DOCUMENT:Q167966  10-FEB-2002  [visualc]
TITLE   :FIX: C2248: Statics in Friends, No Access to Protected Members
PRODUCT :Microsoft C Compiler
PROD/VER::5.0,6.0
OPER/SYS:
KEYWORDS:kbcode kbtool kbVC500bug kbVC600bug kbNoUpdatekbbuglist

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The information in this article applies to:

 - The C/C++ Compiler (CL.EXE), used with:
    - Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0 
    - Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0 
    - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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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.

This problem was corrected in Microsoft Visual C++ .NET.

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() ;
      }

Additional query words:

======================================================================
Keywords          : kbcode kbtool kbVC500bug kbVC600bug kbNoUpdate kbbuglist
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :5.0,6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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