Q115854: FIX: Cannot Access Private Member from Friend Class

Article: Q115854
Product(s): Microsoft C Compiler
Version(s): 1.0,1.5
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVCkbbuglist kbfixlist
Last Modified: 12-FEB-2002

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), included with:
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5 
   - Microsoft Visual C++, 32-bit Editions, version 1.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When compiling the code below, the C/C++ compiler will incorrectly report the
following error:

  C2248: 'ptr' : cannot access private member declared in class 'X'

STATUS
======

Microsoft has confirmed this to be a bug in the products listed at the beginning
of this article. This problem was corrected in Visual C++ version 2.0.

MORE INFORMATION
================

The following sample can be used to demonstrate this problem.

Sample Code
-----------

  /* Compile options needed: none
  */ 

  #include <iostream.h>
  class C
  {
     class X;
     class Y;

     class X
     {
        X* ptr;
        friend Y;
     };

     class Y
     {
        X* x;
      public:
        X* lookat() { return x->ptr; }           /* Error: C2248 */ 
     };
  };
  void main( void )
  {
     cout << "PASSED" << endl;
  }

Additional query words: 1.00 1.50 7.00 8.00 8.00c

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC kbbuglist kbfixlist
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :1.0,1.5
Issue type        : kbbug
Solution Type     : kbfix

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

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