"Extension types" for Kotlin

[liufsd]

Also like this .

Extensions function to implement interface

Apples new Language Swift looks a lot like Kotlin and has a feature that would be really useful in Kotlin: The ability to extend a class to support an interface by adding extension methods.  The syntax for this could be (taken strait from Swift) trait Transformable {   fun <T> transformTo(type: Class<T>):T } extension String: Transformable {   override fun <T> transformTo(type: Class<T>): T{   when(type) {   javaClass<Boolean>() -> this.startsWith("T");   ...   }   } }