Does anyone know a fix for this? ```class ClassA<B: ClassB<*>> { } class ClassB<A: ...

# android

[Chetan Sachdeva]

Does anyone know a fix for this?

class ClassA<B: ClassB<*>> {

}

class ClassB<A: ClassA<*>> {

}

I’m getting an error: This type parameter violates the Finite Bound Restriction .

What am I doing wrong here?

[Chetan Sachdeva]

Basically something like following works in java but not in Koltin (where we need to add <*>):

class ClassA<B: ClassB> {}

class ClassB<A: ClassA> {}

[Vampire]

That works in Java because you use non-generic raw types.
The ClassA you use as type argument for ClassB has no type argument and the ClassB you use as type argument for ClassA has no type argument, so there are no problems.
With Kotlin raw types (which should not be used anyway) are right away not present.

[Vampire]

In Kotlin ClassA would need a type argument of ClassB which would need a type argument of ClassA which would need a type argument of ClassB, ...
I guess this cannot work out properly

[Chetan Sachdeva]

Thats legitimate. Thanks for answering @Vampire 🙂