<?php
/*
* This file is part of Twig.
*
* (c) 2011 Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Returns the value or the default value when it is undefined or empty.
*
* <pre>
* {{ var.foo|default('foo item on var is not defined') }}
* </pre>
*
* @package twig
* @author Fabien Potencier <fabien@symfony.com>
*/
class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter
{
public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
{
$default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('_default', $node->getLine()), $arguments, $node->getLine());
if ('default' === $filterName->getAttribute('value') && ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr)) {
$test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node->getLine());
$false = count($arguments) ? $arguments->getNode(0) : new Twig_Node_Expression_Constant('', $node->getLine());
$node = new Twig_Node_Expression_Conditional($test, $default, $false, $node->getLine());
} else {
$node = $default;
}
parent::__construct($node, $filterName, $arguments, $lineno, $tag);
}
public function compile(Twig_Compiler $compiler)
{
$compiler->subcompile($this->getNode('node'));
}
}