'QObject::QObject' cannot access private member declared in class 'QObject'

Sulla picture Sulla · Aug 18, 2010 · Viewed 23.3k times · Source
class CHIProjectData : public QObject
{
public:
    CHIProjectData();
    CHIProjectData(QMap<QString,QString> aProjectData,
                   CHIAkmMetaData* apAkmMetaData = 0,
                   QObject* parent = 0);
private:
    QMap <QString,QString> m_strProjectData;
    CHIAkmMetaData* m_pAkmMetaData;
};

CHIProjectData::CHIProjectData(QMap<QString,QString> aProjectData,
                               CHIAkmMetaData* apAkmMetaData,
                               QObject* aParent)
    :
    QObject(aParent)
{
        m_strProjectData = aProjectData;
        m_pAkmMetaData = apAkmMetaData;
}

Why does it give the "'QObject::QObject' cannot access private member declared in class 'QObject'" error?

Answer

Caleb Huitt - cjhuitt picture Caleb Huitt - cjhuitt · Aug 18, 2010

I'm guessing that your CHIProjectData class is being copied somewhere (using the compiler-generated copy constructor or assignment operator). QObject cannot be copied or assigned to, so that would cause an error. However, the compiler has no line to point to for the error, so it chooses some line in the file (the final brace is common, since that is when the compiler knows if it should generate those functions or not, after parsing the class declaration to see if they already exist).