From: Brian Rogoff <bpr@shell5.ba.best.com>
Subject: Re: signatures
Date: 1999/07/29
Date: 1999-07-29T00:00:00+00:00 [thread overview]
Message-ID: <Pine.BSF.4.10.9907292015080.15361-100000@shell5.ba.best.com> (raw)
In-Reply-To: Pine.A41.3.96-heb-2.07.990729214156.212760A-100000@pluto.mscc.huji.ac.il
On Thu, 29 Jul 1999, Ehud Lamm wrote:
> Suppose I want to ensure that a to be written set of routines all
> conform to a given signatre (let's say all sort routines have the
> signature
> generic
> type item is private;
> type list is array(positive range <>) of item;
> procedure sort (s:in out list);
> )?
>
> What is the preffered way of doing this?
My preferred way would be
generic
type Item_Type is private;
type List_Type is array(Positive range <>) of Item_Type;
with procedure Sort(S : in out List_Type) is <>;
package Sort_Signature is end;
then instantiate this with some types and a sort procedure. You can use
this package as a package parameter to an implementation package like the
following.
generic
with My_Sort is new Sort_Signature(<>);
package My_Package is
... etc
A very nice addition to Ada over Ada-83, these package parameters and
signature packages!
-- Brian
next prev parent reply other threads:[~1999-07-29 0:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-29 0:00 signatures Ehud Lamm
1999-07-29 0:00 ` Brian Rogoff [this message]
1999-08-01 0:00 ` signatures Ehud Lamm
1999-08-01 0:00 ` signatures James S. Rogers
1999-08-01 0:00 ` signatures Brian Rogoff
-- strict thread matches above, loose matches on Subject: below --
1988-12-07 16:36 signatures Stephe Leake
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