[boost] [system] error_condition::message is unclear to me

Subject: [boost] [system] error_condition::message is unclear to me
From: Jochen Wilhelmy (j.wilhelmy_at_[hidden])
Date: 2011-03-24 13:22:10

Hi!

I looked at boost::system and some things are unclear to me:
if error_code and error_condition are low level and abstract versions of 
the same
category, then if error_condition::message simply returns

|category().message( value() )|

then how does category know that it's a condition value and not an error 
value?
(error_code::message also returns| category().message( value() ))|
currently error_condition appears quite useless to me since the values 
have to be
the same as in error_code.
by the way msdn tells us that error_code is for system errors and 
error_condition
is for user-defined errors but this may be as true as unicode is 
equivalent to utf16 ;-)

another problem I see in system_error::what().
i think it's common sense that what() should return
- standarsized strings across platforms
- english strings
and is used only for lookup. but the current implementation returns the 
translated string of
the underlying operating system.

-Jochen