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Re: Move semantics with literals

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From Jonathan Lamothe <jonathan@jlamothe.net>
Newsgroups comp.lang.c++
Subject Re: Move semantics with literals
Date Tue, 14 Apr 2026 11:01:22 -0400
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boltar@caprica.universe writes:

> To my chagrin I got caught out by this trick question in an interview:
>
> int func(int &&a)
> {
>         return a * 2;
> }
>
>
> :
>         int b = func(123);
> :
>
> Where the question was "what would happen". I assumed it wouldn't compile
> being a reference to a literal but it does. So I'm just wondering why on
> earth and when would you ever do the above? Is there some wierd use case?

The only use case I can see is tricky interview questions.  ;)

-- 
Regards,
Jonathan Lamothe
https://jlamothe.net

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Move semantics with literals boltar@caprica.universe - 2026-04-14 14:57 +0000
  Re: Move semantics with literals Jonathan Lamothe <jonathan@jlamothe.net> - 2026-04-14 11:01 -0400
    Re: Move semantics with literals wij <wyniijj5@gmail.com> - 2026-04-14 23:04 +0800
    Re: Move semantics with literals Jonathan Lamothe <jonathan@jlamothe.net> - 2026-04-14 11:10 -0400
      Re: Move semantics with literals David Brown <david.brown@hesbynett.no> - 2026-04-14 17:26 +0200
      Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-14 18:25 +0200
        Re: Move semantics with literals Jonathan Lamothe <jonathan@jlamothe.net> - 2026-04-14 13:02 -0400
        Re: Move semantics with literals boltar@caprica.universe - 2026-04-15 08:18 +0000
          Re: Move semantics with literals Paavo Helde <eesnimi@osa.pri.ee> - 2026-04-15 12:50 +0300
          Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-15 14:24 +0200
            Re: Move semantics with literals boltar@caprica.universe - 2026-04-15 15:07 +0000
              Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-15 17:49 +0200
              Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-15 17:51 +0200
                Re: Move semantics with literals boltar@caprica.universe - 2026-04-16 08:29 +0000
                Re: Move semantics with literals scott@slp53.sl.home (Scott Lurndal) - 2026-04-16 14:41 +0000
                Re: Move semantics with literals Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-04-18 06:41 -0400
              Re: Move semantics with literals Richard Damon <Richard@Damon-Family.org> - 2026-04-18 12:46 -0400
            Re: Move semantics with literals "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-04-15 23:08 -0700
              Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-16 09:02 +0200
                Re: Move semantics with literals "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-04-16 04:39 -0700
    Re: Move semantics with literals boltar@caprica.universe - 2026-04-14 15:10 +0000
      Re: Move semantics with literals Jonathan Lamothe <jonathan@jlamothe.net> - 2026-04-14 11:15 -0400
      Re: Move semantics with literals scott@slp53.sl.home (Scott Lurndal) - 2026-04-14 17:17 +0000
        Re: Move semantics with literals Jonathan Lamothe <jonathan@jlamothe.net> - 2026-04-14 13:36 -0400
          Re: Move semantics with literals boltar@caprica.universe - 2026-04-15 08:21 +0000
      Re: Move semantics with literals Andrey Tarasevich <noone@noone.net> - 2026-04-18 10:16 -0700
        Re: Move semantics with literals boltar@caprica.universe - 2026-04-19 08:59 +0000
          Re: Move semantics with literals boltar@caprica.universe - 2026-04-19 09:09 +0000
          Re: Move semantics with literals Andrey Tarasevich <noone@noone.net> - 2026-04-19 12:01 -0700
  Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-14 17:14 +0200
    Re: Move semantics with literals boltar@caprica.universe - 2026-04-14 15:23 +0000
      Re: Move semantics with literals Bonita Montero <Bonita.Montero@gmail.com> - 2026-04-14 18:23 +0200
  Re: Move semantics with literals Andrey Tarasevich <noone@noone.net> - 2026-04-18 09:27 -0700
    Re: Move semantics with literals Andrey Tarasevich <noone@noone.net> - 2026-04-18 09:46 -0700

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