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Date: Sat, 17 Mar 2007 12:56:29 +0100
From: Philippe Wang <lists@philippewang.info>
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To: Till Varoquaux <till.varoquaux@gmail.com>
Cc: ocaml ml <caml-list@inria.fr>
Subject: Re: [Caml-list] Printf issues
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X-Spam: no; 0.00; printf:01 sprintf:01 printf:01 sprintf:01 cheers:01 wrote:01 typing:01 caml-list:01 output:02 string:02 string:02 unit:03 unit:03 channel:05 channel:05 

Till Varoquaux wrote:
> I having typing issues with sprintf:
>
> # Printf.sprintf "%a";;
> - : (unit -> '_a -> string) -> '_a -> string = <fun>
>
> whereas:
>
> # Printf.printf "%a";;
> - : (out_channel -> '_a -> unit) -> '_a -> unit = <fun>
>
> Am I missing something out here? If not why can't sprintf accept the
> same printers as the other?

Probably because it's not meant to be as you want it to be!
Why should sprintf take a function to output something on a channel 
whereas it's used to return a string?

...

Cheers,
 Philippe