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;;; cc-fonts.el --- font lock support for CC Mode

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;; Copyright (C) 2002-2019 Free Software Foundation, Inc.
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;; Authors:    2003- Alan Mackenzie
;;             2002- Martin Stjernholm
;; Maintainer: bug-cc-mode@gnu.org
;; Created:    07-Jan-2002
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;; Keywords:   c languages
;; Package:    cc-mode
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;; This file is part of GNU Emacs.

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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:

;; Some comments on the use of faces:
;;
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;; o  `c-label-face-name' is either `font-lock-constant-face' (in
;;    Emacs), or `font-lock-reference-face'.
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;;
;; o  `c-constant-face-name', `c-reference-face-name' and
;;    `c-doc-markup-face-name' are essentially set up like
;;    `c-label-face-name'.
;;
;; o  `c-preprocessor-face-name' is `font-lock-preprocessor-face' in
;;    XEmacs and - in lack of a closer equivalent -
;;    `font-lock-builtin-face' or `font-lock-reference-face' in Emacs.
;;
;; o  `c-doc-face-name' is `font-lock-doc-string-face' in XEmacs,
;;    `font-lock-doc-face' in Emacs 21 and later, or
;;    `font-lock-comment-face' in older Emacs (that since source
;;    documentation are actually comments in these languages, as opposed
;;    to elisp).
;;
;; TBD: We should probably provide real faces for the above uses and
;; instead initialize them from the standard faces.

;;; Code:

;; The faces that already have been put onto the text is tested in
;; various places to direct further fontifications.  For this to work,
;; the following assumptions regarding the faces must hold (apart from
;; the dependencies on the font locking order):
;;
;; o  `font-lock-comment-face' and the face in `c-doc-face-name' is
;;    not used in anything but comments.
;; o  If any face (e.g. `c-doc-markup-face-name') but those above is
;;    used in comments, it doesn't replace them.
;; o  `font-lock-string-face' is not used in anything but string
;;    literals (single or double quoted).
;; o  `font-lock-keyword-face' and the face in `c-label-face-name' are
;;    never overlaid with other faces.

(eval-when-compile
  (let ((load-path
	 (if (and (boundp 'byte-compile-dest-file)
		  (stringp byte-compile-dest-file))
	     (cons (file-name-directory byte-compile-dest-file) load-path)
	   load-path)))
    (load "cc-bytecomp" nil t)))

(cc-require 'cc-defs)
(cc-require-when-compile 'cc-langs)
(cc-require 'cc-vars)
(cc-require 'cc-engine)
(cc-require-when-compile 'cc-awk) ; Change from cc-require, 2003/6/18 to
;; prevent cc-awk being loaded when it's not needed.  There is now a (require
;; 'cc-awk) in (defun awk-mode ..).

;; Avoid repeated loading through the eval-after-load directive in
;; cc-mode.el.
(provide 'cc-fonts)

(cc-external-require 'font-lock)

(cc-bytecomp-defvar parse-sexp-lookup-properties) ; Emacs only.

;; Need to declare these local symbols during compilation since
;; they're referenced from lambdas in `byte-compile' calls that are
;; executed at compile time.  They don't need to have the proper
;; definitions, though, since the generated functions aren't called
;; during compilation.
(cc-bytecomp-defvar c-preprocessor-face-name)
(cc-bytecomp-defvar c-reference-face-name)
(cc-bytecomp-defun c-fontify-recorded-types-and-refs)
(cc-bytecomp-defun c-font-lock-declarators)
(cc-bytecomp-defun c-font-lock-objc-method)
(cc-bytecomp-defun c-font-lock-invalid-string)


;; Note that font-lock in XEmacs doesn't expand face names as
;; variables, so we have to use the (eval . FORM) in the font lock
;; matchers wherever we use these alias variables.

(defconst c-preprocessor-face-name
  (cond ((c-face-name-p 'font-lock-preprocessor-face)
	 ;; XEmacs has a font-lock-preprocessor-face.
	 'font-lock-preprocessor-face)
	((c-face-name-p 'font-lock-builtin-face)
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	 ;; In Emacs font-lock-builtin-face has traditionally been
	 ;; used for preprocessor directives.
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	 'font-lock-builtin-face)
	(t
	 'font-lock-reference-face)))

(cc-bytecomp-defvar font-lock-constant-face)

(defconst c-label-face-name
  (cond ((c-face-name-p 'font-lock-label-face)
	 ;; If it happens to occur in the future.  (Well, the more
	 ;; pragmatic reason is to get unique faces for the test
	 ;; suite.)
	 'font-lock-label-face)
	((and (c-face-name-p 'font-lock-constant-face)
	      (eq font-lock-constant-face 'font-lock-constant-face))
	 ;; Test both if font-lock-constant-face exists and that it's
	 ;; not an alias for something else.  This is important since
	 ;; we compare already set faces in various places.
	 'font-lock-constant-face)
	(t
	 'font-lock-reference-face)))

(defconst c-constant-face-name
  (if (and (c-face-name-p 'font-lock-constant-face)
	   (eq font-lock-constant-face 'font-lock-constant-face))
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      ;; This doesn't exist in some earlier versions of XEmacs 21.
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      'font-lock-constant-face
    c-label-face-name))

(defconst c-reference-face-name
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  (with-no-warnings
   (if (and (c-face-name-p 'font-lock-reference-face)
	    (eq font-lock-reference-face 'font-lock-reference-face))
       ;; This is considered obsolete in Emacs, but it still maps well
       ;; to this use.  (Another reason to do this is to get unique
       ;; faces for the test suite.)
       'font-lock-reference-face
     c-label-face-name)))
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;; This should not mapped to a face that also is used to fontify things
;; that aren't comments or string literals.
(defconst c-doc-face-name
  (cond ((c-face-name-p 'font-lock-doc-string-face)
	 ;; XEmacs.
	 'font-lock-doc-string-face)
	((c-face-name-p 'font-lock-doc-face)
	 ;; Emacs 21 and later.
	 'font-lock-doc-face)
	(t
	 'font-lock-comment-face)))

(defconst c-doc-markup-face-name
  (if (c-face-name-p 'font-lock-doc-markup-face)
	 ;; If it happens to occur in the future.  (Well, the more
	 ;; pragmatic reason is to get unique faces for the test
	 ;; suite.)
	 'font-lock-doc-markup-face
    c-label-face-name))

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(defconst c-negation-char-face-name
  (if (c-face-name-p 'font-lock-negation-char-face)
      ;; Emacs 22 has a special face for negation chars.
      'font-lock-negation-char-face))
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(cc-bytecomp-defun face-inverse-video-p) ; Only in Emacs.

(defun c-make-inverse-face (oldface newface)
  ;; Emacs and XEmacs have completely different face manipulation
  ;; routines. :P
  (copy-face oldface newface)
  (cond ((fboundp 'face-inverse-video-p)
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	 ;; Emacs.  This only looks at the inverse flag in the current
	 ;; frame.  Other display configurations might be different,
	 ;; but it can only show if the same Emacs has frames on
	 ;; e.g. a color and a monochrome display simultaneously.
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	 (unless (face-inverse-video-p oldface)
	   (invert-face newface)))
	((fboundp 'face-property-instance)
	 ;; XEmacs.  Same pitfall here.
	 (unless (face-property-instance oldface 'reverse)
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	   (invert-face newface)))))
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(defvar c-annotation-face 'c-annotation-face)

(defface c-annotation-face
  '((default :inherit font-lock-constant-face))
  "Face for highlighting annotations in Java mode and similar modes."
  :version "24.1"
  :group 'c)
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(eval-and-compile
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  ;; We need the following definitions during compilation since they're
  ;; used when the `c-lang-defconst' initializers are evaluated.  Define
  ;; them at runtime too for the sake of derived modes.

