Conversión de camelcase a_en emacs

elisp camelcasing

Question

¿Hay una función de emacs para convertir una palabra en camello en subrayado? Algo como:

longVariableName

Mx to-underscore

long_variable_name

Answer 1

Lo uso al convertir código C # a PHP.

(defun un-camelcase-word-at-point ()
  "un-camelcase the word at point, replacing uppercase chars with
the lowercase version preceded by an underscore.

The first char, if capitalized (eg, PascalCase) is just
downcased, no preceding underscore.
"
  (interactive)
  (save-excursion
    (let ((bounds (bounds-of-thing-at-point ''word)))
      (replace-regexp "//([A-Z]//)" "_//1" nil
                      (1+ (car bounds)) (cdr bounds))
      (downcase-region (car bounds) (cdr bounds)))))

Y luego en mi php-mode fn:

(local-set-key "/M-/C-C"  ''un-camelcase-word-at-point)

Answer 2

(progn (replace-regexp "//([A-Z]//)" "_//1" nil (region-beginning) (region-end))
       (downcase-region (region-beginning) (region-end)))

Answer 3

Uso lo siguiente para alternar entre camelcase y guiones bajos:

(defun toggle-camelcase-underscores ()
  "Toggle between camelcase and underscore notation for the symbol at point."
  (interactive)
  (save-excursion
    (let* ((bounds (bounds-of-thing-at-point ''symbol))
           (start (car bounds))
           (end (cdr bounds))
           (currently-using-underscores-p (progn (goto-char start)
                                                 (re-search-forward "_" end t))))
      (if currently-using-underscores-p
          (progn
            (upcase-initials-region start end)
            (replace-string "_" "" nil start end)
            (downcase-region start (1+ start)))
        (replace-regexp "//([A-Z]//)" "_//1" nil (1+ start) end)
        (downcase-region start (cdr (bounds-of-thing-at-point ''symbol)))))))

Answer 4

Use el paquete de inflexión de cadenas, disponible en MELPA, o en https://github.com/akicho8/string-inflection .

Accesos directos de teclado útiles, copiados de https://www.emacswiki.org/emacs/CamelCase :

;; Cycle between snake case, camel case, etc.
(require ''string-inflection)
(global-set-key (kbd "C-c i") ''string-inflection-cycle)
(global-set-key (kbd "C-c C") ''string-inflection-camelcase)        ;; Force to CamelCase
(global-set-key (kbd "C-c L") ''string-inflection-lower-camelcase)  ;; Force to lowerCamelCase
(global-set-key (kbd "C-c J") ''string-inflection-java-style-cycle) ;; Cycle through Java styles