Scala Pattern Matching

patterns.sc

object patterns {
  abstract class Foo
  class Bar(val bar: Int) extends Foo
  class Baz(val baz: String) extends Foo

  def handle(f: Foo) =
    f match {
      case b: Bar => b.bar
      case b: Baz => b.baz
    }
  
  handle(new Bar(42))                       //> res0: Any = 42
  handle(new Baz("Luhrmann"))               //> res1: Any = Luhrmann
}