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  ;; This indicates the "font locking context", and is set just before
  ;; fontification is done.  If non-nil, it says, e.g., point starts
  ;; from within a #if preprocessor construct.
  (defvar c-font-lock-context nil)
  (make-variable-buffer-local 'c-font-lock-context)

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  (defmacro c-put-font-lock-face (from to face)
    ;; Put a face on a region (overriding any existing face) in the way
    ;; font-lock would do it.  In XEmacs that means putting an
    ;; additional font-lock property, or else the font-lock package
    ;; won't recognize it as fontified and might override it
    ;; incorrectly.
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    ;;
    ;; This function does a hidden buffer change.
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    (if (fboundp 'font-lock-set-face)
	;; Note: This function has no docstring in XEmacs so it might be
	;; considered internal.
	`(font-lock-set-face ,from ,to ,face)
      `(put-text-property ,from ,to 'face ,face)))

  (defmacro c-remove-font-lock-face (from to)
    ;; This is the inverse of `c-put-font-lock-face'.
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    ;;
    ;; This function does a hidden buffer change.
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    (if (fboundp 'font-lock-remove-face)
	`(font-lock-remove-face ,from ,to)
      `(remove-text-properties ,from ,to '(face nil))))

  (defmacro c-put-font-lock-string-face (from to)
    ;; Put `font-lock-string-face' on a string.  The surrounding
    ;; quotes are included in Emacs but not in XEmacs.  The passed
    ;; region should include them.
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    ;;
    ;; This function does a hidden buffer change.
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    (if (featurep 'xemacs)
	`(c-put-font-lock-face (1+ ,from) (1- ,to) 'font-lock-string-face)
      `(c-put-font-lock-face ,from ,to 'font-lock-string-face)))

  (defmacro c-fontify-types-and-refs (varlist &rest body)
    ;; Like `let', but additionally activates `c-record-type-identifiers'
    ;; and `c-record-ref-identifiers', and fontifies the recorded ranges
    ;; accordingly on exit.
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    ;;
    ;; This function does hidden buffer changes.
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    `(let ((c-record-type-identifiers t)
	   c-record-ref-identifiers
	   ,@varlist)
       (prog1 (progn ,@body)
	 (c-fontify-recorded-types-and-refs))))
  (put 'c-fontify-types-and-refs 'lisp-indent-function 1)

  (defun c-skip-comments-and-strings (limit)
    ;; If the point is within a region fontified as a comment or
    ;; string literal skip to the end of it or to LIMIT, whichever
    ;; comes first, and return t.  Otherwise return nil.  The match
    ;; data is not clobbered.
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    ;;
    ;; This function might do hidden buffer changes.
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    (when (c-got-face-at (point) c-literal-faces)
      (while (progn
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	       (goto-char (c-next-single-property-change
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			   (point) 'face nil limit))
	       (and (< (point) limit)
		    (c-got-face-at (point) c-literal-faces))))
      t))

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  (defun c-make-syntactic-matcher (regexp)
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    ;; Returns a byte compiled function suitable for use in place of a
    ;; regexp string in a `font-lock-keywords' matcher, except that
    ;; only matches outside comments and string literals count.
    ;;
    ;; This function does not do any hidden buffer changes, but the
    ;; generated functions will.  (They are however used in places
    ;; covered by the font-lock context.)
    (byte-compile
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     `(lambda (limit)
	(let (res)
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	  (while (and (setq res (re-search-forward ,regexp limit t))
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		      (progn
			(goto-char (match-beginning 0))
			(or (c-skip-comments-and-strings limit)
			    (progn
			      (goto-char (match-end 0))
			      nil)))))
	  res))))

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  (defun c-make-font-lock-search-form (regexp highlights &optional check-point)
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    ;; Return a lisp form which will fontify every occurrence of REGEXP
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    ;; (a regular expression, NOT a function) between POINT and `limit'
    ;; with HIGHLIGHTS, a list of highlighters as specified on page
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    ;; "Search-based Fontification" in the elisp manual.  If CHECK-POINT
    ;; is non-nil, we will check (< (point) limit) in the main loop.
    `(while
	 ,(if check-point
	      `(and (< (point) limit)
		    (re-search-forward ,regexp limit t))
	    `(re-search-forward ,regexp limit t))
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       (unless (progn
		 (goto-char (match-beginning 0))
		 (c-skip-comments-and-strings limit))
	 (goto-char (match-end 0))
	 ,@(mapcar
	    (lambda (highlight)
	      (if (integerp (car highlight))
		  ;; e.g. highlight is (1 font-lock-type-face t)
		  (progn
		    (unless (eq (nth 2 highlight) t)
		      (error
		       "The override flag must currently be t in %s"
		       highlight))
		    (when (nth 3 highlight)
		      (error
		       "The laxmatch flag may currently not be set in %s"
		       highlight))
		    `(save-match-data
		       (c-put-font-lock-face
			(match-beginning ,(car highlight))
			(match-end ,(car highlight))
			,(elt highlight 1))))
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		;; highlight is an "ANCHORED HIGHLIGHTER" of the form
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		;; (ANCHORED-MATCHER PRE-FORM POST-FORM SUBEXP-HIGHLIGHTERS...)
		(when (nth 3 highlight)
		  (error "Match highlights currently not supported in %s"
			 highlight))
		`(progn
		   ,(nth 1 highlight)
		   (save-match-data ,(car highlight))
		   ,(nth 2 highlight))))
	    highlights))))

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  (defun c-make-font-lock-search-function (regexp &rest highlights)
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    ;; This function makes a byte compiled function that works much like
    ;; a matcher element in `font-lock-keywords'.  It cuts out a little
    ;; bit of the overhead compared to a real matcher.  The main reason
    ;; is however to pass the real search limit to the anchored
    ;; matcher(s), since most (if not all) font-lock implementations
    ;; arbitrarily limit anchored matchers to the same line, and also
    ;; to insulate against various other irritating differences between
    ;; the different (X)Emacs font-lock packages.
    ;;
    ;; REGEXP is the matcher, which must be a regexp.  Only matches
    ;; where the beginning is outside any comment or string literal are
    ;; significant.
    ;;
    ;; HIGHLIGHTS is a list of highlight specs, just like in
    ;; `font-lock-keywords', with these limitations: The face is always
    ;; overridden (no big disadvantage, since hits in comments etc are
    ;; filtered anyway), there is no "laxmatch", and an anchored matcher
    ;; is always a form which must do all the fontification directly.
    ;; `limit' is a variable bound to the real limit in the context of
    ;; the anchored matcher forms.
    ;;
    ;; This function does not do any hidden buffer changes, but the
    ;; generated functions will.  (They are however used in places
    ;; covered by the font-lock context.)

    ;; Note: Replace `byte-compile' with `eval' to debug the generated
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    ;; lambda more easily.
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    (byte-compile
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     `(lambda (limit)
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	(let ( ;; The font-lock package in Emacs is known to clobber
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	      ;; `parse-sexp-lookup-properties' (when it exists).
	      (parse-sexp-lookup-properties
	       (cc-eval-when-compile
		 (boundp 'parse-sexp-lookup-properties))))
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	  ,(c-make-font-lock-search-form regexp highlights))
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	nil)))

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  (defun c-make-font-lock-BO-decl-search-function (regexp &rest highlights)
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    ;; This function makes a byte compiled function that first moves back
    ;; to the beginning of the current declaration (if any), then searches
    ;; forward for matcher elements (as in `font-lock-keywords') and
    ;; fontifies them.
    ;;
    ;; The motivation for moving back to the declaration start is to
    ;; establish a context for the current text when, e.g., a character
    ;; is typed on a C++ inheritance continuation line, or a jit-lock
    ;; chunk starts there.
    ;;
    ;; The new function works much like a matcher element in
    ;; `font-lock-keywords'.  It cuts out a little bit of the overhead
    ;; compared to a real matcher.  The main reason is however to pass the
    ;; real search limit to the anchored matcher(s), since most (if not
    ;; all) font-lock implementations arbitrarily limit anchored matchers
    ;; to the same line, and also to insulate against various other
    ;; irritating differences between the different (X)Emacs font-lock
    ;; packages.
    ;;
    ;; REGEXP is the matcher, which must be a regexp.  Only matches
    ;; where the beginning is outside any comment or string literal are
    ;; significant.
    ;;
    ;; HIGHLIGHTS is a list of highlight specs, just like in
    ;; `font-lock-keywords', with these limitations: The face is always
    ;; overridden (no big disadvantage, since hits in comments etc are
    ;; filtered anyway), there is no "laxmatch", and an anchored matcher
    ;; is always a form which must do all the fontification directly.
    ;; `limit' is a variable bound to the real limit in the context of
    ;; the anchored matcher forms.
    ;;
    ;; This function does not do any hidden buffer changes, but the
    ;; generated functions will.  (They are however used in places
    ;; covered by the font-lock context.)

