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kotlinlang

Hello!
```interface A {
    val x : Int
}

interface B : A {
    override val x: Int
        get() = 1
}

open class C(
    final override val x: Int
) : A

class D(
    x: Int
) : C(x), B // Error : Class 'D' must override public final val x: Int defined in C because it inherits many implementations of it
// but how to override if x is final in C ?```

I don't think you can. This looks like the classic "diamond of death" with the `final` disabling the workaround

&gt; ```how to override if x is final in C ```
You can't. `final` means "forbid overriding", so it's forbidden.

I thought Interface DEFAULT implementetion means applying it if  there is no class implementation even if class is super.

Yes. D has a super class, so C takes priority.

I also thought so. But it is not. I've got compilation error.