From: "Loup Vaillant" <loup.vaillant@gmail.com>
To: "Damien Doligez" <damien.doligez@inria.fr>
Cc: "Caml List" <caml-list@inria.fr>
Subject: Re: [Caml-list] Unexpected restriction in "let rec" expressions
Date: Tue, 26 Feb 2008 15:34:37 +0100 [thread overview]
Message-ID: <6f9f8f4a0802260634j133a6b5fl1868c6886f308c1b@mail.gmail.com> (raw)
In-Reply-To: <958FA43C-037A-47D3-9352-682443875A69@inria.fr>
2008/2/26, Damien Doligez <damien.doligez@inria.fr>:
> The restriction is documented in section 7.3 of the reference manual,
> and it's here to make recursive definitions work correctly under
> eager evaluation.
OK, I got it. By the way, replacing "couple" by "couple ()" does the trick:
# let loop f a =
let rec couple () = f (a, snd (couple ())) in
fst (couple ());;
val loop : ('a * 'b -> 'c * 'b) -> 'a -> 'c = <fun>
Now, I have yet to figure out the purpose of this so called "fixpoint
operator" (and if the above will work at all :-).
Thank you all,
Loup
next prev parent reply other threads:[~2008-02-26 14:34 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-26 12:24 Loup Vaillant
2008-02-26 14:04 ` [Caml-list] " Jean-Christophe Filliâtre
2008-02-26 14:18 ` Damien Doligez
2008-02-26 14:34 ` Loup Vaillant [this message]
2008-02-26 14:51 ` Gabriel Kerneis
2008-02-26 14:56 ` blue storm
2008-02-26 17:48 ` Nicolas Pouillard
2008-02-26 14:57 ` Dirk Thierbach
2008-02-27 8:53 ` Andrej Bauer
2008-02-27 9:43 ` Loup Vaillant
2008-02-27 12:02 ` Dirk Thierbach
2008-02-27 14:04 ` Loup Vaillant
2008-02-27 16:41 ` Dirk Thierbach
2008-02-27 23:32 ` Loup Vaillant
2008-02-27 19:03 ` Pal-Kristian Engstad
2008-02-27 23:46 ` Loup Vaillant
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