From: Marin David Condic <condicma@bogon.pwfl.com>
Subject: Re: Function Calls by Address
Date: 1999/09/03
Date: 1999-09-03T00:00:00+00:00 [thread overview]
Message-ID: <37D03AA4.D26CF868@pwfl.com> (raw)
In-Reply-To: 37CFFEA6.921CBE59@magic.fr
Francois Godme wrote:
> I knew about the nested procedures restriction but thought that no one
> still uses nested procedures. Personally, I have stopped using them. Why
> will I hide a perfectly useful procedure inside another when all I want
> is to spare me rewriting over and over the same thing. Are nested
> procedures coming from the Pascal heritage where everything was residing
> inside the main program? By the same matter, who is still using the
> 'separate' construct for writing new applications?
I think that the use of child units contributes a lot to better overall
code. If nothing else, it helps with configuration management and change
control issues by better isolating where changes occur.
I never liked the "is separate" and I'm not sure I could tell you why. I
wasn't fond of inheriting such a large context which was not immediately
visible in the code I was editing. I didn't like the fact that recompiling
the parent package would cause recompilation of all the separate units
because you effectively hit their specs.
That being said, there are still lots of handy reasons for using nested
procedures. Sometimes you have a small chunk of code which is repeated
frequently, but has no logical cohesion or identifiable function. The nested
procedure shortens up the code without creating an essentially purposeless
separate unit. Often the nesting of statements can be simplified by breaking
up the code into nested procedures. I agree that if a unit is getting into
thousands of lines of code due to nesting procedures, it is likely to be a
bad thing, but you don't want to throw out a very handy language feature
just because excessive use can happen.
MDC
--
Marin David Condic
Real Time & Embedded Systems, Propulsion Systems Analysis
United Technologies, Pratt & Whitney, Large Military Engines
M/S 731-95, P.O.B. 109600, West Palm Beach, FL, 33410-9600
***To reply, remove "bogon" from the domain name.***
Visit my web page at: http://www.mcondic.com/
next prev parent reply other threads:[~1999-09-03 0:00 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-08-30 0:00 Function Calls by Address Craig Jameson
1999-08-30 0:00 ` Robert Dewar
1999-08-30 0:00 ` Robert Dewar
1999-08-31 0:00 ` Martin Gangkofer
1999-08-30 0:00 ` Marin David Condic
1999-08-30 0:00 ` Robert Dewar
1999-08-30 0:00 ` Marin David Condic
1999-08-30 0:00 ` Larry Kilgallen
1999-08-31 0:00 ` David Kristola
1999-08-31 0:00 ` Matthew Heaney
1999-09-01 0:00 ` Simon Wright
1999-09-02 0:00 ` Francois Godme
1999-09-03 0:00 ` Robert Dewar
1999-09-03 0:00 ` Francois Godme
1999-09-03 0:00 ` David C. Hoos, Sr.
1999-09-04 0:00 ` Robert Dewar
1999-09-05 0:00 ` Francois Godme
1999-09-06 0:00 ` Robert Dewar
1999-09-06 0:00 ` Francois Godme
1999-09-06 0:00 ` Robert Dewar
1999-09-06 0:00 ` Bob Collins
1999-09-07 0:00 ` Pascal Obry
1999-09-06 0:00 ` Robert Dewar
1999-09-07 0:00 ` Pascal Obry
1999-09-07 0:00 ` Francois Godme
1999-09-08 0:00 ` Francois Godme
1999-09-03 0:00 ` Marin David Condic [this message]
1999-09-14 0:00 ` Robert I. Eachus
[not found] ` <wcc3dwgb7ii.fsf@world.std.com>
[not found] ` <37E81079.CC2566D9@mitre.org>
1999-09-22 0:00 ` Robert A Duff
1999-09-22 0:00 ` Robert I. Eachus
1999-09-23 0:00 ` Robert Dewar
1999-09-23 0:00 ` Robert A Duff
1999-09-03 0:00 ` Robert Dewar
1999-09-03 0:00 ` Ted Dennison
1999-09-04 0:00 ` Jean-Pierre Rosen
1999-09-05 0:00 ` Matthew Heaney
1999-09-05 0:00 ` Ehud Lamm
1999-09-04 0:00 ` Brian Rogoff
1999-09-05 0:00 ` Robert Dewar
1999-09-05 0:00 ` Robert Dewar
1999-09-05 0:00 ` Robert Dewar
1999-09-03 0:00 ` Simon Wright
1999-09-04 0:00 ` Mario Klebsch
1999-09-05 0:00 ` Robert Dewar
1999-09-06 0:00 ` Francois Godme
1999-09-05 0:00 ` Brian Rogoff
1999-09-06 0:00 ` Robert Dewar
1999-09-08 0:00 ` Georg Bauhaus
1999-09-05 0:00 ` Geoff Bull
1999-09-07 0:00 ` Michael F. Yoder
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