Enum set

enumset.swift

struct EnumSet<T: RawRepresentable & CaseIterable>: OptionSet where T.RawValue == Int {
    let rawValue: T.RawValue

    init(rawValue: T.RawValue) {
        self.rawValue = rawValue
    }

    init(_ value: T) {
        self.rawValue = 1 << value.rawValue
    }

    var values: [T] {
        T.allCases.filter(self.contains)
    }

    func contains(_ member: T) -> Bool {
        self.contains(.init(member))
    }

    @discardableResult
    mutating func insert(_ newMember: T) -> Bool {
        self.insert(.init(newMember)).inserted
    }

    @discardableResult
    mutating func remove(_ member: T) -> Bool {
        self.remove(.init(member)) != nil
    }
}