> why this doesn't compile? `T::class` is of ty...

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[arekolek]

why this doesn't compile?

T::class is of type KClass<T : Foo>, and that is not a sealed class
Also, if you run:

val par: List<Foo> = listOf(Foo1(), Foo2())
test(par)

Then T is Foo so none of the branches in your when would be executed