Re: highlighting non-ASCII characters

[Ted Zlatanov]

On Wed, 24 Mar 2010 11:28:16 +0200 Juri Linkov <address@hidden> wrote: 

JL> There is another case where non-highlighted out of place chars
JL> cause problems: http://thread.gmane.org/gmane.emacs.devel/121494

JL> When I look at NBSP chars in cc-engine.el, I see them as `EQUALS SIGN'
JL> (actually `C-u C-x =' says they are `BOX DRAWINGS DOUBLE HORIZONTAL').
JL> That's because of the wrong coding used (there is no coding: tag,
JL> so they are displayed with my default koi8).  When Miles reported this
JL> problem with NBSP chars in cc-engine.el, I found nothing suspicious
JL> because equals-sign chars don't look out of place.  And only when
JL> I grepped for non-ASCII chars, I discovered them.

JL> What should be a heuristics to highlight these problematic chars
JL> that look like normal chars?

If you look at my latest proposal for showing out-of-place characters,
'(homoglyphs suspicious) will probably work for this case as well.

Ted