NamedCapturing.scala

import scala.util.matching.Regex

object NamedCapturing {
  val namedCapture = """\((\?<(.+?)>)(.+?)\)""".r

  def regex(path: String) : Regex = {
    val (r, names) = parse((path, Array[String]()))
    new Regex(r, names: _*)
  }

  def parse(params: (String, Array[String])) : (String, Array[String]) = {
    val path = params._1
    namedCapture.findFirstMatchIn(path) match {
      case Some(m) => {
        val capture = m.group(1)
        val name = m.group(2)
        return parse((path.replace(capture, ""), params._2 ++ Array(name)))
      }
      case _ => return params
    }
  }
}

val re = NamedCapturing.regex("""(?<top>\d{3})-(?<down>\d{4})""")
re.findAllIn("123-4567").matchData.foreach { m =>
  println("%s-%s".format(m.group("top"), m.group("down")))
}