;;; cc-fonts.el --- font lock support for CC Mode
;; Copyright (C) 2002-2020 Free Software Foundation, Inc.
;; Authors: 2003- Alan Mackenzie
;; 2002- Martin Stjernholm
;; Maintainer: bug-cc-mode@gnu.org
;; Created: 07-Jan-2002
;; Keywords: c languages
;; Package: cc-mode
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; 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
;; along with GNU Emacs. If not, see .
;;; Commentary:
;; Some comments on the use of faces:
;;
;; o `c-label-face-name' is either `font-lock-constant-face' (in
;; Emacs), or `font-lock-reference-face'.
;;
;; 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-defvar c-block-comment-flag)
(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)
;; In Emacs font-lock-builtin-face has traditionally been
;; used for preprocessor directives.
'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))
;; This doesn't exist in some earlier versions of XEmacs 21.
'font-lock-constant-face
c-label-face-name))
(defconst c-reference-face-name
(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)))
;; 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))
(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))
(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)
;; 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.
(unless (face-inverse-video-p oldface)
(invert-face newface)))
((fboundp 'face-property-instance)
;; XEmacs. Same pitfall here.
(unless (face-property-instance oldface 'reverse)
(invert-face newface)))))
(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)
(eval-and-compile
;; 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.
;; 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)
(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.
;;
;; This function does a hidden buffer change.
(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'.
;;
;; This function does a hidden buffer change.
(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.
;;
;; This function does a hidden buffer change.
(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.
;;
;; This function does hidden buffer changes.
`(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.
;;
;; This function might do hidden buffer changes.
(when (c-got-face-at (point) c-literal-faces)
(while (progn
(goto-char (c-next-single-property-change
(point) 'face nil limit))
(and (< (point) limit)
(c-got-face-at (point) c-literal-faces))))
t))
(defun c-make-syntactic-matcher (regexp)
;; 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
`(lambda (limit)
(let (res)
(while (and (setq res (re-search-forward ,regexp limit t))
(progn
(goto-char (match-beginning 0))
(or (c-skip-comments-and-strings limit)
(progn
(goto-char (match-end 0))
nil)))))
res))))
(defun c-make-font-lock-search-form (regexp highlights &optional check-point)
;; Return a lisp form which will fontify every occurrence of REGEXP
;; (a regular expression, NOT a function) between POINT and `limit'
;; with HIGHLIGHTS, a list of highlighters as specified on page
;; "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))
(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))))
;; highlight is an "ANCHORED HIGHLIGHTER" of the form
;; (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))))
(defun c-make-font-lock-search-function (regexp &rest highlights)
;; 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
;; lambda more easily.
(byte-compile
`(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))))
,(c-make-font-lock-search-form regexp highlights))
nil)))
(defun c-make-font-lock-BO-decl-search-function (regexp &rest highlights)
;; 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
;; lambda more easily.
(byte-compile
`(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)))
(BOD-limit
(c-determine-limit 1000)))
(goto-char
(let ((here (point)))
(if (eq (car (c-beginning-of-decl-1 BOD-limit)) 'same)
(point)
here)))
,(c-make-font-lock-search-form regexp highlights))
nil)))
(defun c-make-font-lock-context-search-function (normal &rest state-stanzas)
;; 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
;; lambda more easily.
(byte-compile
`(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)
;; 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)
nil))))
; (eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
; '(progn
(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)
(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)));))
(defun c-fontify-recorded-types-and-refs ()
;; Convert the ranges recorded on `c-record-type-identifiers' and
;; `c-record-ref-identifiers' to fontification.
;;
;; This function does hidden buffer changes.
(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]\\)")
(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)))
`(;; Fontify "invalid" comment delimiters
,@(when (and (c-lang-const c-block-comment-starter)
(c-lang-const c-line-comment-starter))
`(c-maybe-font-lock-wrong-style-comments))
;; The stuff after #error and #warning is a message, so
;; fontify it as a string.
,@(when (c-lang-const c-cpp-message-directives)
(let* ((re (c-make-keywords-re 'appendable ; nil
(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 +\\(.*\\)$")
,(+ ncle-depth re-depth 1) font-lock-string-face t))))
;; Fontify filenames in #include <...> as strings.
,@(when (c-lang-const c-cpp-include-directives)
(let* ((re (c-make-keywords-re nil
(c-lang-const c-cpp-include-directives)))
(re-depth (regexp-opt-depth re)))
;; We used to use a font-lock "anchored matcher" here for
;; the paren syntax. This failed when the ">" was at EOL,
;; since `font-lock-fontify-anchored-keywords' terminated
;; its loop at EOL without executing our lambda form at
;; all.
`((,(c-make-font-lock-search-function
(concat noncontinued-line-end
(c-lang-const c-opt-cpp-prefix)
re
(c-lang-const c-syntactic-ws)
"\\(<[^>\n\r]*>?\\)")
`(,(+ ncle-depth re-depth sws-depth 1)
font-lock-string-face t)
`((let ((beg (match-beginning
,(+ ncle-depth re-depth sws-depth 1)))
(end (1- (match-end ,(+ ncle-depth re-depth
sws-depth 1)))))
(if (eq (char-after end) ?>)
(progn
(c-mark-<-as-paren beg)
(c-mark->-as-paren end))
(c-unmark-<->-as-paren beg)))
nil))))))
;; #define.
,@(when (c-lang-const c-opt-cpp-macro-define)
`((,(c-make-font-lock-search-function
(concat
noncontinued-line-end
(c-lang-const c-opt-cpp-prefix)
(c-lang-const c-opt-cpp-macro-define)
(c-lang-const c-nonempty-syntactic-ws)
"\\(" (c-lang-const ; 1 + ncle + nsws
c-symbol-key) "\\)"
(concat "\\(" ; 2 + ncle + nsws + c-sym-key
;; Macro with arguments - a "function".
"\\((\\)" ; 3 + ncle + nsws + c-sym-key
"\\|"
;; Macro without arguments - a "variable".
"\\([^(]\\|$\\)"
"\\)"))
`((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)))))))
;; Fontify cpp function names in preprocessor
;; expressions in #if and #elif.
,@(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))))
`((,(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)))))))
;; 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)))
(eval . (list ,(c-make-syntactic-matcher
(concat noncontinued-line-end
(c-lang-const c-opt-cpp-prefix)
"if\\(n\\)def\\>"))
,(+ ncle-depth 1)
c-negation-char-face-name
'append))
)))
,@(when (c-major-mode-is 'pike-mode)
;; Recognize hashbangs in Pike.
'((eval . (list "\\`#![^\n\r]*"
0 c-preprocessor-face-name))))
;; Make hard spaces visible through an inverted `font-lock-warning-face'.
(eval . (list
"\240"
0 (progn
(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)))
))
(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)
(defun c-maybe-font-lock-wrong-style-comments (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" comment delimiters with
;; `font-lock-warning-face'. A delimiter is "invalid" when
;; `c-mark-wrong-style-of-comment' is non-nil, and the delimiter style is
;; not the default specified by `c-block-comment-flag'.
(when c-mark-wrong-style-of-comment
(let* ((lit (c-semi-pp-to-literal (point)))
(s (car lit)) ; parse-partial-sexp state.
)
;; First, deal with and move out of any literal we start in.
(cond
((null (cadr lit))) ; Not in a literal
((eq (cadr lit) 'string)
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table)))
((and (not c-block-comment-flag) ; In an "invalid" block comment
(eq (cadr lit) 'c))
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table))
;; Font lock the block comment ender with warning face.
