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Re: [SG16] Draft Named Escape Sequences

From: Tom Honermann <tom_at_[hidden]>
Date: Wed, 3 Nov 2021 15:14:50 -0400
On 11/3/21 2:07 PM, Jens Maurer wrote:
> On 03/11/2021 03.07, Steve Downey via SG16 wrote:
>> Updated paper with wording for UCN form of named unicode characters, with changes as suggested by Jens. This reflects the strongest consensus in EWG for exact matches.
> Thanks.
> The prose text of the paper says:
> "The floating reference to ISO/IEC 10646 indicates a dependence on the version that is
> current at the time of standardization. Thus, conformance with the C++ standard will
> require conformance with the latest available publication of ISO/IEC 10646."
> This means all implementations of C++ will become non-conforming the instant
> a new version of ISO 10646 is published. I don't think we should permit a
> foreign entity such as the ISO committee for ISO 10646 to render C++
> implementations non-conforming in a whim.
> Put differently, a compiler can no longer meaningfully state
> "conforming to ISO 14882:2020" (because that's a moving target);
> it always needs to say "conforming to ISO 14882:2020 and
> ISO 10646:2017" or so.
> I think we should do better by hardcoding the ISO 10646 version
> used for the character names in each C++ release.
> Yes, that require a manual (or editorial?) update for each new
> release of C++, but that's not unlike our reference to the C standard,
> and helps maintain overall sanity.

That also gives us an opportunity to validate that new additions aren't
problematic in some way.


Received on 2021-11-03 14:14:53