[12.x] Set class-string generics on Enum rule

[cosmastech]

Adds class-string generics to the Enum rule. Will aid in static analysis.

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Dear Taylor,

Lord knows you don't want to see another typehint PR.

But me, and countless others, are slaves to PHPStan. It's not enough to have PHPStan as a part of the development process and let it guide me. No... it rules my life. Every commit I make is at the mercy of the PHPStan pipeline. If I don't keep PHPStan on level 7 satisfied, I fear my children will not eat. You can't fault a man for wanting to sustain his livelihood.

And sickest of all, perhaps, is that I'm the one who added PHPStan to our pipelines. But I digress.

I hope that you can sympathize with my plight and consider this humble PR. 🙏

Kind regards,
Luke

[Rizky92]

Dear god, I hope this gets merged.

So that we're not eternally fighting the demons inside static analytics

[shaedrich]

Wondering if this should be done like this 🤔

/*  * @template T of \UnitEnum  */ class Enum implements Rule, ValidatorAwareRule { use Conditionable; /**  * The type of the enum.  *  * @var class-string<T>  */ protected $type; // … /**  * Create a new rule instance.  *  * @param class-string<T> $type  */ public function __construct($type) { $this->type = $type; }

or even via constructor property promotion

class Enum implements Rule, ValidatorAwareRule { use Conditionable; // … /**  * Create a new rule instance.  *  * @template T of \UnitEnum  * @param class-string<T> $type  */ public function __construct(protected $type) { }

PS: You'd have good chances of winning "best PR description of the month" or so if there was such a thing 😂👍🏻