Q263589: BUG: Pointer to Member Allows Non-const Method Call on const Obj

Article: Q263589
Product(s): Microsoft C Compiler
Version(s): winnt:6.0
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVC600bug
Last Modified: 03-MAY-2001

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The information in this article applies to:

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

No error or warning message is generated if you try to call a non-const member
function on a const class object by using a member pointer.

STATUS
======

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

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

Steps to Reproduce Behavior
---------------------------

The following sample code demonstrates the bug:

  //test.cpp
  //compiler option needed: none
  class A
  {
    int  m_val;
   public:
     A(int i=0) : m_val(i) {}
     void Add(int val) { m_val+=val; }
  };
   
  int main()
  {
  	void(A::*MFptr)(int) = &A::Add;
  	const A ca;      //const object
   	(ca.*MFptr)(5);  //no error here
  	return 0;
  }

Additional query words:

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC600bug 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : winnt:6.0
Issue type        : kbbug

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