From: Christophe TROESTLER <debian00@tiscali.fr>
To: florentflament@aist.enst.fr
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] strange behavior with record type definition
Date: Sat, 12 Nov 2005 16:32:42 +0100 (CET) [thread overview]
Message-ID: <20051112.163242.20259664.debian00@tiscali.fr> (raw)
In-Reply-To: <4375FACF.3040906@aist.enst.fr>
On Sat, 12 Nov 2005, Florent <florentflament@aist.enst.fr> wrote:
>
> Ok but with these two record types defined :
> type t0 = { x : int ; y : int } ;;
> type t1 = { x : int } ;;
>
> There is no ambiguity about the following expression's type:
> { x = 0 ; y = 0 } ;;
> Why can't the t0 type be infered ?
As said by Nicolas, what would be the type of
let f r = { r with x = 1 }
> And with this function definition,
> let get_y (t:t0) = t.x ;;
> I explicitly say to the compiler that t is of type t0, so why does the
> compiler infer a t1 type when trying to get the x label of a t0 type value ?
Because (at this point) t.x implies t is of type t1. If you do not
care to access the fields of t0 after, just reorder your definitions:
type t0 = { x : int ; y : int }
let get_y t = t.x
type t1 = { x : int }
ChriS
next prev parent reply other threads:[~2005-11-12 15:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-11 22:59 Florent
2005-11-11 23:52 ` [Caml-list] " Jon Harrop
2005-11-12 0:15 ` Michael Wohlwend
2005-11-12 0:20 ` Martin Jambon
2005-11-12 10:58 ` Florent
2005-11-12 12:12 ` skaller
2005-11-12 12:20 ` Nicolas Cannasse
2005-11-12 12:51 ` skaller
2005-11-12 14:15 ` Michael Wohlwend
2005-11-12 14:45 ` skaller
2005-11-12 15:26 ` Christophe TROESTLER
2005-11-12 14:23 ` Florent
2005-11-12 15:32 ` Christophe TROESTLER [this message]
2005-11-12 16:50 ` Florian Weimer
2005-11-13 0:12 ` Jacques Garrigue
2005-11-13 12:50 ` Florent
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