generics - Swift compiler crashes on switch statement, need workaround -


i've got code looks this, although i'm not sure distilled version reproduces compiler crash:

enum response<t> {     case success(t)     case failure(string) }  struct responsedata {     let somedata = "some data" }  func evaluate() {     let response = response.success(responsedata())      switch response {     case let .success(data):         println("got response \(data)")     case let .failure(reason):         println("got failure: \(reason)")     default: ()     } }

the xcode editor doesn't detect problems, when build, compiler crashes error:

command /applications/xcode.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/swiftc failed exit code 1

when comment out .success case, can build fine. i'm guessing swift compiler doesn't generics associated values enum. however, pattern extremely useful me, , makes code more readable. idea how can work around this? far can tell, there's no way access associated values except switch statement.

i should mention have found the question here, have not managed make use of solutions presented.

edit following throws seg-fault:

enum response<t> {     case success(t)     case failure(string) }  struct responsedata {     let somedata = "some data" }  func evaluate() {     let response = response.success(responsedata()) }

unimplemented ir generation feature non-fixed multi-payload enum layout enum response {

looks can use objects inherit nsobject

like this

enum result<t: nsobject>: printable {     case success(t)     case error(nserror)      var description: string {         switch self{         case .success(let obj):             return obj.description         case .error(let error):             return error.description     } }

and then

let r = result.success("xcode")  r.description

upd: can this

@objc protocol resultobjectprotocol {     var description: string { } }  extension nsdictionary: resultobjectprotocol {}  enum result<t: resultobjectprotocol>: printable {     case success(t)     case failure(nserror)      var description: string {         switch self{         case .success(let obj):             return obj.description         case .failure(let error):             return error.description         }     } }  let r = result.success(["d" : 132]).description

note: var description - example


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