From: Jacques Carette <carette@mcmaster.ca>
To: caml-list@yquem.inria.fr
Cc: Gerd Stolpmann <info@gerd-stolpmann.de>
Subject: Re: [Caml-list] Patterns that evaluate
Date: Wed, 14 Feb 2007 14:11:59 -0500 [thread overview]
Message-ID: <45D35EFF.1000901@mcmaster.ca> (raw)
In-Reply-To: <1171479313.24335.33.camel@localhost.localdomain>
Gerd Stolpmann wrote:
> Before discussing syntax it is more important to
> define the semantics of such patterns. I mean we have already three
> predefined kinds of equality in O'Caml:
>
> - ( == )
> - ( = )
> - (fun x y -> compare x y = 0)
>
> I admit I do not prefer any one of them. So which equality should be
> used to test whether the variable is equal to the matched part of the
> value?
>
I would definitely favour structural equality, since that meshes well
with pattern-matching's semantics. Anything else would seem hard to
justify, but that's just my opinion.
Jacques
next prev parent reply other threads:[~2007-02-14 19:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-13 22:04 Jacques Carette
2007-02-13 22:07 ` [Caml-list] " Jon Harrop
2007-02-14 0:10 ` Jacques Carette
2007-02-14 18:20 ` Edgar Friendly
2007-02-14 18:55 ` Gerd Stolpmann
2007-02-14 19:10 ` Denis Bueno
2007-02-14 19:11 ` Jacques Carette [this message]
2007-02-14 19:25 ` Gerd Stolpmann
2007-02-14 20:30 ` Edgar Friendly
2007-02-14 21:05 ` Jon Harrop
2007-02-14 21:33 ` Jacques Carette
2007-02-14 22:34 ` Martin Jambon
2007-02-15 0:26 ` Jacques Garrigue
2007-02-15 3:57 ` Jon Harrop
2007-02-15 22:43 ` Don Syme
2007-02-14 20:29 ` Nathaniel Gray
2007-02-14 21:10 ` Jacques Carette
2007-02-15 3:53 ` skaller
2007-02-15 13:41 ` Jacques Carette
2007-02-15 14:10 ` skaller
2007-02-15 20:43 ` Nathaniel Gray
2007-03-07 11:15 ` Oliver Bandel
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