How can I tell cppCheck to NOT treat a function as an allocation function?

Question

I've got a codebase using Qt that I want run cppCheck on, and I'd like to make it run reasonably clean (suppress or fix most of the errors).

I have this function addResultLable:

QLabel * TestScreen::addResultLabel(const QString& labelText, int x, int y)
{
    QLabel *pLabel = new QLabel(baseFrame);
    pLabel->setText(labelText);
    pLabel->setGeometry(x, y, TEST_RESULT_WIDTH, TEST_RESULT_HEIGHT);
    pLabel->setAlignment(Qt::AlignCenter);
    return pLabel;
}

And I call it thusly: addResultLabel("Packets", TEST_RESULT_OFFSET, nextY); nextY += TEST_RESULT_HEIGHT; m_packets = addResultLabel("0", TEST_RESULT_OFFSET, nextY);

cppCheck comes up with the (error) Return value of allocation function addResultLabel is not stored. on that first call.

While true, it's not relevant: the QLabel is linked properly to it's parent in the new QLabel(baseFrame) call, so it doesn't actually matter if the caller of addResultLabel keeps it or not. There's a number of these calls, and I don't want to supress at each call site.

What I would like to do is tell cppCheck that addResultLabel is in fact NOT an allocation function, so that it stops checking it's callers.

I've hunted through the manual, and while I can see how to ADD a new allocation function, I can't see how to tell cppCheck NOT to treat a function as an allocation function.

Answer 1

I am a Cppcheck developer.

That is a false positive. It should be fixed in Cppcheck.

I created a ticket about it in the Cppcheck issue tracker: http://trac.cppcheck.net/ticket/6775