(when (not (nth 4 s))
(c-put-font-lock-face (- (point) (length c-block-comment-ender))
(point) font-lock-warning-face)))
(t ; In a line comment, or a "valid" block comment
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table))))
(while (< (point) limit)
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table))
(cond
((or (nth 3 s) ; In a string
(and (nth 4 s) ; In a comment
(eq (nth 7 s) ; Comment style
(if c-block-comment-flag
nil ; Block comment
1)))) ; Line comment
;; Move over a "valid" literal.
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table)))
((nth 4 s) ; In an invalid comment
;; Fontify the invalid comment opener.
(c-put-font-lock-face (nth 8 s) (point) font-lock-warning-face)
;; Move to end of comment or LIMIT.
(setq s (parse-partial-sexp (point) limit nil nil s 'syntax-table))
;; Fontify an invalid block comment ender, if that's what we have.
(when (and (not c-block-comment-flag)
(not (nth 4 s))) ; We're outside the comment
(c-put-font-lock-face (- (point) (length c-block-comment-ender))
(point) font-lock-warning-face)))))))
nil)
(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
;; can't span lines and on the "terminating" newlines. Later font
;; 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.
("\\s|" 0 font-lock-warning-face t nil)
;; Invalid single quotes.
c-font-lock-invalid-single-quotes
;; Fontify C++ raw strings.
,@(when (c-major-mode-is 'c++-mode)
'(c-font-lock-raw-strings))
;; 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.
`((eval . (list ,(concat "\\(\\=.?\\|[^>]\\|[^-]>\\)"
"\\<\\(" re "\\)\\>")
2 c-constant-face-name)))
`((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.
`(,(concat "\\(\\=.?\\|[^>]\\|[^-]>\\)"
"\\<" (c-lang-const c-regular-keywords-regexp))
2 font-lock-keyword-face)
`(,(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)
(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)
(c-lang-const c-simple-ws) "*"
(concat "\\("
"[" c-upper "]"
"[" (c-lang-const c-symbol-chars) "]*"
"\\|"
"\\*"
"\\)"))
`((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
,(c-lang-const c-symbol-chars))
0))
(not (get-text-property (point) 'face)))
(c-put-font-lock-face (point) id-end
c-reference-face-name)
(c-backward-syntactic-ws)))
nil
(goto-char (match-end 0)))))
`((,(byte-compile
;; 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).
`(lambda (limit)
(while (re-search-forward
,(concat "\\(\\<" ; 1
"\\(" (c-lang-const c-symbol-key) "\\)" ; 2
(c-lang-const c-simple-ws) "*"
(c-lang-const c-opt-identifier-concat-key)
(c-lang-const c-simple-ws) "*"
"\\)"
"\\("
(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))))))))))
;; 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.
,(c-make-font-lock-search-function
(concat "\\<"
(regexp-opt
'("@interface" "@implementation" "@protocol")
t)
"\\>")
'((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))
))
(defun c-font-lock-complex-decl-prepare (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".
;;
;; Called before any of the matchers in `c-complex-decl-matchers'.
;;
;; This function does hidden buffer changes.
;;(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
;; variables that have gotten recognized as types in malformed code.
(when (bobp)
(c-clear-found-types))
(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))
(defun c-font-lock-<>-arglists (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".
;;
;; Fontify types and references in names containing angle bracket
;; arglists from the point to LIMIT. Note that
;; `c-font-lock-declarations' has already handled many of them.
;;
;; This function might do hidden buffer changes.
(c-skip-comments-and-strings limit)
(when (< (point) 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)))
(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))))))
nil)
(defun c-font-lock-declarators (limit list types not-top
&optional template-class)
;; 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.
;;
;; 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.).
;;
;; 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. "".
;;
;; Nil is always returned. The function leaves point at the delimiter after
;; the last declarator it processes.
;;
;; This function might do hidden buffer changes.
;;(message "c-font-lock-declarators from %s to %s" (point) limit)
(c-fontify-types-and-refs
()
(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++ ""?
(progn
(goto-char end-pos)
(c-forward-token-2 1 nil limit) ; Over "="
(let ((c-promote-possible-types t))
(c-forward-type t))))))
nil))
(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)
(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)))))
;; 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) ?{)
(c-inside-bracelist-p (1- match-pos)
(cdr (c-parse-state))
nil))
(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))
;; 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))
((and not-front-decl
;; 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.
(or (not c-recognize-paren-inits)
(save-excursion
(goto-char match-pos)
(not (c-back-over-member-initializers)))))
;; 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))
;; Got (an) open paren(s) preceded by an arith operator.
((and (eq (char-before match-pos) ?\()
(save-excursion
(goto-char match-pos)
(while
(and (zerop (c-backward-token-2))
(eq (char-after) ?\()))
(looking-at c-arithmetic-op-regexp)))
(cons nil nil))
;; In a C++ member initialization list.
((and (eq (char-before match-pos) ?,)
(c-major-mode-is 'c++-mode)
(save-excursion
(goto-char match-pos)
(c-back-over-member-initializers)))
(c-put-char-property (1- match-pos) 'c-type 'c-not-decl)
(cons 'not-decl nil))
;; At start of a declaration inside a declaration paren.
((save-excursion
(goto-char match-pos)
(and (memq (char-before match-pos) '(?\( ?\,))
(c-go-up-list-backward match-pos
; c-determine-limit is too slow, here.
(max (- (point) 2000) (point-min)))
(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)))))
(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 nil (c-determine-limit 500))
(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))))
t))
(template-class (and (eq context '<>)
(save-excursion
(goto-char match-pos)
(c-forward-syntactic-ws)
(looking-at c-template-typename-key)))))
;; 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
(cadr decl-or-cast) (not toplev) template-class))
;; 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))
(defun c-font-lock-declarations (limit)
;; Fontify all the declarations, casts and labels from the point to LIMIT.
;; Assumes that strings and comments have been fontified already.
;;
;; 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 might do hidden buffer changes.
;;(message "c-font-lock-declarations search from %s to %s" (point) limit)
(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: "
;; 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)
'font-lock-keyword-face))
((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))))
(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 (and (< (point) limit)
(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)
(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.
(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)
(c-forward-syntactic-ws)
(c-font-lock-declarators limit t nil t))))
nil)
(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".
(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
; speeds up lisp.h tremendously.
(save-excursion
(when (not (c-back-over-member-initializers
(max (- (point) 2000) (point-min)))) ; c-determine-limit
; is too slow, here.
(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)))
(defun c-font-lock-enclosing-decls (limit)
;; Fontify the declarators of (nested) declarations we're in the middle of.
;; This is mainly for when a jit-lock etc. chunk starts inside the brace
;; block of a struct/union/class, etc.
;;
;; 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".
(c-skip-comments-and-strings limit)
(when (< (point) limit)
(let* ((paren-state (c-parse-state))
(decl-search-lim (c-determine-limit 1000))
in-typedef ps-elt)
;; Are we in any nested struct/union/class/etc. braces?
(while paren-state
(setq ps-elt (car paren-state)
paren-state (cdr paren-state))
(when (and (atom ps-elt)
(eq (char-after ps-elt) ?\{))
(goto-char ps-elt)
(c-syntactic-skip-backward "^;{}" decl-search-lim)
(c-forward-syntactic-ws)
(setq in-typedef (looking-at c-typedef-key))
(if in-typedef (c-forward-over-token-and-ws))
(when (and c-opt-block-decls-with-vars-key
(looking-at c-opt-block-decls-with-vars-key))
(goto-char ps-elt)
(when (c-safe (c-forward-sexp))
(c-forward-syntactic-ws)
(c-font-lock-declarators limit t in-typedef
(not (c-bs-at-toplevel-p (point)))))))))))
(defun c-font-lock-raw-strings (limit)
;; Fontify C++ raw strings.
