From: Alain Frisch <frisch@clipper.ens.fr>
To: <wrader@OCF.Berkeley.EDU>
Cc: <caml-list@inria.fr>
Subject: Re: [Caml-list] A class that contains instances of itself?
Date: Sat, 5 Jan 2002 14:16:50 +0100 (MET) [thread overview]
Message-ID: <Pine.GSO.4.33.0201051415220.29030-100000@clipper.ens.fr> (raw)
In-Reply-To: <200201051245.g05Cjxp24150@war.OCF.Berkeley.EDU>
On Sat, 5 Jan 2002 wrader@ocf.berkeley.edu wrote:
> I want to have an class that can contain instances
> of that same class. Assume something like this:
> (ignore any easy syntax errors - I'm making
> up this example right now)
...
What about :
class someClass =
object(_ : 'self)
val mutable anotherInstanceOfSomeClass : 'self option = None
method talk () =
print_string("Hello.\n")
method setInstance x =
anotherInstanceOfSomeClass <- Some x
method useInstance () =
match anotherInstanceOfSomeClass with
| Some a -> a # talk ()
| None -> ()
end
?
--
Alain
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next prev parent reply other threads:[~2002-01-05 13:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-05 12:45 wrader
2002-01-05 13:15 ` John Prevost
2002-01-05 13:16 ` Alain Frisch [this message]
2002-01-05 23:27 ` [Caml-list] IMAP library for Caml? Will Benton
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