BUG: C2248: Statics in Friends, No Access to Protected Members

Last reviewed: May 21, 1997
Article ID: Q167966

The information in this article applies to:

The C/C++ Compiler (CL.EXE) included with: - Microsoft Visual C++, 32-bit Editions, version 5.0

SYMPTOMS

When you create a static object created in a friend function, it is denied access to protected members of a class and compiler error C2248 appears as follows:

   'member' : cannot access protected member declared in class 'class'

RESOLUTION

Create the static object using the new operator.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

The following sample demonstrates the problem and the workaround.

Sample Code

   #include <iostream>

   //#define WORKAROUND //Uncomment this line for workaround

   class A
   {
   protected:
   A() { std::cout << "A()" << std::endl ;}
   ~A() { std::cout << "~A()" << std::endl ;};

   friend A* GetA();
   };

   A* GetA()
   {
   #ifndef WORKAROUND
     static A a ;
     return &a ;
   #else

     static A *pA = new A;
     return pA;
   #endif
   }

   void main()
   {
    A *pA = GetA() ;
   }

Keywords : CPPIss CPPLngIss kbcode kbtool vcbuglist500 kbbuglist
Version : 5.0
Platform : NT WINDOWS
Issue type : kbbug

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Last reviewed: May 21, 1997
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