Declaring self-referencing pointers in Swift

Question

What would be the equivalent in swift of this Obj-C code?

I'm guessing something with CMutableVoidPointer

static void *CapturingStillImageContext = &CapturingStillImageContext;

score 3 · Answer 1 · answered Jul 08 '14 at 09:46

3

CMutableVoidPointer isn't available anymore as of Beta 3. Theres UnsafePointer and ConstUnsafePointer - you can declare it this way:

let CapturingStillImageContext = UnsafePointer<()>()

answered Jul 08 '14 at 09:46

artey

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That answers it, many thanks. – meshking999 Jul 08 '14 at 10:12
2

This would simply create a nil pointer - but not a pointer initialized with a unique value. – CouchDeveloper Jul 23 '14 at 06:25

score 1 · Accepted Answer · answered Jul 08 '14 at 18:50

1

Probably something like this:

var CapturingStillImageContext: COpaquePointer = nil
withUnsafePointer(&CapturingStillImageContext) {
    CapturingStillImageContext = COpaquePointer($0) }

answered Jul 08 '14 at 18:50

newacct

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score 0 · Answer 3 · answered May 29 '15 at 17:57

I've been using this technique, but it would be nice to find a more elegant solution:

var SelfReferencingKey = initialize_SelfReferencingKey()

func initialize_SelfReferencingKey() -> UnsafePointer<()> {
    return withUnsafePointer(&SelfReferencingKey, { UnsafePointer($0) } )
}

Declaring self-referencing pointers in Swift

3 Answers3

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