    ;; Note: Replace `byte-compile' with `eval' to debug the generated
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    ;; lambda more easily.
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    (byte-compile
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     `(lambda (limit)
	(let ( ;; The font-lock package in Emacs is known to clobber
	      ;; `parse-sexp-lookup-properties' (when it exists).
	      (parse-sexp-lookup-properties
	       (cc-eval-when-compile
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		 (boundp 'parse-sexp-lookup-properties)))
	      (BOD-limit
	       (c-determine-limit 1000)))
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	  (goto-char
	   (let ((here (point)))
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	     (if (eq (car (c-beginning-of-decl-1 BOD-limit)) 'same)
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		 (point)
	       here)))
	  ,(c-make-font-lock-search-form regexp highlights))
	nil)))

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  (defun c-make-font-lock-context-search-function (normal &rest state-stanzas)
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    ;; This function makes a byte compiled function that works much like
    ;; a matcher element in `font-lock-keywords', with the following
    ;; enhancement: the generated function will test for particular "font
    ;; lock contexts" at the start of the region, i.e. is this point in
    ;; the middle of some particular construct?  if so the generated
    ;; function will first fontify the tail of the construct, before
    ;; going into the main loop and fontify full constructs up to limit.
    ;;
    ;; The generated function takes one parameter called `limit', and
    ;; will fontify the region between POINT and LIMIT.
    ;;
    ;; NORMAL is a list of the form (REGEXP HIGHLIGHTS .....), and is
    ;; used to fontify the "regular" bit of the region.
    ;; STATE-STANZAS is list of elements of the form (STATE LIM REGEXP
    ;; HIGHLIGHTS), each element coding one possible font lock context.

    ;; o - REGEXP is a font-lock regular expression (NOT a function),
    ;; o - HIGHLIGHTS is a list of zero or more highlighters as defined
    ;;   on page "Search-based Fontification" in the elisp manual.  As
    ;;   yet (2009-06), they must have OVERRIDE set, and may not have
    ;;   LAXMATCH set.
    ;;
    ;; o - STATE is the "font lock context" (e.g. in-cpp-expr) and is
    ;;   not quoted.
    ;; o - LIM is a lisp form whose evaluation will yield the limit
    ;;   position in the buffer for fontification by this stanza.
    ;;
    ;; This function does not do any hidden buffer changes, but the
    ;; generated functions will.  (They are however used in places
    ;; covered by the font-lock context.)
    ;;
    ;; Note: Replace `byte-compile' with `eval' to debug the generated
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    ;; lambda more easily.
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    (byte-compile
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     `(lambda (limit)
	(let ( ;; The font-lock package in Emacs is known to clobber
	      ;; `parse-sexp-lookup-properties' (when it exists).
	      (parse-sexp-lookup-properties
	       (cc-eval-when-compile
		 (boundp 'parse-sexp-lookup-properties))))
	  ,@(mapcar
	     (lambda (stanza)
	       (let ((state (car stanza))
		     (lim (nth 1 stanza))
		     (regexp (nth 2 stanza))
		     (highlights (cdr (cddr stanza))))
		 `(if (eq c-font-lock-context ',state)
		      (let ((limit ,lim))
			,(c-make-font-lock-search-form
			  regexp highlights)))))
	     state-stanzas)
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	  ;; In the next form, check that point hasn't been moved beyond
	  ;; `limit' in any of the above stanzas.
	  ,(c-make-font-lock-search-form (car normal) (cdr normal) t)
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	  nil))))

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;  (eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
;    '(progn
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(def-edebug-spec c-put-font-lock-face t)
(def-edebug-spec c-remove-font-lock-face t)
(def-edebug-spec c-put-font-lock-string-face t)
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  (def-edebug-spec c-fontify-types-and-refs let*)
  (def-edebug-spec c-make-syntactic-matcher t)
  ;; If there are literal quoted or backquoted highlight specs in
  ;; the call to `c-make-font-lock-search-function' then let's
  ;; instrument the forms in them.
  (def-edebug-spec c-make-font-lock-search-function
    (form &rest &or ("quote" (&rest form)) ("`" (&rest form)) form)));))
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(defun c-fontify-recorded-types-and-refs ()
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  ;; Convert the ranges recorded on `c-record-type-identifiers' and
  ;; `c-record-ref-identifiers' to fontification.
  ;;
  ;; This function does hidden buffer changes.
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  (let (elem)
    (while (consp c-record-type-identifiers)
      (setq elem (car c-record-type-identifiers)
	    c-record-type-identifiers (cdr c-record-type-identifiers))
      (c-put-font-lock-face (car elem) (cdr elem)
			    'font-lock-type-face))
    (while c-record-ref-identifiers
      (setq elem (car c-record-ref-identifiers)
	    c-record-ref-identifiers (cdr c-record-ref-identifiers))
      ;; Note that the reference face is a variable that is
      ;; dereferenced, since it's an alias in Emacs.
      (c-put-font-lock-face (car elem) (cdr elem)
			    c-reference-face-name))))

(c-lang-defconst c-cpp-matchers
  "Font lock matchers for preprocessor directives and purely lexical
stuff.  Used on level 1 and higher."

  ;; Note: `c-font-lock-declarations' assumes that no matcher here
  ;; sets `font-lock-type-face' in languages where
  ;; `c-recognize-<>-arglists' is set.

  t `(,@(when (c-lang-const c-opt-cpp-prefix)
	  (let* ((noncontinued-line-end "\\(\\=\\|\\(\\=\\|[^\\]\\)[\n\r]\\)")
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		 (ncle-depth (regexp-opt-depth noncontinued-line-end))
		 (sws-depth (c-lang-const c-syntactic-ws-depth))
		 (nsws-depth (c-lang-const c-nonempty-syntactic-ws-depth)))

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	    `(;; The stuff after #error and #warning is a message, so
	      ;; fontify it as a string.
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	      ,@(when (c-lang-const c-cpp-message-directives)
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		  (let* ((re (c-make-keywords-re 'appendable ; nil
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			       (c-lang-const c-cpp-message-directives)))
			 (re-depth (regexp-opt-depth re)))
		    `((,(concat noncontinued-line-end
				(c-lang-const c-opt-cpp-prefix)
				re
				"\\s +\\(.*\\)$")
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		       ,(+ ncle-depth re-depth 1) font-lock-string-face t))))
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	      ;; Fontify filenames in #include <...> as strings.
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	      ,@(when (c-lang-const c-cpp-include-directives)
		  (let* ((re (c-make-keywords-re nil
			       (c-lang-const c-cpp-include-directives)))
			 (re-depth (regexp-opt-depth re)))
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		    ;; We used to use a font-lock "anchored matcher" here for
		    ;; the paren syntax.  This failed when the ">" was at EOL,
		    ;; since `font-lock-fontify-anchored-keywords' terminated
		    ;; its loop at EOL without executing our lambda form at
		    ;; all.
		    `((,(c-make-font-lock-search-function
			 (concat noncontinued-line-end
				 (c-lang-const c-opt-cpp-prefix)
				 re
				 (c-lang-const c-syntactic-ws)
				 "\\(<[^>\n\r]*>?\\)")
			 `(,(+ ncle-depth re-depth sws-depth 1)
			   font-lock-string-face t)
			 `((let ((beg (match-beginning
				       ,(+ ncle-depth re-depth sws-depth 1)))
				 (end (1- (match-end ,(+ ncle-depth re-depth
							 sws-depth 1)))))
			     (if (eq (char-after end) ?>)
				 (progn
				   (c-mark-<-as-paren beg)
				   (c-mark->-as-paren end))
			       (c-unmark-<->-as-paren beg)))
			   nil))))))
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	      ;; #define.
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	      ,@(when (c-lang-const c-opt-cpp-macro-define)
		  `((,(c-make-font-lock-search-function
		       (concat
			noncontinued-line-end
			(c-lang-const c-opt-cpp-prefix)
			(c-lang-const c-opt-cpp-macro-define)
			(c-lang-const c-nonempty-syntactic-ws)
			"\\(" (c-lang-const ; 1 + ncle + nsws
			       c-symbol-key) "\\)"
			(concat "\\("	; 2 + ncle + nsws + c-sym-key
				;; Macro with arguments - a "function".
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				"\\((\\)" ; 3 + ncle + nsws + c-sym-key
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				"\\|"
				;; Macro without arguments - a "variable".
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				"\\([^(]\\|$\\)"
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				"\\)"))
		       `((if (match-beginning
			      ,(+ 3 ncle-depth nsws-depth
				  (c-lang-const c-symbol-key-depth)))

			     ;; "Function".  Fontify the name and the arguments.
			     (save-restriction
			       (c-put-font-lock-face
				(match-beginning ,(+ 1 ncle-depth nsws-depth))
				(match-end ,(+ 1 ncle-depth nsws-depth))
				'font-lock-function-name-face)
			       (goto-char
				(match-end
				 ,(+ 3 ncle-depth nsws-depth
				     (c-lang-const c-symbol-key-depth))))

