> Seems like unicode characters throw off the "col" function. The column
> numbering is different between its return and what I see in vi while
> moving around (I get dashed column numbers like 13-11).
The first number is the column [col('.')]. The second is the virtual
column [virtcol('.')].
Unicode chars can have widths other than one, e.g.:
\UFEFF = ZERO WIDTH NO-BREAK SPACE (a.k.a. byte-order mark) has width 0
\UFF01 = FULLWIDTH EXCLAMATION MARK has width 2
But, I'm also seeing oddness. E.g. the line that displays as:
<feff>！asdf
(Entered as: ^V u f e f f ^V u f f 0 1 a s d f )
On the BOM, the column is '1' (as expected)
On the Asian exclamation, though, it's 4-7, and the 'a' shows up as 7-9.
In UTF-8:
\UFEFF = \xEF \xBB \xBF (3 bytes) <feff> = display width 6 chars
\UFF01 = \xEF \xBC \x81 (3 bytes) ！ = display width 2 chars
So apparently the first number is bytes, not characters?
:h col() calls the result the 'byte index', so it makes sense, but how
would one get the character position?
--
Best,
Ben
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