Generic interfaces.md

Generic interfaces

Generic interfaces are not supported.

Explanations

Let's describe an interface with a Kotlin generic:

interface SocketConverter<T : Any> {  
    fun convert(element: String): T  
}

When interopping, information about the generic on this interface is lost, this can be seen from .h the file:

__attribute__((swift_name("SocketConverter")))
@protocol SharedSocketConverter
@required
- (id)convertElement:(NSString *)element __attribute__((swift_name("convert(element:)")));
@end

But generics are not yet supported on interfaces. In Swift itself, you can create a protocol with a generic parameter.

---

Table of contents