[DependencyInjection] PriorityTaggedServiceTrait does not discover decorated AsTaggedItem

[alex-dev]

Symfony version(s) affected

^5.3|^6.0|^7.0

Description

Creating decorator around a service with a AsTaggedItem attribute should not change the expected behaviour of any locator or iterator created from it.

How to reproduce

#[AutoconfigureTag('tag')]
interface Tagged {}

#[AsTaggedItem('a')]
class A implements Tagged {}

#[AsDecorator(A::class)]
class Decorator implements Tagged {}

class Test {
  public function __construct(#[TaggedLocator('tag')] ServiceProviderInterface $services) {
    $services->get('a');
  }
}

Possible Solution

• PriorityTaggedServiceTrait could unwrap services through container.decorator
• AsTaggedItem could be lifted as a tag that will then be cascaded to the decorator