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Groups > comp.lang.c > #149979

Re: Offsetof with array elements

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: Offsetof with array elements
Date 2020-02-12 17:50 +0000
Organization A noiseless patient Spider
Message-ID <87h7zvhf00.fsf@bsb.me.uk> (permalink)
References <r1udrq$hoe$1@dont-email.me> <r1v150$nb7$1@news.albasani.net> <87mu9ogkcq.fsf@bsb.me.uk> <r20tcv$b9b$3@news.albasani.net>

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Bonita Montero <Bonita.Montero@gmail.com> writes:

>> The ## is wrong. ...
>
> Maybe useless, but not necessarily wrong.
> Compiled as C++ with MSVC++ everything is o.k..

This is comp.lang.c but C++ happens to agree here -- in both C and C++
any use of your macro produced undefined behaviour.  That can include
accepting the code by not doing what ## usually means.  That's somewhat
worse than "useless".

-- 
Ben.

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Thread

Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-11 15:31 +0100
  Re: Offsetof with array elements Guillaume <message@bottle.org> - 2020-02-11 16:08 +0100
    Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-11 08:32 -0800
      Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-11 18:46 +0100
        Re: Offsetof with array elements Manfred <noname@add.invalid> - 2020-02-11 19:24 +0100
          Re: Offsetof with array elements Manfred <noname@add.invalid> - 2020-02-11 19:36 +0100
          Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-11 22:50 -0500
            Re: Offsetof with array elements Manfred <noname@add.invalid> - 2020-02-12 13:53 +0100
            Re: Offsetof with array elements Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-18 01:43 -0800
    Re: Offsetof with array elements Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-18 01:39 -0800
  Re: Offsetof with array elements Bart <bc@freeuk.com> - 2020-02-11 16:56 +0000
    Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-11 18:49 +0100
  Re: Offsetof with array elements Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-11 21:00 +0100
    Re: Offsetof with array elements Bart <bc@freeuk.com> - 2020-02-11 20:13 +0000
      Re: Offsetof with array elements Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-11 21:24 +0100
        Re: Offsetof with array elements Bart <bc@freeuk.com> - 2020-02-11 20:33 +0000
          Re: Offsetof with array elements Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-11 21:39 +0100
            Re: Offsetof with array elements Bart <bc@freeuk.com> - 2020-02-11 20:48 +0000
    Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-12 10:56 +0100
      Re: Offsetof with array elements Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-12 14:07 +0100
        Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-12 15:24 +0100
    Re: Offsetof with array elements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-12 10:39 +0000
      Re: Offsetof with array elements Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-12 14:08 +0100
        Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-12 05:29 -0800
          Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-12 11:45 -0800
        Re: Offsetof with array elements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-12 17:50 +0000
      Re: Offsetof with array elements Tim Rentsch <tr.17687@z991.linuxsc.com> - 2020-02-16 02:41 -0800
        Re: Offsetof with array elements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2020-02-16 11:18 +0000
    Re: Offsetof with array elements already5chosen@yahoo.com - 2020-02-13 02:42 -0800
      Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-14 00:20 -0500
        Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-14 08:24 +0100
          Re: Offsetof with array elements already5chosen@yahoo.com - 2020-02-14 03:59 -0800
            Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-14 15:25 +0100
              Re: Offsetof with array elements already5chosen@yahoo.com - 2020-02-16 03:15 -0800
                Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-16 14:09 +0100
                Re: Offsetof with array elements already5chosen@yahoo.com - 2020-02-16 06:36 -0800
          Re: Offsetof with array elements James Kuyper <jameskuyper@alumni.caltech.edu> - 2020-02-15 08:18 -0500
            Re: Offsetof with array elements David Brown <david.brown@hesbynett.no> - 2020-02-15 15:49 +0100
  Re: Offsetof with array elements fir <profesor.fir@gmail.com> - 2020-02-12 04:40 -0800
  Re: Offsetof with array elements "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2020-02-16 16:03 -0800

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