Noob question about sealed classes usage, what am I missing here

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[Jukka Siivonen]

Noob question about sealed classes usage, what am I missing here

[Jukka Siivonen]

image.png

[thanksforallthefish]

it should be object Bar2 : Reason()

[Jukka Siivonen]

but then its not sub-type BarReason right?

[Rob Elliot]

Nested object isn't a subtype of the thing it's nested in. Bar1 has type BarReason.Bar1, which is not a subtype of BarReason.

[thanksforallthefish]

it is not a sub class of BarReason in your example though, is it?

val reason: BarReason = BarReason.Bar1 fails righ?

[thanksforallthefish]

sniped 😄

[Jukka Siivonen]

Yeah that is correct

[Vampire]

So make it object Bar2 : BarReason()

[Jukka Siivonen]

Yeah I think I got it

sealed class Reason
sealed class FooReason: Reason()
sealed class BarReason: Reason()

object Bar1: BarReason()

fun reason(reason: Reason) {
    when (reason) {
        is FooReason -> println("Foo reason" + reason)
        is BarReason -> println("Bar reason" + reason)
    }
}

class ReasonTest {
    fun test() {
        reason(Bar1)
    }
}

[Jukka Siivonen]

and when is exhaustive