;;
;; 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".
(let* ((state (c-semi-pp-to-literal (point)))
(string-start (and (eq (cadr state) 'string)
(car (cddr state))))
(raw-id (and string-start
(c-at-c++-raw-string-opener string-start)
(match-string-no-properties 1)))
(content-start (and raw-id (point))))
;; We go round the next loop twice per raw string, once for each "end".
(while (< (point) limit)
(if raw-id
;; Search for the raw string end delimiter
(progn
(when (search-forward-regexp (concat ")\\(" (regexp-quote raw-id) "\\)\"")
limit 'limit)
(c-put-font-lock-face content-start (match-beginning 1)
'font-lock-string-face)
(c-remove-font-lock-face (match-beginning 1) (point)))
(setq raw-id nil))
;; Search for the start of a raw string.
(when (search-forward-regexp
"R\\(\"\\)\\([^ ()\\\n\r\t]\\{0,16\\}\\)(" limit 'limit)
(when
;; Make sure we're not in a comment or string.
(and
(not (memq (c-get-char-property (match-beginning 0) 'face)
'(font-lock-comment-face font-lock-comment-delimiter-face
font-lock-string-face)))
(or (and (eobp)
(eq (c-get-char-property (1- (point)) 'face)
'font-lock-warning-face))
(not (eq (c-get-char-property (point) 'face) 'font-lock-comment-face))
;; (eq (c-get-char-property (point) 'face) 'font-lock-string-face)
(and (equal (c-get-char-property (match-end 2) 'syntax-table) '(1))
(equal (c-get-char-property (match-beginning 1) 'syntax-table)
'(1)))))
(let ((paren-prop (c-get-char-property (1- (point)) 'syntax-table)))
(if paren-prop
(progn
(c-put-font-lock-face (match-beginning 0) (match-end 0)
'font-lock-warning-face)
(when
(and
(equal paren-prop '(15))
(not (c-search-forward-char-property 'syntax-table '(15) limit)))
(goto-char limit)))
(c-remove-font-lock-face (match-beginning 0) (match-end 2))
(setq raw-id (match-string-no-properties 2))
(setq content-start (match-end 0)))))))))
nil)
(defun c-font-lock-c++-lambda-captures (limit)
;; Fontify the lambda capture component of C++ lambda declarations.
;;
;; 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".
(let (mode capture-default id-start id-end declaration sub-begin sub-end)
(while (and (< (point) limit)
(search-forward "[" limit t))
(when (progn (backward-char)
(prog1
(c-looking-at-c++-lambda-capture-list)
(forward-char)))
(c-forward-syntactic-ws)
(setq mode (and (memq (char-after) '(?= ?&))
(char-after)))
;; Is the first element of the list a bare "=" or "&"?
(when mode
(forward-char)
(c-forward-syntactic-ws)
(if (memq (char-after) '(?, ?\]))
(progn
(setq capture-default mode)
(when (eq (char-after) ?,)
(forward-char)
(c-forward-syntactic-ws)))
(c-backward-token-2)))
;; Go round the following loop once per captured item. We use "\\s)"
;; rather than "\\]" here to avoid infinite looping in this situation:
;; "unsigned items [] { [ }". The second "[" triggers this function,
;; but if we don't match the "}" with an "\\s)", the
;; `c-syntactic-re-search-forward' at the end of the loop fails to
;; move forward over it, leaving point stuck at the "}".
(while (and (not (looking-at "\\s)"))
(< (point) limit))
(if (eq (char-after) ?&)
(progn (setq mode ?&)
(forward-char)
(c-forward-syntactic-ws))
(setq mode ?=))
(if (c-on-identifier)
(progn
(setq id-start (point))
(forward-char)
(c-end-of-current-token)
(setq id-end (point))
(c-forward-syntactic-ws)
(setq declaration (eq (char-after) ?=))
(when declaration
(forward-char) ; over "="
(c-forward-syntactic-ws)
(setq sub-begin (point)))
(if (or (and (< (point) limit)
(c-syntactic-re-search-forward "," limit t t))
(and (c-go-up-list-forward nil limit)
(eq (char-before) ?\])))
(backward-char)
(goto-char limit))
(when declaration
(save-excursion
(setq sub-end (point))
(goto-char sub-begin)
(c-font-lock-c++-lambda-captures sub-end)))
(c-put-font-lock-face id-start id-end
(cond
(declaration
'font-lock-variable-name-face)
((and capture-default
(eq mode capture-default))
'font-lock-warning-face)
((eq mode ?=) font-lock-constant-face)
(t 'font-lock-variable-name-face))))
(c-syntactic-re-search-forward "," limit 'bound t))
(c-forward-syntactic-ws)
(when (eq (char-after) ?,)
(forward-char)
(c-forward-syntactic-ws)))
(setq capture-default nil)
(if (< (point) limit)
(forward-char))))) ; over the terminating "]" or other close paren.
nil)
(c-lang-defconst c-simple-decl-matchers
"Simple font lock matchers for types and declarations. These are used
on level 2 only and so aren't combined with `c-complex-decl-matchers'."
t `(;; Objective-C methods.
,@(when (c-major-mode-is 'objc-mode)
`((,(c-lang-const c-opt-method-key)
(,(byte-compile
(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))))
(save-restriction
(narrow-to-region (point-min) limit)
(c-font-lock-objc-method)))
nil))
(goto-char (match-end 1))))))
;; Fontify all type names and the identifiers in the
;; declarations they might start. Use eval here since
;; `c-known-type-key' gets its value from
;; `*-font-lock-extra-types' on mode init.
(eval . (list ,(c-make-font-lock-search-function
'c-known-type-key
'(1 'font-lock-type-face t)
'((c-font-lock-declarators limit t nil nil)
(save-match-data
(goto-char (match-end 1))
(c-forward-syntactic-ws))
(goto-char (match-end 1))))))
;; Fontify types preceded by `c-type-prefix-kwds' and the
;; identifiers in the declarations they might start.
,@(when (c-lang-const c-type-prefix-kwds)
(let* ((prefix-re (c-make-keywords-re nil
(c-lang-const c-type-prefix-kwds)))
(type-match (+ 2
(regexp-opt-depth prefix-re)
(c-lang-const c-simple-ws-depth))))
`((,(c-make-font-lock-search-function
(concat "\\<\\(" prefix-re "\\)" ; 1
(c-lang-const c-simple-ws) "+"
(concat "\\(" ; 2 + prefix-re + c-simple-ws
(c-lang-const c-symbol-key)
"\\)"))
`(,type-match
'font-lock-type-face t)
`((c-font-lock-declarators limit t nil nil)
(save-match-data
(goto-char (match-end ,type-match))
(c-forward-syntactic-ws))
(goto-char (match-end ,type-match))))))))
;; Fontify special declarations that lacks a type.
,@(when (c-lang-const c-typeless-decl-kwds)
`((,(c-make-font-lock-search-function
(concat "\\<\\("
(regexp-opt (c-lang-const c-typeless-decl-kwds))
"\\)\\>")
'((c-font-lock-declarators limit t nil nil)
(save-match-data
(goto-char (match-end 1))
(c-forward-syntactic-ws))
(goto-char (match-end 1)))))))
;; Fontify generic colon labels in languages that support them.
