感叹标记在symfony配置文件中是如何工作的？

Question

举个例子:https://github.com/akeneo/pim-communite-dev/blob/master/src/akeneo/platform/bundle/uibundle/resources/config/services.yml#L84

Akeneo\Platform\Bundle\UIBundle\Provider\ExternalJavascriptDependenciesProvider:
    arguments:
        - !tagged akeneo.pim.security.external_dependency_provider

这是：https://github.com/akeneo/pim-communite-dev/blob/master/src/akeneo/platform/bundle/uibundle/provider/externalJavaScriptDependenciesProvider.php

php prettyprint-override">declare(strict_types=1);

namespace Akeneo\Platform\Bundle\UIBundle\Provider;

final class ExternalJavascriptDependenciesProvider
{
    private iterable $externalDependenciesProviders;

    public function __construct(iterable $externalDependenciesProviders)
    {
        $this->externalDependenciesProviders = $externalDependenciesProviders;
    }

    public function getScripts(): array
    {
        $dependencies = [];

        foreach ($this->externalDependenciesProviders as $externalDependenciesProvider) {
            $dependencies[] = $externalDependenciesProvider->getScript();
        }

        return $dependencies;
    }
}

因为构造函数接受一个iterable as参数，所以我理解它必须是一个所有服务都标记为akeneo.pim.security.external_dependency_provider的数组，但是我在任何地方都找不到关于它的文档。我可以在这里找到一些关于！tagged_iterator的文档:https://symfony.com/doc/current/service_container/tags.html#tagged-services-with-index，但它没有提到“！tagged”（没有_iterator后缀）

Answer 1

！tagged和！tagged_iterator是相同的。只是前者改名为后者而已。

参见https://github.com/symfony/symfony/issues/31289