From: "Eric C. Cooper" <ecc@cmu.edu>
To: caml-list@inria.fr
Subject: Re: [Caml-list] optional arguments and unification
Date: Tue, 3 Jun 2003 23:23:24 -0400 [thread overview]
Message-ID: <20030604032324.GA5986@ecooper.com> (raw)
In-Reply-To: <4.3.2.7.2.20030603195340.032a40e0@localhost>
On Tue, Jun 03, 2003 at 07:58:19PM -0700, Chris Hecker wrote:
> let f ?opt x = x + 1
> let g x = x + 1
> let h = if true then f else g
>
> This expression has type int -> int but is here used with type
> ?opt:'a -> int -> int
>
> So you have to do this:
>
> let h = if true then f ?opt:None else g
You could also write:
let h = if true then (fun x -> f x) else g
or even
let h = let f x = f x in if true then f else g
--
Eric C. Cooper e c c @ c m u . e d u
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prev parent reply other threads:[~2003-06-04 3:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-04 2:58 Chris Hecker
2003-06-04 3:23 ` Eric C. Cooper [this message]
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