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object Test {
abstract class A1
case class C1(x: Int) extends A1
class C2(x: Int) extends C1(x) {
override def productPrefix = "Shazbot!"
}
class C3(x: Int) extends C1(x) {
override def canEqual(other: Any) = other.isInstanceOf[C3]
override def equals(other: Any) = other match {
case ob: C3 => x == ob.x
case _ => false
}
}
case class CS1(xs: Any*)
class CS2(xs: Seq[_]*) extends CS1(xs: _*)
class CS3(xs: IndexedSeq[Int]*) extends CS2(xs: _*)
case class H1(x: Int, y: Double)
class H2(x: Double, y: Int) extends H1(y, x)
def main(args: Array[String]): Unit = {
assert(C1(5) == new C2(5))
assert(new C2(5) == C1(5))
assert(C1(5).hashCode == new C2(5).hashCode)
assert(new C2(5).hashCode == C1(5).hashCode)
assert(C1(5) != new C3(5))
assert(new C3(5) != C1(5))
assert(CS1(List(1d,2d), Seq[Float](3f, 4f)) == new CS3(IndexedSeq(1,2), IndexedSeq(3, 4)))
assert(H1(5, 10d) == new H2(10d, 5))
assert(H1(5, 10d).hashCode == new H2(10d, 5).hashCode)
}
}
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