From: Max Mouratov <max.mouratov@outlook.com>
To: "Richard W.M. Jones" <rich@annexia.org>
Cc: "caml-list@inria.fr" <caml-list@inria.fr>
Subject: Re: [Caml-list] What if exn was not an open type?
Date: Sat, 4 Nov 2017 19:01:40 +0000 [thread overview]
Message-ID: <VI1PR0901MB13410BB3EBE44FB6C0E0E61A8F520@VI1PR0901MB1341.eurprd09.prod.outlook.com> (raw)
In-Reply-To: <20171104184401.3el2vbha2tgpvse5@annexia.org>
Saturday, November 4, 2017, 11:44:01 PM, Richard wrote:
> The problem is that the return statement could be called from many
> contexts, all with different types. The compiler expects to unify all
> these types (as the same type 'b) which is not possible.
See how it's done in Batteries:
type 'a t = 'a -> exn
let return label value =
raise (label value)
let label (type u) (f : u t -> u) : u =
let module M = struct exception Return of u end in
try f (fun x -> M.Return x)
with M.Return u -> u
next prev parent reply other threads:[~2017-11-04 19:01 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 9:56 Malcolm Matalka
2017-10-20 10:55 ` David Allsopp
2017-10-20 11:21 ` Ivan Gotovchits
2017-10-20 11:38 ` Simon Cruanes
2017-10-20 16:54 ` Malcolm Matalka
2017-10-20 19:47 ` Simon Cruanes
2017-10-21 21:15 ` Malcolm Matalka
2017-10-24 13:30 ` Richard W.M. Jones
2017-10-24 19:02 ` Petter A. Urkedal
2017-11-04 18:44 ` Richard W.M. Jones
2017-11-04 18:48 ` SP
2017-11-04 18:53 ` Richard W.M. Jones
2017-11-04 19:03 ` SP
2017-11-04 19:01 ` Max Mouratov [this message]
2017-11-04 19:16 ` octachron
2017-11-05 17:41 ` Richard W.M. Jones
2017-11-05 18:39 ` Yaron Minsky
2017-11-05 20:49 ` Gabriel Scherer
2017-11-05 21:48 ` Yaron Minsky
2017-11-05 21:53 ` Petter A. Urkedal
2017-11-05 18:02 ` Petter A. Urkedal
2017-11-05 18:24 ` Richard W.M. Jones
2017-11-05 18:55 ` Petter A. Urkedal
[not found] ` <CALa9pHQ-nhWf4T0U5gDiKTduPiEeXSZPQ=DY6N1YNbCXqRohPQ@mail.gmail.com>
2017-10-25 8:35 ` Richard W.M. Jones
2017-10-25 9:12 ` Philippe Veber
2017-10-25 14:52 ` Richard W.M. Jones
2017-10-25 16:37 ` Ivan Gotovchits
2017-10-25 17:47 ` SP
2017-10-26 8:06 ` Malcolm Matalka
2017-10-26 8:11 ` Xavier Leroy
2017-10-25 13:36 ` Ivan Gotovchits
2017-10-26 7:31 ` Petter A. Urkedal
2017-10-27 13:58 ` Oleg
2017-10-27 14:24 ` Philippe Veber
2017-10-27 14:49 ` Leo White
2017-11-01 7:16 ` Oleg
2017-11-04 17:52 ` Philippe Veber
2017-10-20 17:07 ` Malcolm Matalka
2017-10-21 21:28 ` Nathan Moreau
2017-10-22 12:39 ` Malcolm Matalka
2017-10-22 13:08 ` Nathan Moreau
2017-10-24 11:11 ` SP
2017-10-24 11:16 ` Gabriel Scherer
2017-10-25 11:30 ` Malcolm Matalka
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