mattn/go-runewidth

Inconsistent behavior under different operating systems

Equationzhao opened this issue · 1 comments

Equationzhao commented 
dot := '\uF111' // a dot
println(runewidth.RuneWidth(dot))

/*
    Linux(wsl):1 (correct)
    Windows 11:2 (incorrect)
*/

go version: 1.20.4

arp242 commented

U+F111 is private use; it's impossible for this library to know the correct width.

IsEastAsian() probably returns something different on your systems(?) That depends on your locale.

I don't know if Unicode says something about the width of private use characters. I think not? Probably not a bug here.

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