,@(when (c-lang-const c-recognize-colon-labels)
'(c-font-lock-labels))))
(c-lang-defconst c-complex-decl-matchers
"Complex font lock matchers for types and declarations. Used on level
3 and higher."
;; Note: This code in this form dumps a number of functions into the
;; resulting constant, `c-matchers-3'. At run time, font lock will call
;; each of them as a "FUNCTION" (see Elisp page "Search-based
;; Fontification"). The font lock region is delimited by POINT and the
;; single parameter, LIMIT. Each of these functions returns NIL (thus
;; inhibiting spurious font-lock-keyword-face highlighting and another
;; call).
t `(;; Initialize some things before the search functions below.
c-font-lock-complex-decl-prepare
,@(if (c-major-mode-is 'objc-mode)
;; Fontify method declarations in Objective-C, but first
;; we have to put the `c-decl-end' `c-type' property on
;; all the @-style directives that haven't been handled in
;; `c-basic-matchers-before'.
`(,(c-make-font-lock-search-function
(c-make-keywords-re t
;; Exclude "@class" since that directive ends with a
;; semicolon anyway.
(delete "@class"
(append (c-lang-const c-protection-kwds)
(c-lang-const c-other-decl-kwds)
nil)))
'((c-put-char-property (1- (match-end 1))
'c-type 'c-decl-end)))
c-font-lock-objc-methods))
;; Fontify declarators which have been cut off from their declaring
;; types at the start of the region.
c-font-lock-cut-off-declarators
;; Fontify all declarations, casts and normal labels.
c-font-lock-declarations
;; Fontify declarators when POINT is within their declaration.
c-font-lock-enclosing-decls
;; Fontify angle bracket arglists like templates in C++.
,@(when (c-lang-const c-recognize-<>-arglists)
'(c-font-lock-<>-arglists))
,@(when (c-major-mode-is 'c++-mode)
'(c-font-lock-c++-lambda-captures))
;; The first two rules here mostly find occurrences that
;; `c-font-lock-declarations' has found already, but not
;; declarations containing blocks in the type (see note below).
;; It's also useful to fontify these everywhere to show e.g. when
;; a type keyword is accidentally used as an identifier.
;; Fontify basic types.
,(let ((re (c-make-keywords-re nil
(c-lang-const c-primitive-type-kwds))))
(if (c-major-mode-is 'pike-mode)
;; No symbol is a keyword after "->" in Pike.
`(,(concat "\\(\\=.?\\|[^>]\\|[^-]>\\)"
"\\<\\(" re "\\)\\>")
2 font-lock-type-face)
`(,(concat "\\<\\(" re "\\)\\>")
1 'font-lock-type-face)))
;; Fontify the type in C++ "new" expressions.
,@(when (c-major-mode-is 'c++-mode)
;; This pattern is a probably a "(MATCHER . ANCHORED-HIGHLIGHTER)"
;; (see Elisp page "Search-based Fontification").
'(("\\"
(c-font-lock-c++-new))))
))
(defun c-font-lock-labels (limit)
;; Fontify all statement labels from the point to LIMIT. Assumes
;; that strings and comments have been fontified already. Nil is
;; always returned.
;;
;; Note: This function is only used on decoration level 2; this is
;; taken care of directly by the gargantuan
;; `c-font-lock-declarations' on higher levels.
;;
;; This function might do hidden buffer changes.
(let (continue-pos id-start
;; 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))))
(while (re-search-forward ":[^:]" limit t)
(setq continue-pos (point))
(goto-char (match-beginning 0))
(unless (c-skip-comments-and-strings limit)
(c-backward-syntactic-ws)
(and (setq id-start (c-on-identifier))
(not (get-text-property id-start 'face))
(progn
(goto-char id-start)
(c-backward-syntactic-ws)
(or
;; Check for a char that precedes a statement.
(memq (char-before) '(?\} ?\{ ?\;))
;; Check for a preceding label. We exploit the font
;; locking made earlier by this function.
(and (eq (char-before) ?:)
(progn
(backward-char)
(c-backward-syntactic-ws)
(not (bobp)))
(eq (get-text-property (1- (point)) 'face)
c-label-face-name))
;; Check for a keyword that precedes a statement.
(c-after-conditional)))
(progn
;; Got a label.
(goto-char id-start)
(looking-at c-symbol-key)
(c-put-font-lock-face (match-beginning 0) (match-end 0)
c-label-face-name)))
(goto-char continue-pos))))
nil)
(c-lang-defconst c-basic-matchers-after
"Font lock matchers for various things that should be fontified after
generic casts and declarations are fontified. Used on level 2 and
higher."
t `(,@(when (c-lang-const c-brace-list-decl-kwds)
;; Fontify the remaining identifiers inside an enum list when we start
;; inside it.
'(c-font-lock-enum-tail
;; Fontify the identifiers inside enum lists. (The enum type
;; name is handled by `c-simple-decl-matchers' or
;; `c-complex-decl-matchers' below.
c-font-lock-enum-body))
;; Fontify labels after goto etc.
,@(when (c-lang-const c-before-label-kwds)
`(;; (Got three different interpretation levels here,
;; which makes it a bit complicated: 1) The backquote
;; stuff is expanded when compiled or loaded, 2) the
;; eval form is evaluated at font-lock setup (to
;; substitute c-label-face-name correctly), and 3) the
;; resulting structure is interpreted during
;; fontification.)
(eval
. ,(let* ((c-before-label-re
(c-make-keywords-re nil
(c-lang-const c-before-label-kwds))))
`(list
,(concat "\\<\\(" c-before-label-re "\\)\\>"
"\\s *"
"\\(" ; identifier-offset
(c-lang-const c-symbol-key)
"\\)")
(list ,(+ (regexp-opt-depth c-before-label-re) 2)
c-label-face-name nil t))))))
;; Fontify the clauses after various keywords.
,@(when (or (c-lang-const c-type-list-kwds)
(c-lang-const c-ref-list-kwds)
(c-lang-const c-colon-type-list-kwds))
`((,(c-make-font-lock-BO-decl-search-function
(concat "\\<\\("
(c-make-keywords-re nil
(append (c-lang-const c-type-list-kwds)
(c-lang-const c-ref-list-kwds)
(c-lang-const c-colon-type-list-kwds)))
"\\)\\>")
'((c-fontify-types-and-refs ((c-promote-possible-types t))
(c-forward-keyword-clause 1)
(if (> (point) limit) (goto-char limit))))))))
,@(when (c-lang-const c-paren-type-kwds)
`((,(c-make-font-lock-search-function
(concat "\\<\\("
(c-make-keywords-re nil
(c-lang-const c-paren-type-kwds))
"\\)\\>")
'((c-fontify-types-and-refs ((c-promote-possible-types t))
(c-forward-keyword-clause 1)
(if (> (point) limit) (goto-char limit))))))))
,@(when (c-major-mode-is 'java-mode)
'((eval . (list "\\<\\(@[a-zA-Z0-9]+\\)\\>" 1 c-annotation-face))))
))
(c-lang-defconst c-matchers-1
t (c-lang-const c-cpp-matchers))
(c-lang-defconst c-matchers-2
t (append (c-lang-const c-matchers-1)
(c-lang-const c-basic-matchers-before)
(c-lang-const c-simple-decl-matchers)
(c-lang-const c-basic-matchers-after)))
(c-lang-defconst c-matchers-3
t (append (c-lang-const c-matchers-1)
(c-lang-const c-basic-matchers-before)
(c-lang-const c-complex-decl-matchers)
(c-lang-const c-basic-matchers-after)))
(defun c-get-doc-comment-style ()
;; Get the symbol (or list of symbols) constituting the document style.