			       (narrow-to-region (point-min) limit)
			       (while (and
				       (progn
					 (c-forward-syntactic-ws)
					 (looking-at c-symbol-key))
				       (progn
					 (c-put-font-lock-face
					  (match-beginning 0) (match-end 0)
					  'font-lock-variable-name-face)
					 (goto-char (match-end 0))
					 (c-forward-syntactic-ws)
					 (eq (char-after) ?,)))
				 (forward-char)))

			   ;; "Variable".
			   (c-put-font-lock-face
			    (match-beginning ,(+ 1 ncle-depth nsws-depth))
			    (match-end ,(+ 1 ncle-depth nsws-depth))
			    'font-lock-variable-name-face)))))))
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	      ;; Fontify cpp function names in preprocessor
	      ;; expressions in #if and #elif.
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	      ,@(when (and (c-lang-const c-cpp-expr-directives)
			   (c-lang-const c-cpp-expr-functions))
		  (let ((ced-re (c-make-keywords-re t
				  (c-lang-const c-cpp-expr-directives)))
			(cef-re (c-make-keywords-re t
				  (c-lang-const c-cpp-expr-functions))))
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		    `((,(c-make-font-lock-context-search-function
			 `(,(concat noncontinued-line-end
				    (c-lang-const c-opt-cpp-prefix)
				    ced-re ; 1 + ncle-depth
				    ;; Match the whole logical line to look
				    ;; for the functions in.
				    "\\(\\\\\\(.\\|[\n\r]\\)\\|[^\n\r]\\)*")
			   ((let ((limit (match-end 0)))
			      (while (re-search-forward ,cef-re limit 'move)
				(c-put-font-lock-face (match-beginning 1)
						      (match-end 1)
						      c-preprocessor-face-name)))
			    (goto-char (match-end ,(1+ ncle-depth)))))
			 `(in-cpp-expr
			   (save-excursion (c-end-of-macro) (point))
			   ,cef-re
			   (1 c-preprocessor-face-name t)))))))
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	      ;; Fontify the directive names.
	      (,(c-make-font-lock-search-function
		 (concat noncontinued-line-end
			 "\\("
			 (c-lang-const c-opt-cpp-prefix)
			 "[" (c-lang-const c-symbol-chars) "]+"
			 "\\)")
		 `(,(1+ ncle-depth) c-preprocessor-face-name t)))
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	      (eval . (list ,(c-make-syntactic-matcher
			      (concat noncontinued-line-end
				      (c-lang-const c-opt-cpp-prefix)
				      "if\\(n\\)def\\>"))
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			    ,(+ ncle-depth 1)
			    c-negation-char-face-name
			    'append))
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	      )))

      ,@(when (c-major-mode-is 'pike-mode)
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	  ;; Recognize hashbangs in Pike.
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	  '((eval . (list "\\`#![^\n\r]*"
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			  0 c-preprocessor-face-name))))

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      ;; Make hard spaces visible through an inverted `font-lock-warning-face'.
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      (eval . (list
	       "\240"
	       0 (progn
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		   (unless (c-face-name-p 'c-nonbreakable-space-face)
		     (c-make-inverse-face 'font-lock-warning-face
					  'c-nonbreakable-space-face))
		   ''c-nonbreakable-space-face)))
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      ))

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(defun c-font-lock-invalid-single-quotes (limit)
  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  ;;
  ;; This function fontifies invalid single quotes with
  ;; `font-lock-warning-face'.  These are the single quotes which
  ;; o - aren't inside a literal;
  ;; o - are marked with a syntax-table text property value '(1); and
  ;; o - are NOT marked with a non-null c-digit-separator property.
  (let ((limits (c-literal-limits))
	state beg end)
    (if limits
	(goto-char (cdr limits)))	; Even for being in a ' '
    (while (< (point) limit)
      (setq beg (point))
      (setq state (parse-partial-sexp (point) limit nil nil nil 'syntax-table))
      (setq end (point))
      (goto-char beg)
      (while (progn (skip-chars-forward "^'" end)
		    (< (point) end))
	(if (and (equal (c-get-char-property (point) 'syntax-table) '(1))
		 (not (c-get-char-property (point) 'c-digit-separator)))
	    (c-put-font-lock-face (point) (1+ (point)) font-lock-warning-face))
	(forward-char))
      (parse-partial-sexp end limit nil nil state 'syntax-table)))
    nil)

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(c-lang-defconst c-basic-matchers-before
  "Font lock matchers for basic keywords, labels, references and various
other easily recognizable things that should be fontified before generic
casts and declarations are fontified.  Used on level 2 and higher."

  ;; Note: `c-font-lock-declarations' assumes that no matcher here
  ;; sets `font-lock-type-face' in languages where
  ;; `c-recognize-<>-arglists' is set.

  t `(;; Put a warning face on the opener of unclosed strings that
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      ;; can't span lines and on the "terminating" newlines.  Later font
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      ;; lock packages have a `font-lock-syntactic-face-function' for
      ;; this, but it doesn't give the control we want since any
      ;; fontification done inside the function will be
      ;; unconditionally overridden.
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      ("\\s|" 0 font-lock-warning-face t nil)
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      ;; Invalid single quotes.
      c-font-lock-invalid-single-quotes

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      ;; Fontify C++ raw strings.
      ,@(when (c-major-mode-is 'c++-mode)
	  '(c-font-lock-raw-strings))

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      ;; Fontify keyword constants.
      ,@(when (c-lang-const c-constant-kwds)
	  (let ((re (c-make-keywords-re nil (c-lang-const c-constant-kwds))))
	    (if (c-major-mode-is 'pike-mode)
		;; No symbol is a keyword after "->" in Pike.
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		`((eval . (list ,(concat "\\(\\=.?\\|[^>]\\|[^-]>\\)"
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					 "\\<\\(" re "\\)\\>")
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				2 c-constant-face-name)))
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	      `((eval . (list ,(concat "\\<\\(" re "\\)\\>")
			      1 c-constant-face-name))))))

      ;; Fontify all keywords except the primitive types.
      ,(if (c-major-mode-is 'pike-mode)
	   ;; No symbol is a keyword after "->" in Pike.
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	   `(,(concat "\\(\\=.?\\|[^>]\\|[^-]>\\)"
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		      "\\<" (c-lang-const c-regular-keywords-regexp))
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	     2 font-lock-keyword-face)
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	 `(,(concat "\\<" (c-lang-const c-regular-keywords-regexp))
	   1 font-lock-keyword-face))

      ;; Fontify leading identifiers in fully qualified names like
      ;; "foo::bar" in languages that supports such things.
      ,@(when (c-lang-const c-opt-identifier-concat-key)
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	  (if (c-major-mode-is 'java-mode)
	      ;; Java needs special treatment since "." is used both to
	      ;; qualify names and in normal indexing.  Here we look for
	      ;; capital characters at the beginning of an identifier to
	      ;; recognize the class.  "*" is also recognized to cover
	      ;; wildcard import declarations.  All preceding dot separated
	      ;; identifiers are taken as package names and therefore
	      ;; fontified as references.
	      `(,(c-make-font-lock-search-function
		  ;; Search for class identifiers preceded by ".".  The
		  ;; anchored matcher takes it from there.
		  (concat (c-lang-const c-opt-identifier-concat-key)
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			  (c-lang-const c-simple-ws) "*"
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			  (concat "\\("
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				  "[" c-upper "]"
				  "[" (c-lang-const c-symbol-chars) "]*"
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				  "\\|"
				  "\\*"
				  "\\)"))
		  `((let (id-end)
		      (goto-char (1+ (match-beginning 0)))
		      (while (and (eq (char-before) ?.)
				  (progn
				    (backward-char)
				    (c-backward-syntactic-ws)
				    (setq id-end (point))
				    (< (skip-chars-backward
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					,(c-lang-const c-symbol-chars))
				       0))
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				  (not (get-text-property (point) 'face)))
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			(c-put-font-lock-face (point) id-end
					      c-reference-face-name)
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			(c-backward-syntactic-ws)))
		    nil
		    (goto-char (match-end 0)))))

