From: "Daniel Bünzli" <daniel.buenzli@erratique.ch>
To: Misha Aizatulin <avatar@hot.ee>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] typechecking
Date: Sat, 22 Mar 2014 21:40:15 +0100 [thread overview]
Message-ID: <2E564C20A45F40FFA6BDB6946F088F03@erratique.ch> (raw)
In-Reply-To: <532DEC4E.6040505@hot.ee>
Le samedi, 22 mars 2014 à 21:02, Misha Aizatulin a écrit :
> type t1 = T1
> type t2 = T2
>
> let f T2 = ()
>
> let input (c : in_channel) : t1 =
> let t = input_value c in
> f t;
> t
Unmarshaling is not type-safe, you always need to add a type annotation when you input_value. See the warning in the documentation here [1]. Your program should read:
type t1 = T1
type t2 = T2
let f T2 = ()
let input (c : in_channel) : t1 =
let t = (input_value c : t1) in
f t;
t
Which the compiler rejects.
Best,
Daniel
[1] http://caml.inria.fr/pub/docs/manual-ocaml-4.01/libref/Marshal.html
next prev parent reply other threads:[~2014-03-22 20:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-22 20:02 Misha Aizatulin
2014-03-22 20:40 ` Daniel Bünzli [this message]
2014-03-22 22:12 ` Yaron Minsky
2014-03-22 22:24 ` Jonathan Protzenko
2014-03-23 4:41 ` oleg
2014-03-23 12:59 ` Jacques Garrigue
2014-03-24 8:46 ` Alain Frisch
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