ParseQuantityAcrossDimensions.scala

object Playground extends App {

  import squants._
  import squants.energy._

  def parse(s: String, i: Int): Option[Quantity[_]] =
    Seq(Energy, EnergyDensity, Power)
      .foldLeft(Option.empty[Quantity[_]]) {
        case (None, dimension)     => dimension.parseTuple((i,s)).toOption
        case (quantity@Some(_), _) => quantity
      }

  println(parse("kWh" , 100))
  println(parse("J/m³", 100))
  println(parse("GW"  , 100))
  println(parse("Au"  , 100))
}

Ah cool dat is natuurlijk ook een optie! (pun intended).