From: Jeremie Dimino <jdimino@janestreet.com>
To: "Daniel Bünzli" <daniel.buenzli@erratique.ch>
Cc: "Milan Stanojević" <milanst@gmail.com>, Caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] GADT existential escape
Date: Thu, 19 Mar 2015 11:05:12 +0000 [thread overview]
Message-ID: <CANhEzE56HrXez4uqiRs0SfzWYY8o_1x7ynFvG9zRizgu41KHqQ@mail.gmail.com> (raw)
In-Reply-To: <A9833AA6DB2C40058D2E66B6A381E599@erratique.ch>
On Thu, Mar 19, 2015 at 10:44 AM, Daniel Bünzli
<daniel.buenzli@erratique.ch> wrote:
> tried to check, but Core fails on me in the toplevel
Core should work in the toplevel, why is it failing?
> Trying the following [1] self-contained implementation of the idea [1] the compiler still complains about escaping types.
You need to help the typer a bit:
let lookup : type a. dict -> a key -> a option = fun d k ->
let rec find = function
| [] -> None
| B (k', v) :: bs ->
match eq k k' with
| None -> find bs
| Some Eq -> Some (v :> a)
in
find d
--
Jeremie
next prev parent reply other threads:[~2015-03-19 11:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 0:29 Daniel Bünzli
2015-03-19 0:39 ` Milan Stanojević
2015-03-19 1:07 ` Daniel Bünzli
2015-03-19 1:27 ` Milan Stanojević
2015-03-19 10:44 ` Daniel Bünzli
2015-03-19 11:02 ` Jeremy Yallop
2015-03-19 11:34 ` Daniel Bünzli
2015-03-19 13:22 ` Daniel Bünzli
2015-03-19 16:46 ` Milan Stanojević
2015-03-19 17:14 ` Daniel Bünzli
2015-03-19 17:15 ` Frédéric Bour
2015-03-19 17:22 ` Milan Stanojević
2015-03-19 17:41 ` Jeremy Yallop
2015-03-19 18:29 ` Alain Frisch
2015-03-19 16:31 ` Milan Stanojević
2015-03-19 11:05 ` Jeremie Dimino [this message]
2015-03-19 11:34 ` Daniel Bünzli
2015-03-19 11:59 ` Jeremie Dimino
2015-03-20 13:50 ` Yaron Minsky
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