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[Caml-list] mixing fast and [<>] stream: illegal?

Stefano Zacchiroli
- Daniel de Rauglaudre

Date:	-- (:)
From:	Daniel de Rauglaudre <daniel.de_rauglaudre@i...>
Subject:	Re: [Caml-list] mixing fast and [<>] stream: illegal?

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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