Re: Propertize C string for percent position in mode-line?

First of all: you pushed me into the right direction and so my
result is now

'(:propertize ("L%l C%c " (-3 "%o")) face modeline-blue-face display (min-width (15.0)))

which does exactly what I want. Thank you very much for that!

Eli Zaretskii wrote:

> No, "%o" is not a C string, since it is defined (by your Lisp code) in
> Lisp.

I got that from https://lists.gnu.org/r/emacs-devel/2021-11/msg01763.html
and thought you said there that we could not propertize
mode-line-percent-position for that C-string reason, but I got that wrong.
It turned out that the whole problem was that I sometimes still don't
understand when to use ' and when not. My modeline construct is

(setq-default mode-line-format
  '(
    (:eval (list
      ; all kinds of strings and functions


And these two work identically inside this construct:

(propertize "L%l C%c %o" 'face 'modeline-red-face)
'(:propertize "L%l C%c %o" face modeline-red-face)

But only the latter construct allows lists like
'(:propertize ("L%l C%c %o") face modeline-red-face)
'(:propertize ("L%l C%c " (-3 "%o")) face modeline-red-face)

While I'm still trying to understand that in detail, I'm
totally lost when looking at

'(:propertize (list -3 "%o") face modeline-red-face)
'(:propertize (-3 "%o") face modeline-red-face)

The first line shows "Bottom" in the mode-line while the second one
shows "Bot". But shouldn't (list -3 "%o") return exactly (-3 "%o")?

No matter how much I read about it, sometimes this "what is evaluated
when" is still a mystery :-)



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