> On Jul 4, 2016, at 13:32, Kyle Jessup via swift-dev <swift-dev@swift.org>
> wrote:
>
> I have this code which uses Unmanaged and the API seems to vary depending on
> if I am using a 3.0 Preview or a development snapshot. I see it now when
> trying the June 13th/27th preview vs June 20th snapshot.
>
> class MyClass {}
>
> let holderObject = MyClass()
>
> #if FLIP // works with PREVIEW
> let leakyObject = UnsafeMutablePointer<Void>(OpaquePointer(bitPattern:
> Unmanaged.passRetained(holderObject)))
> #else // works with SNAPSHOT
> let leakyObject = Unmanaged.passRetained(holderObject).toOpaque()
> #endif
>
> #if FLIP // works with PREVIEW
> let unleakyObject =
> Unmanaged<MyClass>.fromOpaque(OpaquePointer(leakyObject)).takeRetainedValue()
> #else // works with SNAPSHOT
> let unleakyObject =
> Unmanaged<MyClass>.fromOpaque(leakyObject).takeRetainedValue()
> #endif
>
> I see the same difference between the previous snapshots and previews all the
> way back to the “false” preview of yore.
>
> Am I misunderstanding something about the API or is this a bug?
We just didn’t manage to get SE-0017
<https://github.com/apple/swift-evolution/blob/master/proposals/0017-convert-unmanaged-to-use-unsafepointer.md>
in before the first preview. The development branch (your SNAPSHOT) is the one
that will match the final Swift 3.
Jordan
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