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<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig\NodeVisitor;
use Twig\Environment;
use Twig\Node\Node;
/**
* Interface for node visitor classes.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
interface NodeVisitorInterface
{
/**
* Called before child nodes are visited.
*
* @return Node The modified node
*/
public function enterNode(Node $node, Environment $env);
/**
* Called after child nodes are visited.
*
* @return Node|null The modified node or null if the node must be removed
*/
public function leaveNode(Node $node, Environment $env);
/**
* Returns the priority for this visitor.
*
* Priority should be between -10 and 10 (0 is the default).
*
* @return int The priority level
*/
public function getPriority();
}
class_alias('Twig\NodeVisitor\NodeVisitorInterface', 'Twig_NodeVisitorInterface');
// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
class_exists('Twig\Environment');