From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: Why are Ada compilers difficult to write ?
Date: Fri, 29 Jun 2018 16:43:48 -0500
Date: 2018-06-29T16:43:48-05:00 [thread overview]
Message-ID: <ph696k$3ir$1@franka.jacob-sparre.dk> (raw)
In-Reply-To: 2d287ba3-209d-4d6a-af79-77177a137885@googlegroups.com
"Dan'l Miller" <optikos@verizon.net> wrote in message
news:2d287ba3-209d-4d6a-af79-77177a137885@googlegroups.com...
...
>Well, in an alternate universe, there would be a way to accomplish
>those declarations of constants or variables in the same package as
>their subtypes.
Surely.
But Ada 83 had a goal that Ada text would be processed linearly. It didn't
quite achieve that (see visibility of goto labels), but it's close. This
goal has been preserved in all more recent revisions of the language.
This goal wasn't adopted to make it easier to write compilers (although it
sometimes has that effect), but rather to make it easier to *read* Ada code
(ease of reading being one of Ada's primary goals). In general, you don't
have to read anything following a declaration to determine how it will be
implemented and execute.
Randy.
next prev parent reply other threads:[~2018-06-29 21:43 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-19 21:33 Why are Ada compilers difficult to write ? Vincent
2018-06-19 21:43 ` Paul Rubin
2018-06-19 22:11 ` Lucretia
2018-06-24 17:33 ` Paul Rubin
2018-06-24 17:39 ` Lucretia
2018-06-19 22:01 ` Jacob Sparre Andersen
2018-06-19 22:18 ` Lucretia
2018-06-21 14:02 ` Jacob Sparre Andersen
2018-06-21 17:20 ` Lucretia
2018-06-19 22:17 ` Lucretia
2018-06-19 22:34 ` Dan'l Miller
2018-06-22 13:01 ` Alejandro R. Mosteo
2018-06-20 8:33 ` gautier_niouzes
2018-06-20 15:54 ` Jeffrey R. Carter
2018-06-20 17:54 ` Dan'l Miller
2018-06-20 18:18 ` Dan'l Miller
2018-06-20 18:58 ` Luke A. Guest
2018-06-20 19:37 ` Dan'l Miller
2018-06-20 19:39 ` Dan'l Miller
2018-06-20 19:50 ` Dan'l Miller
2018-06-20 21:26 ` Luke A. Guest
2018-06-27 14:19 ` Olivier Henley
2018-06-27 15:34 ` Dan'l Miller
2018-06-27 16:26 ` Olivier Henley
2018-06-27 16:50 ` Dan'l Miller
2018-06-27 17:53 ` Olivier Henley
2018-06-27 18:49 ` Dan'l Miller
2018-06-28 11:54 ` Mehdi Saada
2018-06-29 3:34 ` Paul Rubin
2018-06-29 16:36 ` G. B.
2018-06-29 17:02 ` Dan'l Miller
2018-06-21 10:44 ` Marius Amado-Alves
2018-06-21 12:45 ` Dan'l Miller
2018-06-21 21:08 ` Paul Rubin
2018-06-21 21:42 ` Dan'l Miller
2018-06-21 22:01 ` Simon Wright
2018-06-21 23:04 ` Dan'l Miller
2018-06-22 0:20 ` Dan'l Miller
2018-06-22 3:41 ` Paul Rubin
2018-06-29 21:19 ` Randy Brukardt
2018-06-22 3:44 ` Paul Rubin
2018-06-22 21:57 ` Dan'l Miller
2018-06-22 23:15 ` Luke A. Guest
2018-06-23 1:03 ` Dan'l Miller
2018-06-23 1:49 ` Luke A. Guest
2018-06-23 2:54 ` Dan'l Miller
2018-06-23 14:48 ` Dennis Lee Bieber
2018-06-23 14:41 ` Dennis Lee Bieber
2018-06-25 5:55 ` Simon Clubley
2018-06-29 21:22 ` Randy Brukardt
2018-06-22 3:31 ` Paul Rubin
2018-06-22 16:44 ` antispam
2018-06-22 13:11 ` Lucretia
2018-06-22 17:10 ` Simon Clubley
2018-06-22 18:00 ` Lucretia
2018-06-25 5:48 ` Simon Clubley
2018-06-25 8:46 ` Alejandro R. Mosteo
2018-06-25 13:23 ` Lucretia
2018-06-25 17:24 ` Simon Clubley
2018-06-25 14:59 ` Dan'l Miller
2018-06-25 17:32 ` Simon Clubley
2018-06-29 21:26 ` Randy Brukardt
2018-06-23 5:56 ` J-P. Rosen
2018-06-23 12:44 ` Dan'l Miller
2018-06-23 16:14 ` Shark8
2018-06-23 18:12 ` Dan'l Miller
2018-06-23 18:47 ` Shark8
2018-06-23 19:35 ` Simon Wright
2018-06-25 8:51 ` Alejandro R. Mosteo
2018-06-24 13:41 ` Jacob Sparre Andersen
2018-06-25 6:04 ` Simon Clubley
2018-06-25 6:31 ` Jacob Sparre Andersen
2018-06-25 13:27 ` Lucretia
2018-06-25 20:07 ` Dirk Craeynest
2018-06-28 12:08 ` Vincent
2018-06-28 12:21 ` Simon Wright
2018-06-28 12:24 ` Luke A. Guest
2018-06-28 12:41 ` Dan'l Miller
2018-06-28 14:43 ` J-P. Rosen
2018-06-28 18:26 ` Dmitry A. Kazakov
2018-06-29 21:35 ` Randy Brukardt
2018-06-29 21:29 ` Randy Brukardt
2018-06-21 17:42 ` Pascal Obry
2018-06-21 20:18 ` Dan'l Miller
2018-06-22 5:01 ` J-P. Rosen
2018-06-22 7:16 ` Dmitry A. Kazakov
2018-06-22 11:46 ` Dan'l Miller
2018-06-22 12:11 ` Dmitry A. Kazakov
2018-06-22 12:35 ` Dan'l Miller
2018-06-22 15:55 ` Dmitry A. Kazakov
2018-06-29 21:43 ` Randy Brukardt [this message]
2018-06-25 15:33 ` Dan'l Miller
2018-10-01 18:09 ` Tucker Taft
2018-10-01 18:51 ` Lucretia
2018-10-02 12:58 ` Alejandro R. Mosteo
2018-10-02 14:23 ` Lucretia
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