[Development] QIntrusiveSharedPointer

[Mutz, Marc]

On 2019-08-07 23:09, Mutz, Marc via Development wrote:
[...]
> It also adds
> 
> - constexpr default ctor and ctor from nullptr
> - implicit ctor from nullptr (but explicit from T*)

- qintrusivesharedpointer.h doesn't transitively include the world

(I think I can even drop the <qatomic.h> and <qhashfunctions.h> - if we 
can depend on proper two-stage name lookup these days :)