On Sat, 5 Dec 2009, Henning Thielemann wrote:
On Sun, 6 Dec 2009, Michael Snoyman wrote:
I think there are plenty of examples like web servers. A text editor with
plugins? I
don't want to lose three hours worth of work just because some plugin
wasn't written
correctly. For many classes of programs, the distinction between error and
exception is
not only blurred, it's fully irrelevant. Harping on people every time they
use error in
the "wrong" sense seems unhelpful.
Hope my commenting on this subject doesn't become my own form of
*pedantry*.
In an earlier thread I have explained that one can consider a software
architecture as divided into levels. What is an error in one level (text
editor plugin, web server thread, operating system process) is an exception
in the next higher level (text editor, web server, shell respectively). This
doesn't reduce the importance to distinguish between errors and exceptions
within one level. All approaches so far that I have seen in Haskell just mix
exceptions and errors in an arbitrary way.
I have just written more details on this topic:
http://www.haskell.org/haskellwiki/Error_vs._Exception
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