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