From: dkristol@see-my.sig (David Kristola)
Subject: Re: Elimination of "use" clauses
Date: 1999/07/20
Date: 1999-07-20T00:00:00+00:00 [thread overview]
Message-ID: <7n0jrj$n5r1@svlss.lmms.lmco.com> (raw)
In-Reply-To: dale-1807991510420001@192.168.0.2
dale@cs.rmit.edu.au (Dale Stanbrough) writes:
>Richard D Riehle wrote:
>
>" >Good point. I wouldn't mind having a concise way of saying (eg) "T is
> >an integer type with just "+" and "-" operators. But I still prefer
> >"use type" to "package Ops".
>
> We agree up to a certain point. Explicit export directives would
> solve the problem, but that is not currently part of Ada. Again,
> "use type" is too broad, I think. "
>
>
>Export directives -could- do it (and it is not a bad idea at all),
>but we shouldn't forget that Ada already has the ability to export
>-just- the operators we want, and it's called using a private type
>and only advertising the appropriate operations.
>
>However this has the disadvantage that you can't use the private
>type in all the places that you might want to use an integer type.
>
>Dale
Can't "abstract" be used to remove the unwanted operators from
the original package?
function "*"(Left, Right : T) is abstract; -- eliminate multiplication
--djk, keeper of arcane lore & trivial fluff
Home: David95037 at aol dot com
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next prev parent reply other threads:[~1999-07-20 0:00 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-01 0:00 Elimination of "use" clauses Dr. Neil C. Audsley
1999-07-01 0:00 ` Joe Wisniewski
1999-07-01 0:00 ` czgrr
1999-07-01 0:00 ` Ted Dennison
1999-07-02 0:00 ` czgrr
1999-07-02 0:00 ` Ted Dennison
1999-07-01 0:00 ` Samuel T. Harris
1999-07-02 0:00 ` Robert Dewar
1999-07-02 0:00 ` Ted Dennison
1999-07-02 0:00 ` Stephen Leake
1999-07-02 0:00 ` Robert Dewar
[not found] ` <7ltus1$ah1@dfw-ixnews19.ix.netcom.com>
1999-07-13 0:00 ` Robert A Duff
1999-07-18 0:00 ` Richard D Riehle
1999-07-18 0:00 ` jerry
1999-07-19 0:00 ` Vladimir Olensky
1999-07-20 0:00 ` Richard D Riehle
1999-07-20 0:00 ` jerry
1999-07-20 0:00 ` Opaque Types (was Elimination of "use" clauses) David C. Hoos, Sr.
1999-07-18 0:00 ` Elimination of "use" clauses Dale Stanbrough
1999-07-20 0:00 ` David Kristola [this message]
1999-07-20 0:00 ` Richard D Riehle
1999-07-19 0:00 ` Brian Rogoff
1999-07-20 0:00 ` Robert Dewar
1999-07-20 0:00 ` Brian Rogoff
1999-07-21 0:00 ` Ted Dennison
1999-07-21 0:00 ` Robert A Duff
1999-07-21 0:00 ` Robert Dewar
1999-07-21 0:00 ` Robert Dewar
1999-07-21 0:00 ` Brian Rogoff
1999-07-22 0:00 ` Robert Dewar
1999-07-22 0:00 ` Brian Rogoff
1999-07-22 0:00 ` Robert Dewar
1999-07-22 0:00 ` Brian Rogoff
1999-07-21 0:00 ` Robert A Duff
1999-07-21 0:00 ` Michael F. Yoder
1999-07-21 0:00 ` Robert A Duff
1999-07-23 0:00 ` Tucker Taft
1999-08-03 0:00 ` Richard D Riehle
1999-07-19 0:00 ` Ted Dennison
1999-07-19 0:00 ` Tucker Taft
1999-07-19 0:00 ` Ted Dennison
1999-07-02 0:00 ` Ed Falis
1999-07-02 0:00 ` Ed Falis
1999-07-03 0:00 ` Joe Wisniewski
1999-07-03 0:00 ` Keith Thompson
1999-07-03 0:00 ` Ed Falis
1999-07-13 0:00 ` Peter Amey
1999-07-02 0:00 ` Samuel T. Harris
1999-07-02 0:00 ` Robert Dewar
1999-07-08 0:00 ` R. Tim Coslet
1999-07-09 0:00 ` Robert Dewar
1999-07-09 0:00 ` tmoran
[not found] ` <7ltl2q$mog$1@nnrp1.deja.com>
1999-07-08 0:00 ` Michael F. Yoder
1999-07-09 0:00 ` Richard D Riehle
1999-07-09 0:00 ` Michael F. Yoder
1999-07-09 0:00 ` Marin David Condic
1999-07-09 0:00 ` Robert Dewar
1999-07-09 0:00 ` Dale Stanbrough
1999-07-12 0:00 ` Robert Dewar
1999-07-12 0:00 ` Ted Dennison
1999-07-09 0:00 ` Michael F. Yoder
1999-07-14 0:00 ` Tucker Taft
1999-07-10 0:00 ` Simon Wright
1999-07-12 0:00 ` Robert Dewar
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