I am failing to address what seems to be a basic e...

# multiplatform

[Maksym M.]

I am failing to address what seems to be a basic example
Here's my commonMain definition and implementation of certain interface

fun interface EffectContainer {
    fun effects(): Set<Effect>
}

class RootEffectContainer : EffectContainer {
    override fun effects() = emptySet<Effect>()
}

I am trying to create an instance of a RooEffectContainer from Swift in iosMain and get the error

Type 'any Effect' does not conform to protocol 'Hashable'

From a quick lookup there doesn't seem to be a simple solution to what seems to an extremely basic use case.
What am I missing? Is there a quick way to enable the protocol Hashable for Kotlin interface? Is there a way to mitigate this issue?

[Chrimaeon]

Searching in this channel can help:
https://kotlinlang.slack.com/archives/C3PQML5NU/p1644822793211849

[Maksym M.]

That thread is over 3 years old, I did read through it, my question is whether this basic use case still hasn't been addressed

[Chrimaeon]

I guess it cannot be address by the nature how swift `Set`s are defined.

[Maksym M.]

And on the same note I wonder what searching this channel can help with, the thread ends with OP saying nothing they tried works.
I am not sure about the tone of your message too, do you mean it in a way that I shouldn't ask questions like that?
Why can't I get the benefit of a doubt that did look through the channel?
I am obviously new to multiplatform (and for a good reason, one can't afford to waste their time on half baked demos) and within 30 minutes of setting up a project I am running into a problem that seems extremely basic.
Google search doesn't list anything useful so I come into this slack workspace (dedicated to Kotlin) to ask a question about Kotlin.
I obviously went and looked through the history, as well as having been through that thread already through Google search.
I guess one must look up that 2022 thread and just decide to wait 3 more years instead of asking a question here?

[Maksym M.]

I guess it cannot be address by the nature how swift `Set`s are defined.

I can understand this, I am just wondering if there is any interop that doesn't involve creating a ton of wrappers

[Maksym M.]

As it seems that any time you want to use a data structure like Set to hold interfaces you will run into it

[Chrimaeon]

Exactly.