Open Radar

 
Summary:
Using the latest Xcode8 beta6 SDK when bridging a Swift.Bool to AnyObject or to NSNumber (e.g. to be serialized by JSONSerialization), the Type information is lost and the Bool is serialized as an integer (0 or 1) instead of as a string ("true" or "false")

let bool = true                              // Bool.Type
let boolAsAnyObject = bool as AnyObject      // is bridged to _SwiftTypePreservingNSNumber.Type
let boolAsNSNumber = bool as NSNumber        // is bridged to _SwiftTypePreservingNSNumber.Type
let trueAsAnyObject = true as AnyObject      // is also bridged to _SwiftTypePreservingNSNumber.Type
let trueAsNSNumber = true as NSNumber        // is bridged to __NSCFBoolean.Type
let nsNumberFromBool = NSNumber(value: bool) // __NSCFBoolean.Type

Only __NSCFBoolean.Type seems to be correctly serialized by JSONSerialization as a string with "true" or "false"

See the attached Playground.

Steps to Reproduce:
Open attached Playground that shows the issue.

Expected Results:
JSONSerialization serializes Bool as string with "true" or "false"

Actual Results:
JSONSerialization serializes Bool as integer with 1 or 0

Version:
Version 8.0 beta 6 (8S201h)

Notes:


Configuration:


Attachments:
'BoolAsAnyObject.playground.zip' was successfully uploaded.