From: Michael Hicks <mwh@cs.umd.edu>
To: Lauri Alanko <la@iki.fi>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Exceptions considered harmful
Date: Sun, 4 Jul 2004 16:24:20 -0400 [thread overview]
Message-ID: <21A5580B-CDF8-11D8-B2E6-000D93C1F22A@cs.umd.edu> (raw)
In-Reply-To: <20040704073050.GA907@la.iki.fi>
> try
> x <- foo ()
> in
> bar ()
> unless
> E1 -> handle1 ()
> E2 -> handle2 ()
The key part to this approach is that bar() is not covered by the
exception handler. This allows the caller to communicate the
successfully created value into bar() through x. In a traditional
setting, you'd have something like
let x := NONE;
try
x := SOME foo();
with E1 -> ....
if !x <> NONE then bar !x
else ??
Mike
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next prev parent reply other threads:[~2004-07-04 20:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040628143917.GA21847@fichte.ai.univie.ac.at>
[not found] ` <Pine.LNX.4.44.0406290056580.1229-100000@localhost>
[not found] ` <20040628173400.GB26193@fichte.ai.univie.ac.at>
2004-06-29 1:02 ` skaller
2004-07-04 7:30 ` Lauri Alanko
2004-07-04 20:16 ` Christophe TROESTLER
2004-07-04 20:24 ` Michael Hicks [this message]
2004-07-05 3:42 ` skaller
2004-07-11 13:12 ` [Caml-list] " Richard Cole
2004-06-29 18:05 [Caml-list] " Brandon J. Van Every
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