4 * This file is part of Twig.
6 * (c) 2009 Fabien Potencier
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
13 * Twig_NodeVisitorInterface is the interface the all node visitor classes must implement.
15 * @author Fabien Potencier <fabien@symfony.com>
17 interface Twig_NodeVisitorInterface
20 * Called before child nodes are visited.
22 * @param Twig_NodeInterface $node The node to visit
23 * @param Twig_Environment $env The Twig environment instance
25 * @return Twig_NodeInterface The modified node
27 public function enterNode(Twig_NodeInterface
$node, Twig_Environment
$env);
30 * Called after child nodes are visited.
32 * @param Twig_NodeInterface $node The node to visit
33 * @param Twig_Environment $env The Twig environment instance
35 * @return Twig_NodeInterface|false The modified node or false if the node must be removed
37 public function leaveNode(Twig_NodeInterface
$node, Twig_Environment
$env);
40 * Returns the priority for this visitor.
42 * Priority should be between -10 and 10 (0 is the default).
44 * @return integer The priority level
46 public function getPriority();