Swift C void* and void** pointers in latest betas (4)

Question

In previous betas, I was able to pass a pointer to anything to C doing something like this

var aString : NSString = "This is a string" // create an NSString
var anUnmanaged = Unmanaged.passUnretained(aString) // take an unmanaged pointer
var opaque : COpaquePointer = anUnmanaged.toOpaque() // convert it to a COpaquePointer
var mut : CMutablePointer = &opaque // this is a CMutablePointer
doSomething(mut) // pass the pointer to an helper function written in C

With the C function like this:

void doSomething(void ** ptr)
{
   // do something with the pointer, change it and make it point to another nsstring for example
}

Now, (for sure in Beta4, maybe even in Beta3) the syntax translated from C to Swift has changed

Before, the doSomething function was expecting a CMutablePointer (that now has been removed from Swift) Now, it expects a:

UnsafePointer<UnsafePointer<()>>

() is a typealias to Void

So, syntactically talking is more clear. However, Now I can't understand how to take the void** pointer of any object like I was doing in previous betas.

Any suggestion?

Answer 1

This worked for me:

var str = "Hello, playground"
var p: UnsafePointer<Void> = unsafeAddressOf(str)