For C++ mode, it doesn't quite work:
foo // comment1
bar /* comment2 */
The // and /* are put in font-lock-comment-delimiter-face (which I find to
be useless clutter and makes the text less legible without helping
understand the structure), but the */ is left with just
font-lock-comment-face.
That is because comment-end is empty in C++ mode.
I see there is a variable comment-end-skip, whose doc string suggests
it ought to be useful for this (but the doc string is not entirely
clear tome). But it doesn't seem to be set up in C++ mode. Should it
be?
In SML mode I see another problem:
(* comment 1 start
(* nested comment *)
comment 1 end *)
The first (* is in f-l-c-d-f, the second isn't. That's correct.
OTOH depending on how the text is refontified, not only the second *)
but sometimes also the first *) gets the new f-l-c-d-f.
I don't see how to handle nested comments easily.
I don't understand the above. In what way does the current code change what
font-lock-comment-face looks like?
When I added font-lock-comment-delimiter-face, I copied the
definition of font-lock-comment-face into it, then changed
the definition o font-lock-comment-face.
It would be cleaner to leave font-lock-comment-face unchanged and
define font-lock-comment-text-face with the modified value.
However, I couldn't make that work. Adapting the code in
font-lock-fontify-syntactically-region in a straightforward
way resulted in incorrect results, and I don't know why.
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