<?php

/*
 * This file is part of Twig.
 *
 * (c) 2012 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Twig_NodeVisitor_VariableAnalyzer references all variables used in a template.
 *
 * @package twig
 * @author  Fabien Potencier <fabien@symfony.com>
 */
class Twig_NodeVisitor_VariableAnalyzer implements Twig_NodeVisitorInterface
{
    /**
     * {@inheritdoc}
     */
    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
    {
        if ($node instanceof Twig_Node_Expression_Name) {
            print $node->getAttribute('name')."\n";
        }

        return $node;
    }

    /**
     * {@inheritdoc}
     */
    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
    {
        return $node;
    }

    /**
     * {@inheritdoc}
     */
    public function getPriority()
    {
        return 0;
    }
}