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kotlinlang

If I have List&lt;Int&gt; and there will be no nulls inside it, is there way that interface in framework will be [NSNumber]?

<@U3SRWNXQB> If kotlin code have field List&lt;Int&gt;?, then it is compiled to [MyLibInt] in framework. I want that it will compile to [NSNumber] like in kn0.7

MyLibInt extends MyLibNumber, which extend NSNumber

&gt; MyLibInt extends MyLibNumber, which extend NSNumber

Exactly. And this means that you can apply to `[MyLibInt]` any operation that is allowed for `[NSNumber]`. So what’s the reason to have `[NSNumber]` instead of `[MyLibInt]`?

I can't cast [Uint8] to [MyLibInt], but I could cast [Uint8] to [NSNumber]

Now only way is to convert each element one by one with numericCast

Hm.. will it work, if i specify type as List&lt;UInt&gt;?  That will work for me.

If it is `var`, then it is incorrect to translate it as `[NSNumber]`, because otherwise it would be possible to pass e.g. list of `Double` instead of list of `Int`, and Swift compiler wouldn’t help to prevent this.

E.g.
```
// Kotlin
var list: List&lt;Int&gt; = emptyList()
```

```
// Swift
Kotlin.list = [0.5]
```

I tried to do it in constructor(myfield: List&lt;Int&gt;?), and it still converted to [MyLibInt]

Exactly, because otherwise it would be possible to pass list of doubles to this constructor, and this is incorrect.

Is there any way to make constructor parameter look like [UInt8] to swift side?