DIP60: @nogc attribute

[Kapps via Digitalmars-d]

On Tuesday, 22 April 2014 at 17:22:21 UTC, Ola Fosheim Grøstad
wrote:
> On Tuesday, 22 April 2014 at 16:58:23 UTC, Kapps wrote:
>> iOS now on 64-bit processors doesn't necessarily use a 
>> hashtable
>> for refcounting. Basically, only 33 bits of the 64-bit pointer
>> are used to actually refer to an address, then 19 of the
>> remaining bits are used to store an inline reference count.
>
> I am sure you are right, but how does that work? Do you have a 
> link?

https://www.mikeash.com/pyblog/friday-qa-2013-09-27-arm64-and-you.html
Ctrl +F "Repurposed isa Pointer"

Details about isa structure:
http://www.sealiesoftware.com/blog/archive/2013/09/24/objc_explain_Non-pointer_isa.html