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import collection.generic.RowFactory
class Meter(val unbox: Double) extends AnyVal with Boxed[Double] with Printable {
def + (other: Meter): Meter =
new Meter(this.unbox + other.unbox)
def / (other: Meter): Double = this.unbox / other.unbox
def / (factor: Double): Meter = new Meter(this.unbox / factor)
def < (other: Meter): Boolean = this.unbox < other.unbox
override def toString: String = unbox.toString+"m"
}
object Meter extends RowFactory[Double, Meter] {
def apply(x: Double): Meter = new Meter(x)
}
trait Printable extends Any { def print: Unit = Console.print(this) }
object Test extends App {
{
val x: Meter = new Meter(1)
val a: Object = x.asInstanceOf[Object]
val y: Meter = a.asInstanceOf[Meter]
val u: Double = 1
val b: Object = u.asInstanceOf[Object]
val v: Double = b.asInstanceOf[Double]
}
val x = new Meter(1)
val y = x
println((x + x) / x)
println((x + x) / 0.5)
println((x < x).toString)
println("x.isInstanceOf[Meter]: "+x.isInstanceOf[Meter])
println("x.hashCode: "+x.hashCode)
println("x == 1: "+(x == 1))
println("x == y: "+(x == y))
assert(x.hashCode == (1.0).hashCode)
val a: Any = x
val b: Any = y
println("a == b: "+(a == b))
{ println("testing native arrays")
val arr = Array(x, y + x)
println(arr.deep)
def foo[T <: Printable](x: Array[T]) {
for (i <- 0 until x.length) { x(i).print; println(" "+x(i)) }
}
val m = arr(0)
println(m)
foo(arr)
}
{ println("testing wrapped arrays")
val arr = Meter.Row(x, y + x)
println(arr)
def foo(x: Meter.Row) {
for (i <- 0 until x.length) { x(i).print; println(" "+x(i)) }
}
val m = arr(0)
println(m)
foo(arr)
}
}
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