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	    `((,(byte-compile
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		 ;; Must use a function here since we match longer than
		 ;; we want to move before doing a new search.  This is
		 ;; not necessary for XEmacs since it restarts the
		 ;; search from the end of the first highlighted
		 ;; submatch (something that causes problems in other
		 ;; places).
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		 `(lambda (limit)
		    (while (re-search-forward
			    ,(concat "\\(\\<" ; 1
				     "\\(" (c-lang-const c-symbol-key) "\\)" ; 2
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				     (c-lang-const c-simple-ws) "*"
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				     (c-lang-const c-opt-identifier-concat-key)
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				     (c-lang-const c-simple-ws) "*"
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				     "\\)"
				     "\\("
				     (c-lang-const c-opt-after-id-concat-key)
				     "\\)")
			    limit t)
		      (unless (progn
				(goto-char (match-beginning 0))
				(c-skip-comments-and-strings limit))
			(or (get-text-property (match-beginning 2) 'face)
			    (c-put-font-lock-face (match-beginning 2)
						  (match-end 2)
						  c-reference-face-name))
			(goto-char (match-end 1))))))))))
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      ;; Fontify the special declarations in Objective-C.
      ,@(when (c-major-mode-is 'objc-mode)
	  `(;; Fontify class names in the beginning of message expressions.
	    ,(c-make-font-lock-search-function
	      "\\["
	      '((c-fontify-types-and-refs ()
		  (c-forward-syntactic-ws limit)
		  (let ((start (point)))
		    ;; In this case we accept both primitive and known types.
		    (when (eq (c-forward-type) 'known)
		      (goto-char start)
		      (let ((c-promote-possible-types t))
			(c-forward-type))))
		  (if (> (point) limit) (goto-char limit)))))

	    ;; The @interface/@implementation/@protocol directives.
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	    ,(c-make-font-lock-search-function
	      (concat "\\<"
		      (regexp-opt
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		       '("@interface" "@implementation" "@protocol")
		       t)
		      "\\>")
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	      '((c-fontify-types-and-refs
		    (;; The font-lock package in Emacs is known to clobber
		     ;; `parse-sexp-lookup-properties' (when it exists).
		     (parse-sexp-lookup-properties
		      (cc-eval-when-compile
			(boundp 'parse-sexp-lookup-properties))))
		  (c-forward-objc-directive)
		  nil)
		(goto-char (match-beginning 0))))))

      (eval . (list "\\(!\\)[^=]" 1 c-negation-char-face-name))
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      ))

(defun c-font-lock-complex-decl-prepare (limit)
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  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  ;;
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  ;; Called before any of the matchers in `c-complex-decl-matchers'.
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  ;;
  ;; This function does hidden buffer changes.
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  ;;(message "c-font-lock-complex-decl-prepare %s %s" (point) limit)

  ;; Clear the list of found types if we start from the start of the
  ;; buffer, to make it easier to get rid of misspelled types and
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  ;; variables that have gotten recognized as types in malformed code.
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  (when (bobp)
    (c-clear-found-types))

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  (c-skip-comments-and-strings limit)
  (when (< (point) limit)

    ;; Clear the c-type char properties which mark the region, to recalculate
    ;; them properly.  The most interesting properties are those put on the
    ;; closest token before the region.
    (save-excursion
      (let ((pos (point)))
	(c-backward-syntactic-ws)
	(c-clear-char-properties
	 (if (and (not (bobp))
		  (memq (c-get-char-property (1- (point)) 'c-type)
			'(c-decl-arg-start
			  c-decl-end
			  c-decl-id-start
			  c-decl-type-start)))
	     (1- (point))
	   pos)
	 limit 'c-type)))

    ;; Update `c-state-cache' to the beginning of the region.  This will
    ;; make `c-beginning-of-syntax' go faster when it's used later on,
    ;; and it's near the point most of the time.
    (c-parse-state)

    ;; Check if the fontified region starts inside a declarator list so
    ;; that `c-font-lock-declarators' should be called at the start.
    ;; The declared identifiers are font-locked correctly as types, if
    ;; that is what they are.
    (let ((prop (save-excursion
		  (c-backward-syntactic-ws)
		  (unless (bobp)
		    (c-get-char-property (1- (point)) 'c-type)))))
      (when (memq prop '(c-decl-id-start c-decl-type-start))
	(c-forward-syntactic-ws limit)
	(c-font-lock-declarators limit t (eq prop 'c-decl-type-start)
				 (not (c-bs-at-toplevel-p (point))))))

    (setq c-font-lock-context ;; (c-guess-font-lock-context)
	  (save-excursion
	    (if (and c-cpp-expr-intro-re
		     (c-beginning-of-macro)
		     (looking-at c-cpp-expr-intro-re))
		'in-cpp-expr)))
    nil))
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(defun c-font-lock-<>-arglists (limit)
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  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  ;;
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  ;; Fontify types and references in names containing angle bracket
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  ;; arglists from the point to LIMIT.  Note that
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  ;; `c-font-lock-declarations' has already handled many of them.
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  ;;
  ;; This function might do hidden buffer changes.
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  (c-skip-comments-and-strings limit)
  (when (< (point) limit)
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    (let (;; The font-lock package in Emacs is known to clobber
	  ;; `parse-sexp-lookup-properties' (when it exists).
	  (parse-sexp-lookup-properties
	   (cc-eval-when-compile
	     (boundp 'parse-sexp-lookup-properties)))
	  (c-parse-and-markup-<>-arglists t)
	  c-restricted-<>-arglists
	  id-start id-end id-face pos kwd-sym)

      (while (and (< (point) limit)
		  (re-search-forward c-opt-<>-arglist-start limit t))

	(setq id-start (match-beginning 1)
	      id-end (match-end 1)
	      pos (point))

	(goto-char id-start)
	(unless (c-skip-comments-and-strings limit)
	  (setq kwd-sym nil
		c-restricted-<>-arglists nil
		id-face (get-text-property id-start 'face))

	  (if (cond
	       ((eq id-face 'font-lock-type-face)
		;; The identifier got the type face so it has already been
		;; handled in `c-font-lock-declarations'.
		nil)

	       ((eq id-face 'font-lock-keyword-face)
		(when (looking-at c-opt-<>-sexp-key)
		  ;; There's a special keyword before the "<" that tells
		  ;; that it's an angle bracket arglist.
		  (setq kwd-sym (c-keyword-sym (match-string 1)))))

	       (t
		;; There's a normal identifier before the "<".  If we're not in
		;; a declaration context then we set `c-restricted-<>-arglists'
		;; to avoid recognizing templates in function calls like "foo (a
		;; < b, c > d)".
		(c-backward-syntactic-ws)
		(when (and (memq (char-before) '(?\( ?,))
			   (not (eq (get-text-property (1- (point)) 'c-type)
				    'c-decl-arg-start)))
		  (setq c-restricted-<>-arglists t))
		t))

	      (progn
		(goto-char (1- pos))
		;; Check for comment/string both at the identifier and
		;; at the "<".
		(unless (c-skip-comments-and-strings limit)

		  (c-fontify-types-and-refs ()
		    (when (c-forward-<>-arglist (c-keyword-member
						 kwd-sym 'c-<>-type-kwds))
		      (when (and c-opt-identifier-concat-key
				 (not (get-text-property id-start 'face)))
			(c-forward-syntactic-ws)
			(cond ((looking-at c-opt-identifier-concat-key)
			       (c-put-font-lock-face id-start id-end
						     c-reference-face-name))
			      ((eq (char-after) ?\())
			      (t (c-put-font-lock-face id-start id-end
						       'font-lock-type-face))))))

		  (goto-char pos)))
	    (goto-char pos))))))
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  nil)

