From: Anton Gibbs <anton@zooks.demon.co.uk>
Subject: Re: Implementing C/C++ style #include...
Date: Tue, 27 Mar 2001 19:51:56 +0100
Date: 2001-03-27T19:51:56+01:00 [thread overview]
Message-ID: <GwW+UBAMFOw6EwTM@zooks.demon.co.uk> (raw)
In-Reply-To: YBMv6.2967$fy.4691@www.newsranger.com
In article <YBMv6.2967$fy.4691@www.newsranger.com>, Ted Dennison
<dennison@telepath.com> writes
>In article <u7l1cgzpa.fsf@gsfc.nasa.gov>, Stephen Leake says...
>>
>>Not this one:
>>
>> function Ada_Size_Of_Input is new
>> Interfaces_C_More.Storage_Unit_Size_Of (Input_Type);
>>#if GNAT_Compiler
>> pragma Export (C, Ada_Size_Of_Input,
>> "ball_ct633_ada_size_of_input",
>> "ball_ct633_ada_size_of_input");
>>#elsif ObjectAda_Compiler
>> pragma Export (DLL_STDCALL, Ada_Size_Of_Input,
>> "ball_ct633_ada_size_of_input",
>> "ball_ct633_ada_size_of_input");
>>#end if;
>>
>>The difference is in the name of the Convention. Preprocessing is, in
>>this case, the best way to handle it. I believe the only alternative
>>is to reproduce the entire package spec, and change this one value.
>>Surely you do not claim that is better from a maintenance point of
>>view?
>
>If that's the only one, perhaps. But any time you are doing a pragma Import or
>Export, odds are you are doing several of them (or more). In that case, it may
>*still* be better from a maintenance point of view to have two copies of the
>file.
From a maintenance point of view, I think encouraging duplication of
source files is a very dangerous path to take. It is never long before
skewed changes creep in...
One example of pre-processing we use concerns the reporting of unhandled
exceptions. For our Ada83 targets we use the Telesoft (aka Alsys aka
Aonix) vendor-specific System.Report_Error (there is nothing else); and
for our Ada95 Targets we use the standard Ada95 features plus a bit of
GNAT.Symbolic.Traceback (I think it is called). You cannot encapsulate
all this in a package/procedure because the Telesoft System.Report_Error
call has to be the first line in the exception handler. I would not
dream of allowing two separate copies of the source file to be made in
these circumstances.
--
Anton Gibbs
next prev parent reply other threads:[~2001-03-27 18:51 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-13 18:37 Better support for garbage collection Nick Roberts
2001-03-14 8:16 ` Florian Weimer
2001-03-14 18:52 ` Robert A Duff
2001-03-14 19:40 ` Florian Weimer
2001-03-15 13:18 ` Nick Roberts
2001-03-14 19:29 ` Robert A Duff
2001-03-14 20:59 ` Brian Rogoff
2001-03-16 16:42 ` Robert A Duff
2001-03-17 6:13 ` Lao Xiao Hai
2001-03-24 4:08 ` Brian Rogoff
2001-03-15 4:35 ` Nick Roberts
2001-03-15 21:37 ` Randy Brukardt
2001-03-15 22:36 ` Stephen Leake
2001-03-16 16:26 ` Robert A Duff
2001-03-16 16:59 ` Brian Rogoff
2001-03-16 17:31 ` Robert A Duff
2001-03-16 18:29 ` Brian Rogoff
2001-03-17 2:30 ` Nick Roberts
2001-03-17 21:59 ` Robert A Duff
2001-03-17 22:57 ` Static typing (Was Re: Better support for garbage collection) Brian Rogoff
2001-03-17 23:45 ` Robert A Duff
2001-03-18 0:58 ` Brian Rogoff
2001-03-19 15:24 ` Robert A Duff
2001-03-20 4:21 ` Brian Rogoff
2001-03-21 1:32 ` Ken Garlington
2001-03-21 13:28 ` Robert A Duff
2001-03-22 2:08 ` Ken Garlington
2001-03-22 16:40 ` Robert A Duff
2001-03-25 16:21 ` Ken Garlington
2001-03-25 16:56 ` Ken Garlington
2001-03-25 22:31 ` Robert A Duff
2001-03-27 0:24 ` Ken Garlington
2001-03-28 23:15 ` Robert A Duff
2001-03-29 5:02 ` Ken Garlington
2001-03-29 6:13 ` David Starner
2001-03-29 10:10 ` AG
2001-03-29 14:28 ` Ken Garlington
2001-03-29 23:46 ` Robert A Duff
2001-03-30 3:41 ` Ken Garlington
2001-03-30 21:21 ` Robert A Duff
2001-03-31 19:30 ` Ken Garlington
2001-04-02 15:27 ` Robert A Duff
2001-04-02 23:29 ` Ken Garlington
2001-03-30 21:29 ` Robert A Duff
2001-03-30 9:16 ` Dmitry Kazakov
2001-03-30 9:51 ` Florian Weimer
2001-04-02 8:54 ` Dmitry Kazakov
2001-03-30 16:13 ` Ken Garlington
2001-04-02 11:00 ` Dmitry Kazakov
2001-03-30 20:44 ` Robert C. Leif, Ph.D.
