Scala example source code file (bug789.scala)

This example Scala source code file (bug789.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

both, colorimpl, colorimpl, impl, impl, mynode, mynode, sizeimpl, sizeimpl, unit

The Scala bug789.scala source code

object main { // don't do this at home

  trait Impl

  trait SizeImpl extends Impl { def size = 42 }

  trait ColorImpl extends Impl { def color = "red" }

  type Both = SizeImpl with ColorImpl

  def info(x:Impl) = x match {
    case x:Both      => "size  "+x.size+" color "+x.color // you wish
    case x:SizeImpl  => "size  "+x.size
    case x:ColorImpl => "color "+x.color
    case _           => "n.a."
  }

  def info2(x:Impl) = x match {
    case x:SizeImpl with ColorImpl  => "size  "+x.size+" color "+x.color // you wish
    case x:SizeImpl  => "size  "+x.size
    case x:ColorImpl => "color "+x.color
    case _           => "n.a."
  }


  def main(args:Array[String]): Unit = {
    // make up some class that has a size
    class MyNode extends SizeImpl
    Console.println("hello " + info(new MyNode))
    Console.println("hello " + info2(new MyNode))
  }
}