Scala example source code file (t0005.scala)

This example Scala source code file (t0005.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

a1, a2, array, array, b1, b2, int, int, some, test, test, x, x

The Scala t0005.scala source code

object A1 {
 object A2 {
   class X { def unapply(v : Int) = Some(v + 1) }
 }
}

object B1 {
  object B2 {
    val q = new A1.A2.X
  }
}

object Test {
  def main(args: Array[String]) {
    import B1.B2.q
    val res = 5 match { case q(x) => x }
    println(res)
  }
}



/*
compiler crash:

object A1 {
 object A2 {
   class X { def unapply(v : Int) = Some(v + 1) }
 }
}

object B1 {
  object B2 {
    val q = new A1.A2.X
  }
}

object C {
  def main(args: Array[String]) {
    //import B1.B2.q
    val q = new A1.A2.X
    val res = 5 match { case q(x) => x }
    println(res)
  }
}

*/