A Swift macro to generate a copy of the enum with no associated values.
import WithValueless
@WithValueless
indirect enum Unit {
case ton, kilogram, gram
case kilometer, meter, decimeter, centimeter
case currency(code: String)
case derived(Unit, power: Int)
case derived(Unit, by: Unit)
case custom(String)
}
// Expands:
enum ValuelessUnit {
case ton, kilogram, gram
case kilometer, meter, decimeter, centimeter
case currencyCodeString
case derivedUnitPowerInt
case derivedUnitByUnit
case customString
}MIT.