<Cloning object of subclass type in Kotlin> I want...

# stackoverflow

[user]

Cloning object of subclass type in Kotlin
I wanted to be able to define a method to clone an object that is the same type of itself. I define the interface requesting such, but the following does not compile or run.
interface Foo {
fun copy() : T
}

class Bar(private val v:Int) : Foo {
override fun copy():Bar = Bar(v)
}

main() {
val bar1 = Bar(1)
val bar2 = bar1.copy()
}

If however I write the implementing class in Java, it will compile
class Bar implements Foo {
private int v;
public Bar(int v) {this.v = v;}

public...