3 ms·

I’m curious: is the no-emoji rule a rule that happens to block emoji or a hardcoded rule? What I mean is: emojis (in UTF-16) have to use surrogate pairs because

I’m curious: is the no-emoji rule a rule that happens to block emoji or a hardcoded rule? What I mean is: emojis (in UTF-16) have to use surrogate pairs because all their code points are in the U+1xxxx plane. Is the software just disallowing any characters needing two code points to encode (which would include emoji)? Or is it specifically singling out the emoji blocks?

kps 6y ago
It seems to have changed recently. I recall a thread about plastics a few months ago where the plastic type symbols (♳ through ♹, i.e. U+2763 through U+2769) disappeared, but I see them now. Edits: ⭕ that post was https://news.ycombinator.com/item?id=25237688 https://news.ycombinator.com/item?id=25237688 ⭕ The rules seem pretty arbitrary. Recycling symbol U+2672 ♲ is allowed but recycled paper symbol U+267C is not. Chess kings ♔ are allowed but checkers kings aren't. ⭕ is allowed (for now). ⭕ I think the right thing to do would be to strip anything with emoji presentation http://unicode.org/reports/tr51/#Presentation_Style http://unicode.org/reports/tr51/#Presentation_Style
- saagarjha 6y ago
  It’s not that simple, as many OSes render characters that aren’t strictly look emoji “as emoji” and there is no standard way to check for this.
wongarsu 6y ago
It's a very deliberate and precise filter. I can write in old persian: "𐎠𐎡𐎢" (codepoints 0x103xx) or CJK "𠀀𠀁𠀂" (codepoints 0x2000x), but can't write "" (emoji with codepoint 0x1F605)
saagarjha 6y ago
The latter.