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From: =?UTF-8?Q?Milan_Stanojevi=C4=87?= <milanst@gmail.com>
Date: Thu, 19 Mar 2015 13:22:34 -0400
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To: =?UTF-8?B?RnLDqWTDqXJpYyBCb3Vy?= <frederic.bour@lakaban.net>
Cc: Caml List <caml-list@inria.fr>
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Subject: Re: [Caml-list] GADT existential escape

On Thu, Mar 19, 2015 at 1:15 PM, Fr=C3=A9d=C3=A9ric Bour
<frederic.bour@lakaban.net> wrote:
> Indeed, open variants can have type parameters.
> But exceptions really are sugar over a non-parameterized open variant.

If your OCaml version supports open variants, then exceptions and open
variants are exactly the same.
For example, this is legal code:
type exn +=3D Foo : 'a list -> exn