Handling for IterableView -> View

[tfenne]

Apologies if this is already handled somehow and I'm missing how to use the compat library to work around it.

I'm struggling to find a way to cross-build between 2.12 an 2.13 when using IterableView in 2.12 and View in 2.13, since neither trait exists in the other version. What I've ended up doing is creating 2.12 and 2.13 specific source trees and defined the following:

// In 2.12
trait CrossCompatView[A, Coll] extends scala.collection.IterableView[A, Coll] {
  def underlying: Coll = this.asInstanceOf[Coll]
}

// In 2.13
trait CrossCompatView[A, Coll] extends scala.collection.View[A]

It would be nice if the collection-compat library could remove the need for this, either by introducing View[A] in the 2.12 tree or adding back a deprecated IterableView[A, Coll] in the 2.13 tree.

[julienrf]

Would it work for you to add an alias like so on 2.12?

type View[+A] = IterableView[A, Seq] 

[tfenne]

I think that would probably also work ... would just require classes mixing in the trait to still implement he underlying method from IterableView to satisfy things under 2.12. But yes, that would largely work.