[Development] QList

Thiago Macieira thiago.macieira at intel.com
Tue Apr 25 23:04:43 CEST 2017

On Tuesday, 25 April 2017 17:49:16 -03 Alejandro Exojo wrote:
> On Tuesday 25 April 2017 16:35:01 Thiago Macieira wrote:
> > QVector and QList don't have the same API. They're slightly different.
> > What'sm  ore, QList has a beginning-of-list optimisation, whereas QVector
> > doesn't (not even my copy, I stopped development shortly before I got to
> > that part, even if I did add a QArrayData::GrowsBackward flag to support
> > the case).
> > 
> >  (...)
> > 
> > So, no, we can't implement that in Qt 5. In Qt 6, we've already agreed we
> > don't want this mess, so QList as it is simply goes away.
> By the way, which is the exit strategy for QQueue? 

Do we need one?

The only reason that QQueue uses QList is because QList has that takeFirst() 
optimisation, while QVector does not. Once we implement that for QVector, we 
should be able to use QQueue with QVector too.

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

More information about the Development mailing list