From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: little precision about anonymous access types
Date: Wed, 21 Mar 2018 17:46:06 -0500
Date: 2018-03-21T17:46:06-05:00 [thread overview]
Message-ID: <p8unbg$soe$1@franka.jacob-sparre.dk> (raw)
In-Reply-To: 42387d28-c983-4e58-9522-815ccd1ad0fb@googlegroups.com
"Mehdi Saada" <00120260a@gmail.com> wrote in message
news:42387d28-c983-4e58-9522-815ccd1ad0fb@googlegroups.com...
> It sounds interesting. Could you explain a bit more what effect you refer
> to ? Some code to show it ? Or a link to it.
> For the time being, the few things I know is that anonymous types are
> useful and safe for : coextensions, and controlling access
> parameters/results and the dispatching they allow.
> So if you allude to dispatching, I might understand your point (a bit),
> otherwise I don't.
Yikes. Anonymous access type act differently than their named counterparts
in the following cases (to name a few):
(1) Hard to set the convention, pre/postconditions, other aspects
(because there's no declaration);
(2) Accessibility for anonymous access parameters (both objects and
subprograms), discriminants, stand-alone objects;
(3) Full context passed with anonymous access-to-subprogram parameters;
(4) Dynamic accessibility causes a "tripping hazard" (Program_Error with
some actual parameters) - access parameters, stand-alone objects.
(5) Hidden null exclusion for controlling anonymous access parameters.
Randy.
next prev parent reply other threads:[~2018-03-21 22:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-19 0:37 little precision about anonymous access types Mehdi Saada
2018-03-19 1:08 ` Mehdi Saada
2018-03-19 1:18 ` Mehdi Saada
2018-03-19 14:51 ` AdaMagica
2018-03-19 22:40 ` Randy Brukardt
2018-03-20 17:49 ` G. B.
2018-03-20 23:56 ` Mehdi Saada
2018-03-21 22:46 ` Randy Brukardt [this message]
2018-05-15 0:20 ` Mehdi Saada
2018-05-15 0:28 ` Mehdi Saada
2018-05-15 21:48 ` Randy Brukardt
2018-05-16 8:14 ` Mehdi Saada
2018-05-16 8:23 ` Mehdi Saada
2018-05-17 21:20 ` Randy Brukardt
2018-05-17 21:17 ` Randy Brukardt
2018-05-17 21:36 ` J-P. Rosen
2018-05-18 7:44 ` Dmitry A. Kazakov
2018-05-15 21:44 ` Randy Brukardt
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