From: watzka@stat.uni-muenchen.de (Kurt Watzka)
Subject: Re: Which language pays most? Smalltalk, not C++ nor Java.
Date: 1997/12/28
Date: 1997-12-28T00:00:00+00:00 [thread overview]
Message-ID: <685mee$5d4$1@sparcserver.lrz-muenchen.de> (raw)
In-Reply-To: 34A50CAA.54AA@netup.cl
Guillermo Schwarz <gschwarz@netup.cl> writes:
>Kaz Kylheku wrote:
>> Although 'memcpy' is not a reserved keyword by any means,
>> it is a reserved 'external name'.
>It is the first time I see reserved external.
Well, looks as if there still is something to learn about C for you.
The exact wording is "are reserved as identifiers with external
linkage", but "reserved external name" looks close enough to me.
>> A strictly conforming program may not define any external
>> name that begins with 'mem' followed by any combination of letters,
>> digits or underscores.
>Ok. Define void memfoo() { } and see if it compiles.
>It does.
The behaviour of a program that declares or defines an identifier with
the same name as an identifier reserved in that context is undefined.
Undefined behaviour means: "No diagnostic required, and whatever the
implementor chooses to do is correct behaviour as far as the definition
of the C programming language is concerned".
>> Define memcpy, if you write such a static function, you must not
>> include the <string.h> header in
>> the same translation unit, else undefined behavior results.
>Wrong. The compiler points out two different implementations.
>The executable can't be generated.
If memcpy is not defined as a function with external linkage, and
if <string.h> is not included, an implementation that does not
sucessfully translate the program in question is at error. Did
you actually _try_ it, and if yes, which implementation did
"point out two different implementations"?
--------8<--------8<--------8<--------8<--------8<--------8<--------
#include <stdio.h>
static void *memcpy(void *to, const void *from, size_t n)
{
char *cto = to;
const char *cfrom = from;
while (n--)
*cto++ = *cfrom++;
}
struct foo
{
int fred;
char wilma[32];
double barney;
};
int main(void)
{
struct foo bar = { 0 }, baz = { 42, "Hello", 3.14159 };
memcpy(&bar, &baz, sizeof baz);
printf("%d, %s, %f\n", bar.fred, bar.wilma, bar.barney);
return 0;
}
--------8<--------8<--------8<--------8<--------8<--------8<--------
is a valid C program, because the header associated with the file scope
identifier memcpy() is not included, and because memcpy() is not defined
as a symbol with external linkage.
>> There is no such thing as ``overriding'' in C. Each external name must
>> have exactly one definition if it is used anywhere in the program.
>That's true. C is not object oriented. C++ is just an Smalltalk
>wannabe.
The object model and design ideas behind C++ are completely different
from Smalltalk. You could probably call C++ a Simula wannabe (If you
are prepared to call a Mustang a Modell T wannabe), but calling
it a Smalltalk wannabe indicates that you either don't know Smalltalk
or you don't know C++.