2001-04-02 11:29 ` Dmitry Kazakov
2001-04-02 13:15 ` Robert A Duff
2001-04-03 8:57 ` Dmitry Kazakov
2001-03-27 2:39 ` Andrew Berg
2001-03-27 3:33 ` Ken Garlington
2001-03-27 14:23 ` Robert A Duff
2001-03-27 23:36 ` Ken Garlington
2001-03-29 23:50 ` Robert A Duff
2001-03-19 18:24 ` Better support for garbage collection Tucker Taft
[not found] ` <87bsr46kxv.fsf@deneb.enyo.de>
2001-03-15 14:18 ` Robert A Duff
2001-03-15 16:36 ` Florian Weimer
2001-03-14 22:05 ` Laurent Guerby
2001-03-16 16:47 ` Robert A Duff
2001-03-16 19:46 ` Laurent Guerby
2001-03-16 20:10 ` Robert A Duff
2001-03-17 13:14 ` Support for per allocation pool selection (was: Better support for garbage collection) Laurent Guerby
2001-03-17 17:06 ` Robert A Duff
2001-03-17 19:19 ` Florian Weimer
2001-03-17 21:10 ` Robert A Duff
2001-03-15 17:56 ` Better support for garbage collection Ray Blaak
2001-03-21 16:15 ` Implementing C/C++ style #include bhazzard
2001-03-21 16:45 ` Marin David Condic
2001-03-22 15:13 ` Ira D. Baxter
2001-03-22 15:23 ` Marin David Condic
2001-03-25 15:45 ` Anton Gibbs
2001-03-26 14:24 ` Ted Dennison
2001-03-26 15:00 ` Marin David Condic
2001-03-26 14:49 ` Marin David Condic
2001-03-26 18:19 ` Stephen Leake
2001-03-26 18:44 ` Pascal Obry
2001-03-26 21:44 ` Robert A Duff
2001-03-27 3:02 ` Andrew Berg
2001-03-27 3:27 ` Phaedrus
2001-03-27 17:41 ` Pascal Obry
2001-03-26 19:18 ` Ted Dennison
2001-03-27 18:51 ` Anton Gibbs [this message]
2001-03-26 19:35 ` Marin David Condic
2001-03-26 23:04 ` Mark Lundquist
2001-03-27 14:38 ` Marin David Condic
2001-03-26 16:12 ` Florian Weimer
2001-03-26 17:34 ` David Starner
2001-03-26 22:25 ` Florian Weimer
2001-03-27 3:29 ` David Starner
2001-03-26 18:23 ` Stephen Leake
2001-03-26 22:34 ` Florian Weimer
2001-03-27 7:34 ` Ole-Hjalmar Kristensen
2001-03-27 12:43 ` Dale Stanbrough
2001-03-27 14:40 ` Marin David Condic
2001-03-27 15:01 ` Ted Dennison
2001-03-27 13:20 ` Preben Randhol
2001-03-23 17:39 ` Wes Groleau
2001-03-21 18:07 ` Mark Lundquist
2001-03-22 12:50 ` Chris M. Moore
2001-03-22 14:30 ` Marin David Condic
2001-03-22 21:15 ` singlespeeder
2001-03-22 21:42 ` Marin David Condic
2001-03-23 14:43 ` Georg Bauhaus
2001-03-23 18:51 ` Marin David Condic
2001-03-22 15:02 ` Pat Rogers
2001-03-22 15:28 ` Marin David Condic
2001-03-22 16:32 ` Chris M. Moore
2001-03-22 16:57 ` Robert A Duff
2001-03-26 16:13 ` Martin Dowie
2001-03-26 22:55 ` Phaedrus
2001-03-27 1:36 ` tmoran
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