Hey, anyone had an issue with `-Xobjc-generics` ? ...

# multiplatform

[nrobi]

Hey, anyone had an issue with -Xobjc-generics ? I’m getting Any? on iOS when I’m trying to consume some generics

[nrobi]

Here’s my setup

Untitled

[kpgalligan]

What’s the Kotlin side?

[nrobi]

what do you mean exactly?

[nrobi]

Untitled

[vanniktech]

This is desired behavior. Your generic in Kotlin needs to be T : Any since just T could be String? which can be null. I also got bitten by this

[vanniktech]

// T : Any so that Swift understands that T can never be null.
sealed class SuccessFailure<T : Any>

[nrobi]

Yes but my exact problem is, that I have an expected Observable<T>. And if I’m trying to observe an Observable<String> for example it cannot infer the type on iOS only Any?

[kpgalligan]

By “Kotlin side” I mean what dose your kotlin code look like. Not the gradle config

[kpgalligan]

What type is Observable?

[kpgalligan]

If it’s an interface, you can’t use generics on interfaces

[kpgalligan]

That and the nullability thing are a result of Objective-C generics limitations

[nrobi]

I see. Yes it's an interface

[nrobi]

Thanks