Question

I created my class CData and derived it from CObject, because I need to serialize it.

class CData : public CObject
{
    DECLARE_SERIAL(CData);
public:
    CData();
    virtual ~CData();
    virtual void Serialize(CArchive& ar);

    //Data
    CString m_strName;
    ULONG m_ulID;
    CString m_strCorps;
    CPoint m_Coordinate;
    short m_sStatus;
};

And I use a vector of type vector<CData> in my document class. I add new CData-objects to the vector during the runtime of the program using vecData.push_back(Data) (where Data is of type CData).

But when I try to compile this i get the following error:

error C2248: ‘CObject::CObject’ : cannot access private member
declared in class ‘CObject’

I searched a bit and found out, that it has to do with the CObject-class to be non-copyable or something like this!?!?…

Does anyone know how to solve this problem?

Answer 1

CObject declares the copy constructor as private, so you need to implement the copy constructor (and assignment operator overload) for your class yourself. The CObject constructor documentation says:

The standard C++ default class copy constructor does a member-by-member copy. The presence of the private CObject copy constructor guarantees a compiler error message if the copy constructor of your class is needed but not available. You must therefore provide a copy constructor if your class requires this capability.

I hope this helps!