Kurt
--
| Kurt Watzka Phone : +49-89-2178-2781
| watzka@stat.uni-muenchen.de
next prev parent reply other threads:[~1997-12-28 0:00 UTC|newest]
Thread overview: 245+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <199712121931.LAA25389@sirius.infonex.com>
1997-12-12 0:00 ` Which language pays most 17457 -- C++ vs. Java? Roedy Green
1997-12-17 0:00 ` Wes Groleau
1997-12-16 0:00 ` steve
1997-12-18 0:00 ` Alicia Carla Longstreet
1997-12-17 0:00 ` steve
1997-12-19 0:00 ` Larry Elmore
1997-12-19 0:00 ` James Giles
[not found] ` <01bd0c0b$53cc1860$26db45cf@juddesk>
1997-12-17 0:00 ` steve
1997-12-18 0:00 ` Peter Seebach
1997-12-17 0:00 ` steve
1997-12-19 0:00 ` Kaz Kylheku
1997-12-17 0:00 ` steve
1997-12-22 0:00 ` Lawrence Kirby
1997-12-21 0:00 ` steve
1997-12-28 0:00 ` Lawrence Kirby
1997-12-18 0:00 ` James Giles
1997-12-17 0:00 ` steve
1997-12-19 0:00 ` James Giles
1997-12-18 0:00 ` steve
1997-12-19 0:00 ` James Giles
1997-12-18 0:00 ` steve
1997-12-19 0:00 ` James Giles
1997-12-22 0:00 ` Lawrence Kirby
1997-12-21 0:00 ` James Giles
1997-12-21 0:00 ` steve
1997-12-30 0:00 ` Chris Gray
1997-12-28 0:00 ` Lawrence Kirby
1997-12-28 0:00 ` John Winters
1997-12-30 0:00 ` paulr
1997-12-31 0:00 ` Which language pays most " arnie sherman
1997-12-30 0:00 ` Dann Corbit
1997-12-31 0:00 ` John Slaman
[not found] ` <01bd198f$4050d960$68c8b5cc@dhite.unicomp.net>
1998-01-06 0:00 ` Jedi
1998-01-10 0:00 ` Highlander Consulting
1998-01-11 0:00 ` Patricia Shanahan
1998-01-11 0:00 ` Barrabazz
1998-01-11 0:00 ` Patricia Shanahan
1998-01-12 0:00 ` Ron Peterson
1998-01-14 0:00 ` anonymous
1998-01-19 0:00 ` Joe Gwinn
[not found] ` <01bd2526$66b70fa0$d6d945cf@juddesk>
1998-01-23 0:00 ` dnns
1998-01-23 0:00 ` Philosophers Nick Roberts
1998-01-23 0:00 ` Spam--> was:Re: Philosophers Dann Corbit
1998-01-24 0:00 ` Nick Roberts
1998-01-26 0:00 ` Doug Miller
1998-01-24 0:00 ` Philosophers Mike Whiten
1998-01-24 0:00 ` Philosophers The Goobers
1998-01-25 0:00 ` Philosophers Arnold Trembley
1998-01-25 0:00 ` Philosophers The Goobers
1998-01-26 0:00 ` :-) Philosophers Giovanni Drogo [drogo@rn.bastiani.it]
1998-01-29 0:00 ` Philosophers Steve Dekorte
1998-01-29 0:00 ` Philosophers The Goobers
1998-01-24 0:00 ` Philosophers John G.
[not found] ` <Pine.LNX.3.95. <34cd2808.10685219@newsroom.tassie.net.au>
1998-01-28 0:00 ` Philosophers docdwarf
[not found] ` <01bd2c40$b62837a0$7261b693@HP5079Q>
1998-01-28 0:00 ` Philosophers The Goobers
1998-02-01 0:00 ` Philosophers Scott Adams
[not found] ` <01bd2cc0$f0042b70$7261b693@HP5079Q>
1998-02-04 0:00 ` Philosophers The Goobers
1998-02-10 0:00 ` Back to the topic of CS students. (was Re: Philosophers) cyanide
1998-02-10 0:00 ` Nick Roberts
1998-01-30 0:00 ` Philosophers jim
1998-01-30 0:00 ` Philosophers docdwarf
1998-01-30 0:00 ` Philosophers suzie
1998-01-30 0:00 ` Philosophers docdwarf
1998-01-31 0:00 ` Philosophers Martin Richardson
1998-01-31 0:00 ` Philosophers Jeff York
1998-02-01 0:00 ` Philosophers Martin Richardson
1998-02-02 0:00 ` Philosophers Pat O'Connell
1998-02-02 0:00 ` Philosophers Jeff York
1998-02-02 0:00 ` Philosophers Eddie Armstrong
1998-02-03 0:00 ` Philosophers Nyk Tarr
1998-02-02 0:00 ` Philosophers Robert Garskof
1998-02-02 0:00 ` Philosophers Dave Tholen
1998-01-30 0:00 ` Philosophers Samuel Mize
1998-02-10 0:00 ` Philosophers cyanide
1998-02-09 0:00 ` Philosophers The Goobers
1998-02-18 0:00 ` Philosophers Mad Hamish
1999-07-29 0:00 ` Philosophers firewind
1998-01-24 0:00 ` Philosophers John G.
