Re: MPS native subrs

[Eli Zaretskii <eliz@gnu.org>]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  emacs-devel@gnu.org
> Date: Tue, 25 Jun 2024 22:48:01 +0200
> 
> Gerd Möllmann <gerd.moellmann@gmail.com> writes:
> 
> > How command-modes, a defun, is exactly used I don't know either, sorry.
> > I understand the doc string as indicating that certain commands are only
> > applicable in certain modes, in the sense of minor- and major-mode. I
> > don't remember that from the good old days, and it doesn't seem to be
> > explained anywhere.
> 
> Seems to have appeared in
> 
> 58e0c8ee86e2c36245f1c5a1483f1c73600b4914
> Author:     Lars Ingebrigtsen <larsi@gnus.org>
> AuthorDate: Sun Feb 14 13:21:24 2021 +0100
> 
> Extend the syntax of `interactive' to list applicable modes

It's documented in the ELisp manual:


 -- Special Form: interactive &optional arg-descriptor &rest modes
 [...]
     The MODES list allows specifying which modes the command is meant
     to be used in.  See *note Command Modes:: for more details about
     the effect of specifying MODES, and when to use it.

Feature which uses it is also documented in NEWS.29:

  ** New key binding after 'M-x' or 'M-X': 'M-X'.
  Emacs allows different completion predicates to be used with 'M-x'
  (i.e., 'execute-extended-command') via the
  'read-extended-command-predicate' user option.  Emacs also has the
  'M-X' (note upper case X) command, which only displays commands
  especially relevant to the current buffer.  Emacs now allows toggling
  between these modes while the user is inputting a command by hitting
  'M-X' while in the minibuffer.