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Groups > comp.lang.c++ > #82232
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: That's while I love C++ over C |
| Date | 2021-11-05 22:46 -0700 |
| Organization | None to speak of |
| Message-ID | <87r1btygxh.fsf@nosuchdomain.example.com> (permalink) |
| References | (3 earlier) <sm4b17$ioh$1@dont-email.me> <sm4eeq$97q$1@redfloyd.dont-email.me> <sm5234$ff1$2@dont-email.me> <sm53gd$nse$1@dont-email.me> <sm53oi$o51$2@redfloyd.dont-email.me> |
red floyd <no.spam.here@its.invalid> writes:
> On 11/5/2021 10:23 PM, Chris M. Thomasson wrote:
>> On 11/5/2021 9:59 PM, Chris M. Thomasson wrote:
>>> On 11/5/2021 4:24 PM, red floyd wrote:
>>>> On 11/5/2021 3:25 PM, Lynn McGuire wrote:
>>>>> On 11/5/2021 4:59 PM, Vir Campestris wrote:
>>>> [insanely ugly, unreadable, and unmaintainable code fragments redacted]
>>>>>>
>>>>>> If you wrote that code in anything in my company I would
>>>>>> downvote the review.
>>>>>>
>>>>>> Any of those versions.
>>>>> I would fire him.
>>>>
>>>> I was going to say something along the lines of what either you or Vir
>>>> said. I might not fire, but I would insist on further training.
>>>>
>>>
>>> Indeed! Further training, or make her read the coding rules of the
>>> team again.
>> Ohhh, shit. I vaguely remember using the conditional expression ? :
>> in a really nasty macro to avoid an if/else... If I could find that
>> code, you would probably think about firing me! Probably not for the
>> ? :, but for the damn macro internals! Luckily, it was for my on
>> personal use. Yikes!
>
> As with everything else in C++, there's nothing wrong with the
> conditional operator ... in the right place. The left hand side of
> an assignment is NOT the right place. Using the result of a conditional
> as an rvalue is just fine, I use it all the time.
Why?
Seriously, the C++ standard (unlike the C standard) is clear that a
conditional expression can be an lvalue if its second and third operands
are both lvalues of the same type (I'm oversimplifying the rules a bit).
In other words, the language explicitly allows a conditional expression
to be the LHS of an assignment. Why do you object to taking advantage
of that feature?
I don't think I knew about it before seeing this discussion, but now
that I do, the meaning of
(x == y ? a : b) = c;
seems perfectly clear to me. The alternative:
if (x == y) {
a = c;
}
else {
b = c;
}
is more verbose and could be problematic if c is a complicated
expression; the risk is that a later maintainer might modify one
instance of c and not the other. And creating a pointer variable:
auto p = x == y ? &a : &b;
*p = c;
seems silly when you can just use the conditional operator directly.
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Philips
void Void(void) { Void(); } /* The recursive call of the void */
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That's while I love C++ over C Bonita Montero <Bonita.Montero@gmail.com> - 2021-11-03 20:39 +0100
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-03 20:28 +0000
Re: That's while I love C++ over C Vir Campestris <vir.campestris@invalid.invalid> - 2021-11-05 21:59 +0000
Re: That's while I love C++ over C Lynn McGuire <lynnmcguire5@gmail.com> - 2021-11-05 17:25 -0500
Re: That's while I love C++ over C red floyd <no.spam.here@its.invalid> - 2021-11-05 16:24 -0700
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-05 23:46 +0000
Re: That's while I love C++ over C Tony Oliver <guinness.tony@gmail.com> - 2021-11-05 17:48 -0700
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-06 01:40 +0000
Re: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 02:32 +0000
Re: That's while I love C++ over C red floyd <no.spam.here@its.invalid> - 2021-11-05 20:18 -0700
Re: That's while I love C++ over C "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-11-06 04:48 +0100
Re: That's while I love C++ over C James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-11-06 00:34 -0400
Re: That's while I love C++ over C Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-11-05 22:48 -0700
Re: That's while I love C++ over C red floyd <no.spam.here@its.invalid> - 2021-11-05 22:26 -0700
Re: That's while I love C++ over C Bonita Montero <Bonita.Montero@gmail.com> - 2021-11-06 07:37 +0100
Re: That's while I love C++ over C Bonita Montero <Bonita.Montero@gmail.com> - 2021-11-06 07:36 +0100
Re: That's while I love C++ over C Ike Naar <ike@sdf.org> - 2021-11-06 06:59 +0000
Re: That's while I love C++ over C David Brown <david.brown@hesbynett.no> - 2021-11-06 11:12 +0100
Re: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 11:08 +0000
Re: That's while I love C++ over C Bonita Montero <Bonita.Montero@gmail.com> - 2021-11-06 15:03 +0100
Re: That's while I love C++ over C Manfred <noname@add.invalid> - 2021-11-06 19:12 +0100
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-06 18:57 +0000
Re: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 20:50 +0000
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-06 11:44 +0000
Re: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 13:18 +0000
Re: That's while I love C++ over C David Brown <david.brown@hesbynett.no> - 2021-11-06 10:58 +0100
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-06 12:00 +0000
Re: That's while I love C++ over C Öö Tiib <ootiib@hot.ee> - 2021-11-06 07:04 -0700
Re: That's while I love C++ over C David Brown <david.brown@hesbynett.no> - 2021-11-06 15:50 +0100
Re: That's while I love C++ over C scott@slp53.sl.home (Scott Lurndal) - 2021-11-06 14:43 +0000
[OT] Algol68 Was: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 17:13 +0000
Re: [OT] Algol68 Was: That's while I love C++ over C scott@slp53.sl.home (Scott Lurndal) - 2021-11-06 20:16 +0000
Re: [OT] Algol68 Was: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-06 20:25 +0000
Re: That's while I love C++ over C "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-11-05 21:59 -0700
Re: That's while I love C++ over C "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-11-05 22:23 -0700
Re: That's while I love C++ over C red floyd <no.spam.here@its.invalid> - 2021-11-05 22:27 -0700
Re: That's while I love C++ over C red floyd <no.spam.here@its.invalid> - 2021-11-05 22:28 -0700
Re: That's while I love C++ over C "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-11-05 22:46 -0700
Re: That's while I love C++ over C Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-11-05 22:46 -0700
Re: That's while I love C++ over C David Brown <david.brown@hesbynett.no> - 2021-11-06 12:25 +0100
Re: That's while I love C++ over C Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-11-06 13:27 -0700
Re: That's while I love C++ over C Manfred <noname@add.invalid> - 2021-11-07 00:38 +0100
Re: That's while I love C++ over C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-11-07 00:33 +0000
Re: That's while I love C++ over C David Brown <david.brown@hesbynett.no> - 2021-11-07 15:10 +0100
Re: That's while I love C++ over C James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-11-08 01:47 -0500
Re: That's while I love C++ over C Bart <bc@freeuk.com> - 2021-11-05 23:35 +0000
Re: That's while I love C++ over C Bonita Montero <Bonita.Montero@gmail.com> - 2021-11-06 07:33 +0100
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