Bottom type

Does Kotlin have a bottom type (subtype of anything) like Scala? If not, I suggest to introduce it.

With a bottom type it is possible to define methods that are compatible with any return type, like this short cut to express “not implemented yet”:

def doIt(): Something = ???

Whereas ??? is an method of the type Nothing (Scala bottom type), which throws an exception at runtime.

It's called Nothing in Kotlin as well.


Is it somewhere in the docs?