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From: Maciej Sobczak <see.my.homepage@gmail.com>
Subject: Re: Teaching C/C++ from Ada perspective?
Date: Wed, 4 Jul 2018 00:59:50 -0700 (PDT)
Date: 2018-07-04T00:59:50-07:00	[thread overview]
Message-ID: <da7000f7-7583-4119-b21e-87117b67b048@googlegroups.com> (raw)
In-Reply-To: <f7878185-925d-4752-9b3f-75506cce7deb@googlegroups.com>

> page 335 in §6.2 C++ Constructs and * Compile-Time Coupling:
> * The word ‘excessive’ is practically screamed in context here, as in:  C++ headers' excessive compile-time coupling.

The coupling is exactly the same as in Ada, where a change in the *private* part of the package specification forces all clients to be recompiled, even though they are presumably not affected by such modifications. The object model is the same in both Ada and C++, which means that the compiler needs the same kind of knowledge about how types and objects are structured.
There is absolutely no difference between C++ and Ada here.

> Janus Ada and Visual Studio C++ are exactly the same compiler, eh?  who knew?

GCC and GCC are exactly the same compiler. Interestingly, bragging about that was a marketing strategy to convince potential customers to try Ada.
Now, Janus Ada and VC++ might be different, but I doubt they substantially differ in how they treat files as the physical source code items. I also guess that reading text files is what Ada and C++ front-ends of GCC do similarly.
Stop trolling.

> ••C++ objects have a phenomenal tendency to get tangled up in each other••.

Ada somehow it was necessary to invent "limited with" for Ada. The motivation for this, as explained in the Ada textbooks, was exactly to deal with the problem of cyclic dependencies.
Stop trolling.

> Ada specifications do not utilize primitive header-file textual inclusion mechanisms.

They do, they are just a little bit smarter in how they do it by forcing names to be declared within packages. This is the added value in Ada, but easy to replicate in C++. In any case, the compile-time coupling is present in both languages and can be seen when some root package spec is updated in a large project.

For other citations, you have failed (or rather did not even attempt) to demonstrate that the given challenges do not appear in Ada and so you did not convince me.

> Lakos's physical design is omitted by nearly all C++ coursework

Sure. The physical design challenges become relevant in codebases that span millions of lines of code. Typical students do not produce that much during their homeworks in a one-semester courses and there are more important things to teach that they will need earlier.

BTW - my favorite argument in such discussions is that by writing your posts you are relying on multiple large-scale C++ software systems working properly. Feel free to keep ignoring it.

-- 
Maciej Sobczak * http://www.inspirel.com


  reply	other threads:[~2018-07-04  7:59 UTC|newest]

