Description

In our application we rely Symfony's ContainerBuilder::registerAttributeForAutoconfiguration together with auto wire for a lot of things. I also helped improving it:

• [DependencyInjection] Autoconfigurable attributes on methods, properties and parameters #42039

But now I have an issue. I have a class that has a private constructor. It needs to be constructed by calling a static method.
Example:

#[SomeAttribute]
final class SomeService
{
    private function __construct() {}
}

I have a compiler pass that tries to work this class by looking for SomeAttribute:

$container->registerAttributeForAutoconfiguration(
    SomeAttribute::class,
    static function (ChildDefinition $definition, SomeAttribute $attribute, ReflectionClass $reflector) : void {
        // do magic
    },
);

I load everything using:

$services->load('App\\', __DIR__ . '/');

Because of this line the class is never loaded because it's not instantiable.

Possible solutions:

1. Always run the registered attributes configurators for classes that cannot be instantiated
2. Allow an additional option on the PrototypeConfigurator to indicate you want to always load attributes
3. Change the condition above:

   - if ($r->isInstantiable() || $r->isInterface()) {
   -    $classes[$class] = null;
   - }
   + $classes[$class] = null;

/cc @nicolas-grekas since we worked in this area together in #42039 do you have ideas?

Example

No response