From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Bus error
Date: Sat, 30 Jun 2007 11:40:13 -0400
Date: 2007-06-30T11:40:13-04:00 [thread overview]
Message-ID: <wccr6nt5u3m.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: 4686432a$0$14873$9b4e6d93@newsspool4.arcor-online.net
Georg Bauhaus <bauhaus.rm.tsoh@maps.futureapps.de> writes:
> Which IMHO defeats the purpose of well designed packages: focus on one
> thing. (A two dozen years old package like Text_IO formed around various
> assumptions might serve to construct an exception.)
> Why not use interfaces when you need to lump things together? Do you have
> a few convincing examples that show how the decoupling of modules should
> be "improved" with a mechanism of merging them into one? (That is, of
> importing and reexporting declarations of entire packages.)
I run across such cases fairly often.
Suppose I say:
package P is
type Int is range 1..10;
type Int_Array is array (...) of Int;
...
end P;
Clients that say "use P;" have visibility on two types, plus all kinds
of operations on those types (such as "=" on Int_Arrays).
Now suppose I want a growable array instead:
with ...;
package P is
type Int is range 1..10;
package Int_Vectors is new Ada.Containers.Vectors(Int, ...);
...
end P;
Now clients have to say "use P, P.Int_Vectors;" to get visibility on all
the relevant operations. Or else P has to rename whole bunch of stuff.
- Bob
next prev parent reply other threads:[~2007-06-30 15:40 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0367891DA5DA7E408D42A860FA002F44B0CC48@sma2901.cr.eurocopter.corp>
2007-06-29 9:35 ` AW: Bus error Duncan Sands
2007-06-29 12:55 ` Dmitry A. Kazakov
2007-06-29 15:37 ` Markus E Leypold
2007-06-29 15:44 ` Georg Bauhaus
2007-06-29 20:07 ` Dmitry A. Kazakov
2007-06-30 1:37 ` Robert A Duff
2007-06-30 8:44 ` Dmitry A. Kazakov
2007-06-30 11:52 ` Georg Bauhaus
2007-06-30 13:16 ` Georg Bauhaus
2007-06-30 14:31 ` Dmitry A. Kazakov
2007-06-30 18:07 ` Georg Bauhaus
2007-06-30 19:31 ` Robert A Duff
2007-07-01 9:07 ` Dmitry A. Kazakov
2007-06-30 15:40 ` Robert A Duff [this message]
2007-06-30 17:54 ` Georg Bauhaus
2007-07-02 8:01 ` Jean-Pierre Rosen
2007-07-02 12:00 ` Dmitry A. Kazakov
2007-07-02 12:30 ` Jean-Pierre Rosen
2007-07-02 14:22 ` Robert A Duff
2007-06-30 13:14 ` Georg Bauhaus
2007-06-30 14:31 ` Dmitry A. Kazakov
2007-06-30 15:34 ` Robert A Duff
2007-07-01 8:34 ` Dmitry A. Kazakov
2007-07-01 15:39 ` Robert A Duff
2007-07-01 19:41 ` Dmitry A. Kazakov
2007-06-30 15:29 ` Robert A Duff
2007-06-30 17:41 ` Georg Bauhaus
2007-06-30 13:31 ` Markus E Leypold
2007-07-02 0:16 ` Robert A Duff
2007-06-29 9:23 AW: " Grein, Christoph (Fa. ESG)
2007-06-29 10:17 ` Dmitry A. Kazakov
-- strict thread matches above, loose matches on Subject: below --
2007-06-27 14:23 Maciej Sobczak
2007-06-27 15:45 ` Georg Bauhaus
2007-06-27 17:19 ` Maciej Sobczak
2007-06-28 1:58 ` Robert A Duff
2007-06-28 20:06 ` Maciej Sobczak
2007-06-28 21:19 ` Robert A Duff
2007-06-29 8:05 ` Maciej Sobczak
2007-06-29 9:42 ` Georg Bauhaus
2007-06-29 16:59 ` Adam Beneschan
2007-06-30 12:33 ` Georg Bauhaus
2007-06-30 2:02 ` Robert A Duff
2007-06-29 8:04 ` Dmitry A. Kazakov
2007-06-27 20:02 ` Anh Vo
2007-06-27 20:48 ` Maciej Sobczak
2007-06-28 2:01 ` Robert A Duff
1990-08-27 23:48 BUS ERROR J o s e D u a r t e ! ! !
1990-08-16 14:52 saharbaugh%roo.dnet
1990-08-13 21:11 J o s e D u a r t e !!!
1990-08-10 12:32 bus error saharbaugh%roo.dnet
1990-08-09 14:50 saharbaugh%roo.dnet
1990-08-10 21:38 ` Chuck Peterson
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