vendor/symfony/dependency-injection/Loader/Configurator/DefaultsConfigurator.php line 31
<?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\Loader\Configurator;use Symfony\Component\DependencyInjection\Definition;use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;/*** @author Nicolas Grekas <p@tchwork.com>*/class DefaultsConfigurator extends AbstractServiceConfigurator{use Traits\AutoconfigureTrait;use Traits\AutowireTrait;use Traits\BindTrait;use Traits\PublicTrait;public const FACTORY = 'defaults';private ?string $path;public function __construct(ServicesConfigurator $parent, Definition $definition, string $path = null){parent::__construct($parent, $definition, null, []);$this->path = $path;}/*** Adds a tag for this definition.** @return $this** @throws InvalidArgumentException when an invalid tag name or attribute is provided*/final public function tag(string $name, array $attributes = []): static{if ('' === $name) {throw new InvalidArgumentException('The tag name in "_defaults" must be a non-empty string.');}$this->validateAttributes($name, $attributes);$this->definition->addTag($name, $attributes);return $this;}/*** Defines an instanceof-conditional to be applied to following service definitions.*/final public function instanceof(string $fqcn): InstanceofConfigurator{return $this->parent->instanceof($fqcn);}private function validateAttributes(string $tag, array $attributes, array $path = []): void{foreach ($attributes as $name => $value) {if (\is_array($value)) {$this->validateAttributes($tag, $value, [...$path, $name]);} elseif (!\is_scalar($value ?? '')) {$name = implode('.', [...$path, $name]);throw new InvalidArgumentException(sprintf('Tag "%s", attribute "%s" in "_defaults" must be of a scalar-type or an array of scalar-type.', $tag, $name));}}}}