From: Eric Cooper <ecc@cmu.edu>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] (int * int) <> int*int ?
Date: Thu, 23 Feb 2006 13:33:06 -0500 [thread overview]
Message-ID: <20060223183306.GA17390@localhost> (raw)
In-Reply-To: <006101c6389e$9bbbc440$1f570b50@mshome.net>
On Thu, Feb 23, 2006 at 06:28:48PM +0100, Frdric Gava wrote:
> is anybody can semantically explain why this 2 types are differents ?
>
> # type t=A of int*int and t'= B of (int*int);;
> type t = A of int * int
> and t' = B of (int * int)
> [...]
> I understand that it'is force you to have a pair for A and not just a value
> of type pair but why this restriction ? It is not easy to explain why
> int*int <> (int*int).
See section 18.3.4 of the manual -- the distinction allows the runtime
representation of t to avoid a level of indirection. And since the
runtime representations are different, the types have to be different.
--
Eric Cooper e c c @ c m u . e d u
next prev parent reply other threads:[~2006-02-23 18:33 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-23 17:28 Frédéric Gava
2006-02-23 18:33 ` Eric Cooper [this message]
2006-02-23 19:03 ` [Caml-list] " Martin Jambon
2006-02-23 19:07 ` Frédéric Gava
2006-02-23 20:15 ` Brian Hurt
2006-02-23 21:30 ` Frédéric Gava
2006-02-23 21:57 ` Brian Hurt
2006-02-23 22:30 ` Frédéric Gava
2006-02-23 22:50 ` Brian Hurt
2006-02-23 23:07 ` Frédéric Gava
2006-02-24 8:38 ` Alessandro Baretta
2006-02-24 12:59 ` Damien Doligez
2006-02-23 18:33 ` Thomas Fischbacher
2006-02-23 18:56 ` David Brown
2006-02-23 19:24 ` Frédéric Gava
2006-02-23 19:37 ` Frédéric Gava
2006-02-23 19:45 ` Frédéric Gava
2006-02-24 0:01 ` Jacques Garrigue
2006-02-24 0:18 ` Lukasz Stafiniak
2006-02-24 2:17 ` Jacques Garrigue
2006-02-24 13:07 ` Alain Frisch
2006-02-25 17:42 ` Vincent Balat
2006-02-25 18:30 ` Nicolas Pouillard
2006-02-25 19:09 ` Richard Jones
2006-03-01 12:48 ` Nicolas Pouillard
2006-02-25 23:17 ` Christophe TROESTLER
2006-03-01 13:01 ` Nicolas Pouillard
2006-02-27 11:14 ` camlp4 renovation [was: [Caml-list] (int * int) <> int*int ?] Hendrik Tews
2006-02-24 13:39 ` [Caml-list] (int * int) <> int*int ? Nicolas Cannasse
2006-02-24 14:49 ` Frédéric Gava
2006-02-24 8:27 ` also for tagged records? [Was: Re: [Caml-list] (int * int) <> int*int ?] Sebastian Egner
2006-02-24 14:01 ` Thomas Fischbacher
2006-02-23 20:58 ` [Caml-list] (int * int) <> int*int ? Jon Harrop
2006-02-23 21:36 ` Frédéric Gava
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