Sujet : Re: Two questions on arrays with size defined by variables
De : janis_papanagnou+ng (at) *nospam* hotmail.com (Janis Papanagnou)
Groupes : comp.lang.cDate : 09. Feb 2025, 18:20:04
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <voao44$o6uh$3@dont-email.me>
References : 1 2 3 4
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On 09.02.2025 16:15, Andrey Tarasevich wrote:
On Sun 2/9/2025 1:54 AM, Janis Papanagnou wrote:
That you can rely only, say,
rely on it with C99 but maybe not before and not in later C standards
conforming compilers?
Things take some wild swings wrt to VLA support as you progress through
various C standards beginning. Before C99 there was no VLA. In C99
everything VLA is required. In C11 everything VLA is optional. C23 takes
a hybrid approach: the whole thing is required, except support for
declaring automatic VLA objects is optional.
Interesting, and scary! - Thanks!
[...]
For my purpose it would be okay to know whether with the C99 version
(that I used) it's okay, or whether that's some GNU specific extension
or some such.
Formally, if you want to declare local (automatic) VLAs, then the only
version of C standard with which you are completely okay is C99. Later
versions make things more problematic.
Hmm.. - okay. - Thanks!
However, GNU seems to be dedicated to supporting everything VLA-related.
Janis
Two questions on arrays with size defined by variables
Re: Two questions on arrays with size defined by variables