Microsoft KB Archive/102367

= BUG: CXX0030 Error Using Enumerated Type in Class =

Article ID: 102367

Article Last Modified on 8/16/2005

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APPLIES TO


 * Microsoft CodeView 4.0
 * Microsoft CodeView 4.01
 * Microsoft CodeView 4.01
 * Microsoft CodeView 4.1
 * Microsoft CodeView 4.0
 * Microsoft CodeView 4.01
 * Microsoft CodeView 4.1
 * Microsoft Visual Workbench for Windows

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This article was previously published under Q102367



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- */

typedef enum {  T1 } TENUM;
 * 1) include 

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 KB102367

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