On Sunday, February 8, 2015 at 1:05:02 PM UTC-6, Jacky Liu wrote:
>
>
>
> OK, I added a modeline to my text file to tell Vim the fileencoding
> specifically:
>
> /* Vim: set fileencoding=utf-8: */
> /* Vim: set tabstop=4: */
>
> ⣱man bind | less⡇
>
> +man bind | less+
>
> the 'tabstop' option was there to make sure the modeline works. the result
> seems to have no defference.
>
> For your reference: The underlying fileencoding in respect of my daily usage
> of Vim was almost always utf-8.
>
I was not talking about fileencoding, I was talking about the :scriptencoding
command, which you embed in a script to tell Vim how to read the following
bytes.
But I tried it, and I see the problem you describe anyway. So encoding is not
the issue.
I did note that putting any other text between your marker characters and your
keywords lets the highlighting work as expected. E.g. this line highlights
properly:
⣱ man bind | less ⡇
But not this one:
⣱man bind | less⡇
I think this is because of the way :syn-keyword is built to also allow multibyte
characters. I'm not sure whether it should be considered a bug or not but it
certainly is not expected. However I don't know of an elegant solution for it,
other than using "match" instead of "keyword".
:help :syn-define says:
> 1. Keyword
> It can only contain keyword characters, according to the 'iskeyword'
> option. It cannot contain other syntax items. It will only match with a
> complete word (there are no keyword characters before or after the match).
> The keyword "if" would match in "if(a=b)", but not in "ifdef x", because
> "(" is not a keyword character and "d" is.
In other words, a keyword will be matched when there are not "keyword"
characters around the match.
:help E789 (within :help :syn-keyword)
> Don't forget that a keyword can only be recognized if all the
> characters are included in the 'iskeyword' option. If one character
> isn't, the keyword will never be recognized.
> Multi-byte characters can also be used. These do not have to be in
> 'iskeyword'.
But here, we find that keyword characters for the sake of :syn-keyword include
both 'iskeyword' and also *any multibyte character*.
So in your case, the special multibyte text counts as a keyword character for
syntax purposes. Therefore the actual keywords must be separated from the
special marker text.
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