I'm working on a custom command to add strikethrough to text, using the Unicode
COMBINING LONG STROKE OVERLAY, 0x0336.
In this command, I want to apply a strikethrough to a character, only if it is
not already present.
This pattern fails because it doesn't match *anything* with regexpengine set to
2, it does not match an unadorned character immediately before a struck-through
base character, and it *does* match the last combining character in a word for
some reason:
[^\u0336]\%u0336\@!
This pattern also fails, because it matches already struck-through base
characters for some reason (although it does the same thing in both engines):
[^\u0336][^\u0336]\@=
What is the correct way to do this?
Full command (attempted):
'<,'>s;\%#=1\%V[^\u0336]\%u0336\@!;\=submatch(0)."\u0336";g
Note, how I'm also limiting to a visual selection; so I'm trying to use the :s
command for simplicity.
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