If class `Apple` extends class `Fruit`, how can I create a map like `mapOf<String,KClass<Fruit...

# reflect

[v79]

If class Apple extends class Fruit, how can I create a map like mapOf<String,KClass<Fruit>>("apple" to Apple) ?

[ephemient]

that would be a

Map<String, KClass<out Fruit>>

as KClass<T> is invariant

[v79]

Thank you. I knew I had done it somewhere before but it never really "sticks" with me.

[v79]

Harder question: given a function suspend inline fun <reified T : Fruit> eat(), how do I call something like

val food = mapOf<String, KClass<Fruit>>("apple" to Apple)
val apple = food["apple"]
eat<apple> // this bit I struggle!

[ephemient]

that's not possible - the type cannot be statically determined at compile time, which is necessary for <reified>

[ephemient]

non-reified fun <T : Fruit> eat(fruitClass: KClass<T>) would be callable, of course

[v79]

Oh. Much sadness. I'm trying to avoid a lot of duplication of code which is basically of the form:

when(food) {
  "org.me.apple" -> { eat<Apple>() }
  "org.me.pear" -> { eat<Pear>() }
}

[v79]

Except the functions are a bit more involved than just eat().

[Ayfri]

you can also use inline to be able to get the type