[Qt-interest] buggy QDomElement

[Thiago Macieira]

Em Segunda-feira 04 Maio 2009, às 21:16:40, Pascal Patry escreveu:
> This piece of code fails in Qt 4.5.x:
>
> ====
> QDomElement elem;
> QString tag = "test";
> elem.setTagName(tag);
> assert(elem.tagName() == tag);
> assert(elem.nodeName() == tag);
> ====
>
> This used to work prior to Qt 4.5.

No, it didn't:

$ ldd ./domtest | grep QtXml
        libQtXml.so.4 => /home/tmacieir/obj/troll/qt-4.4.0/lib/libQtXml.so.4 
(0xb805d000)
$ ./domtest
domtest: /tmp/domtest/main.cpp:9: int main(): Assertion `elem.tagName() == 
tag' failed.
zsh: abort      ./domtest

$ ldd ./domtest | grep QtXml
        libQtXml.so.4 => /home/tmacieir/obj/troll/qt-4.3.5/lib/libQtXml.so.4 
(0xb8037000)
$ ./domtest
domtest: /tmp/domtest/main.cpp:9: int main(): Assertion `elem.tagName() == 
tag' failed.
zsh: abort      ./domtest


> The documentation states:
> "[...]
>  QDomElement::QDomElement ()
>
>   Constructs an empty element. Use the QDomDocument::createElement()
> function to construct elements with content.
> [...]"

It's working exactly as described by the documentation you quoted:
- If you create a QDomElement on the stack like you did, it's empty (forever)
- If you want to have elements with content, you have to use createElement().

-- 
Thiago Macieira - thiago.macieira (AT) nokia.com
  Senior Product Manager - Nokia, Qt Software
     Sandakerveien 116, NO-0402 Oslo, Norway
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