𝟎-𝟗 and 𝟘-𝟡 Identifiers

[ajozefiak]

Implementation of issue #26808

[StefanKarpinski]

Shouldn't this allow all bold and double struck digits, not just 0s and 1s?

[StefanKarpinski]

In fact, looking at this page, maybe all of U+1d7ce through U+1D7FF. It seems like the same reasoning applies to all of these if it applies to any of them. Although maybe not the sans-serif and monospace digits since those are pretty likely to just look like normal digits in many places, as opposed to the bold and double struck ones, which are a common typographical convention.

[Keno]

The consistent thing to do would be to allow all of ND expect ASCII 0-9

[StefanKarpinski]

Consistent, sure, but we might want to normalize some of them first.

[Keno]

Sure, but that's a) an orthogonal concern and b), breaking since we already allow these in identifiers (just not in leading position).

[JeffBezanson]

I vote for adding U+1d7ce through U+1d7e1

[Keno]

Works for me. We can always add more of Nd later if we want.

[JeffBezanson]

A NEWS entry would be good.