quickly locate C/C++/ObjC function in current buffer

gistfile1.el

;; for Xcode pragma mark, and C/C++ functions
(require 'anything)
(require 'anything-config)

(defvar anything-c-source-objc-headline
  '((name . "Objective-C Headline")
    (headline  "^[-+@]\\|^#pragma mark")
))

(defvar anything-c-source-c-headline
  '((name . "C Headline")
    (headline  "^[A-Za-z_]+?[ A-Za-z_0-9\*]+[A-Za-z_0-9]+?(")
))

(defvar anything-c-source-cpp-headline
  '((name . "Cpp Headline")
    (headline  "^[A-Za-z_]+?[ A-Za-z_:~0-9\*]+[A-Za-z_0-9]+?(")
))

(defun c-base-mode-headline ()
  (interactive)
  ;; Set to 500 so it is displayed even if all methods are not narrowed down.
  (let ((anything-candidate-number-limit 500))
    (cond
     ((eq major-mode 'objc-mode) 
      (anything-other-buffer '(anything-c-source-objc-headline)
                             "*ObjC Headline*"))
     ((eq major-mode 'c++-mode)
      (anything-other-buffer '(anything-c-source-cpp-headline)
                             "*Cpp Headline*"))
     ((eq major-mode 'c-mode)
      (anything-other-buffer '(anything-c-source-c-headline)
                             "*C Headline*"))
     )))

(add-hook
 'c-mode-common-hook
 (lambda ()
   (define-key c-mode-base-map (kbd "M-i") 'c-base-mode-headline)
))