Re: [boost] [system] Problem with error_code.hpp dependency on winerror.h

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2007-10-31 20:07:03

On Wed, 31 Oct 2007 19:50:04 -0400, "Beman Dawes" <bdawes_at_[hidden]> said:
> Emil Dotchevski wrote:
> > Perhaps the enum should be placed in a platform-specific header, for
> > example "boost/system/windows/error_code.hpp"?
...
> I'll go ahead and put in the BOOST_SYSTEM_NO_ENUM #ifndef. That will at 
> least allow users to avoid the system-specific enums if they wish. But 
> the enums provide a really nice facility for dealing with 
> system-specific errors, so I don't recommend using BOOST_SYSTEM_NO_ENUM 
> except in unusual circumstances.

I find the suggestion of separate header files a nice idea. We can
restrict system/error_code.hpp to only those interfaces specified for
C++0x, and have a header file for each of the OS-specific namespaces
(with the same name as the namespace for convenience), i.e.
system/windows_error.hpp, system/linux_error.hpp,
system/cygwin_error.hpp, and so on. Developers have to use the
OS-specific namespace qualification to refer to those error codes
anyway, so it doesn't seem like much extra burden to include the
additional header file.

Cheers,
Chris