When using Q_FUNC_INFO with qDebug() then it will be seen as invalid syntax in Qt Creator in some circumstances. The following:

void foo()
{
qDebug() << Q_FUNC_INFO " it was function description";
}

will be be seen as invalid. Whereas this:

void bar()
{
qDebug() << "It is function description: " Q_FUNC_INFO;
}

is fine.