From: Harry Ohlsen <harryo@...>
Date: 2001-12-13T16:05:35+09:00
Subject: [ruby-talk:28393] Re: Documentation of the different Exception types

In article <1008221873.000513.4960.nullmailer@ev.netlab.jp>, "Yukihiro
Matsumoto" <matz@ruby-lang.org> wrote:

> RuntimeError is an exception reserved for lazy programmers.  You good
> programmers should not use this unless you're working on trivial
> scripts.

Agreed.  However, as Tobias said, it's a little hard to know what
exceptions we should be raising/expecting, because there seems to be no
real documentation as to when they are raised or what data they contain
(one could obviously use reflection to work that out, but that seems a
bit messy, especially since all that tells you is their names, not what
they're intended purpose is).

> SystemCallError is just a super class of all system call exceptions.

Yes, I gathered that from looking at the pickaxe book.  However, is there
any documentation that lists which subclasses exist and under what
circumstances they are raised?

For example, when YOU write code, how do you work out what exceptions to
write rescue clauses for?  Do you have an approach you take to work it
out, or just a good memory :-) ??