What is the correct way of delegating when you have a composite interface? To give an example:

interface A
interface B
class ABImpl(concreteA: A): A by concreteA, B

now say I want a composite interface instead that encapsulates A & B

interface ABComposite: A, B

Then my ABImpl becomes

class ABImpl: ABComposite

If I want to delegate A only, but not B my solution was to do

class ABImpl(concreteA: A): ABComposite, A by concreteA

Is that the correct way? It just looks slightly odd, but if that’s how you do it all good 🙂

Should probably just not use the composite interface if you have the option