Thread overview: 117+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-30 18:04 Teaching C/C++ from Ada perspective? kouaoua16
2018-06-30 18:15 ` Luke A. Guest
2018-06-30 19:27   ` Dan'l Miller
2018-06-30 19:07 ` Dan'l Miller
2018-07-01 16:12 ` kouaoua16
2018-07-01 17:08   ` Luke A. Guest
2018-07-01 19:19     ` Dan'l Miller
2018-07-02  6:12       ` Maciej Sobczak
2018-07-01 20:52 ` Maciej Sobczak
2018-07-01 21:35   ` Dan'l Miller
2018-07-02  5:56     ` Maciej Sobczak
2018-07-02  9:58       ` Marius Amado-Alves
2018-07-02 11:03         ` Maciej Sobczak
2018-07-02 13:52           ` Marius Amado-Alves
2018-07-04 12:10             ` Dan'l Miller
2018-07-02 20:14         ` Paul Rubin
2018-07-03  9:48           ` Marius Amado-Alves
2018-07-04  2:52             ` Paul Rubin
2018-07-02 18:52       ` Dan'l Miller
2018-07-03  8:00         ` Maciej Sobczak
2018-07-03 12:40           ` Dan'l Miller
2018-07-03 20:54             ` Maciej Sobczak
2018-07-04  3:10               ` Dan'l Miller
2018-07-04  7:59                 ` Maciej Sobczak [this message]
2018-07-04  8:37                   ` Marius Amado-Alves
2018-07-04 12:22                     ` Maciej Sobczak
2018-07-04 14:13                       ` Simon Wright
2018-07-04 14:56                         ` Maciej Sobczak
2018-07-04 15:52                           ` Dmitry A. Kazakov
2018-07-04 16:24                             ` Alejandro R. Mosteo
2018-07-04 20:00                               ` Jeffrey R. Carter
2018-07-05 18:35                                 ` Randy Brukardt
2018-07-05 19:39                                   ` Jeffrey R. Carter
2018-07-06 18:45                                     ` Randy Brukardt
2018-07-04 20:13                             ` Maciej Sobczak
2018-07-04 21:09                               ` Dmitry A. Kazakov
2018-07-05  5:49                                 ` Maciej Sobczak
2018-07-05  7:37                                   ` Dmitry A. Kazakov
2018-07-05 13:14                                     ` Maciej Sobczak
2018-07-05 15:18                                       ` Dmitry A. Kazakov
2018-07-05 19:16                                       ` Randy Brukardt
2018-07-07 15:09                                         ` Lucretia
2018-07-05 19:12                                     ` Randy Brukardt
2018-07-05 20:10                                       ` Maciej Sobczak
2018-07-06 19:01                                         ` Randy Brukardt
2018-07-06 19:35                                           ` Dmitry A. Kazakov
2018-07-05  7:43                                   ` Alejandro R. Mosteo
2018-07-05 18:53                                   ` Randy Brukardt
2018-07-05 19:06                                     ` Dan'l Miller
2018-07-06 18:47                                       ` Randy Brukardt
2018-07-05 20:12                                     ` Maciej Sobczak
2018-07-06 18:51                                       ` Randy Brukardt
2018-07-06 19:43                                         ` Dmitry A. Kazakov
2018-07-06 20:18                                           ` Dan'l Miller
2018-07-07  8:39                                             ` Dmitry A. Kazakov
2018-07-07 11:53                                           ` Björn Lundin
2018-07-06 20:22                                         ` Maciej Sobczak
2018-07-06 23:26                                           ` Paul Rubin
2018-07-07  6:17                                             ` J-P. Rosen
2018-07-07  6:37                                               ` Micronian Coder
2018-07-07  8:48                                                 ` Privacy and child packages (Was: Teaching C/C++ from Ada perspective?) Jacob Sparre Andersen
2018-07-07 20:19                                               ` Teaching C/C++ from Ada perspective? Maciej Sobczak
2018-07-08 15:25                                           ` Simon Wright
2018-07-08 20:00                                             ` Maciej Sobczak
2018-07-09  9:04                                               ` Alejandro R. Mosteo
2018-07-05 15:30                               ` Dan'l Miller
2018-07-05 20:38                                 ` Maciej Sobczak
2018-07-05 21:05                                   ` Dan'l Miller
2018-07-05 18:47                               ` Randy Brukardt
2018-07-04 16:01                           ` Simon Wright
2018-07-04 17:12                           ` G. B.
2018-07-04 20:18                             ` Maciej Sobczak
2018-07-04 21:03                               ` G.B.
2018-07-04 17:21                           ` Dan'l Miller
2018-07-04 20:36                             ` Maciej Sobczak
2018-07-04 22:44                               ` Dan'l Miller
2018-07-05  2:01                                 ` Luke A. Guest
2018-07-05  5:03                                   ` Dan'l Miller
2018-07-05  5:58                                 ` Maciej Sobczak
2018-07-05 19:25                                   ` Randy Brukardt
2018-07-05 19:22                                 ` Randy Brukardt
2018-07-05 18:31                       ` Randy Brukardt
2018-07-06  3:32           ` Dan'l Miller
2018-07-06 12:05             ` Dan'l Miller
2018-07-06 20:42             ` Maciej Sobczak
2018-07-06 21:32               ` Dan'l Miller
2018-07-07 20:43                 ` Maciej Sobczak
2018-07-08 17:36                   ` Dan'l Miller
2018-07-08 18:39                     ` Bill Findlay
2018-07-08 19:28                       ` Dan'l Miller
2018-07-09 12:34                         ` Bill Findlay
2018-07-09 15:19                           ` Dan'l Miller
2018-07-09 19:34                             ` Bill Findlay
2018-07-09 22:03                               ` Dan'l Miller
2018-07-09 22:35                                 ` Bill Findlay
2018-07-10  1:56                                   ` Lucretia
2018-07-10 23:14                         ` Randy Brukardt
2018-07-11 14:05                           ` Dan'l Miller
2018-07-11 20:20                             ` Randy Brukardt
2018-07-08 20:43                     ` Maciej Sobczak
2018-07-08 23:17                       ` Dan'l Miller
2018-07-09  6:13                         ` Maciej Sobczak
2018-07-09 16:35                           ` Dan'l Miller
2018-07-10 23:20                       ` Randy Brukardt
2018-07-10 23:51                         ` Britt
2018-07-02 17:10   ` kouaoua16
2018-07-02 17:28     ` Dennis Lee Bieber
2018-07-02 18:22     ` Maciej Sobczak
2018-07-02 20:27     ` G.B.
2018-07-02  0:11 ` Paul Rubin
2018-07-02 14:26 ` kouaoua16
2018-07-02 19:57 ` G.B.
2018-07-02 20:17   ` Dan'l Miller
2018-07-03  9:56 ` Brian Drummond
2018-07-04 12:18 ` Olivier Henley
2018-07-04 14:17   ` kouaoua16
2018-07-12  5:38 ` robin.vowels
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