error C3646: 'closure' : unknown override specifier

Question

I got the following error:

error C3646: 'closure' : unknown override specifier

The code:

void BaseOperator::mousebutton_cb(EventObject* sender, EventArgs* calldata, void* closure)
{
    xd3D::Operation::Operator::BaseOperator* operator = (xd3D::Operation::Operator::BaseOperator*)closure;
    MouseButtonEventArgs* e = (MouseButtonEventArgs*)calldata;
    if (e->Status == Down)
        operator->OnMouseButtonDown(e);
    else
        operator->OnMouseButtonUp(e);
}

Do you know why I have this error?

Johannes' explanation is right. I think that's an interesting mistake to make, though. — Martin v. Löwis, Dec 13 '10 at 08:29

score 9 · Accepted Answer · answered Dec 13 '10 at 08:27

9

operator is a keyword. The sequence operator = tries to declare an assignment operator which in your case would have a pointer parameter type. And your compiler wants to parse the very last closure as a special specifier like override (afaik an extension of MSVC), const or such.

Rename the variable to something else, like myoperator.

answered Dec 13 '10 at 08:27

Johannes Schaub - litb

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I notice that SO has helpfully shown the `operator` keyword in a dark blue colour, instead of the usual black. – Greg Hewgill Dec 13 '10 at 08:30

error C3646: 'closure' : unknown override specifier

1 Answers1