[Development] QValidator in QtCore

[Thiago Macieira]

On domingo, 22 de setembro de 2013 23:28:48, Olivier Goffart wrote:
> On Saturday 21 September 2013 19:13:41 Thiago Macieira wrote:
> > On domingo, 22 de setembro de 2013 02:21:40, Konstantin Ritt wrote:
> > > I remember some classes were moved from QtXml to QtCore without breaking
> > > the compatibility. Am I wrong?
> > 
> > The moving did break compatibility. Which is why for Mac 32-bit builds,
> > the
> > classes aren't moved at all: we added new classes to QtCore and
> > typedef'ed.
> > 
> > That only broke source compatibility because you couldn't forward-declare
> > those classes.
> 
> The name change was done using #define QXmlStreamWriter QCoreXmlStreamWriter
> There is a comment saying it was done using typedef, but apparently it was
> not. http://code.woboq.org/kde/qt4/src/corelib/xml/qxmlstream.h.html So
> compatibility was not broken (but there was ugly macro)
> 
> I think this prove that this is possible.
> 
> (And for forward declaration, i think we should have header with them and
> forbid them)

Right now, we allow them and I don't like the idea of forbidding forward 
declarations.

Therefore, doing anything that breaks them is source-incompatible and should 
not be permitted until Qt 6.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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