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Q138847: BUG: C2572 When Define Function Pointer w/ Default Argument

Article: Q138847
Product(s): Microsoft C Compiler
Version(s): 4.0,4.1,4.2,5.0,6.0
Operating System(s): 
Keyword(s): kbLangCPP kbVC kbVC500bug kbVC600bug
Last Modified: 07-FEB-2002

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The information in this article applies to:

- Microsoft Visual C++, versions 4.0, 4.1 
- Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0 
- Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0 
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
- Microsoft Visual C++.NET (2002) 
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SYMPTOMS
========

When you compile the code shows in the "Sample Code to Reproduce Problem"
section of this article, Visual C++ reports the following error:

  error C2572: 'member' : redefinition of default parameter : parameter 1

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

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

The error occurs only when a function pointer is a static member of a class, and
the function pointer type is a function that has a default argument. The error
is reported for the line where the static member is defined.

Sample Code to Reproduce Problem
--------------------------------

     /* Compile options needed: none
     */ 

     typedef void (*function_ptr)( int default_arg = 0 );

     class my_class
     {
     public:
         static function_ptr member;
     };

     function_ptr my_class::member;  // error will be reported for this line
   

Additional query words: kbVC400bug

======================================================================
Keywords          : kbLangCPP kbVC kbVC500bug kbVC600bug 
Technology        : kbVCsearch kbVC400 kbAudDeveloper kbVC410 kbVC420 kbVC500 kbVC600 kbVC32bitSearch kbVCNET kbVC500Search
Version           : :4.0,4.1,4.2,5.0,6.0
Issue type        : kbbug

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

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