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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: A glitch regarding the usual malloc() idiom
Date: Sat, 23 Jul 2016 13:03:39 -0700
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Udyant Wig <udyant.wig@gmail.com> writes:
> On 07/22/2016 01:09 AM, James Kuyper wrote:
>> What do you think prefix operators look like? My only expectation for
>> prefix operators is that they precede the the thing that they operate
>> on, and sizeof certainly meets that criterion.
>
> From what I read and gathered from that lkml thread, I guess that Linus
> Torvalds was objecting to treating sizeof as a prefix operator because
> other prefix operators such as prefix ++ and -- operate on lvalues
> whereas sizeof, by admitting use of type names, does not (at least not
> wholly.)

It's not about lvalues.  The &, *, +, -, ~, and ! unary operators
do not require an lvalue operand.

[...]

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"