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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Twig_NodeVisitorInterface is the interface the all node visitor classes must implement.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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interface Twig_NodeVisitorInterface
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{
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/**
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* Called before child nodes are visited.
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*
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* @param Twig_NodeInterface $node The node to visit
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* @param Twig_Environment $env The Twig environment instance
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*
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* @return Twig_NodeInterface The modified node
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*/
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public function enterNode(Twig_NodeInterface $node, Twig_Environment $env);
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/**
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* Called after child nodes are visited.
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*
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* @param Twig_NodeInterface $node The node to visit
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* @param Twig_Environment $env The Twig environment instance
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*
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* @return Twig_NodeInterface|false The modified node or false if the node must be removed
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*/
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public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env);
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/**
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* Returns the priority for this visitor.
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*
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* Priority should be between -10 and 10 (0 is the default).
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*
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* @return int The priority level
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*/
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public function getPriority();
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}
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