1;;; -*- mode: emacs-lisp; indent-tabs-mode: nil -*-
2
3;; emacs-23.x has a bug in cc-mode that that incorrectly deals with
4;; case labels with character constants.
5
6(require 'cl)
7(require 'cc-defs)
8(require 'cc-vars)
9(require 'cc-langs)
10
11;; Hack load-in-progress to silence the c-lang-defconst error.  For
12;; some reason, load-in-progress is nil at some times when it
13;; shouldn't be, at least on released emacs-23.1.1.
14(let ((load-in-progress t))
15
16  ;; Updated c-nonlabel-token-key based on cc-langs.el 5.267.2.22, to
17  ;; allow character constants in case labels.
18  (c-lang-defconst c-nonlabel-token-key
19    "Regexp matching things that can't occur in generic colon labels,
20neither in a statement nor in a declaration context.  The regexp is
21tested at the beginning of every sexp in a suspected label,
22i.e. before \":\".  Only used if `c-recognize-colon-labels' is set."
23    t (concat
24       ;; Don't allow string literals.
25       "\"\\|"
26       ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
27       (c-make-keywords-re t
28         (set-difference (c-lang-const c-keywords)
29                         (append (c-lang-const c-label-kwds)
30                                 (c-lang-const c-protection-kwds))
31                         :test 'string-equal)))
32    ;; Also check for open parens in C++, to catch member init lists in
33    ;; constructors.  We normally allow it so that macros with arguments
34    ;; work in labels.
35    c++ (concat "\\s\(\\|" (c-lang-const c-nonlabel-token-key)))
36  (c-lang-defvar c-nonlabel-token-key (c-lang-const c-nonlabel-token-key))
37
38  ;; Monkey-patch by way of c-mode-common-hook, as the byte-compiled
39  ;; version of c-init-language-vars will have the old value.  This
40  ;; avoids finding some way to re-evaluate the defun for
41  ;; c-init-language-vars.
42  (defun krb5-c-monkey-patch-caselabel ()
43    (setq c-nonlabel-token-key (c-lang-const c-nonlabel-token-key)))
44  (add-hook 'c-mode-common-hook 'krb5-c-monkey-patch-caselabel))
45