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- 27.04.2026
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AbstractNodeVisitor.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 namespace Twig\NodeVisitor;
13
14 use Twig\Environment;
15 use Twig\Node\Node;
16
17 /**
18 * Used to make node visitors compatible with Twig 1.x and 2.x.
19 *
20 * To be removed in Twig 3.1.
21 *
22 * @author Fabien Potencier <fabien@symfony.com>
23 */
24 abstract class AbstractNodeVisitor implements NodeVisitorInterface
25 {
26 final public function enterNode(Node $node, Environment $env)
27 {
28 return $this->doEnterNode($node, $env);
29 }
30
31 final public function leaveNode(Node $node, Environment $env)
32 {
33 return $this->doLeaveNode($node, $env);
34 }
35
36 /**
37 * Called before child nodes are visited.
38 *
39 * @return Node The modified node
40 */
41 abstract protected function doEnterNode(Node $node, Environment $env);
42
43 /**
44 * Called after child nodes are visited.
45 *
46 * @return Node|null The modified node or null if the node must be removed
47 */
48 abstract protected function doLeaveNode(Node $node, Environment $env);
49 }
50
51 class_alias('Twig\NodeVisitor\AbstractNodeVisitor', 'Twig_BaseNodeVisitor');
52