1998-02-10 0:00 ` Drifting further off topic cyanide
1998-01-25 0:00 ` Philosophers Jens Schweikhardt
1998-01-28 0:00 ` Philosophers Mad Hamish
1998-01-27 0:00 ` Philosophers Kurt Wall
1998-01-27 0:00 ` Which language pays most -- C++ vs. Java? Robert Garskof
1998-01-28 0:00 ` Steve Dekorte
1998-01-28 0:00 ` Barrabazz
1998-01-28 0:00 ` dogmat
1998-01-29 0:00 ` Tim Oxler
1998-01-29 0:00 ` Tim Oxler
1998-01-29 0:00 ` Joe Gwinn
1998-01-29 0:00 ` coryb
1998-01-29 0:00 ` Wayne L. Beavers
1998-01-29 0:00 ` Frank A. Adrian
1998-02-03 0:00 ` GLE
1998-02-03 0:00 ` The Goobers
1998-02-03 0:00 ` Harold Stevens ** PLEASE SEE SIG **
1998-01-30 0:00 ` Robert S. White
1998-01-30 0:00 ` Patricia Shanahan
1998-01-31 0:00 ` Paul Van Bellinghen
1998-02-01 0:00 ` Nick Roberts
1998-02-09 0:00 ` cyanide
1998-02-10 0:00 ` Bill Lynch
1998-02-10 0:00 ` Jeff Knaggs
1998-02-10 0:00 ` Michael Rot13 Klein
1998-02-10 0:00 ` dogmat
1998-02-09 0:00 ` cyanide
1998-02-10 0:00 ` dogmat
1999-07-29 0:00 ` Edwin Purvee
[not found] ` <01bd2c3c$6726d520$8101b8c7@MIS-RKW95.spartan.com>
1998-02-10 0:00 ` Steve Dekorte
1998-02-10 0:00 ` Bill Lynch
1998-02-11 0:00 ` dogmat
1998-01-29 0:00 ` Joe Gwinn
1998-01-31 0:00 ` Larry Wiggins
1999-07-29 0:00 ` Ben Pfaff
1999-07-29 0:00 ` Kaz Kylheku
1998-02-02 0:00 ` This thread has drifted miles from its subject line Wes Groleau
[not found] ` <6alu5l$onm$1@owl.slip <01bd2c3c$6726d520$8101b8c7@MIS-RKW95.spartan.com>
1998-02-02 0:00 ` Which language pays most -- C++ vs. Java? Kaz Kylheku
1998-02-02 0:00 ` Michael C. Kasten
[not found] ` <6alu5l$ <34D6243C.2A53@gc057.fw.hac.com>
1998-02-05 0:00 ` This thread has drifted miles from its subject line Paul Osborn
[not found] ` <6alu5l$onm$1@owl.slip <34E0D798.E29D6CA0@cableol.co.uk>
1998-02-11 0:00 ` Which language pays most -- C++ vs. Java? Kaz Kylheku
[not found] ` <gwinn-1901981219520001@dh5055142. <01bd284c$4b0b4fe0$c0f682c1@xhv46.dial.pipex.com>
1998-01-24 0:00 ` Philosophers Kaz Kylheku
[not found] ` <gwinn-1901981219520001@dh5055142. <34CE059C.634DE881@snet.com>
1998-01-27 0:00 ` Which language pays most -- C++ vs. Java? Kaz Kylheku
