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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: double free
Date: Tue, 12 Jul 2016 09:16:14 -0700
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BartC <bc@freeuk.com> writes:
[...]
> sizeof needs parentheses anyway when applied to a type, so necessarily 
> have to look like a function call. (And I suspect most don't even know 
> whether it is types or expressions that don't require the parentheses, 
> so add them just in case!)

When I write C code, I don't cater to an audience that doesn't know
C.  Someone who doesn't understand what `sizeof n` or `sizeof *p`
means is likely to have a hard time reading my code.  The solution
(which you seem to object to) is to learn the language.

When I apply sizeof to a parenthesized type name, I leave a space
between the keyword and the "(":

    sizeof (int)

(I do the same if the operand happens to be a parenthesized
expression, though that's fairly rare.)

When I write a function call, the function name and the "(" are
adjacent:

    func(arg)

You can argue that `sizeof (int)` looks like a function call (*if* you
pretend that "sizeof" is an ordinary identifier rather than a keyword
and that "int" is an expression), but a reasonable coding style can (and
IMHO should) make them visually distinct.

-- 
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"