From: skaller <skaller@ozemail.com.au>
To: Luc Maranget <luc.maranget@inria.fr>
Cc: Pierre Weis <pierre.weis@inria.fr>, caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] Question
Date: 12 Dec 2003 01:20:11 +1100 [thread overview]
Message-ID: <1071149045.2554.27.camel@pelican> (raw)
In-Reply-To: <20031211105245.A2501@beaune.inria.fr>
On Thu, 2003-12-11 at 20:52, Luc Maranget wrote:
> To conclude adopting the Felix way in Ocaml is by no mean a trivial
> change and benefits are unclear, how many programs do realy use this
> feature ?
Well, none in Ocaml because it isn't present :-)
I have occasionally wanted this, but there is always
a workaround.
Basically, I think it would be useful in the following
situation:
match x with
| A
| (B (j,k) when j=k) ->
| B (j,k) ->
Without a nested when clause, you could code
let handler () = ... in
match x with
| A -> handler ()
| B (j,k) when j = k -> handler ()
| B (j,k) -> ...
delocalising the handler. (I have matches several pages long,
so this is annoying).
Also useful would be:
match x with
| A i
| B (i,k) when i = k -> ... i ..
though I can't see a way to generalise that.
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next prev parent reply other threads:[~2003-12-11 15:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-01 15:41 sebastien FURIC
2003-12-01 17:48 ` Remi Vanicat
2003-12-01 18:04 ` sebastien FURIC
2003-12-03 14:02 ` Damien Doligez
2003-12-10 10:27 ` Pierre Weis
2003-12-10 15:53 ` skaller
2003-12-11 9:52 ` Luc Maranget
2003-12-11 14:20 ` skaller [this message]
2003-12-11 16:56 ` Luc Maranget
2005-05-23 6:54 Question dsingh01
2005-05-23 7:40 ` [Caml-list] Question Remi Vanicat
2005-05-23 12:21 ` Jacques Carette
2005-06-08 10:06 question dsingh01
2005-06-08 15:13 ` [Caml-list] question Damien Bobillot
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