Re: C pointer semantics with dynamically allocated struct

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: C pointer semantics with dynamically allocated struct
Date	2015-10-03 02:01 +0100
Organization	A noiseless patient Spider
Message-ID	<87k2r4pxxz.fsf@bsb.me.uk> (permalink)
References	(16 earlier) <376c05c3-ee5a-4cc9-b910-6a9d753aa4f1@googlegroups.com> <877fn5qas8.fsf@bsb.me.uk> <9b5075ac-ac18-44d4-888b-89e8f022aa27@googlegroups.com> <87vbaoq4bo.fsf@bsb.me.uk> <9a154551-4b77-44d1-9c39-1951be7e3d22@googlegroups.com>

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supercat@casperkitty.com writes:

> On Friday, October 2, 2015 at 5:43:49 PM UTC-5, Ben Bacarisse wrote:
>> Ah.  Another example.  OK, but it does not shed any light on what
>> murkiness you saw in your last example.  I'd like to clear that up first
>> (since it seemed to confirm a common misconception) but if you can't say
>> more about what was murky about it then let's leave it.  Do you at least
>> agree that accessing a union member other than the one last stored is
>> unspecified behaviour rather than undefined behaviour per se?
>
> What I have maintained is all along is that when all access are made
> using lvalues that are *directly accessed* as part of the union type,
> the C Standard does not say anything about the behavior *beyond* what
> implementations document about the representations of the data types
> involve, but does require that behavior be consistent with the documented
> representations.
>
> What was murky in the original example is whether a write to a float* by
> scanf is required to be recognized as aliasing the float stored within
> the union and, in turn, aliasing the other parts of that same union.  If
> a write directly to "u.f" is required to be recognized as aliasing "u.l"
> but it's less clear whether taking the address of "u.f" would compel a
> compiler to recognize a write to that pointer as a write to "u" or any
> of its members.

Ah right.  I find that much clearer, thank you.  Here's the code again
(with the printf format tweaked):

|     union U { float f; long l; } u;
|     u.l = 1234;
|     scanf("%f", &u.f);
|     printf("%ld", u.l);

We both seem to agree that the following version is fine:

     u.f = 1.234f;
     printf("%ld", u.l);

and that you will get some peculiar integer value derived from the
representation of 1.234f.  What about this:

     *&u.f = 1.234f;
     printf("%ld", u.l);

and, finally, this:

     void set(float *fp) { *fp = 1.234f; }
     ...
     set(&u.f);
     printf("%ld", u.l);
  
?  Do any of these have the murkiness you see with the scanf one, and if
so, where does the trouble lie?  Specifically, how does it relate to C's
effective type rules?  I find the rules rather odd[1], but they don't
explicitly distinguish between any of these cases as far as I can see.

[1] There's a defect report that captures what bothers me about them,
but it seems not to have been given a number much less decided:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1409.htm

-- 
Ben.

