PRB: Error CXX0017 or CXX0034 for typedef

Last reviewed: July 25, 1997
Article ID: Q119501

The information in this article applies to:

The Visual Workbench Integrated Debugger included with: - Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 2.1, 4.0, 5.0

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.

Keywords          : WBDebug
Version           : 1.0 2.0 2.1 4.0 5.0
Platform          : NT WINDOWS
Issue type        : kbprb

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Last reviewed: July 25, 1997
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