[boost] [system] Do you use the deprecated features or cygwin/linux/windows_error.hpp?

Subject: [boost] [system] Do you use the deprecated features or cygwin/linux/windows_error.hpp?
From: Peter Dimov (lists_at_[hidden])
Date: 2018-09-14 18:48:08

I'd like to query the Boost community as to whether certain legacy features 
of Boost.System are in use; namely, (1) everything guarded by 
BOOST_SYSTEM_ENABLE_DEPRECATED and (2) the cygwin_error.hpp, 
linux_error.hpp, or windows_error.hpp headers.

Does anyone use these, and for what purpose? I'm thinking of dropping the 
deprecated features.

In addition, does anyone use boost::throws()? I'm thinking of at least 
discouraging its use in the documentation, if not deprecating it outright.