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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c
Subject: Re: constexpr keyword is unnecessary
Date: Sun, 13 Oct 2024 16:06:45 +0300
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On Sun, 13 Oct 2024 09:38:04 -0300
Thiago Adams <thiago.adams@gmail.com> wrote:

> 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.
> 

I see constexpr primarily as a way to enable use of functions from
math.h in static initializers.