Scala example source code file (bug576.scala)

This example Scala source code file (bug576.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

a, a, any, any, array, array, dingus, dingus, iamdingus, list, test, unit

The Scala bug576.scala source code

class A {
  override def equals(other: Any) = other match {
    case _: this.type => true
    case _            => false
  }
}

object Dingus {
  def IamDingus = 5
}

object Test {
  val x1 = new A
  val x2 = new A
  
  val x3 = new { self =>
    override def equals(other : Any) = other match {
      case that: self.type    => true
      case _                  => false
    }
  }
  val x4 = new { self =>
    def f(x: Any) = x match {
      case _: x1.type     => 1
      case _: x2.type     => 2
      case _: x3.type     => 3
      case _: self.type   => 4
      case x: Dingus.type => x.IamDingus
    }
  }

  def main(args: Array[String]): Unit = {

    assert(x1 == x1)
    assert(x1 != x2)
    assert(x1 != ())
    assert(x2 != x1)
    
    assert(x3 == x3)
    assert(x3 != x2)
    assert(x2 != x3)
    
    List(x1, x2, x3, x4, Dingus) map x4.f foreach println
  }
}