From: Daniel de Rauglaudre <daniel.de_rauglaudre@inria.fr>
To: Norman Ramsey <nr@eecs.harvard.edu>, caml-list@inria.fr
Subject: Re: my stupidity and non-tail calls
Date: Wed, 15 Dec 1999 11:04:53 +0100 [thread overview]
Message-ID: <19991215110453.C20737@jaune.inria.fr> (raw)
In-Reply-To: <199912141953.OAA04635@labrador.eecs.harvard.edu>; from Norman Ramsey on Tue, Dec 14, 1999 at 02:53:18PM -0500
> OK, I apologize for bothering everyone. My `tail calls' are actually
> sitting inside `try ... with' blocks, so I recognize that these cannot be
> optimized since they are in the scope of different handlers. I will
> have to find a way to restructure my code. A great pity, since
> I like it the way it is... suggestions are welcome.
To resolve this problem, instead of:
try
let x = exp in
f x
with Exception -> y
you can use the equivalent (but the call to "f" is tail):
match (try Some exp with Exception -> None) with
Some x -> f x
| None -> y
I use that thousands of times in my code, when needed.
--
Daniel de RAUGLAUDRE
daniel.de_rauglaudre@inria.fr
http://cristal.inria.fr/~ddr/
next prev parent reply other threads:[~1999-12-15 21:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-12-14 19:53 Norman Ramsey
1999-12-15 10:04 ` Daniel de Rauglaudre [this message]
1999-12-16 7:45 ` A common use of try ... with Judicael Courant
1999-12-16 10:43 ` Daniel de Rauglaudre
1999-12-16 11:56 ` Christophe Raffalli
1999-12-15 16:39 ` my stupidity and non-tail calls David Brown
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