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From: Vincent Marciante <marciant_remove@li.net>
Subject: Re: Assigning the value of a deferred constant?
Date: Tue, 18 Sep 2001 22:07:28 -0400
Date: 2001-09-18T22:07:28-04:00	[thread overview]
Message-ID: <3BA7FDE0.82D@li.net> (raw)
In-Reply-To: 3BA79539.D7FEA4A9@adaworks.com

Richard Riehle wrote:
> 
> Ted Dennison wrote:
> 
> > In article <d7abqt09p6i75u5nf014dbge4o11a0534r@4ax.com>, Juanma Barranquero
> > says...
> >
> > >And vaguely related: Is there any way to declare a deferred constant
> > >and assign its value in the body of the declaring package, during
> > >elaboration? Something like:
> >
> > Sure. Declare it as a function instead of a constant.
> 
> Ted makes an important point.   Except for limited types, deferred constants
> should be promoted to functions.   In fact, it seems this is now a good policy
> for most named numbers and declared values.   This leverages one of the
> more powerful aspects of Ada:  the ability to defer the implementation of
> a value to the body of a package.   It also goes a long way towared satisfying
> the principle of referential transparency.
> 
> Richard Riehle
> richard@adaworks.com

But a deferred contant might be completed by a static expression,
making its use legal in more places than where a function call is legal
-
right?

Vinny



  reply	other threads:[~2001-09-19  2:07 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-15 19:36 Access types and classwide programming chris.danx
2001-09-15 20:28 ` chris.danx
2001-09-15 23:42 ` [Different Topic] Endianess? chris.danx
2001-09-16  6:22   ` Jeffrey Carter
2001-09-17  7:37   ` Juanma Barranquero
2001-09-17  7:53     ` Assigning the value of a deferred constant? Juanma Barranquero
2001-09-17 14:04       ` Ted Dennison
2001-09-17 14:36         ` Juanma Barranquero
2001-09-17 17:36           ` tmoran
2001-09-18  8:16             ` Juanma Barranquero
2001-09-18 18:40         ` Richard Riehle
2001-09-19  2:07           ` Vincent Marciante [this message]
2001-09-19  7:39           ` Juanma Barranquero
2001-09-16  6:19 ` Access types and classwide programming Jeffrey Carter
2001-09-16 13:37   ` chris.danx
2001-09-16 16:49     ` Jeffrey Carter
2001-09-16 18:24       ` David C. Hoos, Sr.
2001-09-17  6:15         ` Jeffrey Carter
2001-09-17  4:57     ` tmoran
2001-09-17 14:16       ` Ted Dennison
2001-09-16  9:32 ` tmoran
2001-09-17  9:41 ` John McCabe
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