bug#81662: 31.1; [FR] Registers pointing to bookmarks

On Thu, Aug 20, 2026 at 7:33 AM Daniel Mendler via Bug reports for GNU
Emacs, the Swiss army knife of text editors <[email protected]> wrote:

> I propose to support bookmarks as register content. This way register
> keys can be used as quick access keys to bookmarks. Bookmarks are
> supported by many major modes. The feature can be implemented easily
> since register.el uses generic methods:
>
> (cl-defmethod register-val-describe ((bm (head bookmark)) _verbose)
>   (princ (format "Bookmark \"%s\"" (cdr bm))))
>
> (cl-defmethod register-val-jump-to ((bm (head bookmark)) _delete)
>   (bookmark-maybe-load-default-file)
>   (bookmark-jump (cdr bm)))
>
> Furthermore a command bookmark-to-register could be added. Does this
> look like a good addition or are there better alternatives? Thanks!
>
> In GNU Emacs 31.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.49,
>  cairo version 1.18.4) of 2026-08-17
> Windowing system distributor 'The X.Org Foundation', version 11.0.12101016
> System Description: Debian GNU/Linux 13 (trixie)
>
> Configured using:
>  'configure --prefix=$HOME/.local/share/emacs-install
>  --without-compress-install --with-tree-sitter=ifavailable
>  --with-native-compilation --with-dbus --without-selinux
>  --without-threads --disable-gc-mark-trace --without-gsettings
>  --without-gpm --with-cairo --with-cairo-xcb --with-xinput2
>  --with-x-toolkit=gtk3 --without-toolkit-scroll-bars 'CFLAGS=-O3
>  -mtune=native -march=native''
>
> Configured features:
> CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS HARFBUZZ JPEG LIBOTF LIBSYSTEMD
> LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
> SOUND SQLITE3 TIFF TREE_SITTER WEBP X11 XCOMPOSITE XDBE XFIXES XIM
> XINERAMA XINPUT2 XPM XRANDR XRENDER XSHAPE XSYNC GTK3 ZLIB
>

We could move the call to (bookmark-maybe-load-default-file) into
bookmark-jump as other bookmark commands do and avoid exposing
bookmark "internals" in register-val-jump-to.