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(defun c-font-lock-declarators (limit list types not-top
				      &optional template-class)
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  ;; Assuming the point is at the start of a declarator in a declaration,
  ;; fontify the identifier it declares.  (If TYPES is set, it does this via
  ;; the macro `c-fontify-types-and-refs'.)
  ;;
  ;; If LIST is non-nil, also fontify the ids in any following declarators in
  ;; a comma separated list (e.g.  "foo" and "*bar" in "int foo = 17, *bar;");
  ;; additionally, mark the commas with c-type property 'c-decl-id-start or
  ;; 'c-decl-type-start (according to TYPES).  Stop at LIMIT.
  ;;
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  ;; If TYPES is non-nil, fontify all identifiers as types.  If NOT-TOP is
  ;; non-nil, we are not at the top-level ("top-level" includes being directly
  ;; inside a class or namespace, etc.).
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  ;;
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  ;; TEMPLATE-CLASS is non-nil when the declaration is in template delimiters
  ;; and was introduced by, e.g. "typename" or "class", such that if there is
  ;; a default (introduced by "="), it will be fontified as a type.
  ;; E.g. "<class X = Y>".
  ;;
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  ;; Nil is always returned.  The function leaves point at the delimiter after
  ;; the last declarator it processes.
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  ;;
  ;; This function might do hidden buffer changes.
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  ;;(message "c-font-lock-declarators from %s to %s" (point) limit)
  (c-fontify-types-and-refs
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      ()
    (c-do-declarators
     limit list not-top
     (if types 'c-decl-type-start 'c-decl-id-start)
     (lambda (id-start id-end end-pos not-top is-function init-char)
       (if types
	   ;; Register and fontify the identifier as a type.
	   (let ((c-promote-possible-types t))
	     (goto-char id-start)
	     (c-forward-type))
	 ;; The following doesn't work properly (yet, 2018-09-22).
	 ;; (c-put-font-lock-face id-start id-end
	 ;; 		       (if is-function
	 ;; 			   'font-lock-function-name-face
	 ;; 			 'font-lock-variable-name-face))
	 (when (and c-last-identifier-range
	 	    (not (get-text-property (car c-last-identifier-range)
	 				    'face)))
	   ;; We use `c-last-identifier-range' rather than `id-start' and
	   ;; `id-end', since the latter two can be erroneous.  E.g. in
	   ;; "~Foo", `id-start' is at the tilde.  This is a bug in
	   ;; `c-forward-declarator'.
	   (c-put-font-lock-face (car c-last-identifier-range)
	 			 (cdr c-last-identifier-range)
	 			 (if is-function
	 			     'font-lock-function-name-face
	 			   'font-lock-variable-name-face))))
       (and template-class
	    (eq init-char ?=)		; C++ "<class X = Y>"?
	    (progn
	      (goto-char end-pos)
	      (c-forward-token-2 1 nil limit) ; Over "="
	      (let ((c-promote-possible-types t))
		(c-forward-type t))))))
    nil))
1076

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(defun c-get-fontification-context (match-pos not-front-decl &optional toplev)
  ;; Return a cons (CONTEXT . RESTRICTED-<>-ARGLISTS) for MATCH-POS.
  ;; NOT-FRONT-DECL is non-nil when a declaration later in the buffer than
  ;; MATCH-POS has already been parsed.  TOPLEV is non-nil when MATCH-POS is
  ;; known to be at "top level", i.e. outside any braces, or directly inside a
  ;; namespace, class, etc.
  ;;
  ;; CONTEXT is the fontification context of MATCH-POS, and is one of the
  ;; following:
  ;; 'decl     In a comma-separated declaration context (typically
  ;;           inside a function declaration arglist).
  ;; '<>       In an angle bracket arglist.
  ;; 'arglist  Some other type of arglist.
  ;; 'top      Some other context and point is at the top-level (either
  ;;           outside any braces or directly inside a class or namespace,
  ;;           etc.)
  ;; nil       Some other context or unknown context.  Includes
  ;;           within the parens of an if, for, ... construct.
  ;; 'not-decl Definitely not in a declaration.
  ;;
  ;; RESTRICTED-<>-ARGLISTS is non-nil when a scan of template/generic
  ;; arguments lists (i.e. lists enclosed by <...>) is more strict about what
  ;; characters it allows within the list.
  (let ((type (and (> match-pos (point-min))
		   (c-get-char-property (1- match-pos) 'c-type))))
    (cond ((not (memq (char-before match-pos) '(?\( ?, ?\[ ?< ?{)))
	   (cons (and toplev 'top) nil))
	  ;; A control flow expression or a decltype
	  ((and (eq (char-before match-pos) ?\()
		(save-excursion
		  (goto-char match-pos)
		  (backward-char)
		  (c-backward-token-2)
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		  (cond
		   ((looking-at c-paren-stmt-key)
		    ;; Allow comma separated <> arglists in for statements.
		    (cons nil nil))
		   ((or (looking-at c-block-stmt-2-key)
			(looking-at c-block-stmt-1-2-key)
			(looking-at c-typeof-key))
		    (cons nil t))
		   (t nil)))))
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	  ;; Near BOB.
	  ((<= match-pos (point-min))
	   (cons 'arglist t))
	  ;; Got a cached hit in a declaration arglist.
	  ((eq type 'c-decl-arg-start)
	   (cons 'decl nil))
	  ;; We're inside (probably) a brace list.
	  ((eq type 'c-not-decl)
	   (cons 'not-decl nil))
	  ;; Inside a C++11 lambda function arglist.
	  ((and (c-major-mode-is 'c++-mode)
		(eq (char-before match-pos) ?\()
		(save-excursion
		  (goto-char match-pos)
		  (c-backward-token-2)
		  (and
		   (c-safe (goto-char (scan-sexps (point) -1)))
		   (c-looking-at-c++-lambda-capture-list))))
	   (c-put-char-property (1- match-pos) 'c-type
				'c-decl-arg-start)
	   (cons 'decl nil))
	  ;; We're inside a brace list.
	  ((and (eq (char-before match-pos) ?{)
1142 1143 1144
		(c-inside-bracelist-p (1- match-pos)
				      (cdr (c-parse-state))
				      nil))
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	   (c-put-char-property (1- match-pos) 'c-type
				'c-not-decl)
	   (cons 'not-decl nil))
	  ;; We're inside an "ordinary" open brace.
	  ((eq (char-before match-pos) ?{)
	   (cons (and toplev 'top) nil))
	  ;; Inside an angle bracket arglist.
	  ((or (eq type 'c-<>-arg-sep)
	       (eq (char-before match-pos) ?<))
	   (cons '<> nil))
	  ;; Got a cached hit in some other type of arglist.
	  (type
	   (cons 'arglist t))
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	  ;; We're at a C++ uniform initialization.
	  ((and (c-major-mode-is 'c++-mode)
		(eq (char-before match-pos) ?\()
		(save-excursion
		  (goto-char match-pos)
		  (and
		   (zerop (c-backward-token-2 2))
		   (looking-at c-identifier-start)
		   (c-got-face-at (point)
				  '(font-lock-variable-name-face)))))
	   (cons 'not-decl nil))
1169
	  ((and not-front-decl
1170 1171 1172 1173 1174
	   ;; The point is within the range of a previously
	   ;; encountered type decl expression, so the arglist
	   ;; is probably one that contains declarations.
	   ;; However, if `c-recognize-paren-inits' is set it
	   ;; might also be an initializer arglist.
1175 1176 1177 1178
		(or (not c-recognize-paren-inits)
		    (save-excursion
		      (goto-char match-pos)
		      (not (c-back-over-member-initializers)))))
1179 1180 1181 1182 1183 1184 1185
	   ;; The result of this check is cached with a char
	   ;; property on the match token, so that we can look
	   ;; it up again when refontifying single lines in a
	   ;; multiline declaration.
	   (c-put-char-property (1- match-pos)
				'c-type 'c-decl-arg-start)
	   (cons 'decl nil))
1186
	  ;; Got (an) open paren(s) preceded by an arith operator.
1187 1188
	  ((and (eq (char-before match-pos) ?\()
		(save-excursion
1189
		  (goto-char match-pos)
1190
		  (while
1191 1192
		      (and (zerop (c-backward-token-2))
			   (eq (char-after) ?\()))
1193
		  (looking-at c-arithmetic-op-regexp)))
1194
	   (cons nil nil))
1195 1196 1197
	  ;; In a C++ member initialization list.
	  ((and (eq (char-before match-pos) ?,)
	  	(c-major-mode-is 'c++-mode)
1198 1199 1200
	  	(save-excursion
		  (goto-char match-pos)
		  (c-back-over-member-initializers)))
1201 1202
	   (c-put-char-property (1- match-pos) 'c-type 'c-not-decl)
	   (cons 'not-decl nil))
1203 1204
	  ;; At start of a declaration inside a declaration paren.
	  ((save-excursion
1205
	     (goto-char match-pos)
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	     (and (memq (char-before match-pos) '(?\( ?\,))
		  (c-go-up-list-backward match-pos)
		  (eq (char-after) ?\()
		  (let ((type (c-get-char-property (point) 'c-type)))
		    (or (memq type '(c-decl-arg-start c-decl-type-start))
			(and
			 (progn (c-backward-syntactic-ws) t)
			 (c-back-over-compound-identifier)
			 (progn
			   (c-backward-syntactic-ws)
			   (or (bobp)
			       (progn
				 (setq type (c-get-char-property (1- (point))
								 'c-type))
				 (memq type '(c-decl-arg-start
					      c-decl-type-start))))))))))
	   (cons 'decl nil))
	  (t (cons 'arglist t)))))

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(defun c-font-lock-single-decl (limit decl-or-cast match-pos context toplev)
  ;; Try to fontify a single declaration, together with all its declarators.
  ;; Return nil if we're successful, non-nil if we fail.  POINT should be
  ;; positioned at the start of the putative declaration before calling.
  ;; POINT is left undefined by this function.
  ;;
  ;; LIMIT sets a maximum position we'll fontify out to.
  ;; DECL-OR-CAST has the form of a result from `c-forward-decl-or-cast-1',
  ;;   and must indicate a declaration (i.e. not be nil or 'cast).
  ;; MATCH-POS is the position after the last symbol before the decl.
  ;; CONTEXT is the context of the current decl., as determined by
  ;;   c-get-fontification-context.
  ;; TOPLEV is non-nil if the decl. is at the top level (i.e. outside any
  ;;   braces, or directly inside a class, namespace, etc.)

