Is it possible to take in a lambda that is based a...

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[Allan Wang]

Is it possible to take in a lambda that is based around generics?

For example, can we simplify the following:

enum class Order {
   ASCENDING {
       override fun <T : Comparable<T>> sort(iterable: Iterable<T>): List<T> =
               iterable.sorted()
   }, DESCENDING {
       override fun <T : Comparable<T>> sort(iterable: Iterable<T>): List<T> =
               iterable.sortedDescending()
   };

   abstract fun <T : Comparable<T>> sort(iterable: Iterable<T>): List<T>
}

Such that it is something in the form of

enum class Order(...) {
  ASCENDING(::sorted), DESCENDING(::sortedDescending)
}

[Vladyslav Sitalo]

Look into https://kotlinlang.org/docs/reference/sealed-classes.html

[Allan Wang]

I've used sealed classes before, but I don't think that solves the problem of taking in a generic method where the generic is unrelated to the class

[Allan Wang]

The goal is to avoid something like class ASCENDING<T : Comparable<T>>(val sort: (Iterable<T>) -> List<T>)