Add error identifiers

[InvisibleSmiley]

Situation

I'm in a situation where I want to enable some/all checks this extension provides in general, but ignore specific cases.

Right now I can only use the old approach of either ignoring by regex via config or baseline, or add generic "ignore anything here" @phpstan-ignore-line/@phpstan-ignore-next-line comments.

What I want is to explicitly ignore a certain rule in specific places (see use case below).

For that I'd need support of error identifiers (e.g. type_perfect.narrow_return), cf.:
https://phpstan.org/blog/phpstan-1-11-errors-identifiers-phpstan-pro-reboot

Use Case

I have a class that has properties with mutable types (interfaces containing methods that allow object mutation).
On the same class I have methods that return these properties but use immutable return types (interfaces that do not advertise methods capable of object mutation). These cases are correctly detected by narrow_return but I want to ignore these specific cases.

[TomasVotruba]

Thanks for the suggestions. It looks good to me 👍 Could you send PR?

[InvisibleSmiley]

Could you send a PR?

I probably could but it's really not that hard given that you already require PHPStan ^1.11 (so error identifiers support is there and you don't need to support older versions that don't have it).

It's as simple as calling identifier('X') in the right places, cf.
https://phpstan.org/error-identifiers (includes links to PHPStan sources).