Binary operator cannot be applied: NSCalendarUnit

let dateComponentsFormatter = NSDateComponentsFormatter()
dateComponentsFormatter.allowedUnits = [NSCalendarUnit.Day, NSCalendarUnit.Hour, NSCalendarUnit.Minute, NSCalendarUnit.Second]

http://adcdownload.apple.com/WWDC_2015/Xcode_7_beta/Xcode_7_beta_Release_Notes.pdf underSwift Language Changes

For the sake of future searchers, here's the relevant excerpt:

• NS_OPTIONS types get imported as conforming to the OptionSetType protocol, which presents a set-like interface for options. (18069205)

Instead of using bitwise operations such as:

// Swift 1.2:

object.invokeMethodWithOptions(.OptionA | .OptionB)

object.invokeMethodWithOptions(nil)

if options & .OptionC == .OptionC {

// .OptionC is set

}

Option sets support set literal syntax, and set-like methods such as contains: object.invokeMethodWithOptions([.OptionA, .OptionB])

object.invokeMethodWithOptions([])

if options.contains(.OptionC) {

// .OptionC is set

}

Or just

let dateComponentsFormatter = NSDateComponentsFormatter() 
dateComponentsFormatter.allowedUnits = [.Day, .Hour, .Minute, .Second]

since the enumeration type can be inferred from the context.