Re: How to apply a minor mode to all buffers

[Eli Zaretskii <eliz@gnu.org>]

> From: "Robert Thorpe" <rthorpe@realworldtech.com>
> Date: 22 Jan 2007 03:48:30 -0800
> 
> The after-change-mode-hook is still quite tedious.
> Let's say you want to enable hide-show mode in every mode in which it's
> useful.  Generally it's only useful in programming language modes and a
> few text modes, currently the only way to accurately do this is to
> enable it individually in many hooks.

Here's a simple solution to a similar problem I have in my .emacs for
quite some time:

    ;;; Turn on trailing whitespace highlighting in modes where
    ;;; it makes sense.
    (let* ((twh-modes '("texinfo-mode" "makefile-mode" "c-mode-common"
			"emacs-lisp-mode" "outline-mode" "sh-mode"
			"shell-script-mode" 
			))
	   (elt (car twh-modes)))
      (while elt
	(add-hook (intern (concat elt "-hook"))
		  (function (lambda ()
			      (setq show-trailing-whitespace t))))
	(setq twh-modes (cdr twh-modes)
	      elt (car twh-modes))))

If I ever need to do that in an additional mode, all I have to do is
add another mode name to the list at the beginning of this snippet:
hardly a tedious job.