Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!raubtier-asyl.eternal-september.org!.POSTED!not-for-mail
From: Bonita Montero <Bonita.Montero@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: constexpr keyword is unnecessary
Date: Sun, 13 Oct 2024 15:14:32 +0200
Organization: A noiseless patient Spider
Lines: 40
Message-ID: <vegh32$mi48$1@raubtier-asyl.eternal-september.org>
References: <veb5fi$3ll7j$1@dont-email.me> <vedv0a$5m19$1@dont-email.me>
 <veeqhi$ar0c$2@dont-email.me> <veg59o$kolq$1@dont-email.me>
 <vegbeb$llri$2@dont-email.me>
 <vegc3l$lqrd$1@raubtier-asyl.eternal-september.org>
 <vegevc$m5na$1@dont-email.me>
 <vegg4q$mdj0$1@raubtier-asyl.eternal-september.org>
 <veggq8$mbh9$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Sun, 13 Oct 2024 15:14:10 +0200 (CEST)
Injection-Info: raubtier-asyl.eternal-september.org; posting-host="c70044d56ce67ca2d81b0f66bfd60be6";
	logging-data="739464"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19nV2OkBtkqxn5Miv2i3zcRsXcV5QEzowU="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:NIlbvDK/Ohho15nom4dTYB22Jnc=
Content-Language: de-DE
In-Reply-To: <veggq8$mbh9$1@dont-email.me>
Bytes: 2647

Am 13.10.2024 um 15:09 schrieb Thiago Adams:
> Em 10/13/2024 9:58 AM, Bonita Montero escreveu:
>> Am 13.10.2024 um 14:38 schrieb Thiago Adams:
>>> Em 10/13/2024 8:49 AM, Bonita Montero escreveu:
>>>> Am 13.10.2024 um 13:37 schrieb Thiago Adams:
>>>>
>>>>> Yes.
>>>>> constexpr is like - "require the initializer to be a constant 
>>>>> expression." But the compiler will have to check it anyway.
>>>>
>>>> I cannot understand why you are so militantly against this
>>>> new language feature that can be understood in 10 seconds.
>>>>
>>>
>>> I have seen code like this:
>>>
>>> void func()
>>> {
>>>     constexpr int c = 1;
>>>     f(c);
>>> }
>>>
>>> For some reason, people believe that adding constexpr will magically 
>>> improve optimization. In reality, it doesn't change anything compared 
>>> to const and often reflects a misunderstanding of how the compiler 
>>> works. As a result, I end up having to explain it. In this sense, 
>>> constexpr is viral and spreads confusion.
>>
>> constexpr doesn't hurt.
> 
> 
> It spreads confusion, ...

It can be understood in 10s.

> ... and makes code incompatible with previous versions  of C "for free".

New improvements are always incompatible and there are mature C23
compilers.