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
I guess you will have to rename one of them.
C programming resources:
GNU C Function and Macro Index -- glibc reference manual
The C Book -- nice online learner guide
Current ISO draft standard
CCAN -- new CPAN like open source library repository
3 (different) GNU debugger tutorials: #1 -- #2 -- #3
cpwiki -- our wiki on sourceforge
As I mentioned neither belong to me, they are part of other projects one opensource and the other commercial.
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.
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
Do you need both definitions of OK?
If not, something like this might work
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.Code:#define OK BAH_HUMBUG #include "common.h" #undef OK #include "libsomething.h"
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.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
