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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: how cast works?
Date: Thu, 08 Aug 2024 12:29:02 -0700
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Thiago Adams <thiago.adams@gmail.com> writes:
[...]
> For constexpr the compiler does not accept initialization invalid types.
> for instance.
>
>  constexpr char s = 12345;
>
> <source>:6:21: error: constexpr initializer evaluates to 12345 which
> is not exactly representable in type 'const char'
>     6 |  constexpr char s = 12345;

The problem there is the value, not the type.  This:

    constexpr char s = 10;

is perfectly valid.  The initializer is of type int, not char, but it's
implicitly converted.

[...]

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */