vendor/symfony/dependency-injection/Compiler/ResolveReferencesToAliasesPass.php line 62
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\DependencyInjection\Compiler;use Symfony\Component\DependencyInjection\ContainerBuilder;use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;use Symfony\Component\DependencyInjection\Reference;/*** Replaces all references to aliases with references to the actual service.** @author Johannes M. Schmitt <schmittjoh@gmail.com>*/class ResolveReferencesToAliasesPass extends AbstractRecursivePass{public function process(ContainerBuilder $container){parent::process($container);foreach ($container->getAliases() as $id => $alias) {$aliasId = (string) $alias;$this->currentId = $id;if ($aliasId !== $defId = $this->getDefinitionId($aliasId, $container)) {$container->setAlias($id, $defId)->setPublic($alias->isPublic());}}}protected function processValue(mixed $value, bool $isRoot = false): mixed{if (!$value instanceof Reference) {return parent::processValue($value, $isRoot);}$defId = $this->getDefinitionId($id = (string) $value, $this->container);return $defId !== $id ? new Reference($defId, $value->getInvalidBehavior()) : $value;}private function getDefinitionId(string $id, ContainerBuilder $container): string{if (!$container->hasAlias($id)) {return $id;}$alias = $container->getAlias($id);if ($alias->isDeprecated()) {$referencingDefinition = $container->hasDefinition($this->currentId) ? $container->getDefinition($this->currentId) : $container->getAlias($this->currentId);if (!$referencingDefinition->isDeprecated()) {$deprecation = $alias->getDeprecation($id);trigger_deprecation($deprecation['package'], $deprecation['version'], rtrim($deprecation['message'], '. ').'. It is being referenced by the "%s" '.($container->hasDefinition($this->currentId) ? 'service.' : 'alias.'), $this->currentId);}}$seen = [];do {if (isset($seen[$id])) {throw new ServiceCircularReferenceException($id, array_merge(array_keys($seen), [$id]));}$seen[$id] = true;$id = (string) $container->getAlias($id);} while ($container->hasAlias($id));return $id;}}