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Groups > comp.lang.c++ > #89650
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: "C++ on the Move" by Darryl K. Taft |
| Date | 2023-03-10 11:33 -0800 |
| Organization | None to speak of |
| Message-ID | <87o7p0pfjy.fsf@nosuchdomain.example.com> (permalink) |
| References | (6 earlier) <871qlxr8e7.fsf@nosuchdomain.example.com> <f23d2cd0-5009-49bf-a279-659837065635n@googlegroups.com> <tuetma$1tglu$1@dont-email.me> <c0f7eee9-0a30-47d4-a303-ac974ecd8514n@googlegroups.com> <tufgbi$20omv$2@dont-email.me> |
David Brown <david.brown@hesbynett.no> writes:
[...]
> It would be a terrible idea for an efficient language to try to define
> what happens here, forcing compilers to generate pointless extra
> run-time checks just because some people have bugs in their code.
[...]
> It makes no sense for a language to try to define behaviour on
> division by zero - it is far better for the language to say "don't do
> that". Why someone would then want the language to say what will
> happen when you do something contrary to the rules of the language, is
> beyond my understanding.
[...]
Let me offer Ada as a counterexample (and I'm not suggesting that
C++ should follow Ada's example).
Signed numeric overflow and division by zero, along with a
number of other conditions like out of bounds array access and
dereferencing a null pointer, are defined in Ada to raise the
predefined Constraint_Error exception. If I write code that divides
by zero and then handles the exception, the behavior is well defined.
If I don't handle the exception, the program (or task, similar to
a thread) is aborted. The result of a division is either a well
defined numeric result or a well defined exception.
Since exceptions and the conditions that raise them are defined in
the language, optimizing compilers can omit a lot of checks if they
can prove that they'll never be triggered.
There are also language mechanisms to suppress checks. If a
check would have been triggered but is suppressed, the behavior
is undefined.
There is certainly a non-zero cost to this -- a cost that you can
avoid by suppressing checks -- but the cost is not all that great,
certainly less than the cost of using an interpreted language rather
than a compiled language.
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for XCOM Labs
void Void(void) { Void(); } /* The recursive call of the void */
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"C++ on the Move" by Darryl K. Taft Lynn McGuire <lynnmcguire5@gmail.com> - 2023-03-07 15:38 -0600
Re: "C++ on the Move" by Darryl K. Taft legalize+jeeves@mail.xmission.com (Richard) - 2023-03-07 22:08 +0000
Re: "C++ on the Move" by Darryl K. Taft Lynn McGuire <lynnmcguire5@gmail.com> - 2023-03-07 16:25 -0600
Re: "C++ on the Move" by Darryl K. Taft legalize+jeeves@mail.xmission.com (Richard) - 2023-03-07 23:10 +0000
Re: "C++ on the Move" by Darryl K. Taft Paavo Helde <eesnimi@osa.pri.ee> - 2023-03-08 08:40 +0200
Re: "C++ on the Move" by Darryl K. Taft Lynn McGuire <lynnmcguire5@gmail.com> - 2023-04-05 19:30 -0500
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-07 23:21 -0800
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-03-08 16:10 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-08 19:47 +0100
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-08 11:21 -0800
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-03-08 19:49 +0000
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-08 12:08 -0800
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-08 09:52 -0800
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-08 10:18 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-08 20:45 +0100
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-08 19:20 +0100
Re: "C++ on the Move" by Darryl K. Taft James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-03-08 14:10 -0500
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-08 22:34 +0100
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-08 14:29 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 00:59 +0100
Re: "C++ on the Move" by Darryl K. Taft James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-03-08 18:11 -0500
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-08 12:28 -0800
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-08 12:48 -0800
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-08 22:40 +0100
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 01:12 +0100
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-08 16:27 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 13:52 +0100
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-09 12:47 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 01:08 +0100
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-09 02:08 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 14:06 +0100
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-09 07:14 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-09 20:32 +0100
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-09 12:42 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 00:30 +0100
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-03-10 15:01 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 16:38 +0100
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-03-10 16:36 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-11 10:43 +0100
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-08 12:59 -0800
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-09 03:03 -0800
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-09 12:12 -0800
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-09 19:20 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 10:36 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-10 04:27 -0800
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-10 05:13 -0800
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-10 06:05 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 15:59 +0100
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-10 15:14 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 16:45 +0100
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-10 16:02 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 11:45 +0100
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-13 12:00 +0000
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-13 12:26 +0000
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-13 15:00 +0000
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-13 15:18 +0000
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-13 16:00 +0000
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-13 18:43 +0000
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 09:26 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 13:30 +0100
