Hi there. I am struggling a little with using the ...

# arrow

[Richard Schielek]

Hi there. I am struggling a little with using the Ior type.
Let's say I have some code that needs to be resilient but should log unexpected behavior:

fun foo(): Int {
    println("Something unexpected happened and I want to proceed")
    println("Another unexpected thing happened and I still want to proceed")
    return 42
}

I want my function to have no side-effects to be able to test it more thoroughly. Ior seems to be a perfect match, but I am quite unhappy how my code turns out.

fun foo2(): Ior<NonEmptyList<String>, Int> = iorNel {
    Ior.Both("Something unexpected happened but I still want to proceed".nel(), Unit).bind()
    Ior.Both("Another unexpected thing happened but I still want to proceed".nel(), Unit).bind()
    42
}

Is there a better way of writing this?

[Richard Schielek]

I mean I could introduce my own function:

@RaiseDSL
fun <E> IorRaise<NonEmptyList<E>>.raiseAndContinue(error: E) {
    Ior.Both(error.nel(), Unit).bind()
}

[Stylianos Gakis]

Perhaps looking for smth like this?
https://kotlinlang.slack.com/archives/C5UPMM0A0/p1726656862542009?thread_ts=1726656327.099039&cid=C5UPMM0A0

[Richard Schielek]

Yes, that's exactly what I am looking for. So I just need to wait for 2.0 to drop and polyfill it myself in the meantime. Thank you very much.

[Stylianos Gakis]

No problem 😊