Objective-C

enum : NSUInteger {
    LCLoggerLevelNone = 0,
    LCLoggerLevelInfo = 1,
    LCLoggerLevelDebug = 1 << 1,
    LCLoggerLevelError = 1 << 2,
    LCLoggerLevelAll = LCLoggerLevelInfo | LCLoggerLevelDebug | LCLoggerLevelError,
}

Swift

struct LCLoggerLevel : Equatable, RawRepresentable