From: Alex Baretta <alex@barettadeit.com>
To: Olivier Michel <michel@lami.univ-evry.fr>
Cc: caml-list@inria.fr, the MGS project <mgs@lami.univ-evry.fr>
Subject: Re: [Caml-list] Changes on equality between 3.06 and 3.08.3
Date: Thu, 28 Apr 2005 18:41:19 +0200 [thread overview]
Message-ID: <4271122F.5090705@barettadeit.com> (raw)
In-Reply-To: <20050428100252.GF31263@lami.univ-evry.fr>
Olivier Michel wrote:
> Hi dear ocamlers,
>
> I just noticed the following change in Ocaml between release 3.06 and 3.08.3, as far
> as equality on records is concerned :
> ..
> # a = a;;
> Exception: Invalid_argument "equal: functional value".
Keep in mind that in 3.06 physical equality (==) implied structural
equality (=). Now, (=) now longer checks for (==), so no functional
value can be found to be structurally equal to any other functional
value. The following line illustrates this point.
# (=) (=) (=);;
Exception: Invalid_argument "equal: functional value".
Actually, an interesting question related to this one is why the
following line behaves as it does.
# (==) (==) (==);;
- : bool = false
Alex
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next prev parent reply other threads:[~2005-04-28 16:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-28 10:02 Olivier Michel
2005-04-28 16:29 ` [Caml-list] " Damien Doligez
2005-04-28 16:41 ` Alex Baretta [this message]
2005-04-28 17:06 ` Olivier Andrieu
2005-04-28 18:20 ` Marcin 'Qrczak' Kowalczyk
2005-04-28 18:23 ` Jon Harrop
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