60 lines
2.1 KiB
PHP
60 lines
2.1 KiB
PHP
|
<?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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if a variable is defined in the current context.
|
||
|
|
*
|
||
|
|
* <pre>
|
||
|
|
* {# defined works with variable names and variable attributes #}
|
||
|
|
* {% if foo is defined %}
|
||
|
|
* {# ... #}
|
||
|
|
* {% endif %}
|
||
|
|
* </pre>
|
||
|
|
*
|
||
|
|
* @author Fabien Potencier <fabien@symfony.com>
|
||
|
|
*/
|
||
|
|
class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
|
||
|
|
{
|
||
|
|
public function __construct(Twig_Node $node, $name, Twig_Node $arguments = null, $lineno)
|
||
|
|
{
|
||
|
|
if ($node instanceof Twig_Node_Expression_Name) {
|
||
|
|
$node->setAttribute('is_defined_test', true);
|
||
|
|
} elseif ($node instanceof Twig_Node_Expression_GetAttr) {
|
||
|
|
$node->setAttribute('is_defined_test', true);
|
||
|
|
$this->changeIgnoreStrictCheck($node);
|
||
|
|
} elseif ($node instanceof Twig_Node_Expression_BlockReference) {
|
||
|
|
$node->setAttribute('is_defined_test', true);
|
||
|
|
} elseif ($node instanceof Twig_Node_Expression_Function && 'constant' === $node->getAttribute('name')) {
|
||
|
|
$node->setAttribute('is_defined_test', true);
|
||
|
|
} elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
|
||
|
|
$node = new Twig_Node_Expression_Constant(true, $node->getTemplateLine());
|
||
|
|
} else {
|
||
|
|
throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getTemplateLine());
|
||
|
|
}
|
||
|
|
|
||
|
|
parent::__construct($node, $name, $arguments, $lineno);
|
||
|
|
}
|
||
|
|
|
||
|
|
private function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
|
||
|
|
{
|
||
|
|
$node->setAttribute('ignore_strict_check', true);
|
||
|
|
|
||
|
|
if ($node->getNode('node') instanceof Twig_Node_Expression_GetAttr) {
|
||
|
|
$this->changeIgnoreStrictCheck($node->getNode('node'));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public function compile(Twig_Compiler $compiler)
|
||
|
|
{
|
||
|
|
$compiler->subcompile($this->getNode('node'));
|
||
|
|
}
|
||
|
|
}
|