mtv\tags\Twig_TokenParser_While::parse PHP Method

    public function parse(\Twig_Token $token)
    {
        $lineno = $token->getLine();
        $expr = $this->parser->getExpressionParser()->parseExpression();
        $this->parser->getStream()->expect(\Twig_Token::BLOCK_END_TYPE);
        $body = $this->parser->subparse(array($this, 'decideIfEnd'));
        $tests = array($expr, $body);
        $else = null;
        $end = false;
        $next_val = $this->parser->getStream()->next()->getValue();
        while (!$end) {
            switch ($next_val) {
                case 'endwhile':
                    $end = true;
                    break;
                default:
                    throw new \Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for "endwhile" to close the "while" block started at line %d)', $lineno), -1);
            }
        }
        $this->parser->getStream()->expect(\Twig_Token::BLOCK_END_TYPE);
        return new Twig_Node_While(new \Twig_Node($tests), $else, $lineno, $this->getTag());
    }