QUrl in KDE 4
frans.englich at telia.com
Fri May 20 15:55:03 BST 2005
On Friday 20 May 2005 08:17, christian.loose at hamburg.de wrote:
> -----Ursprüngliche Nachricht-----
> Von: jfirebaugh at kde.org
> Gesendet: Freitag, 20. Mai 2005 05:08
> An: kde-core-devel at kde.org
> Betreff: Re: QUrl in KDE 4
> > On May 19, 2005, at 7:02 PM, Frans Englich wrote:
> > > As Thiago, I disagree, because with that approach you will find the
> > > problem in
> > > any object oriented design; where something is a subset,
> > > constrainment, of
> > > something wider -- what class hierarchies usually are about,
> > > AFAICT. A square
> > > is a subset of the recangle's value space, so to speak.
> > [snip]
> > > Hence, I don't see representation problem Thiago sees. Perhaps an
> > > elaboration
> > > can be provided?
> > On the contrary, class hierarchies are ill suited to this type of
> > subset relationship:
> > Inheriting the other way around doesn't work either.
> > See also http://c2.com/cgi/wiki?CircleAndEllipseProblem
> > The URL/URI relationship is very similar.
> One can find another good explanation for this problem in the C++ FAQ Lite.
> See [21.6] till [21.12]:
Thanks for the links.
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