Can we do this? sealed with value classes ```seale...

# getting-started

[Kshitij Patil]

Can we do this? sealed with value classes

sealed interface Color {
    @JvmInline
    value class StringColor(val value: String) : Color
	@JvmInline
    value class IntColor(val value: Int): Color
}

[Kshitij Patil]

Was trying to avoid boxing-unboxing. It appears sealed & value classes are negating each other and boxing happens nonetheless. So no point doing this it seems

Untitled

[Adam S]

Your code will work, but yes, autoboxing can always happen.

I really like this guide for explaining when autoboxing happens https://typealias.com/guides/inline-classes-and-autoboxing/

To best avoid autoboxing you'd want something like a single Color value class, but with multiple constructors for string/int values. But what you've written works fine too, and autoboxing is unlikely to be a big problem, so I'd be more cautious about preoptimising!

[Kshitij Patil]

But we’re not gaining anything with value class either

[Loney Chou]

https://youtrack.jetbrains.com/issue/KT-27576/Support-inline-sealed-classes