Wonder how you deal with such scenario:

Promise { resolve, _ ->
  resolve("a string")
}.catch {
  12
}.then {
  val v: Int = it
  println(v) // Expected an Int, but a string is received
}

Sealed box class if you really must mix the types. Otherwise it's best to avoid mixing types in Promise

catch

call signature is invalid right now. We will try to fix it here (with other

Promise

problems). In described example second

then

will receive data with type

String | Int

.

@Big Chungus that's reasonable! Thanks. Although you know, it's something you need to be very careful about now. @turansky oh nice. Although how are you representing

String | Int

?

Any

?

Comparable<*>

expected

Thanks @turansky!

Implemented 😉 Expected in next release (probably tomorrow).

Thanks @turansky! Awesome!