Thread

Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-09-29 09:49 -0700
  Re: C pointer semantics with dynamically allocated struct wssimms@gmail.com - 2015-09-30 21:18 -0700
    Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-01 09:35 -0700
      Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-01 09:41 -0700
        Re: C pointer semantics with dynamically allocated struct gazelle@shell.xmission.com (Kenny McCormack) - 2015-10-01 18:34 +0000
          Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-01 12:02 -0700
    Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-02 13:03 +0000
      Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-02 06:20 -0700
        Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 16:07 +0100
          Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-02 08:46 -0700
            Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 17:28 +0100
              Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-02 10:30 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 20:32 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-02 12:58 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 22:06 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-03 09:31 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-03 14:31 -0700
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-03 09:27 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-03 20:36 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-03 13:00 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-03 23:37 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-03 17:07 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-03 17:42 -0700
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-03 17:49 -0700
                Re: C pointer semantics with dynamically allocated struct Richard Damon <Richard@Damon-Family.org> - 2015-10-03 23:28 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-04 00:10 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-04 13:24 +0100
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-04 14:07 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-04 14:40 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-04 18:04 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-04 20:10 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-04 22:15 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-05 08:53 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-06 08:45 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-06 12:34 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-06 17:16 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-06 21:47 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-07 11:05 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-07 11:47 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-07 13:50 -0700
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-07 18:10 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-07 16:10 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-07 16:33 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 09:08 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 10:43 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 11:50 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 12:19 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-07 15:32 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-07 16:21 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 08:54 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 11:15 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 12:38 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 13:30 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 14:15 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 14:53 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-08 15:23 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-08 17:24 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-09 08:02 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-09 09:02 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-09 12:43 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-09 14:21 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-09 15:14 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-13 18:37 -0700
                Re: C pointer semantics with dynamically allocated struct Martin Shobe <martin.shobe@yahoo.com> - 2015-10-07 20:56 -0500
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-07 19:41 -0700
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-07 23:15 -0400
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-14 10:05 +0000
                Re: C pointer semantics with dynamically allocated struct Richard Heathfield <rjh@cpax.org.uk> - 2015-10-14 11:23 +0100
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-14 08:24 -0700
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-16 11:12 +0000
                Re: C pointer semantics with dynamically allocated struct Gareth Owen <gwowen@gmail.com> - 2015-10-16 21:55 +0100
                Re: C pointer semantics with dynamically allocated struct Les Cargill <lcargill99@comcast.com> - 2015-10-16 22:08 -0500
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-14 11:44 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-14 11:12 -0700
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-07 10:34 +0000
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-07 07:23 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-07 09:53 -0700
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-14 10:13 +0000
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-14 11:36 -0400
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-04 13:35 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-04 06:23 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-04 15:34 +0100
                Re: C pointer semantics with dynamically allocated struct "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-04 08:07 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-04 14:42 +0000
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-04 15:37 +0000
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-05 00:33 +0100
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-14 10:20 +0000
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-14 13:55 +0100
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-04 22:06 -0700
                Re: C pointer semantics with dynamically allocated struct raltbos@xs4all.nl (Richard Bos) - 2015-10-14 10:30 +0000
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-14 08:39 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-14 23:47 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-15 10:20 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-15 11:10 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-15 12:11 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-15 12:35 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-15 13:52 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-15 14:35 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-15 15:51 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 06:48 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-16 08:50 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 10:06 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-16 12:45 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 13:56 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-16 14:29 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 14:52 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-16 15:32 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 15:59 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-17 00:03 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-17 00:08 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 15:26 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-17 16:38 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-16 23:43 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-16 23:57 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 14:50 -0700
                Re: C pointer semantics with dynamically allocated struct Ian Collins <ian-news@hotmail.com> - 2015-10-18 10:55 +1300
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-17 18:24 -0400
                Re: C pointer semantics with dynamically allocated struct Richard Damon <Richard@Damon-Family.org> - 2015-10-17 18:39 -0400
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-17 18:56 -0400
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 16:17 -0700
                Re: C pointer semantics with dynamically allocated struct James Kuyper <jameskuyper@verizon.net> - 2015-10-18 11:46 -0400
                Re: C pointer semantics with dynamically allocated struct Richard Damon <Richard@Damon-Family.org> - 2015-10-17 19:44 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-17 16:48 -0700
                Re: C pointer semantics with dynamically allocated struct Richard Heathfield <rjh@cpax.org.uk> - 2015-10-18 01:14 +0100
                Re: C pointer semantics with dynamically allocated struct Richard Damon <Richard@Damon-Family.org> - 2015-10-17 20:22 -0400
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-17 17:26 -0700
                Re: C pointer semantics with dynamically allocated struct Richard Heathfield <rjh@cpax.org.uk> - 2015-10-18 01:44 +0100
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 20:09 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-18 11:24 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-19 04:42 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-19 16:24 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-20 02:20 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-19 19:53 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-20 09:41 +0000
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 19:53 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 16:07 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-17 14:55 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-18 04:28 +0000
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-15 12:49 -0700
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-15 12:26 -0700
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-15 12:48 -0700
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-17 08:21 -0700
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-04 22:23 -0700
          Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-02 09:10 -0700
            Re: C pointer semantics with dynamically allocated struct Martin Shobe <martin.shobe@yahoo.com> - 2015-10-02 11:58 -0500
              Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-02 11:38 -0700
                Re: C pointer semantics with dynamically allocated struct Martin Shobe <martin.shobe@yahoo.com> - 2015-10-05 09:36 -0500
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-12 09:47 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-13 02:51 +0000
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-12 23:45 -0700
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-15 13:54 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-16 01:07 +0000
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-19 15:33 -0700
            Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 19:21 +0100
              Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-02 12:10 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 21:24 +0100
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-02 14:32 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 23:43 +0100
                Re: C pointer semantics with dynamically allocated struct supercat@casperkitty.com - 2015-10-02 16:49 -0700
                Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-03 02:01 +0100
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-03 00:38 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-02 16:10 -0700
                Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-04 21:54 -0700
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-05 08:19 -0700
          Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-02 15:16 -0700
            Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-02 22:52 +0000
              Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-03 00:48 -0700
                Re: C pointer semantics with dynamically allocated struct glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-03 08:22 +0000
                Re: C pointer semantics with dynamically allocated struct Keith Thompson <kst-u@mib.org> - 2015-10-03 12:05 -0700
              Re: C pointer semantics with dynamically allocated struct Richard Damon <Richard@Damon-Family.org> - 2015-10-03 16:38 -0400
            Re: C pointer semantics with dynamically allocated struct Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-03 00:00 +0100
              Re: C pointer semantics with dynamically allocated struct Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-04 22:16 -0700

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