Open Radar

 
Summary:
It would be great if developers could easily create NS_OPTIONS equivalents in Swift. At the current moment, it is only opssible by creating a "struct : RawOptionSet" and the ading lots of boilerplate code, including overloaded bitwise operation functions and accessors.

Steps to Reproduce:


Expected Results:
Something relatively easy, line NS_OPTIONS in Objective-C.

Actual Results:
struct XYZOptions : RawOptionSet {

    var value: UInt = 0
    init(_ value: UInt) { self.value = value }

    func toRaw() -> UInt { return self.value }
    func getLogicValue() -> Bool { return self.value != 0 }

    static func fromRaw(raw: UInt) -> XYZOptions? { return XYZOptions(raw) }
    static func fromMask(raw: UInt) -> XYZOptions { return XYZOptions(raw) }
    
    static var None: XYZOptions          { return XYZOptions(0) }
    static var FirstOption: XYZOptions   { return XYZOptions(1 << 0) }
    static var SecondOption: XYZOptions  { return XYZOptions(1 << 1) }
    static var ThirdOption: XYZOptions   { return XYZOptions(1 << 2) }
}

func == (lhs: XYZOptions, rhs: XYZOptions) -> Bool { return lhs.value == rhs.value }

func | (lhs: XYZOptions, rhs: XYZOptions) -> XYZOptions { return XYZOptions(lhs.value | rhs.value) }
func & (lhs: XYZOptions, rhs: XYZOptions) -> XYZOptions { return XYZOptions(lhs.value & rhs.value) }
func ^ (lhs: XYZOptions, rhs: XYZOptions) -> XYZOptions { return XYZOptions(lhs.value ^ rhs.value) }

Version:
Feature is not yet implemented in iOS 8.0 SDK (12A4265u)

Notes:
My idea is to create a @bitmask attribute and somehow use it to denote a bitmask enum.

Idea #1:

@bitmask struct XYZOptions {
    static var OptionOne { return XYZOptions(1 << 0) }
    static var OptionTwo { return XYZOptions(1 << 1) }
}

Idea #2:

struct XYZOptions {
    @bitmask(1 << 0) static var OptionOne
    @bitmask(1 << 1) static var OptionTwo
}

Of course, these are only ideas. :)

Configuration:


Attachments:

--- 11-Jun-2014 01:25 AM

Engineering has determined that your bug report is a duplicate of another issue and will be closed. 15032042