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Re: Pre-main construction order in modules

From Paavo Helde <eesnimi@osa.pri.ee>
Newsgroups comp.lang.c++
Subject Re: Pre-main construction order in modules
Date 2025-03-31 20:06 +0300
Organization A noiseless patient Spider
Message-ID <vsei21$puh7$1@dont-email.me> (permalink)
References (2 earlier) <vsbo2p$1p5ov$1@dont-email.me> <vsdkuj$3rhjh$1@dont-email.me> <vsdm3d$3srps$1@dont-email.me> <vse2ep$8iai$2@dont-email.me> <vse775$er2o$1@dont-email.me>

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On 31.03.2025 17:01, Muttley@DastardlyHQ.org wrote:
> On Mon, 31 Mar 2025 15:39:53 +0300
> Paavo Helde <eesnimi@osa.pri.ee> wibbled:
>> On 31.03.2025 12:09, Muttley@DastardlyHQ.org wrote:
>> "If [initialization] is deferred, it strongly happens before any
>> non-initialization odr-use of any non-inline function or non-inline
>> variable defined in the same translation unit as the variable to be
>> initialized."
> 
> Who writes this stuff? Its borderline gibberish.
> 
>> The keyword here is "non-initialization use". If you access your myobj
>>from main() it would be a non-initialization use, which is guaranteed to 
>> trigger the needed initialization if needed, so everything will work fine.
> 
> Not necessarily. What it the constructor of one object opened a network
> socket but that object wasn't touched again until something else in the
> program tried to loop back to that socket?

The constructor of the object is not guaranteed to run if the object nor 
anything else in its TU is not accessed from outside. It means the 
socket might not be opened.

And no, trying to access the object via a network socket does not 
qualify as "non-initialization odr-use" of the object, as far as the C++ 
standard is concerned ;-)

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Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-30 08:57 +0000
  Re: Pre-main construction order in modules Richard Damon <richard@damon-family.org> - 2025-03-30 07:21 -0400
    Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 16:22 +0000
      Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 19:56 +0200
        Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 18:00 +0000
  Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-30 10:38 -0400
    Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-30 15:30 +0000
      Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 15:59 +0000
        Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-30 16:09 +0000
          Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 16:17 +0000
            Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-30 16:23 +0000
              Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 16:26 +0000
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-31 08:20 +0000
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-31 10:46 +0200
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 11:56 +0300
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-31 11:11 +0200
                Re: Pre-main construction order in modules Richard Damon <richard@damon-family.org> - 2025-03-31 07:25 -0400
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 15:26 +0300
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-31 14:32 +0200
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 15:44 +0300
                Re: Pre-main construction order in modules Jakob Bohm <egenagwemdimtapsar@jbohm.dk> - 2025-04-01 06:06 +0200
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-04-01 08:41 +0200
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-04-01 11:41 +0300
                Re: Pre-main construction order in modules Richard Damon <richard@damon-family.org> - 2025-03-31 07:22 -0400
              Re: Pre-main construction order in modules Richard Damon <richard@damon-family.org> - 2025-03-30 15:05 -0400
            Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 19:58 +0200
              Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 18:02 +0000
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 20:05 +0200
                Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 18:07 +0000
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 20:08 +0200
                Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 18:11 +0000
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 20:17 +0200
                Re: Pre-main construction order in modules Mr Flibble <flibble@reddwarf.jmc.corp> - 2025-03-30 18:20 +0000
                Re: Pre-main construction order in modules Richard Damon <richard@damon-family.org> - 2025-03-30 15:01 -0400
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-30 22:15 +0200
                Re: Pre-main construction order in modules "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-03-30 13:57 -0700
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-31 07:37 +0200
                Re: Pre-main construction order in modules "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-03-31 21:54 -0700
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-04-01 08:41 +0200
                Re: Pre-main construction order in modules "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-04-01 00:00 -0700
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-04-01 11:42 +0200
                Re: Pre-main construction order in modules "Fred. Zwarts" <F.Zwarts@HetNet.nl> - 2025-04-01 12:00 +0200
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-04-01 14:16 +0200
                Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-04-01 16:03 +0200
      Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 11:49 +0300
        Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-31 09:09 +0000
          Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 15:39 +0300
            Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-03-31 14:01 +0000
              Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-03-31 20:06 +0300
              Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-31 19:42 -0400
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 07:26 +0000
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-04-01 11:48 +0300
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 08:57 +0000
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-04-01 12:21 +0300
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 10:08 +0000
                Re: Pre-main construction order in modules Michael S <already5chosen@yahoo.com> - 2025-04-01 13:12 +0300
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 10:23 +0000
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 10:27 +0000
                Re: Pre-main construction order in modules Michael S <already5chosen@yahoo.com> - 2025-04-01 13:20 +0300
                Re: Pre-main construction order in modules Paavo Helde <eesnimi@osa.pri.ee> - 2025-04-01 13:33 +0300
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-01 10:48 +0000
                Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 14:37 -0400
                Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 14:37 -0400
                Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 14:32 -0400
                Re: Pre-main construction order in modules "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-04-01 12:39 -0700
                Re: Pre-main construction order in modules Michael S <already5chosen@yahoo.com> - 2025-04-01 23:26 +0300
                Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 19:08 -0400
                Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 22:55 -0400
                Re: Pre-main construction order in modules Muttley@DastardlyHQ.org - 2025-04-02 07:34 +0000
        Re: Pre-main construction order in modules scott@slp53.sl.home (Scott Lurndal) - 2025-03-31 14:15 +0000
          Re: Pre-main construction order in modules Bonita Montero <Bonita.Montero@gmail.com> - 2025-03-31 16:47 +0200
      Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-31 10:29 -0400
        Re: Pre-main construction order in modules Jakob Bohm <egenagwemdimtapsar@jbohm.dk> - 2025-04-01 06:29 +0200
          Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 13:55 -0400
            Re: Pre-main construction order in modules Michael S <already5chosen@yahoo.com> - 2025-04-01 23:10 +0300
              Re: Pre-main construction order in modules Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-04-01 14:20 -0700
              Re: Pre-main construction order in modules James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-04-01 18:57 -0400
              Re: Pre-main construction order in modules David Brown <david.brown@hesbynett.no> - 2025-04-02 10:29 +0200

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