  ;; Do we have an expression as the second or third clause of
  ;; a "for" paren expression?
  (if (save-excursion
	(and
	 (car (cddr decl-or-cast))	; maybe-expression flag.
	 (c-go-up-list-backward)
	 (eq (char-after) ?\()
	 (progn (c-backward-syntactic-ws)
		(c-simple-skip-symbol-backward))
	 (looking-at c-paren-stmt-key)
	 (progn (goto-char match-pos)
		(while (and (eq (char-before) ?\))
			    (c-go-list-backward))
		  (c-backward-syntactic-ws))
		(eq (char-before) ?\;))))
      ;; We've got an expression in "for" parens.  Remove the
      ;; "type" that would spuriously get fontified.
      (let ((elt (and (consp c-record-type-identifiers)
		      (assq (cadr (cddr decl-or-cast))
			    c-record-type-identifiers))))
	(when elt
	  (setq c-record-type-identifiers
		(c-delq-from-dotted-list
		 elt c-record-type-identifiers)))
	t)
    ;; Back up to the type to fontify the declarator(s).
    (goto-char (car decl-or-cast))

    (let ((decl-list
	   (if (not (memq context '(nil top)))
	       ;; Should normally not fontify a list of
	       ;; declarators inside an arglist, but the first
	       ;; argument in the ';' separated list of a "for"
	       ;; statement is an exception.
	       (when (eq (char-before match-pos) ?\()
		 (save-excursion
		   (goto-char (1- match-pos))
		   (c-backward-syntactic-ws)
		   (and (c-simple-skip-symbol-backward)
			(looking-at c-paren-stmt-key))))
1280 1281 1282 1283 1284 1285
	     t))
	  (template-class (and (eq context '<>)
			       (save-excursion
				 (goto-char match-pos)
				 (c-forward-syntactic-ws)
				 (looking-at c-template-typename-key)))))
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
      ;; Fix the `c-decl-id-start' or `c-decl-type-start' property
      ;; before the first declarator if it's a list.
      ;; `c-font-lock-declarators' handles the rest.
      (when decl-list
	(save-excursion
	  (c-backward-syntactic-ws)
	  (unless (bobp)
	    (c-put-char-property (1- (point)) 'c-type
				 (if (cadr decl-or-cast)
				     'c-decl-type-start
				   'c-decl-id-start)))))
      (c-font-lock-declarators
       (min limit (point-max)) decl-list
1299
       (cadr decl-or-cast) (not toplev) template-class))
1300 1301 1302 1303 1304 1305 1306

    ;; A declaration has been successfully identified, so do all the
    ;; fontification of types and refs that've been recorded.
    (c-fontify-recorded-types-and-refs)
    nil))


1307
(defun c-font-lock-declarations (limit)
1308 1309 1310
  ;; Fontify all the declarations, casts and labels from the point to LIMIT.
  ;; Assumes that strings and comments have been fontified already.
  ;;
1311 1312 1313 1314 1315 1316
  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  ;;
1317
  ;; This function might do hidden buffer changes.
1318 1319

  ;;(message "c-font-lock-declarations search from %s to %s" (point) limit)
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528
  (c-skip-comments-and-strings limit)
  (when (< (point) limit)
  
    (save-restriction
      (let (;; The position where `c-find-decl-spots' last stopped.
	    start-pos
	    ;; o - 'decl if we're in an arglist containing declarations
	    ;;   (but if `c-recognize-paren-inits' is set it might also be
	    ;;   an initializer arglist);
	    ;; o - '<> if the arglist is of angle bracket type;
	    ;; o - 'arglist if it's some other arglist;
	    ;; o - nil, if not in an arglist at all.  This includes the
	    ;;   parenthesized condition which follows "if", "while", etc.
	    context
	    ;; A list of starting positions of possible type declarations, or of
	    ;; the typedef preceding one, if any.
	    last-cast-end
	    ;; The result from `c-forward-decl-or-cast-1'.
	    decl-or-cast
	    ;; The maximum of the end positions of all the checked type
	    ;; decl expressions in the successfully identified
	    ;; declarations.  The position might be either before or
	    ;; after the syntactic whitespace following the last token
	    ;; in the type decl expression.
	    (max-type-decl-end 0)
	    ;; Same as `max-type-decl-*', but used when we're before
	    ;; `token-pos'.
	    (max-type-decl-end-before-token 0)
	    ;; End of <..> construct which has had c-<>-arg-sep c-type
	    ;; properties set within it.
	    (max-<>-end 0)
	    ;; Set according to the context to direct the heuristics for
	    ;; recognizing C++ templates.
	    c-restricted-<>-arglists
	    ;; Turn on recording of identifier ranges in
	    ;; `c-forward-decl-or-cast-1' and `c-forward-label' for
	    ;; later fontification.
	    (c-record-type-identifiers t)
	    label-type
	    c-record-ref-identifiers
	    ;; Make `c-forward-type' calls mark up template arglists if
	    ;; it finds any.  That's necessary so that we later will
	    ;; stop inside them to fontify types there.
	    (c-parse-and-markup-<>-arglists t)
	    ;; The font-lock package in Emacs is known to clobber
	    ;; `parse-sexp-lookup-properties' (when it exists).
	    (parse-sexp-lookup-properties
	     (cc-eval-when-compile
	       (boundp 'parse-sexp-lookup-properties))
	     ))

	;; Below we fontify a whole declaration even when it crosses the limit,
	;; to avoid gaps when jit/lazy-lock fontifies the file a block at a
	;; time.  That is however annoying during editing, e.g. the following is
	;; a common situation while the first line is being written:
	;;
	;;     my_variable
	;;     some_other_variable = 0;
	;;
	;; font-lock will put the limit at the beginning of the second line
	;; here, and if we go past it we'll fontify "my_variable" as a type and
	;; "some_other_variable" as an identifier, and the latter will not
	;; correct itself until the second line is changed.  To avoid that we
	;; narrow to the limit if the region to fontify is a single line.
	(if (<= limit (c-point 'bonl))
	    (narrow-to-region
	     (point-min)
	     (save-excursion
	       ;; Narrow after any operator chars following the limit though,
	       ;; since those characters can be useful in recognizing a
	       ;; declaration (in particular the '{' that opens a function body
	       ;; after the header).
	       (goto-char limit)
	       (skip-chars-forward c-nonsymbol-chars)
	       (point))))

	(c-find-decl-spots
	 limit
	 c-decl-start-re
	 (eval c-maybe-decl-faces)

	 (lambda (match-pos inside-macro &optional toplev)
	   ;; Note to maintainers: don't use `limit' inside this lambda form;
	   ;; c-find-decl-spots sometimes narrows to less than `limit'.
	   (setq start-pos (point))
	   (when
	       ;; The result of the form below is true when we don't recognize a
	       ;; declaration or cast, and we don't recognize a "non-decl",
	       ;; typically a brace list.
	       (if (or (and (eq (get-text-property (point) 'face)
				'font-lock-keyword-face)
			    (looking-at c-not-decl-init-keywords))
		       (and c-macro-with-semi-re
			    (looking-at c-macro-with-semi-re))) ; 2008-11-04
		   ;; Don't do anything more if we're looking at a keyword that
		   ;; can't start a declaration.
		   t

		 ;; Set `context' and `c-restricted-<>-arglists'.  Look for
		 ;; "<" for the sake of C++-style template arglists.
		 ;; Ignore "(" when it's part of a control flow construct
		 ;; (e.g. "for (").
		 (let ((got-context
			(c-get-fontification-context
			 match-pos
			 (< match-pos (if inside-macro
					  max-type-decl-end-before-token
					max-type-decl-end))
			 toplev)))
		   (setq context (car got-context)
			 c-restricted-<>-arglists (cdr got-context)))

