Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.c
Subject: Re: "span"
Date: Sun, 24 Mar 2024 01:28:17 +0000
Organization: A noiseless patient Spider
Lines: 36
Message-ID: <87wmpsh0zy.fsf@bsb.me.uk>
References: <span-20240322122631@ram.dialup.fu-berlin.de>
	<utjrbm$2st57$1@dont-email.me> <878r29iyvd.fsf@bsb.me.uk>
	<88f3b4c1-6dad-4fec-8941-fc4e4e755cd1@gmail.com>
	<871q80zkg3.fsf@nosuchdomain.example.com>
MIME-Version: 1.0
Content-Type: text/plain
Injection-Info: dont-email.me; posting-host="ac39b37d4face64cd212e73c06f03235";
	logging-data="4174104"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+Tpo31CNOrKWQA7Fxl8s23c4CINUoTH1s="
User-Agent: Gnus/5.13 (Gnus v5.13)
Cancel-Lock: sha1:QCy1fGB/SH/VLtenMz672IMkmkU=
	sha1:XRVAkGEkCh89ApKXAeHt9xmxeLo=
X-BSB-Auth: 1.5b8c499777fee4888e64.20240324012817GMT.87wmpsh0zy.fsf@bsb.me.uk
Bytes: 2341

Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

> Thiago Adams <thiago.adams@gmail.com> writes:
>> Em 3/22/2024 9:19 PM, Ben Bacarisse escreveu:
>>> Thiago Adams <thiago.adams@gmail.com> writes:
> [...]
>>>> void f(int n, int a[n])
>>> Although you can't rely on this anymore since it's now an optional
>>> part of the language.
>>
>> I think it is back in c23.
>> But not vlas.
> [...]
>
> Correct.
>
> From N1570 (the last public draft before C11):
>
>     __STDC_NO_VLA__ The integer constant 1, intended to indicate that
>         the implementation does not support variable length arrays or
>         variably modified types.
>
> From N3220 (the first public draft of C26, essentially equivalent to C23):
>
>     __STDC_NO_VLA__ The integer constant 1, intended to indicate that
>         the implementation does not support variable length arrays with
>         automatic storage duration. Parameters declared with variable
>         length array types are adjusted and then define objects of
>         automatic storage duration with pointer types. Thus, support for
>         such declarations is mandatory.

Has C23 been ratified yet?  The fact that there's a draft of C26
suggests it has been, but the news passed me by.

-- 
Ben.