From: Martin DeMello <martindemello@gmail.com>
To: "caml-list@inria.fr" <caml-list@inria.fr>
Subject: [Caml-list] intersections of polymorphic variants
Date: Thu, 9 Feb 2017 01:52:26 -0800 [thread overview]
Message-ID: <CAFrFfuFna+7-sSH2nqy5n+bDYPeCgSeK-RrzaTQYm7CrmEE1zw@mail.gmail.com> (raw)
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In the following code:
type color = [`Red | `Blue | `Green | `Black | `White]
let color_index c = match c with
| `Red -> 1
| `Blue -> 2
| `Green -> 3
| `Black -> 4
| `White -> 5
type value = [`Red | `Blue | `Green | `Missing]
type state = Color of int | Missing
let state_of_value v = match v with
| `Red -> Color (color_index `Red)
| `Blue -> Color (color_index `Blue)
| `Green -> Color (color_index `Green)
| `Missing -> Missing
is there any way to write the last function as
let state_of_value v = match v with
| `Red | `Blue | `Green -> ?????
| `Missing -> Missing
martin
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next reply other threads:[~2017-02-09 9:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 9:52 Martin DeMello [this message]
2017-02-09 9:57 ` Jeremy Yallop
2017-02-09 10:03 ` Martin DeMello
2017-02-09 15:15 ` Ashish Agarwal
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