From: Carl Eastlund <ceastlund@janestreet.com>
To: Ashish Agarwal <agarwal1975@gmail.com>
Cc: Caml List <caml-list@inria.fr>
Subject: Re: [Caml-list] selecting GADT parameter
Date: Fri, 31 Jul 2015 09:57:04 -0400 [thread overview]
Message-ID: <CALyFioTi2cLvUioFh_a3s8M1Ve=7bDTpMpCo8mzePV3b=z63SQ@mail.gmail.com> (raw)
In-Reply-To: <CAMu2m2J+qrKwxOO+yoV9fLaPFd39tG7terwE3djzarWwO6_v6w@mail.gmail.com>
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Perhaps like this? (Caveat: I typed this straight into gmail, I haven't
tried to compile or run this code at all.)
type ('a, 'b, 'c) tag =
| Tag1 : ('a, int, int) tag
| Tag2 : ('a, string, 'a) tag
type 'a t =
| Foo : ('a, 'b, 'c) tag * 'a * 'b -> 'c t
On Fri, Jul 31, 2015 at 9:48 AM, Ashish Agarwal <agarwal1975@gmail.com>
wrote:
> I have:
>
> type _ t =
> | Foo1 : 'a * int -> int t
> | Foo2 : 'a * string -> 'a t
>
> but I really want to merge these two cases. I want the return type to be
> based on the second arg when the second arg is int, and be based on the
> first arg otherwise. Any way to accomplish that?
>
>
--
Carl Eastlund
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next prev parent reply other threads:[~2015-07-31 13:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-31 13:48 Ashish Agarwal
2015-07-31 13:57 ` Carl Eastlund [this message]
2015-07-31 14:18 ` Ashish Agarwal
2015-07-31 14:31 ` Lukasz Stafiniak
2015-07-31 14:33 ` Runhang Li
2015-08-04 9:21 ` Goswin von Brederlow
2015-08-05 17:26 ` Ashish Agarwal
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