Hello mates, while using Kotlin Multiplatform I ca...

# kotlin-native

[y9san9]

Hello mates, while using Kotlin Multiplatform I came across a following issue in Swift.

In kotlin we have awesome feature like Nothing type, I was trynna use it with generics in entity like Either.

sealed interface Either<out TLeft, out TRight> {
    class Failure<T>(...) : Either<T, Nothing>
    class Success<T>(...) : Result<Nothing, T>
    
}

This is cool approach in Kotlin and everything works fine:

val result: Either<Entity, Error> = result as Success<Entity>

BUT in swift I can't do stuff like this:

guard let result: Either<Entity, Error> = result as? Success<Entity> else { return }

This will break at runtime, since swift generics aren't erased, and it won't pass type check (Nothing != Error). Any ideas how to workaround it?

cc @alex009

[y9san9]

The real example is slightly different and you can check it here: https://github.com/icerockdev/moko-mvvm/pull/152