Subject: 24.2.50; defun*: argument lists in documentation look terrible
From: Michael Heerdegen <[email-masked]>
To: [email-masked]
Date: Wed, 14 Nov 2012 17:47:20 +0100
List-Id: <debbugs-submit.debbugs.gnu.org>

If I e.g. define something like that:

(defun* my-toggle-item (mode-or-var
                               &key
                               ((:selected enabled-spec) `(am-bound-and-true-p ',mode-or-var))
                               ((:help     help-string)   (am-make-symbol-docstring mode-or-var)))
  "Toggle item creater for modes and flags."
  ...)

the docstring then looks like that for me:

| my-toggle-item is a Lisp function.
| 
| (my-toggle-item #:MODE-OR-VAR &key ((:selected #:ENABLED-SPEC) (\`
| (am-bound-and-true-p (quote (\, mode-or-var))))) ((:help
| #:HELP-STRING) (am-make-symbol-docstring mode-or-var)))
| 
| Toggle item creater for modes and flags.

This looks terrible with all this #: and quote \, stuff.

The culprit is `cl--transform-lambda', which just uses this:

(format "%S"
        (cons 'fn
              (cl--make-usage-args orig-args)))

I think we can easily improve this, e.g. by using something like

(let (print-gensym print-level print-length (print-quoted t))
  (format "%S"
     (cons 'fn (cl--make-usage-args orig-args))))

instead.  Looks much better in *Help* and with eldoc.

Thanks,

Michael.

In GNU Emacs 24.2.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
 of 2012-11-13 on drachen
Bzr revision: [email-masked]
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
System Description:	Debian GNU/Linux testing (wheezy)

Configured using:
 `configure '--prefix=/usr/local/built/''