Re: UN-using a namespace?

From:

"Alexander Grigoriev" <alegr@earthlink.net>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 12 Mar 2007 21:19:25 -0700

Message-ID:

<eF03LbSZHHA.4220@TK2MSFTNGP03.phx.gbl>

You cannot introduce comments by preprocessor. Comments are handled _before_
preprocessor tokens are parsed.

"Heinz Ozwirk" <SPAMhozwirk@arcor.de> wrote in message
news:45f5c7f2$0$15958$9b4e6d93@newsspool4.arcor-online.net...

Perhaps you are lucky and the offending headers only use using to inject
their own namespace into the global one. Then you could try something like

   #define using /##/
   #include "OffendingHeader.h"
   #undef using

Not really nice, but using using in a header isn't really nice either. I
don't remember what the standard has to say about /##/, but it works with
VS 2005:

~~~~~
// BadHeader.h
namespace foo
{
   int x;
}
using namespace foo;
~~~~~
// Test.cpp
#define using /##/
#include "BadHeader.h"
#undef using
double x;
~~~~~

Test.cpp compiles with VS 2005, but fails to compile if #define using /##/
is removed.

But may it work or not -- complain to the creator of your library!

HTH
   Heinz