Hi Quinn, Thanks for the reply,
It is an iOS Swift project (uses Foundation, UIKit, CloudKit and other native frameworks) in which I would like to check the memory address for debugging (and out of enthusiasm). There is no C code I am using. I have some asynchronous call back functions from CloudKit frameworks which return CKUserIdentity objects. So thought it would be nice if I could print the memory address of CKUserIdentity objects and to check if it was unique. And there are some other custom Swift Structs which I would like to know the memory address of. Thanks and regards, Muthu > On 12 Sep 2017, at 10:35 PM, Quinn The Eskimo! via swift-users > <swift-users@swift.org> wrote: > > > On 12 Sep 2017, at 13:44, somu subscribe via swift-users > <swift-users@swift.org> wrote: > >> 1. Is the above shown the correct way to get reference type memory address ? >> 2. What Is it the correct way to get value type memory address ? > > It’s hard to answer that without knowing how you’re intended to use these > techniques. If you can explain more about where you’re going with this, I > should be able to make some specific recommendations. > > For example, if you’re goal were to pass a Swift object to a C API that takes > a callback function pointer and a ‘cookie’ value, and hen calls that function > with that cookie (like the `qsort_r` function), the to/from opaque mechanism > provider by `Unmanaged` is the recommended way to pass a Swift object through > such a cookie value. > >> 3. Is it possible to get the memory address of immutable value type >> (declared as let) > > No, because such values don’t necessarily exist in memory. > > Share and Enjoy > -- > Quinn "The Eskimo!" <http://www.apple.com/developer/> > Apple Developer Relations, Developer Technical Support, Core OS/Hardware > > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
