From: Jonathan Roewen <jonathan.roewen@gmail.com>
To: Christophe Dehlinger <christophe.dehlinger@ifp.fr>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Mixing variant types...
Date: Wed, 11 Jan 2006 23:36:54 +1300 [thread overview]
Message-ID: <ad8cfe7e0601110236r6e12fcc0pa30d958ba579c3f@mail.gmail.com> (raw)
> Hi,
>
> Have you tried explicitly casting event to an open variant type (or
> whatever they're called) ?
>
> let sources = (Event.receive internal_control) :: List.map (fun w ->
> Channel.receive (w.control :> 'a * [> event ]) !windows in
Hmm, I tried that, and also:
let sources = (Event.receive internal_control) :: List.map (fun w ->
((Channel.receive w.control) :> (window * [> event | `New_window ])
Event.event)) !windows in
I now get:
This expression cannot be coerced to type
(window * ([> `New_window | `Repaint ] as 'a)) Event.event;
it has type (window * event) Event.event but is here used with type
(window * 'a) Event.event
Type event = [ `Repaint ] is not compatible with type 'a
The first variant type does not allow tag(s) `New_window
Jonathan
next reply other threads:[~2006-01-11 10:36 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-11 10:36 Jonathan Roewen [this message]
2006-01-12 1:24 ` Jonathan Roewen
2006-01-12 2:45 ` skaller
2006-01-12 3:22 ` Jacques Garrigue
2006-01-12 3:57 ` skaller
2006-01-13 4:57 ` Jacques Garrigue
2006-01-13 7:56 ` skaller
2006-01-13 9:37 ` Jacques Garrigue
2006-01-12 3:59 ` Jonathan Roewen
-- strict thread matches above, loose matches on Subject: below --
2006-01-11 9:56 Jonathan Roewen
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