From: Georg Bauhaus <bauhaus.rm.tsoh@maps.futureapps.de>
Subject: Re: Bus error
Date: Sat, 30 Jun 2007 13:52:22 +0200
Date: 2007-06-30T13:48:58+02:00 [thread overview]
Message-ID: <4686432a$0$14873$9b4e6d93@newsspool4.arcor-online.net> (raw)
In-Reply-To: <dg9w8bo1x1ve$.riaqkydp46n7.dlg@40tude.net>
Dmitry A. Kazakov wrote:
> On Fri, 29 Jun 2007 21:37:43 -0400, Robert A Duff wrote:
> If you have
>
> X1 : String renames Get_Line;
> X2 : String renames Get_Line;
> X3 : String renames Get_Line;
>
> the effect will be X1, X2, X3 all different objects. This should not be
> called renaming.
There happen to be no explicit arguments in the function calls.
Does the same reasoning apply to
X1 : String renames Get_Line(Foo);
X2 : String renames Get_Line(Bar);
X3 : String renames Get_Line(Baz, Mode => Frobnicate);
> But when I do:
>
> X : Element renames Collection (Key);
>
> I'd like to be certain that X indeed renames a container's element.
Then I think there is a problem of choosing the right name for
what you have called Collection here. Ada not being a declarative
language, and if Collection is a function, then the name of the
function should probably indicate what the function *does* if and
when you do care about how it achieves some purpose.
Something like Get_From_Collection(Key) seems more likely a good
name in this case.
I'd agree that there is a "reading level ambiguity" in
X : Data_Type renames Fun_Call_Result;
and
X : Fun_Decl renames Another_Fun;
> package My_IO is
> ...
> with new Ada.Text_IO.Integer_IO (...);
> -- Merge all declarations from this instance with My_Io's public
> -- and private parts
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.)
next prev parent reply other threads:[~2007-06-30 11:52 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 [this message]
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
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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