Question regarding obj-c <-> swift interop. ...

# multiplatform

[Olenyov Kirill]

Question regarding obj-c <-> swift interop.
In K/N I created two methods:

fun test1(): List<Channel> {        
}

fun test2(): MWResponse<List<Channel>> {
}

Where Channel and MWResponse are just data and sealed classes.

In generated obj-c header I see:

- (NSArray<CommonChannel *> *)test1 attribute((swift_name("test1()")));
- (CommonMWResponse<NSArray<CommonChannel *> *> *)test2 attribute((swift_name("test2()")));

Looks good. “List<Channel>” was converted to obj-c “NSArray<Channel>”

But in Swift these methods shown as:

[Channel] test1()
MWResponse<NSArray> test2()

So two questions:
1) Why it has two different “array” types: [] and NSArray?
2) Where is generic type for test2() method? It should be NSArray<Channel> i think..

Is it a problem in objc-swift interop or mpp problem?

[Olenyov Kirill]

@akapanina Could anyone from JB see my question about generics in mpp?
I’m not sure that is K/N/mpp issue. Or maybe it is and I need to create an issue for mpp?

[Artyom Degtyarev [JB]]

Hello! Sorry for such a long silence. On a first sight, I agree that the second thing is incorrect a little bit. We are going to investigate it for some time, so please stay tuned for updates.

[Olenyov Kirill]

Ok, thanks!

[svyatoslav.scherbina]

This is generally how Swift -> Objective-C interoperability works. Likely has nothing to do with K/N directly.

[nrobi]

Any hope that this improves in the future? 😄