Article: Q119501
Product(s): Microsoft C Compiler
Version(s): 1.0,2.0,2.1,4.0,5.0
Operating System(s):
Keyword(s): kbDebug kbide
Last Modified: 15-FEB-2002
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The information in this article applies to:
- The Visual Workbench Integrated Debugger, used with:
- Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 4.0
- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0
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SYMPTOMS
========
Declare a structure type and typedef a pointer to the structure type as
follows:
struct MYSTRUCT {
int x;
int y;
};
typedef struct MYSTRUCT* PMYSTRUCT;
MYSTRUCT is a structure type and PMYSTRUCT is a typedef for a pointer to
MYSTRUCT. Declare and initialize the following variables:
struct MYSTRUCT var1 = {0, 0};
PMYSTRUCT var2 = &var1;
Putting a watch on "(PMYSTRUCT) &var2" produces the following error:
Visual C++ 1.0 and 4.0
----------------------
CXX0017: Error: symbol 'PMYSTRUCT' not found
Visual C++ 2.x
--------------
CXX0034: Error: types incompatable with operator
However, putting a watch on "(MYSTRUCT *) &var2" is successful.
CAUSE
=====
The typedef declares a new name for a type, but it does not define a new type.
The typecast attempted in the debugger requires the name of a defined type.
RESOLUTION
==========
Use the defined type in the typecast, rather than using the name declared with
the typedef.
Additional query words:
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Keywords : kbDebug kbide
Technology : kbVCsearch kbAudDeveloper
Version : :1.0,2.0,2.1,4.0,5.0
Issue type : kbprb
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