VS2013编译器：“ CObject :: CObject”：无法访问在类“ CObject”中声明的私有成员

Question

I'm trying to migrate a project from to c++11 in Visual Studio. I fixed a number of issues, but there's one remaining which I can't seem to crack with MFC:

error C2248: 'CObject::CObject' : cannot access private member declared in class 'CObject' (file.cpp)
: see declaration of 'CObject::CObject'
: see declaration of 'CObject'
This diagnostic occurred in the compiler generated function 'CList<ParameterValue,ParameterValue &>::CList(const CList<ParameterValue,ParameterValue &> &)'

This is code that hasn't changed on our end and has been compiling fine when targeting the Visual Studio 2010 toolset. From what I could gather it doesn't seem like the definition of CObject has changed either which makes it all the stranger.

There's other similar questions reported here, but I couldn't find a solution to my problem there. In most other cases it would appear the issue comes from a lack of public default constructors, Copy constructors, or assignment operators.

Our class that extends CList however provides public versions of all these, and ParameterValue does not inherit from CObject.

class __declspec(dllexport) GParameterValueList : public CList<ParameterValue, ParameterValue&>
{
// ParameterValue is a struct that DOES NOT inherit from CObject (or anything)
public:
    GParameterValueList();
    GParameterValueList(const GParameterValueList& SrcList);
    GParameterValueList& operator=(const GParameterValueList& SrcList);
}

Any help would be appreciated.

PSOur implementation is exported into a DLL, I'm wondering if that might be causing some conflicts?

Edit: Not a duplicate of error using CArray or error using CArray -> in these the CObject derived classes were missing public default and copy constructors. As described above, this is not the case with our code.

Answer 1

I think the problem is in your ParameterValue class. Try to declare public constructors in there, including the default constructor. It seems to me that the CList tries to call the ParameterValue constructor somewhere, but the former can't because the latter is private.

Alternatively, try to use a List of Pointers, like CList<ParameterValue*, ParameterValue*&> .

Another alternative is to use a std container instead of CList.