Re: cc-mode fontification feels random

[Eli Zaretskii]

> Date: Sun, 6 Jun 2021 11:37:47 +0000
> From: Alan Mackenzie <acm@muc.de>
> Cc: emacs-devel@gnu.org
> 
> > FWIW, fontification is correct and consistent when I set 
> > font-lock-support-mode to nil, so this really does look like another 
> > case of getting unlucky with jit-lock block divisions.
> 
> Maybe an improvement might come from scanning the buffer for occurrences
> of foo after foo has been recognised as a type and entered into the CC
> Mode table.  That way, the lack of fontification on foo would be
> temporary, at least provided your Emacs is configured to fontify
> non-displayed bits of the buffer in the background (which it is by
> default).
> 
> This might need enhanced support from jit-lock, such as some sort of
> signal indicating a buffer has been completly fontified.  I haven't
> thought this through, yet.

AFAIR, the way to tell JIT font-lock that a chunk of text was already
fontified is to set the 'fontified' property on that text.