vendor/twig/twig/lib/Twig/Node/Expression/Test/Null.php

   1 <?php
   2
   3 /*
   4  * This file is part of Twig.
   5  *
   6  * (c) Fabien Potencier
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 /**
  13  * Checks that a variable is null.
  14  *
  15  * <pre>
  16  *  {{ var is none }}
  17  * </pre>
  18  *
  19  * @author Fabien Potencier <fabien@symfony.com>
  20  */
  21 class Twig_Node_Expression_Test_Null extends Twig_Node_Expression_Test
  22 {
  23     public function compile(Twig_Compiler $compiler)
  24     {
  25         $compiler
  26             ->raw('(null === ')
  27             ->subcompile($this->getNode('node'))
  28             ->raw(')')
  29         ;
  30     }
  31 }
  32
  33 class_alias('Twig_Node_Expression_Test_Null', 'Twig\Node\Expression\Test\NullTest', false);