1998-01-28 0:00 ` Robert Garskof
[not found] ` <gwinn-1901981219520001@dh5055142. <34C9F3D0.6B5A@erols.com>
1998-01-28 0:00 ` Philosophers Warren B. Focke
1998-01-29 0:00 ` Philosophers The Goobers
1998-02-05 0:00 ` Philosophers Warren B. Focke
1998-02-05 0:00 ` Philosophers The Goobers
1998-02-06 0:00 ` Philosophers dogmat
1998-02-06 0:00 ` Philosophers docdwarf
1998-02-06 0:00 ` Philosophers dogmat
1998-02-06 0:00 ` Philosophers docdwarf
1998-02-06 0:00 ` Philosophers Harold Stevens ** PLEASE SEE SIG **
1998-02-10 0:00 ` Film "Contact" Nick Roberts
1998-02-09 0:00 ` Which language pays most -- C++ vs. Java? cyanide
1998-01-11 0:00 ` Kaz Kylheku
1998-01-11 0:00 ` Carsten Arnholm
1998-01-15 0:00 ` Highlander Consulting
1998-01-16 0:00 ` Charles F Hankel
1999-08-09 0:00 ` Paul Groves
1999-08-09 0:00 ` Kaz Kylheku
1998-01-02 0:00 ` Philip Hunt
1997-12-31 0:00 ` Which language pays most 17457 " Guillermo Schwarz
1997-12-31 0:00 ` Billy Chambless
1998-01-03 0:00 ` Berna L Massingill
1998-01-04 0:00 ` Lawrence Kirby
1997-12-19 0:00 ` Peter Seebach
1997-12-19 0:00 ` James Giles
1997-12-18 0:00 ` steve
1997-12-23 0:00 ` Guillermo Schwarz
1997-12-18 0:00 ` John Seitz
1997-12-18 0:00 ` Robert Robbins
1997-12-19 0:00 ` Mark Wilden
1997-12-19 0:00 ` Ian Upright
1997-12-19 0:00 ` William Murray
1997-12-19 0:00 ` steve
1997-12-20 0:00 ` Robert Munck
1997-12-19 0:00 ` Chip Ling
1997-12-17 0:00 ` James Giles
[not found] ` <349793cb.33600861@news.wxs.nl>
[not found] ` <34923264.75B5@netup.cl>
[not found] ` <670qio$8a$1@sparcserver.lrz-muenchen.de>
[not found] ` <3494B7DA.5463@ici.net>
[not found] ` <34958D16.190C@gsg.eds.com>
[not found] ` <679807$8gm@ws1.emirates.net.ae>
[not found] ` <e9k976.8h3.ln@localhost>
1997-12-18 0:00 ` Klaus-Georg Adams
[not found] ` <67bjnv$j35$1@brie.direct.ca>
[not found] ` <349B0417.D4DB6A30@its.cl>
1997-12-20 0:00 ` Kaz Kylheku
1997-12-20 0:00 ` William J. Leary Jr.
1997-12-20 0:00 ` Kurt Watzka
1997-12-20 0:00 ` William J. Leary Jr.
1997-12-21 0:00 ` Peter Seebach
1997-12-21 0:00 ` Peter Seebach
1997-12-21 0:00 ` William J. Leary Jr.
