Re: [ELPA] New package: marginalia

[Jens C . Jensen]

> From: Juri Linkov <juri@linkov.net>
> Date: Tue, 01 Jun 2021 23:54:45 +0300

> Maybe something like [...]
>
> Then you could use it, and prepend/append more characters
> such as: o for obsolete, ! for advised, * for modified.

I was recently fiddling with my configuration and was surprised not to find 
this function anywhere, so this would be a welcome addition in my opinion.

I too stumbled on `help--symbol-completion-table-affixation', however it seems 
to specialize on function-symbols (function/macro/command), but not on 
variables (keymap/boolean/keyword/etc.).

I ended up with something like:
#+begin_src emacs-lisp
(cond
 ((commandp sym) 'command)
 ((macrop sym) 'macro)
 ((functionp sym) 'function)
 ((booleanp sym) 'boolean)
 ((keywordp sym) 'keyword)
 ((keymapp (symbol-value sym)) 'keymap)
 ((facep sym) 'face)
 ((boundp sym) 'variable)
 ((symbolp sym) 'symbol))
#+end_src

It has worked fine for my use-case thus far, but is neither complete nor robust 
enough for documentation, as Daniel pointed out emacs-lisp is a Lisp-2 - the 
above code completely misses this point.