Take for example interface delegation feature in K...

# language-proposals

[orangy]

Take for example interface delegation feature in Kotlin. I personally think it was a mistake to put it in a language, though it is extremely useful at times.

[Ruckus]

orangy: I can see that. I've used interface delegation very rarely (though the times I did it save me hundreds of LOC).

[Ruckus]

May I ask what about it you see as under developed?

[orangy]

Most of the time I need to get an instance interface was delegated to inside a class. Few times I needed to delegate an abstract class and not an interface.

[orangy]

Most simple case is when you want to delegate 99 methods as is, and only one do something before/after and still delegate. You can't

[orangy]

Well, you can if you are lucky enough to have delegate instance as primary constructor parameter.

[orangy]

See, so many “but”, not universally applicable to most common use cases, often needs “unwrapping” to manual delegation because of limitations.

[Ruckus]

Ah, I see. Delegating to abstract classes is something I've wanted for a while. It would help a ton with some GUI and game frameworks. I haven't yet needed to delegate to an instance inside the class, but I can definitely see how it would be useful conceptually.

[mg6maciej]

Inheritance is the root of all evil 🙂

[mg6maciej]

I like the way things work in Go in relation to delagation.

[cedric]

@mg6maciej Did you mean “Inheritance is the superclass of all evil”?