;; Return nil if there is no such, otherwise something like `autodoc'.
(if (consp (car-safe c-doc-comment-style))
(cdr-safe (or (assq c-buffer-is-cc-mode c-doc-comment-style)
(assq 'other c-doc-comment-style)))
c-doc-comment-style))
(defun c-compose-keywords-list (base-list)
;; Incorporate the font lock keyword lists according to
;; `c-doc-comment-style' on the given keyword list and return it.
;; This is used in the function bindings of the
;; `*-font-lock-keywords-*' symbols since we have to build the list
;; when font-lock is initialized.
(unless (memq c-doc-face-name c-literal-faces)
(setq c-literal-faces (cons c-doc-face-name c-literal-faces)))
(let* ((doc-keywords (c-get-doc-comment-style))
(list (nconc (c--mapcan
(lambda (doc-style)
(let ((sym (intern
(concat (symbol-name doc-style)
"-font-lock-keywords"))))
(cond ((fboundp sym)
(funcall sym))
((boundp sym)
(append (eval sym) nil)))))
(if (listp doc-keywords)
doc-keywords
(list doc-keywords)))
base-list)))
;; Kludge: If `c-font-lock-complex-decl-prepare' is on the list we
;; move it first since the doc comment font lockers might add
;; `c-type' text properties, so they have to be cleared before that.
(when (memq 'c-font-lock-complex-decl-prepare list)
(setq list (cons 'c-font-lock-complex-decl-prepare
(delq 'c-font-lock-complex-decl-prepare
(append list nil)))))
list))
(defun c-override-default-keywords (def-var)
;; This is used to override the value on a `*-font-lock-keywords'
;; variable only if it's nil or has the same value as one of the
;; `*-font-lock-keywords-*' variables. Older font-lock packages
;; define a default value for `*-font-lock-keywords' which we want
;; to override, but we should otoh avoid clobbering a user setting.
;; This heuristic for that isn't perfect, but I can't think of any
;; better. /mast
(when (and (boundp def-var)
(memq (symbol-value def-var)
(cons nil
(mapcar
(lambda (suffix)
(let ((sym (intern (concat (symbol-name def-var)
suffix))))
(and (boundp sym) (symbol-value sym))))
'("-1" "-2" "-3")))))
;; The overriding is done by unbinding the variable so that the normal
;; defvar will install its default value later on.
(makunbound def-var)))
;;; C.
(c-override-default-keywords 'c-font-lock-keywords)
(defconst c-font-lock-keywords-1 (c-lang-const c-matchers-1 c)
"Minimal font locking for C mode.
Fontifies only preprocessor directives (in addition to the syntactic
fontification of strings and comments).")
(defconst c-font-lock-keywords-2 (c-lang-const c-matchers-2 c)
"Fast normal font locking for C mode.
In addition to `c-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `c-font-lock-extra-types', and the doc comment
styles specified by `c-doc-comment-style'.")
(defconst c-font-lock-keywords-3 (c-lang-const c-matchers-3 c)
"Accurate normal font locking for C mode.
Like the variable `c-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `c-font-lock-extra-types'.")
(defvar c-font-lock-keywords c-font-lock-keywords-3
"Default expressions to highlight in C mode.")
(defun c-font-lock-keywords-2 ()
(c-compose-keywords-list c-font-lock-keywords-2))
(defun c-font-lock-keywords-3 ()
(c-compose-keywords-list c-font-lock-keywords-3))
(defun c-font-lock-keywords ()
(c-compose-keywords-list c-font-lock-keywords))
;;; C++.
(defun c-font-lock-c++-new (limit)
;; FIXME!!! Put in a comment about the context of this function's
;; invocation. I think it's called as an ANCHORED-MATCHER within an
;; ANCHORED-HIGHLIGHTER. (2007/2/10).
;;
;; Assuming point is after a "new" word, check that it isn't inside
;; a string or comment, and if so try to fontify the type in the
;; allocation expression. Nil is always returned.
;;
;; As usual, C++ takes the prize in coming up with a hard to parse
;; syntax. :P
;;
;; This function might do hidden buffer changes.
(unless (c-skip-comments-and-strings limit)
(save-excursion
(catch 'false-alarm
;; A "new" keyword is followed by one to three expressions, where
;; the type is the middle one, and the only required part.
(let (expr1-pos expr2-pos
;; Enable recording of identifier ranges in `c-forward-type'
;; etc for later fontification. Not using
;; `c-fontify-types-and-refs' here since the ranges should
;; be fontified selectively only when an allocation
;; expression is successfully recognized.
(c-record-type-identifiers t)
c-record-ref-identifiers
;; 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-syntactic-ws)
;; The first placement arglist is always parenthesized, if it
;; exists.
(when (eq (char-after) ?\()
(setq expr1-pos (1+ (point)))
(condition-case nil
(c-forward-sexp)
(scan-error (throw 'false-alarm t)))
(c-forward-syntactic-ws))
;; The second expression is either a type followed by some "*" or
;; "[...]" or similar, or a parenthesized type followed by a full
;; identifierless declarator.
(setq expr2-pos (1+ (point)))
(cond ((eq (char-after) ?\())
((let ((c-promote-possible-types t))
(c-forward-type)))
(t (setq expr2-pos nil)))
(when expr1-pos
(cond
((not expr2-pos)
;; No second expression, so the first has to be a
;; parenthesized type.
(goto-char expr1-pos)
(let ((c-promote-possible-types t))
(c-forward-type)))
((eq (char-before expr2-pos) ?\()
;; Got two parenthesized expressions, so we have to look
;; closer at them to decide which is the type. No need to
;; handle `c-record-ref-identifiers' since all references
;; have already been handled by other fontification rules.
(let (expr1-res expr2-res)
(goto-char expr1-pos)
(when (setq expr1-res (c-forward-type))
(unless (looking-at
(cc-eval-when-compile
(concat (c-lang-const c-symbol-start c++)
"\\|[*:)[]")))
;; There's something after the would-be type that
;; can't be there, so this is a placement arglist.
(setq expr1-res nil)))
(goto-char expr2-pos)
(when (setq expr2-res (c-forward-type))
(unless (looking-at
(cc-eval-when-compile
(concat (c-lang-const c-symbol-start c++)
"\\|[*:)[]")))
;; There's something after the would-be type that can't
;; be there, so this is an initialization expression.
(setq expr2-res nil))
(when (and (c-go-up-list-forward)
(progn (c-forward-syntactic-ws)
(eq (char-after) ?\()))
;; If there's a third initialization expression
;; then the second one is the type, so demote the
;; first match.
(setq expr1-res nil)))
;; We fontify the most likely type, with a preference for
;; the first argument since a placement arglist is more
;; unusual than an initializer.
(cond ((memq expr1-res '(t known prefix)))
((memq expr2-res '(t known prefix)))
;; Presumably 'decltype's will be fontified elsewhere.
((eq expr1-res 'decltype))
((eq expr2-res 'decltype))
((eq expr1-res 'found)
(let ((c-promote-possible-types t))
(goto-char expr1-pos)
(c-forward-type)))
((eq expr2-res 'found)
(let ((c-promote-possible-types t))
(goto-char expr2-pos)
(c-forward-type)))
((and (eq expr1-res 'maybe) (not expr2-res))
(let ((c-promote-possible-types t))
(goto-char expr1-pos)
(c-forward-type)))
((and (not expr1-res) (eq expr2-res 'maybe))
(let ((c-promote-possible-types t))
(goto-char expr2-pos)
(c-forward-type)))
;; If both type matches are 'maybe then we're
;; too uncertain to promote either of them.
