C++ Logo


Advanced search

Re: [wg14/wg21 liaison] SG21 talking about C compatibility of Contracts syntax tomorrow

From: Tom Honermann <tom_at_[hidden]>
Date: Wed, 26 Jul 2023 17:50:23 -0400
I intend to raise the topic of system headers during this discussion.
Use of contract annotations on C standard library functions would bring
clear benefit to C++ programmers, but would require such annotations to
be present in system headers. If WG21 adopts a contracts syntax that is
not amenable to C or WG14, that would create the potential for WG14 to
adopt a different syntax for C (at some point) either for a similar
contracts facility or for contract-like features like Clang's
nullability attributes
or the proposed bounds checking annotations
I can imagine that C standard library implementors might experience some
amount of consternation if different annotations were to be required for
different languages. Likewise for programmers that provide libraries for
use with both C and C++. I encourage anyone with opinions on this matter
to attend.


On 7/26/23 1:33 PM, Timur Doumler via Liaison wrote:
> Dear WG14/WG21 liaison study group,
> At our SG21 (Contracts) telecon tomorrow we will be looking at P2885
> "Requirements for a Contracts syntax"
> <https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2885r0.pdf>.
> One of the questions that this paper asks, and that we intend to poll,
> is (see section 5.8 on page 11):
> "Should the Contracts syntax also be standardisable for the C
> programming language? Note that this might be a subset of the syntax
> adopted by WG21, or an alternative spelling for the same constructs
> that is supported by both languages."
> If any of you would like to contribute to this discussion, you're very
> welcome to join. Apologies for the short notice.
> The telecon is taking place tomorrow – Thursday, 27 July 2023, at
> 15:00 UTC (8 AM Pacific / 11 AM Eastern / 16:00 BST / 17:00 CEST).
> That's 21h 30mins from now. Agenda and Zoom link can be found on the
> wiki page:
> https://wiki.edg.com/bin/view/Wg21telecons2023/Teleconference2023-07-27
> Cheers,
> Timur
> _______________________________________________
> Liaison mailing list
> Liaison_at_[hidden]
> Subscription:https://lists.isocpp.org/mailman/listinfo.cgi/liaison
> Link to this post:http://lists.isocpp.org/liaison/2023/07/1220.php

Received on 2023-07-26 21:50:25