QUrl non-class type

[Woomla]

Compiling ok:
@QUrl u;
u.setHost("127.0.0.1");@

@QUrl u("");
u.setHost("127.0.0.1");@

Compile error:
@QUrl u();
u.setHost("127.0.0.1");@

request for member 'setHost' in 'u', which is of non-class type 'QUrl()'

What is wrong with this?

[sierdzio]

Syntax is incorrect. This should not work for all C++ classes, not only Qt classes.

You need to use the parentheses only when you specify any arguments do an assignment like this:
@
QUrl u;
...
u = QUrl();
@