How to cast `UnsafePointer<T>?` to `UnsafePointer<T?>`?

Using Swift
2

I am not sure here, and I learned that playing around with UnsafePointers in Playgrounds is a good way to lose all of your sandbox code.

If you change
pWaitSemaphores = UnsafePointer(waitSemaphores)
to
pWaitSemaphores = Optional<UnsafePointer>(waitSemaphores)
does that do what you want?

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