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From: Bonita Montero <Bonita.Montero@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: constexpr keyword is unnecessary
Date: Sun, 20 Oct 2024 18:12:27 +0200
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Am 20.10.2024 um 03:56 schrieb Thiago Adams:

> I used to find const confusing, as it sometimes meant 'read-only' and 
> other times 'immutable.'
> Now, it seems less confusing to me. When const is used with variables 
> that can be initialized (init-declarator), it acts as 'immutable,' 
> meaning the storage is constant.
> In other contexts, like function parameters, const means 'read-only' 
> because we don’t know if the storage is constant or not.

I'm asking myself what should be confusing with constexpr.


> It’s also interesting to note that constexpr acts as a storage 
> qualifier. What the compiler needs to know when evaluating an expression 
> at compile time, without depending on flow analysis, is the guarantee 
> that the object is immutable. This makes it safe to use the value it has 
> at initialization when the initialization is also a compile time 
> expression.
> 
> const used in variables that can be initialized gives the compiler the 
> same guarantees.
> 
> 
> 
> 
> 
> 
> 
>