 
 A string containing the name or the full path of the executable."
   :group 'clang-format
-  :type 'string
+  :type '(file :must-match t)
   :risky t)
 
 (defcustom clang-format-style "file"

;;; clang-format.el --- Format code using clang-format

;; Keywords: tools, c
;; Package-Requires: ((cl-lib "0.3"))

;;   M-x package-install clang-format
;;
;; when ("melpa" . "http://melpa.org/packages/") is included in
;; `package-archives'.  Alternatively, ensure the directory of this
;; file is in your `load-path' and add
;;
;;   (require 'clang-format)
