diff options
Diffstat (limited to 'lisp')
| -rw-r--r-- | lisp/thingatpt.el | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/lisp/thingatpt.el b/lisp/thingatpt.el index 13f761e69e7..d3150403927 100644 --- a/lisp/thingatpt.el +++ b/lisp/thingatpt.el @@ -42,6 +42,9 @@ ;; beginning-op Function to call to skip to the beginning of a "thing". ;; end-op Function to call to skip to the end of a "thing". ;; +;; For simple things, defined as sequences of specific kinds of characters, +;; use macro define-thing-chars. +;; ;; Reliance on existing operators means that many `things' can be accessed ;; without further code: eg. ;; (thing-at-point 'line) @@ -237,21 +240,28 @@ The bounds of THING are determined by `bounds-of-thing-at-point'." (put 'defun 'end-op 'end-of-defun) (put 'defun 'forward-op 'end-of-defun) +;; Things defined by sets of characters + +(defmacro define-thing-chars (thing chars) + "Define THING as a sequence of CHARS. +E.g.: +\(define-thing-chars twitter-screen-name \"[:alnum:]_\")" + `(progn + (put ',thing 'end-op + (lambda () + (re-search-forward (concat "\\=[" ,chars "]*") nil t))) + (put ',thing 'beginning-op + (lambda () + (if (re-search-backward (concat "[^" ,chars "]") nil t) + (forward-char) + (goto-char (point-min))))))) + ;; Filenames (defvar thing-at-point-file-name-chars "-~/[:alnum:]_.${}#%,:" "Characters allowable in filenames.") -(put 'filename 'end-op - (lambda () - (re-search-forward (concat "\\=[" thing-at-point-file-name-chars "]*") - nil t))) -(put 'filename 'beginning-op - (lambda () - (if (re-search-backward (concat "[^" thing-at-point-file-name-chars "]") - nil t) - (forward-char) - (goto-char (point-min))))) +(define-thing-chars filename thing-at-point-file-name-chars) ;; URIs |