From: "Andreas Rossberg" <AndreasRossberg@web.de>
To: <caml-list@yquem.inria.fr>
Subject: Re: [Caml-list] partial application warning unreliable?
Date: Fri, 9 Dec 2005 19:54:21 +0100 [thread overview]
Message-ID: <002c01c5fcf1$f791e9e0$15b2a8c0@wiko> (raw)
In-Reply-To: <1134148648.8940.167.camel@rosella>
"skaller" <skaller@users.sourceforge.net> wrote:
> Felix allows
>
> f: int -> 0
>
> but not
>
> g: 0 -> int
Then your "0" is not a proper type in the usual formal sense. Even less is
it the type-theoretic 0.
As Andrej Bauer points out, void vs unit has nothing to do with side
effects. If you want to capture side effects properly in a type system the
known approaches are effect systems or monads. In fact, your 0 looks
somewhat like a monad type with implicit injection and semicolon as a kind
of forgetting bind operator. But it seems sufficiently adhoc to make any
type-theoretic interpretation difficult.
- Andreas
prev parent reply other threads:[~2005-12-09 18:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-08 2:39 skaller
2005-12-08 3:10 ` [Caml-list] " Jacques Garrigue
2005-12-08 7:11 ` skaller
2005-12-08 14:41 ` Damien Doligez
2005-12-08 23:51 ` malc
2005-12-09 1:43 ` skaller
2005-12-09 2:15 ` Jacques Garrigue
2005-12-09 2:56 ` skaller
2005-12-09 15:26 ` malc
2005-12-10 0:49 ` Jacques Garrigue
2005-12-10 1:40 ` malc
2005-12-09 12:21 ` Andreas Rossberg
2005-12-09 17:17 ` skaller
2005-12-09 17:52 ` Andrej Bauer
2005-12-09 18:54 ` Andreas Rossberg [this message]
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