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From: Andreas Rossberg <rossberg@mpi-sws.org>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Newbie comment on constructor syntax
Date: Mon, 9 Nov 2015 11:35:22 +0100
Message-ID: <564076EA.7020805@mpi-sws.org> (raw)
In-Reply-To: <56407297.2060309@frisch.fr>

On 11/09/2015 11:16 AM, Alain Frisch wrote:
> On 09/11/2015 09:09, Soegtrop, Michael wrote:
>> The notation looks like tuples, both in definition and use, but it isn't.
>
> The should be not big obstacle to allow using real tuples
> (values/patterns) with multi-argument constructors, thus perhaps
> reducing the confusion.  In expression at least, this should be quite
> straightfoward because it can be understood as a local syntactic
> rewriting ("C e" -> "let (x1, ..., xn) = e in C (x1, ..., xn)" when C is
> a constructor with arity > 1 and "e" is not a syntactic tuple).
>
> See:
> http://caml.inria.fr/mantis/view.php?id=6455

Yes please, I would appreciate such sugar. Even more I would appreciate 
generalising that to allowing constructors to be used as first-class 
expressions (i.e., unapplied "C" -> "fun (x1,...,xN) -> C (x1,...,xN)" 
when C is a constructor with arity > 0). I had to write some AST mapping 
code recently that would have vastly benefited from that.

/Andreas


  reply index

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-06  9:33 Soegtrop, Michael
2015-11-06 10:04 ` Nicolas Ojeda Bar
2015-11-06 10:31 ` Francois Berenger
2015-11-06 12:20   ` Soegtrop, Michael
2015-11-06 12:34     ` Gabriel Scherer
2015-11-06 13:09       ` Soegtrop, Michael
2015-11-06 14:10         ` Ashish Agarwal
2015-11-06 15:19           ` Soegtrop, Michael
2015-11-06 15:22             ` Ashish Agarwal
2015-11-21 17:24       ` [Caml-list] Notation for currying Hendrik Boom
2015-11-21 17:42         ` Gabriel Scherer
2015-11-21 18:06         ` David Rajchenbach-Teller
2015-11-21 18:56           ` Gabriel Scherer
2015-11-06 12:29 ` [Caml-list] Newbie comment on constructor syntax Jonas Jensen
2015-11-06 12:46   ` Soegtrop, Michael
2015-11-06 12:55     ` Gabriel Scherer
2015-11-08 21:17 ` Florian Weimer
2015-11-08 22:51   ` Norman Hardy
2015-11-09  6:27     ` Florian Weimer
2015-11-09 13:27       ` Stefan Monnier
2015-11-09  8:10     ` Soegtrop, Michael
2015-11-09 10:00       ` Hendrik Boom
2015-11-09 10:17       ` Alain Frisch
2015-11-09 10:35         ` Andreas Rossberg [this message]
2015-11-09 12:28           ` Alain Frisch
2015-11-09 17:33           ` Alain Frisch
2015-11-09 18:09             ` Gabriel Scherer
2015-11-09 18:16               ` Andreas Rossberg
2015-11-09 21:12                 ` Gabriel Scherer
2015-11-09 22:06                   ` Alain Frisch
2015-11-09 22:27                   ` Andreas Rossberg
2015-11-09 22:57                     ` Jeremy Yallop
2015-11-10  0:11                   ` Hendrik Boom
2015-11-10  8:27                   ` Soegtrop, Michael
2015-11-10 10:26                     ` Romain Bardou
2015-11-10 10:44                       ` Alain Frisch
2015-11-10 10:55                         ` Romain Bardou
2015-11-10 13:17                           ` Alain Frisch
2015-11-10 13:41                             ` Romain Bardou
2015-11-10 14:01                               ` Alain Frisch
2015-11-13 15:36                           ` Romain Bardou
2015-11-10 11:17                         ` Soegtrop, Michael
2015-11-10 14:11                     ` Hendrik Boom
2015-11-10 14:40                       ` immanuel litzroth
2015-11-10 15:30                       ` Soegtrop, Michael
2015-11-10 17:28                         ` Gerd Stolpmann
2015-11-09 20:32               ` Alain Frisch

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