From: "Nicolas Pouillard" <nicolas.pouillard@gmail.com>
To: tmp123 <tmp123@menta.net>
Cc: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] log function without evaluate arguments
Date: Tue, 06 Nov 2007 19:25:09 +0100 [thread overview]
Message-ID: <1194373338-sup-9994@ausone.local> (raw)
In-Reply-To: <47309EEC.4080706@menta.net>
Excerpts from tmp123's message of Tue Nov 06 18:05:48 +0100 2007:
> Hello,
>
> In order to implement a function that prints log messages only, by
> example, if a boolean flag is true, and does nothing elsewhere, I've
> been reading the (long) post sequence "kprintf with user formatters"
> (2004 Jun 30).
>
> In this context, "does nothing" means not convert parameters to text nor
> evaluate them.
Have a look to the Printf.ifprintf [1] function, it does exactly what you want.
Regards,
[1]:
val ifprintf : 'a -> ('b, 'a, unit) format -> 'b
(** Same as {!Printf.fprintf}, but does not print anything.
Useful to ignore some material when conditionally printing. *)
--
Nicolas Pouillard aka Ertai
next prev parent reply other threads:[~2007-11-06 18:25 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-06 17:05 tmp123
2007-11-06 16:57 ` Sylvain Le Gall
2007-11-06 18:25 ` Nicolas Pouillard [this message]
2007-11-06 18:40 ` [Caml-list] " Till Varoquaux
2007-11-06 18:49 ` Brian Hurt
2007-11-07 3:39 ` Christopher L Conway
2007-11-07 4:00 ` Erik de Castro Lopo
2007-11-07 4:10 ` Christopher L Conway
2007-11-07 13:42 ` Brian Hurt
2007-11-07 10:21 ` Nicolas Pouillard
2007-11-07 3:40 ` Christopher L Conway
[not found] ` <4a051d930711061938u25836a85ud28c610312e5896f@mail.gmail.com>
2007-11-07 10:31 ` tmp123
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