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From: Nick Name <nick.name@inwind.it>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Is arrow programming impossible in ocaml?
Date: Tue, 14 Oct 2003 13:26:22 +0200	[thread overview]
Message-ID: <200310141326.22497.nick.name@inwind.it> (raw)
In-Reply-To: <20031014120246F.garrigue@kurims.kyoto-u.ac.jp>

Alle 05:02, martedì 14 ottobre 2003, Jacques Garrigue ha scritto:
> But as long as you represent arrows by normal functions (as this
> seems to be the case in the paper), eta-expanding should solve the
> problem.
>

Unfortunately I can't; I am using arrows to hide a function-like 
structure wich is more complex than functions

>   let a y = arr (fun x -> x) y
>
> Not also that there is no problem if Arr is a constructor:

I can't do this in general, either, because I need the (>>>) combinator, 
wich represents (reverse) function composition, so

type ('a,'b) t = Arr of ('a -> 'b) | Seq of ((('a,'c) t) * (('c,'b) t))

where Seq is the composition, is not writeable because I would need to 
make 'c a parameter for t, and then ('a,'c) t would no longer be valid 
etc.

Do anyone see another solution?

Thanks & bye

Vincenzo



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  reply	other threads:[~2003-10-14 11:21 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-13 23:59 Nick Name
2003-10-14  1:33 ` Oleg Trott
2003-10-14  3:02   ` Jacques Garrigue
2003-10-14 11:26     ` Nick Name [this message]
2003-10-15  0:22       ` Jacques Garrigue
2003-10-15  1:53         ` Nick Name
2003-10-15  2:20           ` Jacques Garrigue
2003-10-15 11:39             ` skaller
2003-10-14 10:37 ` skaller

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