From: Jon Harrop <jon@ffconsultancy.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] annotations and type-checking
Date: Wed, 29 Jul 2009 00:28:29 +0100 [thread overview]
Message-ID: <200907290028.29488.jon@ffconsultancy.com> (raw)
In-Reply-To: <c413fcb70907281447l1f6c3d0y21c3fa024ac45791@mail.gmail.com>
On Tuesday 28 July 2009 22:47:25 Aaron Bohannon wrote:
> let f (x : 'a) : 'a = x in (f true, f 3);;
Err, good question. :-)
# let f : _ = fun x -> x in f true, f 3;;
- : bool * int = (true, 3)
# let f : 'a = fun x -> x in f true, f 3;;
Error: This expression has type int but is here used with type bool
I'm guessing the scope of the 'a is not what you'd expect but I have no idea
why. I'd have thought the latter would be a harmless type annotation...
Any takers?
--
Dr Jon Harrop, Flying Frog Consultancy Ltd.
http://www.ffconsultancy.com/?e
next prev parent reply other threads:[~2009-07-28 22:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-28 21:47 Aaron Bohannon
2009-07-28 23:28 ` Jon Harrop [this message]
2009-07-28 23:04 ` [Caml-list] " Philippe
2009-07-29 5:38 ` Johannes Kanig
2009-07-29 7:40 ` Mark Shinwell
2009-07-29 13:41 ` Aaron Bohannon
2009-07-29 14:39 ` Jacques Garrigue
2009-07-29 16:50 ` Aaron Bohannon
2009-07-29 19:01 ` Jon Harrop
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