Re: [Caml-list] <DKIM> Re: Vagaries of Printf variants

[Pierre Chambart <pierre.chambart@laposte.net>]

On 28/10/2014 10:19, Gabriel Scherer wrote:
> If you know from the start that you need this flexibility, the easiest
> way is probably to use Printf.bprintf from the start, which is
> reasonably efficient and flexible (or write your fprintf-formats with
> %s rather than %a).
>
> If you specifically need to convert code that uses (f)printf with
> minimal changes, you have the problem that your %a/%t functions work
> with out_channel, not strings. The simplest way out is probably to use
> Unix.pipe (which is available on Windows) to create an out_channel
> that you write into and read back the content as a string.
I wouldn't recommend something like that: you are exposing yourself to
deadlocks.
If you are not carefull, your write will reach the OS-defined limit to
the pipe size, and
will block the process until someone reads the pipe. So you will need
another
thread to read the channel...
-- 
Pierre