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Groups > comp.lang.c > #15778

Re: struct alignment

From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c
Subject Re: struct alignment
Date 2012-01-12 20:42 +1300
Message-ID <9n7h6lFvfbU5@mid.individual.net> (permalink)
References <jekkil$u7v$1@speranza.aioe.org> <lnipkh3lpg.fsf@nuthaus.mib.org> <87hb01v279.fsf@temporary-address.org.uk>

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On 01/12/12 07:56 PM, Dr Nick wrote:
> Keith Thompson<kst-u@mib.org>  writes:
>
>> The compiler will (in fact, it *must*) insert whatever padding is
>> necessary so that all the members can be accesssed correctly.  It may or
>> may not insert more padding than it strictly needs to.
>>
>> The language standard guarantees that the first declared member is at
>> offset 0, and that all other members are at increasing offsets in the
>> order in which they're declared (the compiler can't rearrange
>> members).
>
> Does any compiler let you do this?  I have done things where the order
> of a least some elements (usually the first or the last) matters, but
> it's rare.

Let you do what?  I didn't see anything optional in Keith's reply.

-- 
Ian Collins

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Thread

struct alignment "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-01-11 13:31 -0500
  Re: struct alignment Kleuske <kleuske@nowhere.net> - 2012-01-11 19:23 +0000
  Re: struct alignment "Scott Fluhrer" <sfluhrer@ix.netcom.com> - 2012-01-11 16:58 -0500
  Re: struct alignment Ralf Damaschke <rwspam@gmx.de> - 2012-01-11 22:08 +0000
  Re: struct alignment Keith Thompson <kst-u@mib.org> - 2012-01-11 14:42 -0800
    Re: struct alignment Dr Nick <3-nospam@temporary-address.org.uk> - 2012-01-12 06:56 +0000
      Re: struct alignment Ian Collins <ian-news@hotmail.com> - 2012-01-12 20:42 +1300
        Re: struct alignment Keith Thompson <kst-u@mib.org> - 2012-01-12 02:20 -0800
          Re: struct alignment Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-18 17:03 +0000
            Re: struct alignment Kaz Kylheku <kaz@kylheku.com> - 2012-01-18 17:21 +0000
              Re: struct alignment jgk@panix.com (Joe keane) - 2012-01-19 21:42 +0000
                Re: struct alignment blp@cs.stanford.edu (Ben Pfaff) - 2012-01-19 13:57 -0800
            Re: struct alignment Stephen Sprunk <stephen@sprunk.org> - 2012-01-18 11:57 -0600
              Re: struct alignment Keith Thompson <kst-u@mib.org> - 2012-01-18 14:28 -0800
            Re: struct alignment Robert Wessel <robertwessel2@yahoo.com> - 2012-01-18 13:10 -0600
              Re: struct alignment Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-19 11:34 +0000
                Re: struct alignment Robert Wessel <robertwessel2@yahoo.com> - 2012-01-19 14:50 -0600
                Re: struct alignment Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-01-21 11:49 +0000

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