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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 11:10:31 -0400
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Jonathan Lamothe <jonathan@jlamothe.net> writes:

> 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.  ;)

More seriously though, I'm not sure off-hand, but this feels like a case
of undefined behaviour.  At any rate, it's terrible for the clarity of
the code, which I try to prioritize.

I hate it when job interview questions don't actually reflect the kind
of work you'll be expected to do.  Though, if this *is* the
expectation... bullet dodged, I guess?

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