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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: James Kuyper Newsgroups: comp.lang.c Subject: Re: question about nullptr Date: Mon, 8 Jul 2024 11:03:42 -0400 Organization: A noiseless patient Spider Lines: 24 Message-ID: References: <20240706054641.175@kylheku.com> <877cdyuq0f.fsf@bsb.me.uk> <2ckiO.19403$7Ej.4487@fx46.iad> <87plrpt4du.fsf@bsb.me.uk> <9bCiO.7108$sXW9.3805@fx41.iad> <87jzhwu5v9.fsf@bsb.me.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Injection-Date: Mon, 08 Jul 2024 17:03:43 +0200 (CEST) Injection-Info: dont-email.me; posting-host="82ac0bc5ac8679abf13c09bba0ac1135"; logging-data="975879"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/ZNu9x6XQqWnRz3vhxB45Y5cM27XlTAsQ=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:ig8LHws1Il2GohKToWPaCyFjgec= Content-Language: en-US In-Reply-To: <87jzhwu5v9.fsf@bsb.me.uk> Bytes: 2149 On 7/7/24 19:42, Ben Bacarisse wrote: > scott@slp53.sl.home (Scott Lurndal) writes: .... >> I.e. it can either be a null pointer or the value zero >> depending on context, which makes it ambiguous to the casual >> reader. Particularly when reading code that someone >> else has written. NULL makes the programmers intent crystal >> clear. > > That's a rather niche readership -- one that might consider > > char *p = 0; > > unclear. Do you want such people reading your C code with a view to > working on it? The problem is not "char p=0;". If you're sure what type p has, there's no problem. The problem comes with code like "p=0", where "p=NULL" would serve to remind you that p should be a pointer, while "p=nullptr" guarantees a diagnostic if p is not a pointer. I have fixed bugs which would have been caught a lot earlier if nullptr had existed, and had been the only permitted kind of null pointer constant.