SwiftUI State

.alert(
  "Hello there!",
  isPresented: $alertIsVisible,
  presenting: {
    let roundedValue = Int(sliderValue.rounded())
    return (
      roundedValue,
      game.points(sliderValue: roundedValue)
    )
  } () as (roundedValue: Int, points: Int)
) { data in
  Button("Awesome!") {
    game.startNewRound(points: data.points)
  }
} message: { data in
  Text("The slider's value is \(data.roundedValue).\n" + "You scored \(data.points) points this round.")
}