From: Martin Jambon <martin1977@laposte.net>
To: taras <taras.judge@shaw.ca>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Pattern matching fallthrough with guards
Date: Tue, 28 Nov 2006 11:53:21 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.58.0611281144350.16862@localhost> (raw)
In-Reply-To: <456C8774.4040009@shaw.ca>
On Tue, 28 Nov 2006, taras wrote:
> Hi,
> I noticed that one can coalesce multiple patterns like
>
> function Some _
> | None -> 0
>
> However when I add guards to this hypothetical example, I get a syntax error
>
> function Some _ when 1 = 2
> | None -> 0
>
> I'm wondering if this inconsistency is considered to be a bug or not?
It's not a bug.
The "when" guard must come just before the arrow.
But the vertical bar may be more powerful than what you expect. You can do
this:
function Some (0|1) | None -> ...
| ...
Martin
--
Martin Jambon, PhD
http://martin.jambon.free.fr
prev parent reply other threads:[~2006-11-28 19:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-28 19:01 taras
2006-11-28 19:53 ` Martin Jambon [this message]
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