Re: _BitInt(N)

From	Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups	comp.lang.c
Subject	Re: _BitInt(N)
Date	2025-11-27 16:39 -0800
Organization	None to speak of
Message-ID	<87a507htwo.fsf@example.invalid> (permalink)
References	(16 earlier) <10g7ue4$r47b$1@dont-email.me> <10g9a0r$1a895$1@dont-email.me> <10g9fmh$1crf0$1@dont-email.me> <87ecpjhvse.fsf@example.invalid> <10gapc8$1tj26$1@dont-email.me>

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bart <bc@freeuk.com> writes:
> On 27/11/2025 23:59, Keith Thompson wrote:
>> bart <bc@freeuk.com> writes:
>>> On 27/11/2025 10:43, David Brown wrote:
>> [...]
>>>> uint64_t get_exponent(double x) {
>>>>       return ((union { double d; uint64_t u;}) { x }.u >> 52)
>>>>                & ((1ull << (62 - 52 + 1)) - 1);
>>>> }
[...]
>> How exactly did clang and msvs express their dislike?  What versions
>> are
>> you using?
>> On my systems, it works correctly with gcc 13.3.0, clang 18.1.3,
>> tcc 0.9.27, Microsoft Visual Studio 2022 17.14.20.
>> If your problem is that you're using older compilers that don't
>> support
>> compound literals, it would have saved some time if you had said so.

Can you *please* do something about the way your newsreader
(apparently Mozilla Thunderbird) mangles quoted text?  That first
quoted line, starting with "> How exactly", would have been just
74 columns, but your newsreader folded it, making it more difficult
to read.  It also deletes blank lines between paragraphs.

I don't recall similar problems from other Thunderbird users.

> I said in a followup that I'd been using a C++ compiler by mistake
> (this was on Godbolt).
>
> That gcc's C++ compiler accepted the code wasn't helpful.

But not surprising, since as you know gcc (and likewise g++) is
not fully conforming by default.  If you're compiling code with the
purpose of making a point about the language, invoke the compiler
in standard-conforming mode.  And if a compiler "doesn't like"
the code you feed it, at least show us the diagnostic messages.

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

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