I’ve added an extension function in Kotlin to an o...

# kotlin-native

[spierce7]

I’ve added an extension function in Kotlin to an objc framework. It’s showing up in Swift code though as a function that you have to pass an instance into. Here is the objc header:

__attribute__((objc_subclassing_restricted))
__attribute__((swift_name("RallyAbTestKt")))
@interface RATRallyAbTestKt : RATBase
+ (void)getExperimentGroup:(id<RATRallyAbTest>)receiver name:(NSString *)name callback:(void (^)(NSString *))callback __attribute__((swift_name("getExperimentGroup(_:name:callback:)")));
+ (void)doInit:(id<RATRallyAbTest>)receiver appName:(NSString *)appName userIdentifier:(NSString *)userIdentifier experiments:(NSArray<RATExperiment *> *)experiments mode:(RATAbTestMode *)mode callback:(void (^)(NSArray<RATExperimentGroup *> *))callback __attribute__((swift_name("doInit(_:appName:userIdentifier:experiments:mode:callback:)")));
@end;

The interop documentation shows that it should show up as an extension in Swift. Do I have to do something special to get that to work?

[basher]

is it an extension on a kotlin interface?

[spierce7]

its an extension on an interface

[basher]

Obj-C doesn't have a parallel concept

[basher]

Swift has protocol extensions

[basher]

Obj-C does not 😕

[spierce7]

I have an interface RallyAbTest, and I’m adding a platform specific init function for

[spierce7]

the documentation shows that the bridge shows them as extensions

[spierce7]

however - after reading the note, perhaps it only works from objc / Swift to Kotlin. Not vice versa

[basher]

yes, but part of all of that is the caveat about it only supports what Obj-C supports

[basher]

extensions work, but only extensions on classes

[basher]

since Obj-C supports that

[spierce7]

oh interesting.