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From: Tiphaine Turpin <Tiphaine.Turpin@irisa.fr>
To: "Jérémie Dimino" <jeremie@dimino.org>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] printf "%a" vs sprintf "%a"
Date: Thu, 26 Mar 2009 18:37:21 +0100	[thread overview]
Message-ID: <49CBBD51.5090005@irisa.fr> (raw)
In-Reply-To: <1238088594.8677.26.camel@localhost.localdomain>

Thanks for the replies. sprintf2 is just fine for me.

Tiphaine


Jérémie Dimino a écrit :
> Tiphaine Turpin wrote:
>   
>> has type string. But %a breaks this rule. Wouldn't it be simpler to have
>> two separate directives which accept respectively string printers and
>> channel printers, regardless of the outer printing function ?
>>     
>
> Note that you can do it with batteries and the new printf.
>
> The default "%a" directive always uses a channel printer:
>
> # Print.printf p"%a";;
> - : (unit Batteries.IO.output -> '_a -> unit) -> '_a -> unit = <fun>
> # Print.sprintf p"%a";;
> - : (unit Batteries.IO.output -> '_a -> unit) -> '_a -> string = <fun>
>
> And you can define a "%foo" directive which always uses a string printer:
>
> # let printer_foo k f x = k (fun out -> String.print out (f x));;
> val printer_as : (('a Batteries.IO.output -> unit) -> 'b) -> ('c -> string) -> 'c -> 'b = <fun>
> # Print.printf p"%foo";;
> - : ('_a -> string) -> '_a -> unit = <fun>
> # Print.sprintf p"%foo";;
> - : ('_a -> string) -> '_a -> string = <fun>
>
> Cheers,
> Jérémie
>
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>   


      reply	other threads:[~2009-03-26 17:37 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-26 16:53 Tiphaine Turpin
2009-03-26 17:29 ` [Caml-list] " David Rajchenbach-Teller
2009-03-26 17:29 ` Jérémie Dimino
2009-03-26 17:37   ` Tiphaine Turpin [this message]

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