http://hseeberger.github.io/blog/2013/10/04/name-based-extractors-in-scala-2-dot-11/

gistfile1.scala

sealed trait NameOpt extends Any {
  def isEmpty: Boolean
  def get: (String, String)
}

object NameOpt {

  object Empty extends NameOpt {
    def isEmpty: Boolean =
      true
    def get: (String, String) =
      throw new UnsupportedOperationException("Method get not defined for NameOpt.Empty!")
  }

  class FirstLast(val parts: (String, String)) extends AnyVal with NameOpt {
    def isEmpty: Boolean =
      false
    def get: (String, String) =
      parts
  }
}

object Name {
  def unapply(name: String): NameOpt = {
    val parts = name split " "
    if (parts.length == 2)
      new NameOpt.FirstLast((parts(0), parts(1)))
    else
      NameOpt.Empty
  }
}

class NameOpt2(val parts: Array[String]) extends AnyVal with NameOpt {
  def isEmpty: Boolean =
    parts.length != 2
  def get: (String, String) =
      (parts(0), parts(1))
}

object Name2 {
  def unapply(name: String): NameOpt2 = {
    val parts = name split " "
    new NameOpt2(parts)
  }
}

object App {
  def a() = {
  List("First", "First Last") map (_ match {
	  case Name(f, l) =>
		println(f + "/" + l)
	  case v =>
		println(v)
	})
  }
  def b() = {
	List("First", "First Last") map (_ match {
	  case Name2(f, l) =>
		println(f + "/" + l)
	  case v =>
		println(v)
	})
  }

  def main(args: Array[String]) {
	a()
	b()
  }
}