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object Test extends App {
def unreachable1(xs:Seq[Char]) = xs match {
case Seq(x, y, _*) => x::y::Nil
case Seq(x, y, z, w) => List(z,w) // redundant!
}
def unreachable2(xs:Seq[Char]) = xs match {
case Seq(x, y, _*) => x::y::Nil
case Seq(x, y) => List(x, y)
}
def not_unreachable(xs:Seq[Char]) = xs match {
case Seq(x, y, _*) => x::y::Nil
case Seq(x) => List(x)
}
def not_unreachable2(xs:Seq[Char]) = xs match {
case Seq(x, y) => x::y::Nil
case Seq(x, y, z, _*) => List(x,y)
}
}
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