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name : TransChoiceTokenParser.php
 <?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bridge\Twig\TokenParser;

use Symfony\Bridge\Twig\Node\TransNode;

/**
 * Token Parser for the 'transchoice' tag.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class TransChoiceTokenParser extends TransTokenParser
{
    /**
     * Parses a token and returns a node.
     *
     * @param \Twig_Token $token A Twig_Token instance
     *
     * @return \Twig_NodeInterface A Twig_NodeInterface instance
     *
     * @throws \Twig_Error_Syntax
     */
    public function parse(\Twig_Token $token)
    {
        $lineno = $token->getLine();
        $stream = $this->parser->getStream();

        $vars = new \Twig_Node_Expression_Array(array(), $lineno);

        $count = $this->parser->getExpressionParser()->parseExpression();

        $domain = null;
        $locale = null;

        if ($stream->test('with')) {
            // {% transchoice count with vars %}
            $stream->next();
            $vars = $this->parser->getExpressionParser()->parseExpression();
        }

        if ($stream->test('from')) {
            // {% transchoice count from "messages" %}
            $stream->next();
            $domain = $this->parser->getExpressionParser()->parseExpression();
        }

        if ($stream->test('into')) {
            // {% transchoice count into "fr" %}
            $stream->next();
            $locale =  $this->parser->getExpressionParser()->parseExpression();
        }

        $stream->expect(\Twig_Token::BLOCK_END_TYPE);

        $body = $this->parser->subparse(array($this, 'decideTransChoiceFork'), true);

        if (!$body instanceof \Twig_Node_Text && !$body instanceof \Twig_Node_Expression) {
            throw new \Twig_Error_Syntax('A message inside a transchoice tag must be a simple text.', $body->getLine(), $stream->getFilename());
        }

        $stream->expect(\Twig_Token::BLOCK_END_TYPE);

        return new TransNode($body, $domain, $count, $vars, $locale, $lineno, $this->getTag());
    }

    public function decideTransChoiceFork($token)
    {
        return $token->test(array('endtranschoice'));
    }

    /**
     * Gets the tag name associated with this token parser.
     *
     * @return string The tag name
     */
    public function getTag()
    {
        return 'transchoice';
    }
}
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