From: Malcolm Matalka <mmatalka@gmail.com>
To: Nicolas Ojeda Bar <n.oje.bar@gmail.com>
Cc: Goswin von Brederlow <goswin-v-b@web.de>, caml-list@inria.fr
Subject: Re: [Caml-list] Destructive use of file descriptors
Date: Thu, 06 Aug 2015 19:50:38 +0000 [thread overview]
Message-ID: <864mkcci29.fsf@gmail.com> (raw)
In-Reply-To: <CAPunWhApy98_3Oyb+FkQLr7xdETAu33YpzGk2R6m9=cPBQF2tg@mail.gmail.com> (Nicolas Ojeda Bar's message of "Thu, 6 Aug 2015 11:48:07 +0200")
Nicolas Ojeda Bar <n.oje.bar@gmail.com> writes:
> Hi,
>
> No magic needed in OCaml:
>
> let with_open path f =
> let oc = open_out path in
> match f oc with
> | x -> close_out_noerr oc; x
> | exception e -> close_out_noerr oc; raise e
>
> and then use it as
>
> with_open "foo" (fun oc -> output_string oc str)
>
> Cheers
>
> Nicolas
>
The weakness with this (which I'm not sure if Python offers protection)
is returning something that references the file created. It can lead to
some confusing error messages.
next prev parent reply other threads:[~2015-08-06 19:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-06 9:40 Goswin von Brederlow
2015-08-06 9:48 ` Nicolas Ojeda Bar
2015-08-06 19:50 ` Malcolm Matalka [this message]
2015-08-11 9:36 ` Goswin von Brederlow
2015-08-11 11:14 ` Gabriel Scherer
2015-08-11 11:32 ` Ben Millwood
2015-08-06 9:48 ` Gabriel Scherer
2015-08-06 9:49 ` Pierrick Couderc
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