[swift-users] How to create an uninitialized pointer in Swift 3

[Martin R]

In Swift 3, COpaquePointer was renamed to OpaquePointer, and nullable pointers are represented by optionals:

  SE-0055 – Make unsafe pointer nullability explicit using Optional
  https://github.com/apple/swift-evolution/blob/master/proposals/0055-optional-unsafe-pointers.md

So the following should work in Swift 3:

  var cublasHandle: OpaquePointer?
  let status = cublasCreate_v2(&cublasHandle)

Martin

> On 15 Sep 2016, at 23:38, Lane Schwartz via swift-users <swift-users at swift.org> wrote:
> 
> In Swift 2.2, I could do the following:
> 
> var cublasHandle : COpaquePointer = nil
> let status = cublasCreate_v2(&cublasHandle)
> 
> Where cublasCreate_v2 is a C function that takes a pointer, and then initializes some memory at that address.
> 
> I haven't been able to figure out an equivalent in Swift 3. Any suggestions, especially to documentation, would be greatly appreciated.
> 
> Thanks,
> Lane
> 
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