Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Defined.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) 2011 Fabien Potencier
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 /**
13 * Checks if a variable is defined in the current context.
14 *
15 * <pre>
16 * {# defined works with variable names and variable attributes #}
17 * {% if foo is defined %}
18 * {# ... #}
19 * {% endif %}
20 * </pre>
21 *
22 * @author Fabien Potencier <fabien@symfony.com>
23 */
24 class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
25 {
26 public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
27 {
28 if ($node instanceof Twig_Node_Expression_Name) {
29 $node->setAttribute('is_defined_test', true);
30 } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
31 $node->setAttribute('is_defined_test', true);
32
33 $this->changeIgnoreStrictCheck($node);
34 } elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
35 $node = new Twig_Node_Expression_Constant(true, $node->getLine());
36 } else {
37 throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getLine());
38 }
39
40 parent::__construct($node, $name, $arguments, $lineno);
41 }
42
43 protected function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
44 {
45 $node->setAttribute('ignore_strict_check', true);
46
47 if ($node->getNode('node') instanceof Twig_Node_Expression_GetAttr) {
48 $this->changeIgnoreStrictCheck($node->getNode('node'));
49 }
50 }
51
52 public function compile(Twig_Compiler $compiler)
53 {
54 $compiler->subcompile($this->getNode('node'));
55 }
56 }
57