1997-12-22 0:00 ` Peter Seebach
1997-12-22 0:00 ` Lawrence Kirby
1997-12-22 0:00 ` Kurt Watzka
1997-12-28 0:00 ` Lawrence Kirby
1997-12-22 0:00 ` Kaz Kylheku
1997-12-24 0:00 ` John Porter
1997-12-24 0:00 ` Kaz Kylheku
1997-12-27 0:00 ` Which language pays most? Smalltalk, not C++ nor Java Guillermo Schwarz
1997-12-27 0:00 ` Patricia Shanahan
1997-12-27 0:00 ` Joshua Waxman
1997-12-27 0:00 ` Robert Dewar
1997-12-29 0:00 ` John Porter
1997-12-29 0:00 ` Robert Dewar
[not found] ` <01bd14b4$dc6f6a80$6428b4cf@carla.ici.net>
1997-12-29 0:00 ` Robert Dewar
1997-12-30 0:00 ` Billy Chambless
1997-12-31 0:00 ` David Thornley
1997-12-31 0:00 ` Keith G. Murphy
1998-01-01 0:00 ` Robert Dewar
1998-01-01 0:00 ` Patricia Shanahan
1998-01-02 0:00 ` Robert Dewar
1998-01-02 0:00 ` Peter Seebach
1998-01-02 0:00 ` Robert Dewar
1998-01-02 0:00 ` firewind
1998-01-02 0:00 ` Ian Piumarta
1998-01-03 0:00 ` Richard Kenner
1998-01-02 0:00 ` Shelly Mujtaba
1998-01-02 0:00 ` Guillermo Schwarz
1998-01-03 0:00 ` Dean Roddey
1998-01-03 0:00 ` Jacqueline U. Robertson
1998-01-03 0:00 ` Dean Roddey
1998-01-05 0:00 ` Guillermo Schwarz
1998-01-05 0:00 ` Kaz Kylheku
1998-01-03 0:00 ` Jacqueline U. Robertson
1998-01-03 0:00 ` Lawrence Kirby
1997-12-29 0:00 ` Kaz Kylheku
[not found] ` <01bd147e$11496760$6a28b4cf@carla.ici.net>
1997-12-29 0:00 ` Billy Chambless
1997-12-30 0:00 ` Jeffrey Templon
1997-12-30 0:00 ` Patricia Shanahan
1997-12-30 0:00 ` Charles R Martin
1998-01-03 0:00 ` Lawrence Kirby
1997-12-29 0:00 ` Patricia Shanahan
1997-12-29 0:00 ` Lawrence Kirby
1998-01-28 0:00 ` SmallTalk Execute files Thaminda Erangane Perera
1998-01-28 0:00 ` Dann Corbit
1998-01-29 0:00 ` Griff Lewis
1997-12-28 0:00 ` Kurt Watzka [this message]
1997-12-29 0:00 ` Which language pays most? Smalltalk, not C++ nor Java Kaz Kylheku
1997-12-29 0:00 ` Guillermo Schwarz
1997-12-29 0:00 ` Kaz Kylheku
1997-12-30 0:00 ` Joshua Waxman
1997-12-30 0:00 ` Kaz Kylheku
1997-12-30 0:00 ` Joshua Waxman
1997-12-30 0:00 ` Robert Dewar
1997-12-30 0:00 ` Dann Corbit
1997-12-31 0:00 ` John Porter
1997-12-31 0:00 ` Jon S Anthony
1998-01-02 0:00 ` Robert Dewar
1997-12-31 0:00 ` David Thornley
1997-12-31 0:00 ` Robert Dewar
1997-12-30 0:00 ` firewind
1997-12-30 0:00 ` Joshua Waxman
1997-12-31 0:00 ` Robert Dewar
1997-12-31 0:00 ` Brock
1997-12-31 0:00 ` Joshua Waxman
1997-12-31 0:00 ` Dann Corbit
1998-01-01 0:00 ` firewind
1997-12-30 0:00 ` Robert Dewar
1997-12-30 0:00 ` Kaz Kylheku
1997-12-30 0:00 ` Lawrence Kirby
1997-12-30 0:00 ` Patricia Shanahan
1998-01-03 0:00 ` Lawrence Kirby
1998-01-03 0:00 ` Patricia Shanahan
1997-12-30 0:00 ` Billy Chambless
1997-12-30 0:00 ` Kaz Kylheku
1997-12-29 0:00 ` Kaz Kylheku
1998-01-02 0:00 ` Tor Iver Wilhelmsen
1997-12-25 0:00 ` Which language pays most 17457 -- C++ vs. Java? Kurt Watzka
1997-12-19 0:00 ` Quowong P Liu
1997-12-19 0:00 ` William J. Leary Jr.
1997-12-24 0:00 ` Richard D Riehle
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