Does Kotlin Multiplatform support native generic t...

# multiplatform

[alex.hart]

Does Kotlin Multiplatform support native generic type parameters? Or are they stripped?

[Ruckus]

What do you mean by "native generic type parameters"?

[alex.hart]

Example, I’ve got a class:

public abstract class A<T> {
}

When I compile it and look at it’s declaration in the header, T is gone, and Swift will error if I try to create an A with a type parameter

[alex.hart]

I can see platform level classes have their type parameter specified, but I’m not sure why it is not generating this for my common module types.

[russhwolf]

Swift is not aware of Kotlin's generics because it passes through Objective-C which doesn't support them. But you should be able to use them in Kotlin/Native code running on iOS.

[alex.hart]

Got it. So are things like Kotlin collections etc. special cased? Because I see that they basically extend the corresponding NS* class and provide types to them. Example:

__attribute__((objc_runtime_name("KotlinMutableSet")))
__attribute__((swift_name("KotlinMutableSet")))
@interface SharedcodeMutableSet<ObjectType> : NSMutableSet<ObjectType>
@end;

[gildor]

Yes, collections have special handling of generics and you can use them from Swift

[alex.hart]

Ok, thanks for the input everyone 🙂