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Re: Is std::move() a misleading misnomer?

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15.07.2022 15:02 Juha Nieminen kirjutas:
> Let's take a relatively simple line of code:
> 
>      v1 = std::move(v2);
> 
> What does that do? Well, we know for certain (at least if the type of 'v1'
> and 'v2' has been logically implemented) that 'v1' will contain what
> 'v2' contained before this statement.
> 
> But what will 'v2' contain?
> 
> It depends. (More particularly, it depends on whether the type in
> question implements a move assignment operator, and it has been
> implemented in the recommended way.)

Yes, it is a bit misleading name, but not so much as e.g. "static" or 
"inline" ;-)

That's also why when I'm implementing move ctor/assignment for my 
classes, I always take care to make v2 properly "empty" even when not 
needed technically, just for consistency.

In general one shouldn't care about what state v2 is left in, so the 
issue is moot.

In case I care, e.g. when preparing a data structure containing 
single-threaded smart pointers to be sent over to another thread, I add 
an extra assert line to be sure the move actually emptied v2.

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Is std::move() a misleading misnomer? Juha Nieminen <nospam@thanks.invalid> - 2022-07-15 12:02 +0000
  Re: Is std::move() a misleading misnomer? Bonita Montero <Bonita.Montero@gmail.com> - 2022-07-15 14:43 +0200
  Re: Is std::move() a misleading misnomer? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-07-15 06:18 -0700
    Re: Is std::move() a misleading misnomer? Bonita Montero <Bonita.Montero@gmail.com> - 2022-07-15 19:09 +0200
  Re: Is std::move() a misleading misnomer? Bo Persson <bo@bo-persson.se> - 2022-07-15 16:01 +0200
    Re: Is std::move() a misleading misnomer? Juha Nieminen <nospam@thanks.invalid> - 2022-07-16 18:21 +0000
      Re: Is std::move() a misleading misnomer? Bo Persson <bo@bo-persson.se> - 2022-07-16 21:11 +0200
        Re: Is std::move() a misleading misnomer? Juha Nieminen <nospam@thanks.invalid> - 2022-07-17 14:28 +0000
  Re: Is std::move() a misleading misnomer? Gawr Gura <gawrgura@mail.hololive.com> - 2022-07-15 08:34 -0700
  Re: Is std::move() a misleading misnomer? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2022-07-15 16:03 +0000
    Re: Is std::move() a misleading misnomer? Bonita Montero <Bonita.Montero@gmail.com> - 2022-07-15 19:12 +0200
      Re: Is std::move() a misleading misnomer? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2022-07-16 19:24 +0000
  Re: Is std::move() a misleading misnomer? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-07-15 23:08 +0200
  Re: Is std::move() a misleading misnomer? Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-16 11:48 +0300
  Re: Is std::move() a misleading misnomer? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-07-16 16:31 -0700
    Re: Is std::move() a misleading misnomer? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2022-07-16 18:32 -0700
      Re: Is std::move() a misleading misnomer? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-07-19 16:41 -0700
  Re: Is std::move() a misleading misnomer? wij <wyniijj2@gmail.com> - 2022-07-18 16:14 -0700
    Re: Is std::move() a misleading misnomer? Bonita Montero <Bonita.Montero@gmail.com> - 2022-07-19 07:59 +0200
  Re: Is std::move() a misleading misnomer? Anthony Capobianco <kiiwy112@gmail.com> - 2022-07-20 05:11 -0700
    Re: Is std::move() a misleading misnomer? Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-20 15:26 +0300
    Re: Is std::move() a misleading misnomer? Manfred <noname@add.invalid> - 2022-07-21 01:16 +0200
    Re: Is std::move() a misleading misnomer? "Fred. Zwarts" <F.Zwarts@KVI.nl> - 2022-07-21 09:47 +0200
    Re: Is std::move() a misleading misnomer? Juha Nieminen <nospam@thanks.invalid> - 2022-07-21 09:05 +0000
      Re: Is std::move() a misleading misnomer? Paavo Helde <eesnimi@osa.pri.ee> - 2022-07-21 13:12 +0300
      Re: Is std::move() a misleading misnomer? red floyd <no.spam.here@its.invalid> - 2022-07-21 13:09 -0700
  Re: Is std::move() a misleading misnomer? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-07-20 13:08 -0700

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