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 16:16 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 17:49 +0100
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 17:14 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 23:05 +0100
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-15 08:39 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-15 17:31 +0100
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-15 17:11 +0000
Re: "C++ on the Move" by Darryl K. Taft Ben Bacarisse <ben.lists@bsb.me.uk> - 2023-03-15 00:10 +0000
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 14:52 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 20:17 +0100
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-13 19:31 +0000
Re: "C++ on the Move" by Darryl K. Taft Paavo Helde <eesnimi@osa.pri.ee> - 2023-03-14 00:01 +0200
Re: "C++ on the Move" by Darryl K. Taft gst <g.starck@gmail.com> - 2023-03-13 23:49 -0700
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-14 11:04 +0100
Re: "C++ on the Move" by Darryl K. Taft gst <g.starck@gmail.com> - 2023-03-14 03:26 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 09:08 +0100
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 01:21 -0700
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 15:12 -0700
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 09:31 +0000
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-14 09:51 +0000
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 09:56 +0000
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-14 10:30 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 13:41 +0100
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 14:50 -0700
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 14:13 -0700
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-14 21:53 +0000
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-04-04 23:21 -0700
Re: "C++ on the Move" by Darryl K. Taft "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2023-04-05 08:44 -0700
Re: "C++ on the Move" by Darryl K. Taft legalize+jeeves@mail.xmission.com (Richard) - 2023-04-05 15:47 +0000
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-04-05 16:33 +0000
Re: "C++ on the Move" by Darryl K. Taft richardthiebaud <thiebauddick2@aol.com> - 2023-04-05 12:53 -0400
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-04-05 17:19 +0000
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-04-05 13:47 -0700
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-04-06 08:12 +0000
Re: "C++ on the Move" by Darryl K. Taft Daniel <danielaparker@gmail.com> - 2023-04-06 05:23 -0700
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-04-06 08:09 +0000
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-07-20 10:02 -0700
Re: "C++ on the Move" by Darryl K. Taft Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-04-05 21:04 +0100
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-07-20 09:52 -0700
Re: "C++ on the Move" by Darryl K. Taft Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-07-20 21:01 +0100
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 08:57 -0700
Re: "C++ on the Move" by Darryl K. Taft Muttley@dastardlyhq.com - 2023-03-14 16:20 +0000
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-10 07:23 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 16:48 +0100
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 15:54 +0100
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-10 07:12 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 16:53 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-10 08:20 -0800
Re: "C++ on the Move" by Darryl K. Taft kalevi@kolttonen.fi (Kalevi Kolttonen) - 2023-03-10 16:48 +0000
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-12 11:54 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-12 09:29 -0700
Re: "C++ on the Move" by Darryl K. Taft Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2023-03-12 09:57 -0700
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-12 10:26 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 14:40 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-13 08:59 -0700
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-12 14:17 -0700
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-12 16:18 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 14:30 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-13 08:25 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 17:54 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-14 13:27 -0700
Re: "C++ on the Move" by Darryl K. Taft Paavo Helde <eesnimi@osa.pri.ee> - 2023-03-13 20:37 +0200
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-14 13:30 -0700
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-13 10:02 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-13 20:21 +0100
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-13 12:53 -0700
Re: "C++ on the Move" by Darryl K. Taft Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-03-14 01:17 -0700
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-14 09:55 +0100
Re: "C++ on the Move" by Darryl K. Taft scott@slp53.sl.home (Scott Lurndal) - 2023-03-10 16:27 +0000
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-10 11:33 -0800
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-10 11:14 -0800
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-11 04:10 -0800
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-12 12:06 +0100
Re: "C++ on the Move" by Darryl K. Taft Öö Tiib <ootiib@hot.ee> - 2023-03-12 09:29 -0700
Re: "C++ on the Move" by Darryl K. Taft Bonita Montero <Bonita.Montero@gmail.com> - 2023-03-09 15:26 +0100
Re: "C++ on the Move" by Darryl K. Taft Lynn McGuire <lynnmcguire5@gmail.com> - 2023-03-09 16:59 -0600
Re: "C++ on the Move" by Darryl K. Taft Bonita Montero <Bonita.Montero@gmail.com> - 2023-03-10 05:59 +0100
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-10 09:17 +0100
Re: "C++ on the Move" by Darryl K. Taft Bonita Montero <Bonita.Montero@gmail.com> - 2023-03-10 13:38 +0100
Re: "C++ on the Move" by Darryl K. Taft Michael S <already5chosen@yahoo.com> - 2023-03-10 05:10 -0800
Re: "C++ on the Move" by Darryl K. Taft Bonita Montero <Bonita.Montero@gmail.com> - 2023-03-10 15:20 +0100
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 16:13 +0100
Re: "C++ on the Move" by Darryl K. Taft David Brown <david.brown@hesbynett.no> - 2023-03-10 10:44 +0100
Re: "C++ on the Move" by Darryl K. Taft Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-03-10 11:08 -0800
Re: "C++ on the Move" by Darryl K. Taft "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-03-12 11:42 +0100
Re: "C++ on the Move" by Darryl K. Taft "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-04-06 00:42 -0700
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