		 ;; Check we haven't missed a preceding "typedef".
		 (when (not (looking-at c-typedef-key))
		   (c-backward-syntactic-ws)
		   (c-backward-token-2)
		   (or (looking-at c-typedef-key)
		       (goto-char start-pos)))

		 ;; In QT, "more" is an irritating keyword that expands to nothing.
		 ;; We skip over it to prevent recognition of "more slots: <symbol>"
		 ;; as a bitfield declaration.
		 (when (and (c-major-mode-is 'c++-mode)
			    (looking-at
			     (concat "\\(more\\)\\([^" c-symbol-chars "]\\|$\\)")))
		   (goto-char (match-end 1))
		   (c-forward-syntactic-ws))

		 ;; Now analyze the construct.
		 (if (eq context 'not-decl)
		     (progn
		       (setq decl-or-cast nil)
		       (if (c-syntactic-re-search-forward
			    "," (min limit (point-max)) 'at-limit t)
			   (c-put-char-property (1- (point)) 'c-type 'c-not-decl))
		       nil)
		   (setq decl-or-cast
			 (c-forward-decl-or-cast-1
			  match-pos context last-cast-end))

		   ;; Ensure that c-<>-arg-sep c-type properties are in place on the
		   ;; commas separating the arguments inside template/generic <..>s.
		   (when (and (eq (char-before match-pos) ?<)
			      (> match-pos max-<>-end))
		     (save-excursion
		       (goto-char match-pos)
		       (c-backward-token-2)
		       (if (and
			    (eq (char-after) ?<)
			    (let ((c-restricted-<>-arglists
				   (save-excursion
				     (c-backward-token-2)
				     (and
				      (not (looking-at c-opt-<>-sexp-key))
				      (progn (c-backward-syntactic-ws)
					     (memq (char-before) '(?\( ?,)))
				      (not (eq (c-get-char-property (1- (point))
								    'c-type)
					       'c-decl-arg-start))))))
			      (c-forward-<>-arglist nil)))
			   (setq max-<>-end (point)))))

		   (cond
		    ((eq decl-or-cast 'cast)
		     ;; Save the position after the previous cast so we can feed
		     ;; it to `c-forward-decl-or-cast-1' in the next round.  That
		     ;; helps it discover cast chains like "(a) (b) c".
		     (setq last-cast-end (point))
		     (c-fontify-recorded-types-and-refs)
		     nil)

		    (decl-or-cast
		     ;; We've found a declaration.

		     ;; Set `max-type-decl-end' or `max-type-decl-end-before-token'
		     ;; under the assumption that we're after the first type decl
		     ;; expression in the declaration now.  That's not really true;
		     ;; we could also be after a parenthesized initializer
		     ;; expression in C++, but this is only used as a last resort
		     ;; to slant ambiguous expression/declarations, and overall
		     ;; it's worth the risk to occasionally fontify an expression
		     ;; as a declaration in an initializer expression compared to
		     ;; getting ambiguous things in normal function prototypes
		     ;; fontified as expressions.
		     (if inside-macro
			 (when (> (point) max-type-decl-end-before-token)
			   (setq max-type-decl-end-before-token (point)))
		       (when (> (point) max-type-decl-end)
			 (setq max-type-decl-end (point))))
		     (goto-char start-pos)
		     (c-font-lock-single-decl limit decl-or-cast match-pos
					      context
					      (or toplev (nth 4 decl-or-cast))))

		    (t t))))

	     ;; It was a false alarm.  Check if we're in a label (or other
	     ;; construct with `:' except bitfield) instead.
	     (goto-char start-pos)
	     (when (setq label-type (c-forward-label t match-pos nil))
	       ;; Can't use `c-fontify-types-and-refs' here since we
	       ;; use the label face at times.
	       (cond ((eq label-type 'goto-target)
		      (c-put-font-lock-face (caar c-record-ref-identifiers)
					    (cdar c-record-ref-identifiers)
					    c-label-face-name))
		     ((eq label-type 'qt-1kwd-colon)
		      (c-put-font-lock-face (caar c-record-ref-identifiers)
					    (cdar c-record-ref-identifiers)
1529
					    'font-lock-keyword-face))
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		     ((eq label-type 'qt-2kwds-colon)
		      (mapc
		       (lambda (kwd)
			 (c-put-font-lock-face (car kwd) (cdr kwd)
					       'font-lock-keyword-face))
		       c-record-ref-identifiers)))
	       (setq c-record-ref-identifiers nil)
	       ;; `c-forward-label' has probably added a `c-decl-end'
	       ;; marker, so return t to `c-find-decl-spots' to signal
	       ;; that.
	       t))))

	nil))))
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(defun c-font-lock-enum-body (limit)
  ;; Fontify the identifiers of each enum we find by searching forward.
  ;;
  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  (while (search-forward-regexp c-enum-clause-introduction-re limit t)
    (when (save-excursion
	    (backward-char)
	    (c-backward-over-enum-header))
      (c-forward-syntactic-ws)
      (c-font-lock-declarators limit t nil t)))
  nil)

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(defun c-font-lock-enum-tail (limit)
  ;; Fontify an enum's identifiers when POINT is within the enum's brace
  ;; block.
  ;;
  ;; This function will be called from font-lock for a region bounded by POINT
  ;; and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; Fontification".
  ;;
  ;; Note that this function won't attempt to fontify beyond the end of the
  ;; current enum block, if any.
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  (c-skip-comments-and-strings limit)
  (when (< (point) limit)
    (let* ((paren-state (c-parse-state))
	   (encl-pos (c-most-enclosing-brace paren-state)))
      (when (and
	     encl-pos
	     (eq (char-after encl-pos) ?\{)
	     (save-excursion
	       (goto-char encl-pos)
	       (c-backward-over-enum-header)))
	(c-syntactic-skip-backward "^{," nil t)
	(c-put-char-property (1- (point)) 'c-type 'c-decl-id-start)
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	(c-forward-syntactic-ws)
	(c-font-lock-declarators limit t nil t))))
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  nil)

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(defun c-font-lock-cut-off-declarators (limit)
  ;; Fontify any declarators "cut off" from their declaring type at the start
  ;; of the region being fontified.
  ;;
  ;; This function will be called from font-lock- for a region bounded by
  ;; POINT and LIMIT, as though it were to identify a keyword for
  ;; font-lock-keyword-face.  It always returns NIL to inhibit this and
  ;; prevent a repeat invocation.  See elisp/lispref page "Search-based
  ;; fontification".
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  (c-skip-comments-and-strings limit)
  (when (< (point) limit)
    (let ((here (point))
	  (decl-search-lim (c-determine-limit 1000))
	  paren-state encl-pos token-end context decl-or-cast
	  start-pos top-level c-restricted-<>-arglists
	  c-recognize-knr-p)		; Strictly speaking, bogus, but it
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					; speeds up lisp.h tremendously.
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      (save-excursion
	(when (not (c-back-over-member-initializers))
	  (unless (or (eobp)
		      (looking-at "\\s(\\|\\s)"))
	    (forward-char))
	  (c-syntactic-skip-backward "^;{}" decl-search-lim t)
	  (when (eq (char-before) ?})
	    (c-go-list-backward)	; brace block of struct, etc.?
	    (c-syntactic-skip-backward "^;{}" decl-search-lim t))
	  (when (or (bobp)
		    (memq (char-before) '(?\; ?{ ?})))
	    (setq token-end (point))
	    (c-forward-syntactic-ws here)
	    (when (< (point) here)
	      ;; We're now putatively at the declaration.
	      (setq start-pos (point))
	      (setq paren-state (c-parse-state))
	      ;; At top level or inside a "{"?
	      (if (or (not (setq encl-pos
				 (c-most-enclosing-brace paren-state)))
		      (eq (char-after encl-pos) ?\{))
		  (progn
		    (setq top-level (c-at-toplevel-p))
		    (let ((got-context (c-get-fontification-context
					token-end nil top-level)))
		      (setq context (car got-context)
			    c-restricted-<>-arglists (cdr got-context)))
		    (setq decl-or-cast
			  (c-forward-decl-or-cast-1 token-end context nil))
		    (when (consp decl-or-cast)
		      (goto-char start-pos)
		      (c-font-lock-single-decl limit decl-or-cast token-end
					       context top-level))))))))
      nil)))