisitor implements Twig_NodeVisitorInterface
18 {
19 /**
20 * {@inheritdoc}
21 */
22 final public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
23 {
24 if (!$node instanceof Twig_Node) {
25 throw new LogicException('Twig_BaseNodeVisitor only supports Twig_Node instances.');
26 }
27
28 return $this->doEnterNode($node, $env);
29 }
30
31 /**
32 * {@inheritdoc}
33 */
34 final public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
35 {
36 if (!$node instanceof Twig_Node) {
37 throw new LogicException('Twig_BaseNodeVisitor only supports Twig_Node instances.');
38 }
39
40 return $this->doLeaveNode($node, $env);
41 }
42
43 /**
44 * Called before child nodes are visited.
45 *
46 * @param Twig_Node $node The node to visit
47 * @param Twig_Environment $env The Twig environment instance
48 *
49 * @return Twig_Node The modified node
50 */
51 abstract protected function doEnterNode(Twig_Node $node, Twig_Environment $env);
52
53 /**
54 * Called after child nodes are visited.
55 *
56 * @param Twig_Node $node The node to visit
57 * @param Twig_Environment $env The Twig environment instance
58 *
59 * @return Twig_Node|false The modified node or false if the node must be removed
60 */
61 abstract protected function doLeaveNode(Twig_Node $node, Twig_Environment $env);
62 }
63