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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: question about nullptr
Date: Mon, 08 Jul 2024 13:32:38 -0700
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scott@slp53.sl.home (Scott Lurndal) writes:
> Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
[...]
>>In C23, I'll use nullptr rather than NULL *if* I don't care about
>>portability to pre-C23 compilers.  (I use nullptr in C++.)
>
> I haven't made the transition to nullptr in C++ yet, too many years
> of using NULL and code bases that need to compile with older
> standards (pre C++11, until very recently) - granted one might
>
> #define nullptr (void *)NULL

I've thought about doing something like that, but I haven't had the
opportunity so far, and I'm not sure I would.

I might write something like:

    #if __STDC_VERSION__ < 202311L
    #define nullptr ((void*)NULL)
    #endif

But if I had to compile with both pre-C23 and newer compilers, I'd be
more likely to just use NULL (with a cast where necessary).  I'd
consider the `#define nullptr` trick if pre-C23 compilers were rare.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */