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From: Gabriel Scherer <gabriel.scherer@gmail.com>
To: rixed@happyleptic.org
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] syntax suggestion
Date: Sat, 27 Apr 2013 10:04:42 +0200	[thread overview]
Message-ID: <CAPFanBFt-v6qJ2M9-Pg7VXeDKriQ-290Gqc=hnT2b69Y7eaZFQ@mail.gmail.com> (raw)
In-Reply-To: <20130427071838.GA29737@ombreroze.happyleptic.org>

This is a subset of Richard Jones' "matches" syntax extension, turning
an pattern matching on 'a into a ('a -> bool) function:

  if (matches Some x when x > 15) variable then ...

(The original extension did not handle "when", but it would be quite
easy to add.)

On Sat, Apr 27, 2013 at 9:18 AM,  <rixed@happyleptic.org> wrote:
> Wouldnt it be nice if, as a special form of the = operator,
> "variable = pattern when condition" were equivalent to
> "match variable with pattern when condition -> true | _ -> false" ?
>
> So that one could easily check optional values for instance:
>
> if variable = Some x when x > 15 then blabla
>
> What do you think?
>
>
> --
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      reply	other threads:[~2013-04-27  8:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-27  7:18 rixed
2013-04-27  8:04 ` Gabriel Scherer [this message]

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