Compat code for parallel collections across 2.10/2.11/2.12 and 2.13

build.properties

sbt.version=0.13.13

build.sbt

crossScalaVersions in ThisBuild := Seq("2.11.8", "2.12.1", "++2.13.0-pre-e2a2cba")

resolvers in ThisBuild += "scala-integration" at "https://scala-ci.typesafe.com/artifactory/scala-integration/"

scalaVersion in ThisBuild := "2.13.0-pre-e2a2cba"

libraryDependencies ++= {
  if (scalaVersion.value.startsWith("2.13."))
    Seq("org.scala-lang.modules" %% "scala-parallel-collections" % "0.1.1")
  else
    Seq()
}

CompatParColls.scala

package test

private[test] object CompatParColls {
  val Converters = {
    import Compat._

    {
      import scala.collection.parallel._

      CollectionConverters
    }
  }

  object Compat {
    object CollectionConverters
  }
}

Test.scala

package test

import test.CompatParColls.Converters._

object Main {
  def main(args: Array[String]): Unit = {
    val argsInt = args.par.map(_.toInt)
    argsInt.foreach(println(_))
  }
}