Re: highlighting non-ASCII characters

[Juri Linkov]

> show-out-of-place-glyphs: alist; keys can be 'ascii, 'nonascii,
> or 'homoglyphs.  Maybe we can also allow a general regex.
>
> Values can be 'always, 'majority-paragraph, majority-line,
> 'minority-line, 'minority-paragraph, 'suspicious (with the same rules I
> proposed earlier).  A function should also be possible.  Optional second
> value is a face, defaulting to `out-of-place-glyph'.

If you are going to implement this package, I suggest you to look at
whitespace.el: how it defines where to highlight whitespace character,
how it defines rules for different classes of whitespace.

I don't propose to extend it to visualize suspicious characters
and homoglyphs in addition to whitespace, but really it has very
similar functionality.

-- 
Juri Linkov
http://www.jurta.org/emacs/