From: "J-P. Rosen" <rosen@adalog.fr>
Subject: Re: How can I create an empty array of a generic type?
Date: Sat, 13 Jul 2019 07:24:10 +0200
Date: 2019-07-13T07:24:10+02:00 [thread overview]
Message-ID: <qgbptp$u95$1@dont-email.me> (raw)
In-Reply-To: <lnftnaa80u.fsf@kst-u.example.com>
Le 13/07/2019 à 06:11, Keith Thompson a écrit :
> generic
> type Element_Type is private;
> type Key_Component_Type is private;
> with function "<" (Left, Right : Key_Component_Type) return Boolean is <>;
> with function "=" (Left, Right : Element_Type) return Boolean is <>;
> package Ternary_Trees is
> type Key_Type is array(Positive range <>) of Key_Component_Type;
> private
> Dummy: Key_Component_Type;
> Empty_Key : constant Key_Type(1..0) := (others => Dummy);
> end Ternary_Trees;
>
> The Dummy value is a bit ugly.
You can avoid it:
Empty_Key : constant Key_Type(1..0) := (others => <>);
--
J-P. Rosen
Adalog
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Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00
http://www.adalog.fr
next prev parent reply other threads:[~2019-07-13 5:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-13 3:36 How can I create an empty array of a generic type? b.mcguinness747
2019-07-13 4:11 ` Keith Thompson
2019-07-13 5:24 ` J-P. Rosen [this message]
2019-07-13 21:19 ` Keith Thompson
2019-07-14 11:09 ` reinert
2019-07-14 11:15 ` reinert
2019-07-14 11:27 ` Jeffrey R. Carter
2019-07-14 12:49 ` J-P. Rosen
2019-07-13 21:02 ` b.mcguinness747
2019-07-14 16:41 ` bj.mooremr
2019-10-16 2:03 ` Andrew Shvets
2019-10-16 4:49 ` Egil H H
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