[Qt-interest] QList: Force a deep copy?

[Diego Schulz]

On Mon, Jun 29, 2009 at 8:10 PM, Scott Aron
Bloom<Scott.Bloom at sabgroup.com> wrote:
> But to answer Eric's original question :)  It should be.. If you are at
> QList, there really is no obvious way to know or learn about detach via
> the docs.
>
> I would file a bug in the documentation...
> Scott
>

I think there might be good reasons for not including a reference to
detach() in the QList documentation.
But admittedly, I'm not sure.

Looking at src/corelib/tools/qlist.h  (HEAD
@fbfa69a5f71a415dfa9673a6325e0fc0023a2389)

---snip---snip---
 66    ...
 67         QBasicAtomicInt ref;
 68         int alloc, begin, end;
 69         uint sharable : 1;
 70         void *array[1];
 71     };
 72     enum { DataHeaderSize = sizeof(Data) - sizeof(void *) };
 73
 74     Data *detach(); // remove in 5.0                <<<<<< look at this
 75     Data *detach2();
 76     void realloc(int alloc);
 77     static Data shared_null;
 78     Data *d;
 79     void **erase(void **xi);
 80     void **append();
 81     ...
--- snip --- snip ---


Naive cuestion.. in which circumstances it is necesary to make a deep
copy of an instance of an implicitly shared class?

regards,

diego