QMetaObject::Connection, how to test for success

SPlatten

I've read in the online documentation that QMetaObject::Connection has an operator bool() which returns true if the connection is valid.

https://doc.qt.io/qt-5/qmetaobject-connection.html

Question is how do I access it? I've tried creating a local instance of QMetaObject::Connection cn and assigning it to the return of a QObject::connect.

How do I perform the test? I see nothing to call.

Christian Ehrlicher

auto conn = QObject::connect()...
if (!conn)
{
  qWarning() << "Connect not successful!";
}

SGaist

Hi,

It should be something like:

If (connection) {
    // do what you want 
}

SPlatten

Thank you!