Allow boolean function reference properties for NonBooleanPropertyPrefixedWithIs

[eygraber]

Since is prefix is used for functions that return a boolean, I think it would make sense to allow function references that return a boolean to be prefixed with is:

val isRemoved = suspend { theThing == null }
val isAdded = interactor::isAdded

[cortinico]

This sounds like a valid edge case to add to the rule 🤔 or maybe worth a local suppress. I'm not sure how fine grained the rule should behave (like understand if the functional type is returning Boolean or not).

[eygraber]

I use these a lot and I try to suppress as little as possible.

With type resolution, would the type of the reference be available? If so would it be simple to check if it is a function reference, and then check the return type parameter?

[BraisGabin]

#4684 fixed this

[eygraber]

Should this be extended to also allow AtomicBoolean to be prefixed with is?

[BraisGabin]

🤔 I don't think so. That seems like a edge case to me.