Hi I am testing generics support for Objective-C...

# multiplatform

[Liang Song]

Hi I am testing generics support for Objective-C/Swift in 1.3.40, I have two interfaces

interface CompletionHandler<T> {
    fun onCompletion(result: T)
    fun onException(exception: Exception)
}

interface TestGenerics {
    fun test(completionHandler: CompletionHandler<String>)
}

the signature of TestGenerics in the generated Objective-C header is

__attribute__((swift_name("TestGenerics")))
@protocol TMDTestGenerics
@required
- (void)testCompletionHandler:(id<TMDCompletionHandler>)completionHandler __attribute__((swift_name("test(completionHandler:)")));
@end;

Looks like it is still not supported

[basher]

Obj-C doesn't have support for generics in protocols

[basher]

In Obj-C, you can only have generic classes

[Liang Song]

Hi, yes you are right, if I change the CompletionHandler to a class,

typealias OnCompletion<T> = (result: T) -> Unit
typealias OnException = (exception: Exception) -> Unit
class CompletionHandler<T>(val onCompletion: OnCompletion<T>, val onException: OnException)

the signature of TestGenerics in the generated Objective-C header

__attribute__((swift_name("TestGenerics")))
@protocol TMDTestGenerics
@required
- (void)testCompletionHandler:(TMDCompletionHandler<NSString *> *)completionHandler __attribute__((swift_name("test(completionHandler:)")));
@end;

[ribesg]

Make sure you set the compiler parameter to enable generics