Variable: imenu-case-fold-search
imenu-case-fold-search is a buffer-local variable defined in
imenu.el.gz.
Documentation
Defines whether imenu--generic-function should fold case when matching.
This variable should be set (only) by initialization code
for modes which use imenu--generic-function. If it is not set, but
font-lock-defaults is set, then font-lock's setting is used.
Source Code
;; Defined in /usr/src/emacs/lisp/imenu.el.gz
;;;
;;; Generic index gathering function.
;;;
;;;###autoload
(defvar-local imenu-case-fold-search t
"Defines whether `imenu--generic-function' should fold case when matching.
This variable should be set (only) by initialization code
for modes which use `imenu--generic-function'. If it is not set, but
`font-lock-defaults' is set, then font-lock's setting is used.")