Path: ...!feeds.phibee-telecom.net!news.mixmin.net!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: Sat, 12 Oct 2024 06:39:30 +0200
Organization: A noiseless patient Spider
Lines: 34
Message-ID: <vecuhe$1o44$1@raubtier-asyl.eternal-september.org>
References: <veb5fi$3ll7j$1@dont-email.me>
 <vebp8r$3ok6d$1@raubtier-asyl.eternal-september.org>
 <vebpo5$3olu3$1@dont-email.me>
 <vebtjp$3p9sm$1@raubtier-asyl.eternal-september.org>
 <vebubq$3p8oj$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 12 Oct 2024 06:39:10 +0200 (CEST)
Injection-Info: raubtier-asyl.eternal-september.org; posting-host="2e9c154056f6d626eb2d18ab0ff00436";
	logging-data="57476"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/sEsDZcR7NbBumXU/xjs1htVvJkfpuVcU="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:ejuVmshSUUto4OHhDxSRKHeQvbE=
In-Reply-To: <vebubq$3p8oj$1@dont-email.me>
Content-Language: de-DE
Bytes: 2389

Am 11.10.2024 um 21:30 schrieb Thiago Adams:
> Em 10/11/2024 4:17 PM, Bonita Montero escreveu:
>> Am 11.10.2024 um 20:11 schrieb Thiago Adams:
>>
>>
>>
>>> constant expression make sense in C. It is not new, it is very old.
>>
>> const has a definition and it allows non compile-time evaluated
>> variables.
> 
> yes. but?

With constexpr you could enforce that the expression you assign is
compile-time evaluated. That's while constexpr would make sense.

> What I am suggesting again is remove the keyword constexpr. make const 
> do that.
> 
> Just to remember C++ was already like that before constexpr. In c++ 
> const could be used as constant expressions.
> What C++ could not ensure is that global variables would have a compile 
> time initialization.
> In C all global variables are initialized in compile time.
> For local variables like...
> 
> const int i = ... ;
> the compiler must evaluate the initialization expression if it can be 
> computed in compile time then i is "constexpr" does not matter if it 
> have or not the constexpr keyword.
> 
> 
>