issues using intersperse in Scala 3

[philipschwarz]

See here. Thanks @smarter for diagnosing.

[smarter]

The issue isn't specific to intersperse, https://github.com/scala/scala-collection-contrib/blob/main/src/main/scala/scala/collection/decorators/package.scala defines various defs with the same name as the corresponding class in the same package, they all need to be renamed.

[julienrf]

Could you elaborate on the reasons to not support this in Scala 3?

I don’t think we can do this change in collection-contrib without breaking the binary compatibility, right?

[smarter]

Could you elaborate on the reasons to not support this in Scala 3?

See scala/scala3#7650 / scala/scala3#7652

I don’t think we can do this change in collection-contrib without breaking the binary compatibility, right?

Yep.

[philipschwarz]

FWIW, using Scalaz's intersperse is a workaround for what I was doing:

  def insertPaddingImage(images: List[List[Image]], paddingImage: Image): List[List[Image]] =
    import scalaz._, Scalaz._ // import scala.collection.decorators._
    images map (_ intersperse paddingImage) intersperse List(paddingImage)

[povder]

I believe this can be closed in favor of #166