)))))
;; Fontify the type that now is recorded in
;; `c-record-type-identifiers', if any.
(c-fontify-recorded-types-and-refs)))))
nil)
(c-override-default-keywords 'c++-font-lock-keywords)
(defconst c++-font-lock-keywords-1 (c-lang-const c-matchers-1 c++)
"Minimal font locking for C++ mode.
Fontifies only preprocessor directives (in addition to the syntactic
fontification of strings and comments).")
(defconst c++-font-lock-keywords-2 (c-lang-const c-matchers-2 c++)
"Fast normal font locking for C++ mode.
In addition to `c++-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `c++-font-lock-extra-types', and the doc comment
styles specified by `c-doc-comment-style'.")
(defconst c++-font-lock-keywords-3 (c-lang-const c-matchers-3 c++)
"Accurate normal font locking for C++ mode.
Like the variable `c++-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `c++-font-lock-extra-types'.")
(defvar c++-font-lock-keywords c++-font-lock-keywords-3
"Default expressions to highlight in C++ mode.")
(defun c++-font-lock-keywords-2 ()
(c-compose-keywords-list c++-font-lock-keywords-2))
(defun c++-font-lock-keywords-3 ()
(c-compose-keywords-list c++-font-lock-keywords-3))
(defun c++-font-lock-keywords ()
(c-compose-keywords-list c++-font-lock-keywords))
;;; Objective-C.
(defun c-font-lock-objc-method ()
;; Assuming the point is after the + or - that starts an Objective-C
;; method declaration, fontify it. This must be done before normal
;; casts, declarations and labels are fontified since they will get
;; false matches in these things.
;;
;; This function might do hidden buffer changes.
(c-fontify-types-and-refs
((first t)
(c-promote-possible-types t))
(while (and
(progn
(c-forward-syntactic-ws)
;; An optional method type.
(if (eq (char-after) ?\()
(progn
(forward-char)
(c-forward-syntactic-ws)
(c-forward-type)
(prog1 (c-go-up-list-forward)
(c-forward-syntactic-ws)))
t))
;; The name. The first time it's the first part of
;; the function name, the rest of the time it's an
;; argument name.
(looking-at c-symbol-key)
(progn
(goto-char (match-end 0))
(c-put-font-lock-face (match-beginning 0)
(point)
(if first
'font-lock-function-name-face
'font-lock-variable-name-face))
(c-forward-syntactic-ws)
;; Another optional part of the function name.
(when (looking-at c-symbol-key)
(goto-char (match-end 0))
(c-put-font-lock-face (match-beginning 0)
(point)
'font-lock-function-name-face)
(c-forward-syntactic-ws))
;; There's another argument if a colon follows.
(eq (char-after) ?:)))
(forward-char)
(setq first nil))))
(defun c-font-lock-objc-methods (limit)
;; Fontify method declarations in Objective-C. Nil is always
;; returned.
;;
;; This function might do hidden buffer changes.
(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-find-decl-spots
limit
"[-+]"
nil
(lambda (_match-pos _inside-macro &optional _top-level)
(forward-char)
(c-font-lock-objc-method))))
nil)
(c-override-default-keywords 'objc-font-lock-keywords)
(defconst objc-font-lock-keywords-1 (c-lang-const c-matchers-1 objc)
"Minimal font locking for Objective-C mode.
Fontifies only compiler directives (in addition to the syntactic
fontification of strings and comments).")
(defconst objc-font-lock-keywords-2 (c-lang-const c-matchers-2 objc)
"Fast normal font locking for Objective-C mode.
In addition to `objc-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `objc-font-lock-extra-types', and the doc
comment styles specified by `c-doc-comment-style'.")
(defconst objc-font-lock-keywords-3 (c-lang-const c-matchers-3 objc)
"Accurate normal font locking for Objective-C mode.
Like the variable `objc-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `objc-font-lock-extra-types'.")
(defvar objc-font-lock-keywords objc-font-lock-keywords-3
"Default expressions to highlight in Objective-C mode.")
(defun objc-font-lock-keywords-2 ()
(c-compose-keywords-list objc-font-lock-keywords-2))
(defun objc-font-lock-keywords-3 ()
(c-compose-keywords-list objc-font-lock-keywords-3))
(defun objc-font-lock-keywords ()
(c-compose-keywords-list objc-font-lock-keywords))
;; Kludge to override the default value that
;; `objc-font-lock-extra-types' might have gotten from the font-lock
;; package. The value replaced here isn't relevant now anyway since
;; those types are builtin and therefore listed directly in
;; `c-primitive-type-kwds'.
(when (equal (sort (append objc-font-lock-extra-types nil) 'string-lessp)
'("BOOL" "Class" "IMP" "SEL"))
(setq objc-font-lock-extra-types
(cc-eval-when-compile (list (concat "[" c-upper "]\\sw*")))))
;;; Java.
(c-override-default-keywords 'java-font-lock-keywords)
(defconst java-font-lock-keywords-1 (c-lang-const c-matchers-1 java)
"Minimal font locking for Java mode.
Fontifies nothing except the syntactic fontification of strings and
comments.")
(defconst java-font-lock-keywords-2 (c-lang-const c-matchers-2 java)
"Fast normal font locking for Java mode.
In addition to `java-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `java-font-lock-extra-types', and the doc
comment styles specified by `c-doc-comment-style'.")
(defconst java-font-lock-keywords-3 (c-lang-const c-matchers-3 java)
"Accurate normal font locking for Java mode.
Like variable `java-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `java-font-lock-extra-types'.")
(defvar java-font-lock-keywords java-font-lock-keywords-3
"Default expressions to highlight in Java mode.")
(defun java-font-lock-keywords-2 ()
(c-compose-keywords-list java-font-lock-keywords-2))
(defun java-font-lock-keywords-3 ()
(c-compose-keywords-list java-font-lock-keywords-3))
(defun java-font-lock-keywords ()
(c-compose-keywords-list java-font-lock-keywords))
;;; CORBA IDL.
(c-override-default-keywords 'idl-font-lock-keywords)
(defconst idl-font-lock-keywords-1 (c-lang-const c-matchers-1 idl)
"Minimal font locking for CORBA IDL mode.
Fontifies nothing except the syntactic fontification of strings and
comments.")
(defconst idl-font-lock-keywords-2 (c-lang-const c-matchers-2 idl)
"Fast normal font locking for CORBA IDL mode.
In addition to `idl-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `idl-font-lock-extra-types', and the doc comment
styles specified by `c-doc-comment-style'.")
(defconst idl-font-lock-keywords-3 (c-lang-const c-matchers-3 idl)
"Accurate normal font locking for CORBA IDL mode.
Like the variable `idl-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `idl-font-lock-extra-types'.")
(defvar idl-font-lock-keywords idl-font-lock-keywords-3
"Default expressions to highlight in CORBA IDL mode.")
(defun idl-font-lock-keywords-2 ()
(c-compose-keywords-list idl-font-lock-keywords-2))
(defun idl-font-lock-keywords-3 ()
(c-compose-keywords-list idl-font-lock-keywords-3))
(defun idl-font-lock-keywords ()
(c-compose-keywords-list idl-font-lock-keywords))
;;; Pike.
(c-override-default-keywords 'pike-font-lock-keywords)
(defconst pike-font-lock-keywords-1 (c-lang-const c-matchers-1 pike)
"Minimal font locking for Pike mode.
