CPS Exmaple Code in Scala

CPS

object ReadFileCPS {
    var fileName: String = "a.txt"
    var cont: (Unit => Unit) = null
    def capture = {
        shift { k: (Unit => Unit) => cont = k
        }
    }
    def readFailSafe {
        var contents: String = ""
        reset {
            try {
                contents = Source.fromFile(fileName).mkString
            } catch { case _: Throwable => }
            capture
            readFailSafe
            println("asafsdfas")
            println(contents)
        }
        if (contents == "") {
            println(s"the file ${fileName} doesn't exist" +
                "please try another file name")
            fileName = readLine()
            println("new file name " + fileName)
            cont()
        }
    }
}