;;; -*- lexical-binding: t -*-
;;
;; DWIM code helpers and examples.
;;
;; Advantages:
;;
;; - the same default interactively and from Lisp
;; - the default is the whole buffer
;; - the region is never used from Lisp
;; - the variables are always set, to default fallback if not explicitly
;; - one can have preceding, non-optional arguments

;; --------------------------------------------------------------------------

(defun use-region ()
  (if (use-region-p)
      (list (region-beginning) (region-end))
    (list nil nil)))

;; --------------------------------------------------------------------------

(defun test-dwim (&optional beg end)
  (interactive (use-region))
  (or beg (setq beg (point-min)))
  (or end (setq end (point-max)))
  (message "%d %d" beg end))

(defun test-dwim-2 (re &optional beg end)
  (interactive `(,(read-regexp "regexp: ") ,@(use-region)))
  (or beg (setq beg (point-min)))
  (or end (setq end (point-max)))
  (message "%s %d %d" re beg end))

;; --------------------------------------------------------------------------

(provide 'luki-dwim)