Problems with KSharedConfig

[Christian Ehrlicher]

Hi,

There is a report on kde-windows that kdelibs is currently not 
compilable with msvc 7.1. After some investigation I found out why it 
works with msvc 2005, but I don't know exactly how the compiler comes to 
this conclusion.

The problem:
class KSharedConfig has no copy ctor, but is derived from KConfig with a 
private copy ctor.

now there is a template KSharedPtr<T>::detach() which applies to 
KSharedPtr<KSharedConfig>:

template <class T>
Q_INLINE_TEMPLATE void KSharedPtr<T>::detach()
{
     if (d && d->ref>1) {
         attach(new T(*d));
     }
}
--> (d == KSharedConfig*, so I'm writing '&KSharedConfig')

template <KSharedConfig>
Q_INLINE_TEMPLATE void KSharedPtr<KSharedConfig>::detach()
{
     if (&KSharedConfig && (&KSharedConfig)->ref>1) {
         attach(new KSharedConfig(KSharedConfig));
     }
}

which does not work because KConfig has a private copy ctor (at least 
this is what msvc7.1 tells us).

But when I look into the preprocessed source from msvc2005, I see that
"attach(new T(*d));" is completly optimized away ... !?
I'm now looking what gcc 3.4.x is doing :)

So my question is - what's the intended behaviour here?


Thx,
Christian

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 250 bytes
Desc: OpenPGP digital signature
URL: <http://mail.kde.org/pipermail/kde-core-devel/attachments/20070223/db76417c/attachment.sig>