Scala 3.0.0-M1(github.com)

    // Need to define this once somewhere in your project
    implicit class TrushExtension[A](anything: A) {
      def |>[B](function: A => B) = function(anything)
    }
    
    
    // Your application code
    def fun(arr: Iterable[Int]) = arr.map(_.toDouble / Math.PI)
    
    val arr = 0 to 100
    val newArr = arr.map(_*2) |> fun
    
    newArr.foreach(println)  // prints 0, 0.63662, 1.27324, ...

    val t1 = MyType()
    def fun(t: MyType, argument: Int) = argument

    // can't do this yet
    // t1.fun(42)
    
    // In Scala 2 you use an implicit class to add methods to a type
    implicit class MyEnrichedType(t: MyType) {
      def fun(argument: Int) = fun(t, argument)
    }

    // In Scala 3 you use an extension
    extension (t: MyType)
      def fun(argument: Int) = fun(t, argument)
    
    // now it can be done
    t.fun(42)