[Development] QValidator in QtCore

[André Pönitz]

On Mon, Sep 23, 2013 at 08:33:23AM -0700, Thiago Macieira wrote:
> On segunda-feira, 23 de setembro de 2013 16:36:43, Olivier Goffart wrote:
> > The solution would have to have forward declaration header that forward
> > declares all the classes.  Then we would forbid forward declaration of
> > Qt classes.  Let a few versions for users to adapt.  And then we can
> > allow changes that break forward declaration.
> 
> You may provide this header in Qt 5. We could even tell people that it's
> the correct way of forward-declaring classes in Qt 5.
> 
> But we must not break source compatibility until Qt 6. Then we will
> simply have to choose whether we want to introduce that potentially
> widespread break in Qt 6.
> 
> An alternative and limited-impact change is to do that only for the
> template classes.

I am generally not a big fan of "useless" includes, but an interesting, and
argably positive, side-effect of having the forwarding headers for all
classes is that it would remove some of the ugliness of writing "namespace
aware" code. 

Andre'