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emacselisp

Check if major mode is equal one of several emacs

I found a snippet to close all dired buffers, which I want to use in sunrise commander:

(defun er/kill-all-dired-buffers()
      "Kill all dired buffers."
      (interactive)
      (save-excursion
        (let((count 0))
          (dolist(buffer (buffer-list))
            (set-buffer buffer)
            (when (equal major-mode 'sr-mode) 
              (or (equal major-mode 'dired-mode))
              (setq count (1+ count))
              (kill-buffer buffer)))
          (message "Killed %i dired buffer(s)." count ))))
(setq sr-quit-hook 'er/kill-all-dired-buffers)

Issue being, I can't make it work both for sr-mode and dired-mode together. How do I check "if major mode is sr-mode OR dired-mode"?

EDIT: Just a syntax error. Should be

(when (or (equal major-mode 'dired-mode) (equal major-mode 'sr-mode))

Have to admit it's not too intuitive.

Solution

  • The canonical way would be (when (derived-mode-p 'sr-mode 'dired-mode) ...).