Emacs isearch Whitespace Regex Setup
In emacs isearch
(Alt+x isearch-forward
)
[see Emacs: Search Text in Current File]
, you can type a space and it will also search for hyphen
-
and
low line
_ and tab and newline.
This this very convenient.
Put this in your Emacs Init File:
;; for isearch-forward, make these equivalent: space newline tab hyphen underscore (setq search-whitespace-regexp "[-_ \t\n]+")
But sometimes you want literal. This command makes it easy to toggle.
(defun xah-toggle-search-whitespace () "Set `search-whitespace-regexp' to nil or includes hyphen lowline tab newline. Explanation: When in isearch (M-x `isearch-forward'), space key can also stand for other chars such as hyphen lowline tab newline. It depend on a regex. It's convenient. But sometimes you want literal. This command makes it easy to toggle. Emacs Isearch Space Toggle URL `http://xahlee.info/emacs/emacs/emacs_isearch_space.html' Version 2019-02-22 2021-11-13" (interactive) (if (string-equal search-whitespace-regexp nil) (progn (setq search-whitespace-regexp "[-_ \t\n]+") (message "Space set to hyphen lowline tab newline space")) (progn (setq search-whitespace-regexp nil) (message "Space set to literal."))))