[boost] [system] Possible breakage: naming changes to conform to C++ std

From: Beman Dawes (bdawes_at_[hidden])
Date: 2007-10-23 09:01:45

At the Kona meeting two weeks ago, the C++ committee accepted most of 
the Diagnostics changes proposed in N2415.

See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2415.html

Most of Boost.System doesn't change since it already reflects N2415.

The committee did, however, change the name of the nested "posix" 
namespace to "posix_error". For consistency, that means the "Linux" 
namespace changes to "linux_error" and the "windows" namespace changes 
to "window_error". As a consequence, the "linux_error" enum changes to 
"linux_errno".

To minimize code breakage, I've added namespace aliases to error_code.hpp:

# ifndef BOOST_SYSTEM_NO_DEPRECATED
     namespace posix = posix_error;
# endif

# ifndef BOOST_SYSTEM_NO_DEPRECATED
     namespace Linux = linux_error;
# endif

# ifndef BOOST_SYSTEM_NO_DEPRECATED
     namespace windows = windows_error;
# endif

That was sufficient to prevent any code breakage in the Boost.System and 
Boost.Filesystem test code, but any user code that actually mentions the 
linux_errno enum (rather than its constants) will have to be changed.

--Beman