scala> case class Bippy(x: Int)
defined class Bippy

scala> val x = Bippy(1)
x: Bippy = Bippy(1)

scala> $intp.showDirectory
repl-out-dir-run.obj
    $line1
        $eval$.class
        $eval.class
    $line2
        $eval$.class
        $eval.class
        $read$$iw$$iw$.class
        $read$$iw$.class
        $read$.class
        $read.class
    $line3
        $eval$.class
        $eval.class
        $read$$iw$$iw$.class
        $read$$iw$$iw$Bippy$.class
        $read$$iw$$iw$Bippy.class
        $read$$iw$.class
        $read$.class
        $read.class
    $line4
        $eval$.class
        $eval.class
        $read$$iw$$iw$.class
        $read$$iw$.class
        $read$.class
        $read.class
    $line5
        $eval$.class
        $eval.class
        $read$$iw$$iw$.class
        $read$$iw$.class
        $read$.class
        $read.class
    $repl_$init.class
    Test$.class
    Test.class

scala> :quit