Considering : ```inline fun <T> List<T&gt...

# announcements

[Luke]

Considering :

inline fun <T> List<T>.applyOnEach(block: T.() -> Unit): List<T> = onEach { it?.block() }

Is there a way to mark the receiver in T.() -> Unit as not nullable?

[jw]

Bound the generic <T : Any>

[Luke]

But I want the elements to be nullable. Though I am not calling the block if the element is nullable. Actually, when call applyOnEach, the inferred type is nullable

[Zach Klippenstein (he/him) [MOD]]

fun <T : Any> List<T?>.applyOnEach(block: T.() -> Unit)

[Luke]

I did try something like that. Problem is that the return type must become nullable as well. So if I call the method with a list of not nullable, it returns a list of nullable regardless

[Zach Klippenstein (he/him) [MOD]]

Yea, unfortunately i don’t think there’s a way to express that

[molikuner]

A little hacky, but it works:

@JvmName("applyOnEachNullable")
fun <T : Any> List<T?>.applyOnEach(block: T.() -> Unit): List<T?> = onEach { it?.block() }
fun <T : Any> List<T>.applyOnEach(block: T.() -> Unit): List<T> = onEach { it.block() }

[Zach Klippenstein (he/him) [MOD]]

Neat!

[Luke]

That is what I ended up doing. Not exactly satisfied but I also think it’s the best I can do for now. Thank you