relatively new to Kotlin, so apologies in advance ...

# compose

[Jamie]

relatively new to Kotlin, so apologies in advance if there's something dumb i'm missing 🙂

I'm currently experimenting with (Jetbrains) Compose and Decompose, and while I have a working implementation based on the Decompose samples, I'm wondering whether it's possible to use sealed classes as the exposed component value type as opposed to just a single data class as per the samples?

I've tried to update as expected but this falls apart when updating the component value as there's no copy() method or equivalent to replicate the samples when invoking value.reduce {}, and the widget doesn't recompose when the observed state value changes.

What am I missing?

EDIT: creating a wrapper data class to hold my sealed class did the trick to make it play nice, though very much open to suggestions if there's a better way to handle this!

DecomposeExample_kt

[Arkadii Ivanov]

Perhaps you need to write an exhaustive when first, check for all possible subtypes, and either create initial Loaded, or copy it.

[Zoltan Demant]

Isnt the problem that youre using .apply in your reduce function? That way youre basically updating the value, to the same value. If you use something like .run I believe the value will update to reflect the State.Loaded that youre specifying?

[Arkadii Ivanov]

That's definitely an issue too. From my point of none of them are actually needed here.

[Jamie]

yeah the Loaded, Loading and Error classes in the above example definitely aren't needed for the Counter example itself, but I figured the counter would serve as a simple reference to convey what I was trying to achieve.