Fontifies only preprocessor directives (in addition to the syntactic
fontification of strings and comments).")
(defconst pike-font-lock-keywords-2 (c-lang-const c-matchers-2 pike)
"Fast normal font locking for Pike mode.
In addition to `pike-font-lock-keywords-1', this adds fontification of
keywords, simple types, declarations that are easy to recognize, the
user defined types on `pike-font-lock-extra-types', and the doc
comment styles specified by `c-doc-comment-style'.")
(defconst pike-font-lock-keywords-3 (c-lang-const c-matchers-3 pike)
"Accurate normal font locking for Pike mode.
Like the variable `pike-font-lock-keywords-2' but detects declarations in a more
accurate way that works in most cases for arbitrary types without the
need for `pike-font-lock-extra-types'.")
(defvar pike-font-lock-keywords pike-font-lock-keywords-3
"Default expressions to highlight in Pike mode.")
(defun pike-font-lock-keywords-2 ()
(c-set-doc-comment-res)
(c-compose-keywords-list pike-font-lock-keywords-2))
(defun pike-font-lock-keywords-3 ()
(c-set-doc-comment-res)
(c-compose-keywords-list pike-font-lock-keywords-3))
(defun pike-font-lock-keywords ()
(c-set-doc-comment-res)
(c-compose-keywords-list pike-font-lock-keywords))
;;; Doc comments.
(cc-bytecomp-defvar c-doc-line-join-re)
;; matches a join of two lines in a doc comment.
;; This should not be changed directly, but instead set by
;; `c-setup-doc-comment-style'. This variable is used in `c-find-decl-spots'
;; in (e.g.) autodoc style comments to bridge the gap between a "@\n" at an
;; EOL and the token following "//!" on the next line.
(cc-bytecomp-defvar c-doc-bright-comment-start-re)
;; Matches the start of a "bright" comment, one whose contents may be
;; fontified by, e.g., `c-font-lock-declarations'.
(cc-bytecomp-defvar c-doc-line-join-end-ch)
;; A list of characters, each being a last character of a doc comment marker,
;; e.g. the ! from pike autodoc's "//!".
(defmacro c-set-doc-comment-re-element (suffix)
;; Set the variable `c-doc-line-join-re' to a buffer local value suitable
;; for the current doc comment style, or kill the local value.
(let ((var (intern (concat "c-doc" suffix))))
`(let* ((styles (c-get-doc-comment-style))
elts)
(when (atom styles)
(setq styles (list styles)))
(setq elts
(mapcar (lambda (style)
(let ((sym
(intern-soft
(concat (symbol-name style) ,suffix))))
(and sym
(boundp sym)
(symbol-value sym))))
styles))
(setq elts (delq nil elts))
(setq elts (and elts
(concat "\\("
(mapconcat #'identity elts "\\|")
"\\)")))
(if elts
(set (make-local-variable ',var) elts)
(kill-local-variable ',var)))))
(defmacro c-set-doc-comment-char-list (suffix)
;; Set the variable 'c-doc-' to the list of *-, which must
;; be characters, and * represents the doc comment style.
(let ((var (intern (concat "c-doc" suffix))))
`(let* ((styles (c-get-doc-comment-style))
elts)
(when (atom styles)
(setq styles (list styles)))
(setq elts
(mapcar (lambda (style)
(let ((sym
(intern-soft
(concat (symbol-name style) ,suffix))))
(and sym
(boundp sym)
(symbol-value sym))))
styles))
(setq elts (delq nil elts))
(if elts
(set (make-local-variable ',var) elts)
(kill-local-variable ',var)))))
(defun c-set-doc-comment-res ()
;; Set the variables `c-doc-line-join-re' and
;; `c-doc-bright-comment-start-re' from the current doc comment style(s).
(c-set-doc-comment-re-element "-line-join-re")
(c-set-doc-comment-re-element "-bright-comment-start-re")
(c-set-doc-comment-char-list "-line-join-end-ch"))
(defun c-font-lock-doc-comments (prefix limit keywords)
;; Fontify the comments between the point and LIMIT whose start
;; matches PREFIX with `c-doc-face-name'. Assumes comments have been
;; fontified with `font-lock-comment-face' already. nil is always
;; returned.
;;
;; After the fontification of a matching comment, fontification
;; according to KEYWORDS is applied inside it. It's a list like
;; `font-lock-keywords' except that anchored matches and eval
;; clauses aren't supported and that some abbreviated forms can't be
;; used. The buffer is narrowed to the comment while KEYWORDS is
;; applied; leading comment starters are included but trailing
;; comment enders for block comment are not.
;;
;; Note that faces added through KEYWORDS should never replace the
;; existing `c-doc-face-name' face since the existence of that face
;; is used as a flag in other code to skip comments.
;;
;; This function might do hidden buffer changes.
(let (comment-beg region-beg)
(if (memq (get-text-property (point) 'face)
'(font-lock-comment-face font-lock-comment-delimiter-face))
;; Handle the case when the fontified region starts inside a
;; comment.
(let ((start (c-literal-start)))
(setq region-beg (point))
(when start
(goto-char start))
(when (looking-at prefix)
(setq comment-beg (point)))))
(while (or
comment-beg
;; Search for the prefix until a match is found at the start
;; of a comment.
(while (when (re-search-forward prefix limit t)
(setq comment-beg (match-beginning 0))
(or (not (c-got-face-at comment-beg
c-literal-faces))
(and (/= comment-beg (point-min))
;; Cheap check which is unreliable (the previous
;; character could be the end of a previous
;; comment).
(c-got-face-at (1- comment-beg)
c-literal-faces)
;; Expensive reliable check.
(save-excursion
(goto-char comment-beg)
(c-in-literal)))))
(setq comment-beg nil))
(setq region-beg comment-beg))
(if (elt (parse-partial-sexp comment-beg (+ comment-beg 2)) 7)
;; Collect a sequence of doc style line comments.
(progn
(goto-char comment-beg)
(while (and (progn
(c-forward-single-comment)
(c-put-font-lock-face comment-beg (point)
c-doc-face-name)
(skip-syntax-forward " ")
(setq comment-beg (point))
(< (point) limit))
(looking-at prefix))))
(goto-char comment-beg)
(c-forward-single-comment)
(c-put-font-lock-face comment-beg (point) c-doc-face-name))
(if (> (point) limit) (goto-char limit))
(setq comment-beg nil)
(let ((region-end (point))
(keylist keywords) keyword matcher highlights)
(save-restriction
;; Narrow to the doc comment. Among other things, this
;; helps by making "^" match at the start of the comment.
;; Do not include a trailing block comment ender, though.
(and (> region-end (1+ region-beg))
(progn (goto-char region-end)
(backward-char 2)
(looking-at "\\*/"))
(setq region-end (point)))
(narrow-to-region region-beg region-end)
(while keylist
(setq keyword (car keylist)
keylist (cdr keylist)
matcher (car keyword))
(goto-char region-beg)
(while (if (stringp matcher)
(re-search-forward matcher region-end t)
(funcall matcher region-end))
(setq highlights (cdr keyword))
(if (consp (car highlights))
(while highlights
(font-lock-apply-highlight (car highlights))
(setq highlights (cdr highlights)))
(font-lock-apply-highlight highlights))))
(goto-char region-end)))))
nil)
(put 'c-font-lock-doc-comments 'lisp-indent-function 2)
(defun c-find-invalid-doc-markup (regexp limit)
;; Used to fontify invalid markup in doc comments after the correct
;; ones have been fontified: Find the first occurrence of REGEXP
;; between the point and LIMIT that only is fontified with
;; `c-doc-face-name'. If a match is found then submatch 0 surrounds
;; the first char and t is returned, otherwise nil is returned.
