Re: minor mode for highlighting character classes such as non-ascii (bug 47455)

[Juri Linkov]

> In the context of bug 47455 the idea emerged that it can be useful
> to have a minor mode that highlights non-ascii characters.  I want
> to ask hear for feedback: does such a mode already exist?  Can it be
> useful to have this minor mode more general such that the highlighted
> character classes become configurable?  Are there possible use cases
> for this beyond non-ascii characters?

The GNU ELPA package 'markchars' has options to highlight
non-ASCII space chars, non-ASCII hyphen chars,
and other customizable patterns, e.g. "[[:nonascii:]]+".