<?php

/*

 * This file is part of Twig.

 *

 * (c) 2009 Fabien Potencier

 * (c) 2009 Armin Ronacher

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

class Twig_Node_Expression_Name extends Twig_Node_Expression

{

    public function __construct($name, $lineno)

    {

        parent::__construct(array(), array('name' => $name), $lineno);

    }

    public function compile(Twig_Compiler $compiler)

    {

        static $specialVars = array(

            '_self'    => '$this',

            '_context' => '$context',

            '_charset' => '$this->env->getCharset()',

        );

        $name = $this->getAttribute('name');

        if ($this->hasAttribute('is_defined_test')) {

            if (isset($specialVars[$name])) {

                $compiler->repr(true);

            } else {

                $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');

            }

        } elseif (isset($specialVars[$name])) {

            $compiler->raw($specialVars[$name]);

        } else {

            $compiler->raw(sprintf('$this->getContext($context, \'%s\')', $name));

        }

    }

}