From: Matthieu Wipliez <mwipliez@yahoo.fr>
To: caml-list <caml-list@inria.fr>
Subject: Re : [Caml-list] Warning wished
Date: Wed, 28 Jan 2009 14:07:22 +0000 (GMT) [thread overview]
Message-ID: <739317.49579.qm@web27001.mail.ukl.yahoo.com> (raw)
In-Reply-To: <1233150828.7199.213.camel@localhost>
> Hello,
>
> Is it a bug or a well-known feature that the above program does not emit
> a warning (because "f x" should have type unit in the body of "g") ?
>
> =====
> let f x = x
> let g x = f x; 1
> (* let _ = g 2 *)
> ====
I'm not familiar with the internals of the compiler, but what I suppose is happening is that it tries to unify the type of "f x" and "unit", and this succeeds because "f x" has type 'a, which can be unified with anything. The meaning of "a;b" seems to be let _ = a in b rather than let () = a in b.
But like I said, these are suppositions.
Cheers,
Matthieu
>
> Best regards,
> Julien Signoles
>
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next prev parent reply other threads:[~2009-01-28 14:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-28 13:53 Julien SIGNOLES
2009-01-28 14:07 ` Matthieu Wipliez [this message]
2009-01-28 14:24 ` Re : [Caml-list] " Julien SIGNOLES
2009-01-28 20:56 ` Nicolas Pouillard
2009-01-28 14:10 ` Dmitri Boulytchev
2009-01-28 14:28 ` Julien SIGNOLES
2009-01-28 14:44 ` Dmitri Boulytchev
2009-01-28 18:29 ` Frédéric van der Plancke
2009-01-28 19:08 ` Dmitri Boulytchev
2009-01-28 16:55 ` Martin Jambon
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