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| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Objective C |
| Date | 2015-11-21 03:31 -0800 |
| Organization | None to speak of |
| Message-ID | <ln7flb8u7t.fsf@kst-u.example.com> (permalink) |
| References | (7 earlier) <n2fhmo$vpi$1@dont-email.me> <0g2o4bpcd5ofn5a1rab2vftn0sivi8ssk9@4ax.com> <kfnpoz48hpl.fsf@x-alumni2.alumni.caltech.edu> <8nj05bha7qo58upepjqipdds0fgjkl8umb@4ax.com> <m4k05bdossoe7criehdedlhgfpv1lml9rp@4ax.com> |
Robert Wessel <robertwessel2@yahoo.com> writes:
[...]
> And, of course, writing to one union member and reading from the other
> is undefined.
Incorrect.
N1570 6.5.2.3p3, footnote:
If the member used to read the contents of a union object is
not the same as the member last used to store a value in the
object, the appropriate part of the object representation of
the value is reinterpreted as an object representation in the
new type as described in 6.2.6 (a process sometimes called
"type punning"). This might be a trap representation.
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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Objective C Alla _ <modelling.data@gmail.com> - 2015-11-10 09:10 -0800
Re: Objective C "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-10 09:16 -0800
Re: Objective C Richard Heathfield <rjh@cpax.org.uk> - 2015-11-10 17:17 +0000
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-10 09:32 -0800
Re: Objective C Mark Storkamp <mstorkamp@yahoo.com> - 2015-11-10 11:38 -0600
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-10 12:36 -0500
Re: Objective C Alla _ <modelling.data@gmail.com> - 2015-11-10 11:15 -0800
Re: Objective C Richard Heathfield <rjh@cpax.org.uk> - 2015-11-10 21:51 +0000
Re: Objective C Alla _ <modelling.data@gmail.com> - 2015-11-10 23:13 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-13 16:01 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-14 01:07 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-14 06:26 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-14 22:22 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-14 15:46 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-15 01:47 +0000
Re: Objective C BartC <bc@freeuk.com> - 2015-11-15 10:43 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-15 13:19 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-14 15:43 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-15 23:50 +0100
Re: Objective C gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-16 00:05 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-15 19:10 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-16 09:11 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-16 11:57 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-16 20:38 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-16 13:20 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-16 22:28 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-16 15:33 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-16 15:56 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-17 01:43 +0000
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-17 01:21 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-16 18:11 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-16 20:12 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-19 00:59 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-18 22:46 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-19 14:25 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-19 07:58 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-19 22:13 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-19 15:29 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-27 08:44 -0800
Re: Objective C glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-17 01:26 +0000
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-16 21:48 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-16 20:27 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-17 13:58 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-17 12:28 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-18 13:00 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-18 12:31 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-18 16:43 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-18 15:57 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-19 19:09 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-19 19:05 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-20 15:00 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-20 15:30 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-22 17:11 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-22 15:53 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-23 13:51 -0600
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-24 12:00 +0000
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-17 10:26 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-17 06:20 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-17 16:41 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-17 12:08 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-17 16:27 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-17 14:55 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-18 13:59 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-18 13:06 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-24 14:24 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-24 15:11 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-26 17:02 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-27 07:26 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-18 21:56 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-22 02:17 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-22 07:16 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-26 17:11 -0600
Re: Objective C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-11-22 19:09 +0000
Re: Objective C Robert Wessel <robertwessel2@yahoo.com> - 2015-11-17 23:28 -0600
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-18 15:33 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-18 23:06 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-19 09:12 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-19 09:25 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-19 21:06 +0100
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-20 13:49 -0800
Re: Objective C Robert Wessel <robertwessel2@yahoo.com> - 2015-11-21 05:01 -0600
Re: Objective C Robert Wessel <robertwessel2@yahoo.com> - 2015-11-21 05:09 -0600
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-21 03:31 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-21 17:43 -0600
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-21 16:00 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-22 01:12 -0600
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-27 16:42 +0000
