@swift-6.0.3
@attached(member, names: named(RawValue), named(rawValue), named(`init`), arbitrary) @attached(extension, conformances: OptionSet) macro OptionSet<RawType>() = #externalMacro(module: "SwiftMacros", type: "OptionSetMacro") @OptionSet<Int> struct SundaeToppings { private enum Options: Int { case nuts case cherry case fudge } } print(SundaeToppings.nuts)