[Development] parented_ptr

[Ville Voutilainen]

On Fri, 7 Nov 2025 at 00:34, Ville Voutilainen
<ville.voutilainen at gmail.com> wrote:
>
> On Thu, 6 Nov 2025 at 16:39, Volker Hilsheimer <volker.hilsheimer at qt.io> wrote:
> > As the mailing list doesn’t make for a great code review experience: https://codereview.qt-project.org/c/qt/qtbase/+/689322
> >
> > Good catch with QWindow (and possibly other types for which we explictly overload setParent to require something else than QObject *); QGraphicsItem is not a QObject.
>
> I know that QGraphicsItem is not a QObjct, but previous descriptions
> of this function also didn't SFINAE away QObject-*non*-derivates. :D

..and to make it clearer what I mean, you can try to do

someQObject->makeChild<SomeGraphicsItem>();

and that won't compile, but you need to decide what quality of
diagnostic you want to give it.

And maybe QGraphicsItem should have its own makeChild(), too.