Q119519: BUG: Aggregate Initializer Fails In VC++ 32-bit, Ver. 1.0, 2.0

Article: Q119519
Product(s): Microsoft C Compiler
Version(s): 1.0,2.0
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVCkbbuglist
Last Modified: 29-JUL-2001

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The information in this article applies to:

- Microsoft C/C++ Compiler (CL.EXE), included with:
   - *EDITOR Please do not choose this product*Microsoft Visual C++ 32-bit Edition* use 241, 265, 225, versions 1.0, 2.0 
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SYMPTOMS
========

If "operator =" is overridden in an aggregate class, you can no longer use an
initializer list to construct a constant object.

CAUSE
=====

The assignment operator causes the const object to be place in read only memory
before it is initialized. Upon initialization of the object, the application
fails with an access violation.

RESOLUTION
==========

To work around this problem, create a constructor to initialize the object.

STATUS
======

Microsoft has confirmed this to be a bug in the products listed at the beginning
of this article. We are researching this bug and will post new information here
in the Microsoft Knowledge Base as it becomes available.

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

The following sample generates an Application Error message box when
initializing kZeroMLUInt64:

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

  class MLUInt64 {
  public:
   // If this following inline method is commented out the correct code
   // will be generated.
      const MLUInt64 & operator= (const MLUInt64 &u64)
                        {fVal[0] = u64.fVal[0];
                         fVal[1] = u64.fVal[1];
                         return *this;}

      int    fVal[2];
  }; // class MLUInt64

  const MLUInt64 kZeroMLUInt64 = {1,1};

  void main(void) {

     MLUInt64 kTempMLUInt64;

     kTempMLUInt64 = kZeroMLUInt64;
  }

Additional query words: 8.00 9.00 1.00 2.00

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC kbbuglist
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :1.0,2.0

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

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