redeclaration of enumerator

This is a discussion on redeclaration of enumerator within the C Programming forums, part of the General Programming Boards category; Hello Experts, I have two headers "common.h" and "libsomething.h" both define an enumeration called "OK" and neither belong to me ...

  1. #1
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    redeclaration of enumerator

    Hello Experts,

    I have two headers "common.h" and "libsomething.h" both define an enumeration called "OK" and neither belong to me (they are from different projects). I need to reference both these headers in one of my own. When I compile I get the following error:

    error: redeclaration of enumerator ‘OK’

    Is there a way for me to take advantage of the code in both these files?

    Thanks

  2. #2
    spurious conceit MK27's Avatar
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    I guess you will have to rename one of them.
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    As I mentioned neither belong to me, they are part of other projects one opensource and the other commercial.

  4. #4
    C++ Witch laserlight's Avatar
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    Change the open source code? OK is a rather bad name on two counts: it is short and without some kind of prefix (in a language without namespaces!), and it is all in uppercase which is a convention normally reserved for macro names.
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  5. #5
    and the hat of wrongness Salem's Avatar
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    Do you need both definitions of OK?

    If not, something like this might work
    Code:
    #define OK BAH_HUMBUG
    #include "common.h"
    #undef OK
    #include "libsomething.h"
    If you do need both, then you'll have to create your own small wrapper API which results in you only #including one of the header files at once.
    That can get a bit messy if you're not careful.

    If you only want say a small part of libsomething.h (say), and most of common.h, then you might also be able to just wrap the parts of libsomething which really interest you.

    Also, raise a bug report on both packages telling them about the poor use of generic names like "OK", and the likely conflicts it generates.
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