Return type parameter count

typeParameterCount.kts

val Any.typeParameterCount: Int
  get() =
    when {
      this is Array<*> -> 1
      !javaClass.genericSuperclass.javaClass.kotlin.isSubclassOf(ParameterizedType::class) -> 0
      else -> (javaClass.genericSuperclass as ParameterizedType).actualTypeArguments.size
    }

4.typeParameterCount shouldEqual 0
"dd".typeParameterCount shouldEqual 0
listOf(3).typeParameterCount shouldEqual 1
mapOf(3 to "d").typeParameterCount shouldEqual 2
arrayOf(4).typeParameterCount shouldEqual 1
(IntArray(1) { 2 }).typeParameterCount shouldEqual 0