DOCUMENT:Q138847  07-FEB-2002  [visualc]
TITLE   :BUG: C2572 When Define Function Pointer w/ Default Argument
PRODUCT :Microsoft C Compiler
PROD/VER::4.0,4.1,4.2,5.0,6.0
OPER/SYS:
KEYWORDS:kbLangCPP kbVC kbVC500bug kbVC600bug

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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

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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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