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-27 12:38 -0500
Re: Objective C supercat@casperkitty.com - 2015-11-27 11:09 -0800
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-21 19:06 -0500
Re: Objective C supercat@casperkitty.com - 2015-11-21 17:00 -0800
Re: Objective C glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-22 14:44 +0000
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-22 01:55 -0600
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-22 00:03 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-22 10:18 +0000
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-23 03:21 -0800
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-22 10:53 -0500
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-22 20:28 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-22 18:52 -0800
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-23 11:58 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-23 15:24 -0800
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-23 09:46 -0500
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-23 08:13 -0800
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-23 12:04 -0500
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-23 11:52 -0600
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-23 16:05 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-24 09:09 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-12-08 08:48 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-12-08 10:40 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-12-09 12:34 -0800
Re: Objective C supercat@casperkitty.com - 2015-12-08 10:50 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-12-09 12:42 -0800
Re: Objective C supercat@casperkitty.com - 2015-12-09 13:38 -0800
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-12-10 19:54 +0000
Re: Objective C David Thompson <dave.thompson2@verizon.net> - 2015-12-06 08:02 -0500
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-22 14:36 -0800
Re: Objective C Robert Wessel <robertwessel2@yahoo.com> - 2015-11-23 00:41 -0600
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-23 07:39 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-22 14:23 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-17 10:24 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-18 15:40 +0100
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-20 16:02 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-21 15:53 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-21 08:58 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-22 22:14 +0100
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-23 03:39 -0800
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-23 13:24 +0000
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-26 09:39 -0800
Re: Objective C Robert Wessel <robertwessel2@yahoo.com> - 2015-11-26 13:16 -0600
Re: Objective C supercat@casperkitty.com - 2015-11-26 12:25 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-27 14:34 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-26 12:39 -0800
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-27 16:43 +0000
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-27 09:29 -0800
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-27 14:18 -0800
Re: Objective C glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-23 22:35 +0000
Re: Objective C James Kuyper <jameskuyper@verizon.net> - 2015-11-23 17:40 -0500
Re: Objective C glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-24 05:35 +0000
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-25 12:15 -0800
Re: Objective C glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-25 22:49 +0000
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-27 16:44 +0000
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-27 14:03 -0800
Re: Objective C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-11-29 09:29 +0000
Re: Objective C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-11-22 19:01 +0000
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-23 07:31 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-23 07:43 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-23 08:17 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-23 17:34 +0100
Re: Objective C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-11-23 22:02 +0000
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-24 10:12 +0100
Re: Objective C Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-27 08:39 -0800
Re: Objective C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-11-14 18:24 +0000
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-14 12:23 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-14 12:36 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-14 13:13 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-14 14:04 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-14 14:15 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-14 14:29 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-14 15:39 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-14 16:37 -0800
Re: Objective C Ian Collins <ian-news@hotmail.com> - 2015-11-15 13:46 +1300
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-15 02:06 +0000
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-15 03:25 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-15 12:56 +0000
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-15 07:53 -0600
Re: Objective C Stephen Sprunk <stephen@sprunk.org> - 2015-11-15 07:19 -0600
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-15 13:29 +0000
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-15 10:56 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-15 14:35 -0800
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-15 16:52 -0800
Re: Objective C supercat@casperkitty.com - 2015-11-15 19:49 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-16 11:02 +0000
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-16 10:36 -0800
Re: Objective C David Thompson <dave.thompson2@verizon.net> - 2015-12-06 08:03 -0500
Re: Objective C Melzzzzz <mel@zzzzz.com> - 2015-11-16 02:01 +0100
Re: Objective C supercat@casperkitty.com - 2015-11-15 19:34 -0800
Re: Objective C Chad <cdalten@gmail.com> - 2015-11-15 19:54 -0800
Re: Objective C raltbos@xs4all.nl (Richard Bos) - 2015-11-17 22:36 +0000
Re: Objective C supercat@casperkitty.com - 2015-11-17 15:27 -0800
Re: Objective C Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-17 21:15 -0800
Re: Objective C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-14 22:08 +0000
Re: Objective C fir <profesor.fir@gmail.com> - 2015-11-27 14:36 -0800
Re: Objective C David Brown <david.brown@hesbynett.no> - 2015-11-10 19:03 +0100
Re: Objective C Keith Thompson <kst-u@mib.org> - 2015-11-10 10:50 -0800
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