@nicolas-grekas on Twitter asked me to create RFC. And when Symfony core member makes a call, you answer that call 😄

Is it possible to have autowiring for Service Locator? Example:

interface CustomizedServiceNameInterface
{
    public static function getName(): string;
}

interface TagCollectionInterface
{
    public static function getTagName(): string;
}

Because components need custom name instead of FQCN, programmer has to implement interface (otherwise, it works as usual FQCN as name):

class HeaderComponent implements CustomizedServiceNameInterface, ComponentInterface
{
    public static function getName(): string
    {
        return 'header';
    }
}

so when I make class that implements TagCollectionInterface:

class MyCollectionOfTaggedServices extends ServiceLocator implements TagCollectionInterface
{
    public static function getTagName(): string
    {
        return ComponentInterface::class;
    }
}

$factories is populated as

array [
  HeaderComponent::getName() => new Reference(HeaderComponent::class),
 // just an example, I know these are callables
];

instead of

array [
  HeaderComponent::class => new Reference(HeaderComponent::class),
];

Right now I have to write a compiler pass:

It is pretty messy code, but the thing is that I make array of components where key is read from ComponentInterface::getName() static method. The rest (like $map variable) is irrelevant to Symfony.

Anyway, tell me what you think. This idea will be scraped, I have better idea now (using annotations on controller + kernel.view event), define route tree just like NG and it will be good to go. It will not change the speed but will clean the code.