Re: Foreground color opacity

[Eli Zaretskii]

> From: Filippo Argiolas <filippo.argiolas@gmail.com>
> Date: Mon, 11 Sep 2023 18:25:50 +0200
> Cc: emacs-devel@gnu.org
> 
> Didn't encounter any issue so far with c and c-ts modes but something
> like you described could definitely happen if someone relies on font
> face to detect symbol type. I'd say that's kind of an unsafe aspect to
> rely on. Do you have any example in mind of code doing that so I could
> run some tests?

One such example is flyspell.el's flyspell-prog-mode.  See
flyspell-prog-text-faces there.