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kotlinlang

But that doesn't work for variables and for classes it exposes the generic parameter which I don't really want.

What about making a third interface that extends the first 2 ?

Problem is implmentors of classes `A` and `B` might not be aware that `C` exists.

That's the solution I'm using now, I'm hoping there's something better.

How do you initialize this variable?
Usually variable type can be inferred, so you don’t think about such things.

It would be set by a function that does use the generics trick.

kotlin doesn’t have intersection types. I think the limitations are the same as for java, where the generics trick also works.

Okay, just wanted to check. A possible solution is to just have two fields, one for each type.