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<?php /* * This file is part of Twig. * * (c) Fabien Potencier * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Twig\Node\Expression\Test; use Twig\Attribute\FirstClassTwigCallableReady; use Twig\Compiler; use Twig\Error\SyntaxError; use Twig\Node\Expression\AbstractExpression; use Twig\Node\Expression\ArrayExpression; use Twig\Node\Expression\BlockReferenceExpression; use Twig\Node\Expression\ConstantExpression; use Twig\Node\Expression\FunctionExpression; use Twig\Node\Expression\GetAttrExpression; use Twig\Node\Expression\MacroReferenceExpression; use Twig\Node\Expression\MethodCallExpression; use Twig\Node\Expression\TestExpression; use Twig\Node\Expression\Variable\ContextVariable; use Twig\Node\Node; use Twig\TwigTest; /** * Checks if a variable is defined in the current context. * * {# defined works with variable names and variable attributes #} * {% if foo is defined %} * {# ... #} * {% endif %} * * @author Fabien Potencier <fabien@symfony.com> */ class DefinedTest extends TestExpression { /** * @param AbstractExpression $node */ #[FirstClassTwigCallableReady] public function __construct(Node $node, TwigTest|string $name, ?Node $arguments, int $lineno) { if (!$node instanceof AbstractExpression) { trigger_deprecation('twig/twig', '3.15', 'Not passing a "%s" instance to the "node" argument of "%s" is deprecated ("%s" given).', AbstractExpression::class, static::class, \get_class($node)); } if ($node instanceof ContextVariable) { $node->setAttribute('is_defined_test', true); } elseif ($node instanceof GetAttrExpression) { $node->setAttribute('is_defined_test', true); $this->changeIgnoreStrictCheck($node); } elseif ($node instanceof BlockReferenceExpression) { $node->setAttribute('is_defined_test', true); } elseif ($node instanceof MacroReferenceExpression) { $node->setAttribute('is_defined_test', true); } elseif ($node instanceof FunctionExpression && 'constant' === $node->getAttribute('name')) { $node->setAttribute('is_defined_test', true); } elseif ($node instanceof ConstantExpression || $node instanceof ArrayExpression) { $node = new ConstantExpression(true, $node->getTemplateLine()); } elseif ($node instanceof MethodCallExpression) { $node->setAttribute('is_defined_test', true); } else { throw new SyntaxError('The "defined" test only works with simple variables.', $lineno); } if (\is_string($name) && 'defined' !== $name) { trigger_deprecation('twig/twig', '3.12', 'Creating a "DefinedTest" instance with a test name that is not "defined" is deprecated.'); } parent::__construct($node, $name, $arguments, $lineno); } private function changeIgnoreStrictCheck(GetAttrExpression $node): void { $node->setAttribute('optimizable', false); $node->setAttribute('ignore_strict_check', true); if ($node->getNode('node') instanceof GetAttrExpression) { $this->changeIgnoreStrictCheck($node->getNode('node')); } } public function compile(Compiler $compiler): void { $compiler->subcompile($this->getNode('node')); } }
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