Arrow function is missing a return type hint + Parameter $item is missing a type hint

[ruudk]

When writing using arrow functions or normal inline functions, there is often no need to add a parameter type and/or return type, if the things that you work with are already typed.

Consider

array_map(fn($item) => new TransferReversal($item), $list);

Why would I want to bloat my code with types here if $list already is properly typed? PHPStorm and PHPStan understand this.

Since this is a linting error, I guess it does not look at types at all.

I think if this is a rule, it should be a analyze rule that will complain when the type is unknown.

[azjezz]

That's why we have an option to require it everywhere else, and ignore arrow functions :D

https://mago.carthage.software/tools/linter/rules/correctness#return-type

[linter.rules]
return-type = { ignore-arrow-function = true, ignore-closure = true }