Given a sealed class Foo and an instance of

val someClass: KClass<out Foo>

is it possible for

someClass.objectInstance

to be null? I think the answer is yes but I am struggling to come up with a way to make a test for such a thing. The documentation for objectInstance says, ” …if this class is not an object declaration” so my question really boils down to: how do I define a class that is not an object declaration? And the corollary, can I define a member of a sealed class that is not an object declaration. If you’re inclined to reply, please do so in a thread. Thanks. fwiw, my brain hurts just trying to grok this.

I have a guess that singleton declaration:

object Bar {
    // ...
}

is object declaration. And usual class declaration:

class Bar {
    // ...
}

is not.

@Pavlo Liapota your analysis makes sense to me but seems to be opposite to the documentation: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.reflect/-k-class/object-instance.html

Do you want to create a new instance by

KClass

using default constructor?

I know how to do this with the JVM but not with Native or JS. Being able to create a

KClass

instance multiplatform would be nice. If you know how to do that I am all eyes. 🙂