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sealed trait PowerSource
case object Petrol extends PowerSource
case object Pedal extends PowerSource
sealed abstract class Vehicle {
type A <: PowerSource
}
case object Bicycle extends Vehicle {
type A = Pedal.type
}
case class Bus(fuel: Int) extends Vehicle {
type A = Petrol.type
}
case class Car(fuel: Int) extends Vehicle {
type A = Petrol.type
}
class Test {
def refuel[P <: Petrol.type](vehicle: Vehicle {type A = P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
case Bus(_) => Bus(100)
}
def refuel2[P <: Petrol.type](vehicle: Vehicle {type A = P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
}
def foo1(vehicle: Vehicle {type A <: Petrol.type} ): Vehicle = vehicle match {
case Car(_) => Car(100)
case Bus(_) => Bus(100)
}
def foo2(vehicle: Vehicle {type A <: Petrol.type} ): Vehicle = vehicle match {
case Car(_) => Car(100)
}
type P = Petrol.type
def bar1(vehicle: Vehicle {type A <: P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
case Bus(_) => Bus(100)
}
def bar2(vehicle: Vehicle {type A <: P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
}
def qux1[P <: Petrol.type](vehicle: Vehicle {type A <: P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
case Bus(_) => Bus(100)
}
def qux2[P <: Petrol.type](vehicle: Vehicle {type A <: P} ): Vehicle = vehicle match {
case Car(_) => Car(100)
}
}
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