Path: ...!feeds.phibee-telecom.net!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: question about nullptr
Date: Mon, 08 Jul 2024 20:17:37 -0700
Organization: A noiseless patient Spider
Lines: 23
Message-ID: <86le2b9ru6.fsf@linuxsc.com>
References: <v6bavg$3pu5i$1@dont-email.me> <20240706054641.175@kylheku.com> <v6bfi1$3qn4u$1@dont-email.me> <l9ciO.7$cr5e.2@fx05.iad> <877cdyuq0f.fsf@bsb.me.uk> <2ckiO.19403$7Ej.4487@fx46.iad> <87plrpt4du.fsf@bsb.me.uk> <9bCiO.7108$sXW9.3805@fx41.iad> <877cdwu9s1.fsf@nosuchdomain.example.com> <20240708222804.00001654@yahoo.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Date: Tue, 09 Jul 2024 05:17:37 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="4404f50b61bba69374b6468dfb9554fc";
	logging-data="1306957"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18rmSDfYEpFqAvesVkYY5WXBBKAs6onFl4="
User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux)
Cancel-Lock: sha1:OSm/tqG827nYaM6x551wITjA7V4=
	sha1:tgTgJpqYdH93gUkDFFFvQ/tppJU=
Bytes: 2029

Michael S <already5chosen@yahoo.com> writes:

> On Sun, 07 Jul 2024 15:17:34 -0700
> Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote:
>
>> I just about always use NULL, not 0, when I want a null pointer
>> constant.  Similarly, I use '\0', not 0, when I want a null character,
>> 0.0 when I want a floating-point zero, and false when I want a Boolean
>> zero.  I just like being explicit.
>
> Pointer:  I very rarely use NULL.
> Character:  I never use '\0'.
> Floating point:  I never use 0.0.
> Boolean:  I use false much more often than 0.

This posting has inspired me to try using (long)0.0
whenever a null pointer constant is needed.  As for
example

    (void*){ (long)0.0 }

as an argument to a variadic function where a pointer
is expected.