Q102367: BUG: CXX0030 Error Using Enumerated Type in Class

Article: Q102367
Product(s): Microsoft Programming Utilities
Version(s): 4.0,4.01,4.05,4.1; WINDOWS:1.0
Operating System(s): 
Keyword(s): kb16bitonly
Last Modified: 08-NOV-2001

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The information in this article applies to:

- Microsoft CodeView for MS-DOS, versions 4.0, 4.01, 4.05, 4.1 
- Microsoft CodeView for Windows, versions 4.0, 4.01, 4.1 
- Microsoft Visual Workbench for Windows, version 1.0 
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SYMPTOMS
========

An attempt to display a variable in the Locals, QuickWatch, or Watch windows
fails and CodeView or Visual Workbench displays the following message:

  CXX0030 : Error : expression cannot be evaluated

CAUSE
=====

The application uses a type-defined enumerated bitfield in a class type and the
user attempts to display the value of a variable of that type. The CXX0030 error
may not occur if you do not attempt to display it.

STATUS
======

Microsoft has confirmed this to be a problem in CodeView versions 4.0x and 4.1
for MS-DOS and Windows and in Visual Workbench version 1.0 for Windows.

This is not a problem in CodeView version 4.25 for Win32s.

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

The following code example demonstrates this problem.

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

  /*
   * Compiler options needed: /Zi /Od /f-
   */ 

  #include <iostream.h>
  typedef enum
  {
     T1
  } TENUM;

  class TEST
  {
  public:
     TEST();
     TENUM linkstate:8;
  };

  TEST::TEST()
  {
     linkstate = T1;
  }

  TEST *port;
  void main(void)
  {
     port = new TEST;
     // NOTE: Must refer to linkstate for CXX0033 error to occur.
     port->linkstate;
     delete port;
  }

Additional query words: 4.00 4.10

======================================================================
Keywords          : kb16bitonly 
Technology        : kbVSsearch kbAudDeveloper _IKkbbogus kbCodeView kbSDKSearch kbZNotKeyword3 kbWinSDKSearch kbCodeView400DOS kbCodeView401DOS kbCodeView405DOS kbCodeView410DOS kbCodeView400 kbCodeView401 kbCodeView410 kbVWB
Version           : :4.0,4.01,4.05,4.1; WINDOWS:1.0

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

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