Variable: whitespace-tab-regexp

whitespace-tab-regexp is a customizable variable defined in whitespace.el.gz.

Value

"\\(	+\\)"

Documentation

Specify TAB characters regexp.

If you're using mule package, there may be other characters besides "\\t" that should be considered TAB.

Here are some examples:

   "\\\\(^\\t+\\\\)" visualize only leading TABs.
   "\\\\(\\t+$\\\\)" visualize only trailing TABs.
   "\\\\(^\\t+\\\\|\\t+$\\\\)" visualize leading and/or trailing TABs.
   " \\\\(\\t+\\\\) " visualize only TABs between SPACEs.

NOTE: Enclose always by \\( and \\) the elements to highlight.
      Use exactly one pair of enclosing \\( and \\).

Used when whitespace-style includes tabs.

Source Code

;; Defined in /usr/src/emacs/lisp/whitespace.el.gz
(defcustom whitespace-tab-regexp "\\(\t+\\)"
  "Specify TAB characters regexp.

If you're using `mule' package, there may be other characters
besides \"\\t\" that should be considered TAB.

Here are some examples:

   \"\\\\(^\\t+\\\\)\"		visualize only leading TABs.
   \"\\\\(\\t+$\\\\)\"		visualize only trailing TABs.
   \"\\\\(^\\t+\\\\|\\t+$\\\\)\"	\
visualize leading and/or trailing TABs.
   \" \\\\(\\t+\\\\) \"	visualize only TABs between SPACEs.

NOTE: Enclose always by \\\\( and \\\\) the elements to highlight.
      Use exactly one pair of enclosing \\\\( and \\\\).

Used when `whitespace-style' includes `tabs'."
  :type '(regexp :tag "TAB Chars")
  :group 'whitespace)