[reflection] How to get companion object and new instance from ::class via reflection?

1

 

class A{

  companion object{

  fun fn(){

          println(“A”)

  }

  }

}


class B{

  companion object{

  fun fn(){

          println(“B”)

  }

  }

}


fun invokeFnInCompanion(cl : KClass<*>){

  //???

}


fun invokeCtor<T>(cl : KClass<T>):T{

  //???

}


invokeFnInCompanion(A::class) // must print A

invokeFnInCompanion(B::class) // must print B

invokeCtor(A::class) // must return new instance A

invokeCtor(B::class) // must return new instance B


How to write body of invokeFnInCompanion?
How to write body of invokeCtor?

2
Companion object is a named object whose name is Companion. So, this will get a class reference to the companion object: A.Companion::class. In the same fashion, to get a function reference to fn you can write A.Companion::fn. New instance construction is not yet supported in Kotlin reflection.