From: Jacques Le Normand <rathereasy@gmail.com>
To: caml-list caml-list <caml-list@yquem.inria.fr>
Subject: obj.magic for polymorphic record fields
Date: Sun, 20 Dec 2009 12:44:57 -0500 [thread overview]
Message-ID: <f74178430912200944w28145e73vebbe43912fcc5ea4@mail.gmail.com> (raw)
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Dear ocaml-list,
the following code does not type check:
type foo = {bar : 'a. 'a -> 'a}
let a : int -> int = fun x -> x
let baz = {bar = Obj.magic a}
with the error
Error: This field value has type 'a -> 'a which is less general than
'b. 'b -> 'b
my question is: how could I use obj.magic to get a polymorphic type?
Jacques
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next reply other threads:[~2009-12-20 17:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-20 17:44 Jacques Le Normand [this message]
2009-12-20 18:17 ` [Caml-list] " Nicolas Pouillard
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