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Q120068: PRB: H2INC Does Not Handle #undef

Article: Q120068
Product(s): Microsoft Macro Assembler
Version(s): 6.1,6.11
Operating System(s): 
Keyword(s): 
Last Modified: 04-MAY-2001

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The information in this article applies to:

- Microsoft Macro Assembler (MASM), versions 6.1, 6.11 
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SYMPTOMS
========

The H2INC utility does not appear to handle #undef correctly. For example, the
following code fragment causes "error A2005: symbol redefinition: test2" to
appear:

     #define test2  2
     #if test2 == 2
        #undef test2
        #define test2 3
     #endif

CAUSE
=====

This behavior is by design.

The following .INC file is generated for the fragment listed in the "SYMPTOMS"
section:

      option expr32
      option casemap:none

      ; Begin of file xxx.h
      test2          EQU          2t
      test2          EQU          3t
      ; End of file xxx.h

NOTE: In MASM, constants defined with EQU cannot be redefined.

RESOLUTION
==========

A #define can define "text equates" as well as "numeric equates." In the case of
numeric constants, use an editor to change the "EQU" to a "=".

Additional query words: 6.10 6.11

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM610 kbMASM611
Version           : :6.1,6.11

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

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