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Re: [isocpp-sg16] Unicode identifiers in the source code

From: Mateusz Pusz <mateusz.pusz_at_[hidden]>
Date: Sun, 30 Jun 2024 17:22:02 +0200
It makes sense to me.

We are going to discuss `fixed_string` and units at the upcoming SG16
meeting, so maybe we should poll this to get the official SG16
recommendation.

niedz., 30 cze 2024 o 17:17 Alisdair Meredith <alisdairm_at_[hidden]> napisał(a):

> I would not be so quick to abandon the idea, as I think many common units
> and modifiers like micro will be supported, although it may mean
> approximating
> with the original greek letters.
>
> I would not be in favour of extending beyond what Unicode has chosen to
> support.
> I believe that part of the database is supposed to be stable, and I don’t
> want to
> argue with the body of world experts on what is a reasonable choice for
> multilingual
> identifiers, even if we think they got it wrong! As C++ experts, we have
> more
> important places to focus our attention.
>
> So support what is supported — in technical code bases that are prepared to
> invest in broader Unicode support for code entry, that would definitely
> lead to
> clearer code, and on a subject that this library itself is addressing
> because
> precision (and clarity) matters.
>
> AlisdairM
>
> > On 30 Jun 2024, at 11:11, Mateusz Pusz <mateusz.pusz_at_[hidden]> wrote:
> >
> > Thanks, Alisdair!
> >
> > If this is the case, we should probably abandon the idea, or if we
> really care about it, think about extending the allowed Unicode range.
> >
> > niedz., 30 cze 2024 o 17:09 Alisdair Meredith <alisdairm_at_[hidden]>
> napisał(a):
> > I believe the diagnostics you receive are correct — the later symbols do
> > not have the XID_Start property, e.g.,
> > https://codepoints.net/U+2103
> >
> > AlisdairM
> >
> > > On 30 Jun 2024, at 10:56, Mateusz Pusz via SG16 <sg16_at_[hidden]>
> wrote:
> > >
> > > Hi,
> > >
> > > During the recent LEWGI discussion on the units library, people in the
> room suggested that in addition to the regular "ASCII" version, we should
> also provide Unicode symbols for unit identifiers. It seems that with
> P1949R7, this could be possible.
> > >
> > > However, when I tried this in the code, I was able to make the
> following work:
> > >
> > > inline constexpr auto µΩ = micro<si::ohm>;
> > >
> > > but not:
> > >
> > > inline constexpr auto ℃ = degree_Celsius;
> > > inline constexpr auto ° = degree;
> > > inline constexpr auto ′ = arcminute;
> > > inline constexpr auto ″ = arcsecond;
> > >
> > > Are those outside of the supported range and should not be supported,
> or is it just the lack of proper support in the compilers I use (gcc-14 and
> clang-18)?
> > >
> > > Even if this can work, is it a good idea?
> > >
> > > Best
> > >
> > > Mat
> > > --
> > > SG16 mailing list
> > > SG16_at_[hidden]
> > > https://lists.isocpp.org/mailman/listinfo.cgi/sg16
> >
>
>

Received on 2024-06-30 15:22:15