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From: Thiago Adams <thiago.adams@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: constexpr keyword is unnecessary
Date: Sat, 19 Oct 2024 16:35:37 -0300
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Em 10/19/2024 1:53 PM, Michael S escreveu:
> On Sat, 19 Oct 2024 12:18:04 -0300
> Thiago Adams <thiago.adams@gmail.com> wrote:
> 
>> Em 10/18/2024 8:54 PM, Keith Thompson escreveu:
>>> Thiago Adams <thiago.adams@gmail.com> writes:
>>>> I think constexpr keyword is unnecessary.
>>>
>>> Sure, most language features are strictly unnecessary.
>>>    
>>>> Anything you do with it could/should be done with const.
>>>
>>> No, absolutely not.
>>>    
>>
>> If not, do you have a sample where, using "const" as "constexpr",
>> would create problems?
>>
>> The sample I know is VLA.
>>
>> const int c = 2;
>> int a[c]; //a is VLA because c is not a constant expression.
>>
>>
>> But this is not enough to convince me because it is better not to be
>> a VLA here.
>>
>>
>>
> 
> const int c = 2;
> struct bar {
>    int a[c];
>    int b;
> };
> 
> 

Yes, but in this case, you're changing something that was previously an 
error into something that now works.