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Date: Tue, 1 Jun 1999 11:39:45 +0200
From: Jerome Vouillon <Jerome.Vouillon@inria.fr>
To: Ubik <u009731@alpcom.it>, caml-list@inria.fr
Subject: Re: Events, method iterator
References: <"Your <199905261207.OAA17846@tobago.inria.fr> <E10ykw0-0001U5-00@nestor> <4.1.19990530212605.009311e0@email.alpcom.it>
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In-Reply-To: <4.1.19990530212605.009311e0@email.alpcom.it>; from Ubik on Sun, May 30, 1999 at 09:44:25PM +0200
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On Sun, May 30, 1999 at 09:44:25PM +0200, Ubik wrote:

> a) How can i get the value associated with an event (if an event actually
> "carries" a value ...) ?
> i tried to send out a function through an int->int->int channel, i
> receive it from the other side with
>     an int->int->int event, but i can't apply it ...

An event is something that may happen on a channel. You have to wait
for it to get a value from the channel. You can either wait for one
event using the function "Event.sync", wait for any of a list of
events with "select" or check if an event has already happen with
"poll".

[...]
>     let paintObject x = x#paint
> 
>     class container = object
> 	inherit shape
> 	val mutable _objs:shape list = []
> 	method paint = List.iter paintObject _objs
> 	...
>     end
>     I have to define a function for every method to iterate, in this way ?
> There's no way to define an
>     explicit function to send messages to objects ?

Yes, you need to define a function each time. But you can do it inline :
   method paint = List.iter (fun x -> x#paint) _objs

-- Jérôme