Accept \p{nv=-0} #19577
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Accept \p{nv=-0} #19577
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github changed the issue to 16867 when I typed in the CORRECT ISSUE NUMBER which is #17279 which I got this time by giving it a full link which it then abbreviated |
In case anyone else was curious about this, the character is: U+0F33 TIBETAN DIGIT HALF ZERO |
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On 4/1/22 08:50, Dagfinn Ilmari Mannsåker wrote:
the only negative numeric value character in Unicode;
In case anyone else was curious about this, the character is:
U+0F33 TIBETAN DIGIT HALF ZERO
And if you're really curious, read
https://www.babelstone.co.uk/Blog/2007/04/numbers-that-dont-add-up-tibetan-half.html
The --0.5 one is especially controversial, but I didn't see any articles
about it in particular. Apparently there is zero (no pun intended)
evidence of it being actually used.
Unicode is more strict nowadays about what they encode.
… ༳
Category: No (Number, Other); East Asian width: N (neutral)
Unicode block: 0F00..0FFF; Tibetan
Numeric value: -1/2
Bidi: L (Left-to-Right)
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Some platforms already ignore the minus sign. The Unicode standard says the minus sign should be ignored always. (But always doing so would cause it to not properly get the only negative numeric value character in Unicode; I have submitted a ticket to Unicode about this. Nevertheless, it is in keeping with the letter and spirit of the standard for the leading minus to be ignored for -0)
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Some platforms already ignore the minus sign. The Unicode standard says
the minus sign should be ignored always.
(But always doing so would cause it to not properly get the only
negative numeric value character in Unicode; I have submitted a ticket
to Unicode about this. Nevertheless, it is in keeping with the letter
and spirit of the standard for the leading minus to be ignored for -0)
Note that -0 not being treated as legal was being tested for. This was the result of a fuzzing operation trying this out and getting assertion failures (#16867), and not because the old behavior was desired. When this P.R is merged, I'll open a ticket to create a new test for that failure. It's not immediately obvious to me, since it was generated by fuzzing.