Re: Split `simple.el'?

[Eli Zaretskii]

> From: Andreas Schwab <address@hidden>
> Date: Fri, 06 Apr 2018 08:22:51 +0200
> Cc: address@hidden
> 
> On Apr 05 2018, Stefan Monnier <address@hidden> wrote:
> 
> > This could be considered a bug: maybe `current-column` shouldn't need to
> > lookup any font information (after all, it doesn't actually give
> > pixel-precise information).
> 
> But it needs to know whether the character is glyphless, so that it can
> use glyphless-char-display.

Indeed.  More generally, it needs to check character compositions, and
that requires involving the font back-end, which needs to look up a
font for each character from the beginning of the line to point.