Em Terça-feira 01 Dezembro 2009, às 20:17:36, ext Uwe Rathmann escreveu: > Thiago Macieira wrote: > > We definitely do not export > > QList<double> template instantiations anywhere in Qt code. > > But Qwt does it - isn't this allowed ?
It is. But don't export it, like that line in qwt_valuelist.h does. > > Therefore, there is nothing we can do about this. > > This topic has already been discussed early 2007 with the (former) > TrollTech support with a different conclusion than yours. > > If you have archived all support requests you can find it by the key > "[Issue N150279] qHash(double key)" dated 12. Feb 2007. If not - these are > the last Issue N150279 resulted in task 150601: http://qt.nokia.com/developer/task-tracker/index_html?method=entry&id=150601 It was first Rejected, then we figured out that it worked with MinGW. In other words, this was never fixed, because it wasn't tested with VS. > Unfortunately I don't know if there has been an entry in your task tracker > to find out, what exactly had been done. But the problem was gone with Qt > 4.3. There was no code change. If it worked, it by pure chance. > > The line in qwt_valuelist.h seems wrong to me. > > Why ? > > This declaration is there since many years - what doesn't mean, that it has > to be correct, but at least it was no problem for many Qt releases. > > And it can't be the source for the problem of the code snippet Michael has > posted. I'm sorry, there's nothing we can do. We're not going to export ALL possible template instantiations of QList. -- Thiago Macieira - thiago.macieira (AT) nokia.com Senior Product Manager - Nokia, Qt Development Frameworks Sandakerveien 116, NO-0402 Oslo, Norway
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