From: Daniel de Rauglaudre <daniel.de_rauglaudre@inria.fr>
To: caml-list@inria.fr
Subject: Re: [Caml-list] mixing fast and [<>] stream: illegal?
Date: Sun, 4 Nov 2001 20:06:36 +0100 [thread overview]
Message-ID: <20011104200636.T25844@verdot.inria.fr> (raw)
In-Reply-To: <20011104185952.A5548@cs.unibo.it>; from zack@cs.unibo.it on Sun, Nov 04, 2001 at 06:59:52PM +0100
Hi,
On Sun, Nov 04, 2001 at 06:59:52PM +0100, Stefano Zacchiroli wrote:
> Seems to me that no illegal action was performed ...
> Am I wrong?
> Is really dangerous mixing the two streams?
The doc meant "streams expressions built with [< >]", not parsers. The [< >]
in parsers are stream patterns, not stream expressions. Your code is ok.
What does not work are things like [< '1; Stream.from gen; '2 >].
It is not dangerous, it will just fail:
# let gen i = Some i;;
val gen : 'a -> 'a option = <fun>
# let s = [< '1; Stream.from gen; '2 >];;
val s : int Stream.t = <abstr>
# Stream.next s;;
- : int = 1
# Stream.next s;;
Uncaught exception: Failure "illegal stream concatenation".
--
Daniel de RAUGLAUDRE
daniel.de_rauglaudre@inria.fr
http://cristal.inria.fr/~ddr/
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prev parent reply other threads:[~2001-11-04 19:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-04 17:59 Stefano Zacchiroli
2001-11-04 19:06 ` Daniel de Rauglaudre [this message]
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