[Boost-users] [system] Default error codes

Subject: [Boost-users] [system] Default error codes
From: Gavin Lambert (gavinl_at_[hidden])
Date: 2013-10-10 19:03:34

boost/system/error_code.hpp defines "errc" as a collection of standard 
error codes (based on posix).

It also defines a constructor for error_code and error_condition that 
allows them to accept a single parameter of an enum type when 
is_error_code_enum is defined to true for that enum type.

It does not, however, actually do this for its own errc enum.

As a result, code such as this fails to compile:

boost::system::error_code ec(boost::system::errc::operation_canceled);

Is there some good reason for this, or is it an oversight?  It's 
certainly more annoying to have to explicitly specify the 
generic_category().