;;
;; This function might do hidden buffer changes.
(let (start)
(while (if (re-search-forward regexp limit t)
(not (eq (get-text-property
(setq start (match-beginning 0)) 'face)
c-doc-face-name))
(setq start nil)))
(when start
(store-match-data (list (copy-marker start)
(copy-marker (1+ start))))
t)))
;; GtkDoc patterns contributed by Masatake YAMATO .
(defconst gtkdoc-font-lock-doc-comments
(let ((symbol "[a-zA-Z0-9_]+")
(header "^ \\* "))
`((,(concat header "\\(" symbol "\\):[ \t]*$")
1 ,c-doc-markup-face-name prepend nil)
(,(concat symbol "()")
0 ,c-doc-markup-face-name prepend nil)
(,(concat header "\\(" "@" symbol "\\):")
1 ,c-doc-markup-face-name prepend nil)
(,(concat "[#%@]" symbol)
0 ,c-doc-markup-face-name prepend nil))
))
(defconst gtkdoc-font-lock-doc-protection
`(("< \\(public\\|private\\|protected\\) >"
1 ,c-doc-markup-face-name prepend nil)))
(defconst gtkdoc-font-lock-keywords
`((,(lambda (limit)
(c-font-lock-doc-comments "/\\*\\*\\([^*/\n\r].*\\)?$" limit
gtkdoc-font-lock-doc-comments)
(c-font-lock-doc-comments "/\\*< " limit
gtkdoc-font-lock-doc-protection)
))))
;; Javadoc.
(defconst javadoc-font-lock-doc-comments
`(("{@[a-z]+[^}\n\r]*}" ; "{@foo ...}" markup.
0 ,c-doc-markup-face-name prepend nil)
("^\\(/\\*\\)?\\(\\s \\|\\*\\)*\\(@[a-z]+\\)" ; "@foo ..." markup.
3 ,c-doc-markup-face-name prepend nil)
(,(concat "")
0 ,c-doc-markup-face-name prepend nil)
("&\\(\\sw\\|[.:]\\)+;" ; HTML entities.
0 ,c-doc-markup-face-name prepend nil)
;; Fontify remaining markup characters as invalid. Note
;; that the Javadoc spec is hazy about when "@" is
;; allowed in non-markup use.
(,(lambda (limit)
(c-find-invalid-doc-markup "[<>&]\\|{@" limit))
0 'font-lock-warning-face prepend nil)))
(defconst javadoc-font-lock-keywords
`((,(lambda (limit)
(c-font-lock-doc-comments "/\\*\\*" limit
javadoc-font-lock-doc-comments)))))
;; Pike autodoc.
(defconst autodoc-decl-keywords
;; Adorned regexp matching the keywords that introduce declarations
;; in Pike Autodoc.
(cc-eval-when-compile
(c-make-keywords-re t '("@decl" "@elem" "@index" "@member") 'pike-mode)))
(defconst autodoc-decl-type-keywords
;; Adorned regexp matching the keywords that are followed by a type.
(cc-eval-when-compile
(c-make-keywords-re t '("@elem" "@member") 'pike-mode)))
(defun autodoc-font-lock-line-markup (limit)
;; Fontify all line oriented keywords between the point and LIMIT.
;; Nil is always returned.
;;
;; This function might do hidden buffer changes.
(let ((line-re (concat "^\\(\\(/\\*!\\|\\s *\\("
c-current-comment-prefix
"\\)\\)\\s *\\)@[A-Za-z_-]+\\(\\s \\|$\\)"))
(markup-faces (list c-doc-markup-face-name c-doc-face-name)))
(while (and (< (point) limit)
(re-search-forward line-re limit t))
(goto-char (match-end 1))
(if (looking-at autodoc-decl-keywords)
(let* ((kwd-pos (point))
(start (match-end 1))
(pos start)
end)
(c-put-font-lock-face (point) pos markup-faces)
;; Put a declaration end mark at the markup keyword and
;; remove the faces from the rest of the line so that it
;; gets refontified as a declaration later on by
;; `c-font-lock-declarations'.
(c-put-char-property (1- pos) 'c-type 'c-decl-end)
(goto-char pos)
(while (progn
(end-of-line)
(setq end (point))
(and (eq (char-before) ?@)
(not (eobp))
(progn (forward-char)
(skip-syntax-forward " ")
(looking-at c-current-comment-prefix))))
(goto-char (match-end 0))
(c-remove-font-lock-face pos (1- end))
(c-put-font-lock-face (1- end) end markup-faces)
(setq pos (point)))
;; Include the final newline in the removed area. This
;; has no visual effect but it avoids some tricky special
;; cases in the testsuite wrt the differences in string
;; fontification in Emacs vs XEmacs.
(c-remove-font-lock-face pos (min (1+ (point)) (point-max)))
;; Must handle string literals explicitly inside the declaration.
(goto-char start)
(while (re-search-forward
"\"\\([^\\\"]\\|\\\\.\\)*\"\\|'\\([^\\']\\|\\\\.\\)*'"
end 'move)
(c-put-font-lock-string-face (match-beginning 0)
(point)))
;; Fontify types after keywords that always are followed
;; by them.
(goto-char kwd-pos)
(when (looking-at autodoc-decl-type-keywords)
(c-fontify-types-and-refs ((c-promote-possible-types t))
(goto-char start)
(c-forward-syntactic-ws)
(c-forward-type))))
;; Mark each whole line as markup, as long as the logical line
;; continues.
(while (progn
(c-put-font-lock-face (point)
(progn (end-of-line) (point))
markup-faces)
(and (eq (char-before) ?@)
(not (eobp))
(progn (forward-char)
(skip-syntax-forward " ")
(looking-at c-current-comment-prefix))))
(goto-char (match-end 0))))))
nil)
(defconst autodoc-font-lock-doc-comments
`(("@\\(\\w+{\\|\\[\\([^]@\n\r]\\|@@\\)*\\]\\|[@}]\\|$\\)"
;; In-text markup.
0 ,c-doc-markup-face-name prepend nil)
(autodoc-font-lock-line-markup)
;; Fontify remaining markup characters as invalid.
(,(lambda (limit)
(c-find-invalid-doc-markup "@" limit))
0 'font-lock-warning-face prepend nil)
))
(defconst autodoc-line-join-re "@[\n\r][ \t]*/[/*]!")
;; Matches a line continuation in autodoc comment style.
(defconst autodoc-bright-comment-start-re "/[/*]!")
;; Matches an autodoc comment opener.
(defconst autodoc-line-join-end-ch ?!)
;; The final character of `autodoc-line-join-re'.
(defun autodoc-font-lock-keywords ()
;; Note that we depend on that `c-current-comment-prefix' has got
;; its proper value here.
;;
;; This function might do hidden buffer changes.
;; The `c-type' text property with `c-decl-end' is used to mark the
;; end of the `autodoc-decl-keywords' occurrences to fontify the
;; following declarations.
(setq c-type-decl-end-used t)
`((,(lambda (limit)
(c-font-lock-doc-comments "/[*/]!" limit
autodoc-font-lock-doc-comments)))))
;; Doxygen
(defconst doxygen-font-lock-doc-comments
;; TODO: Handle @code, @verbatim, @dot, @f etc. better by not highlighting
;; text inside of those commands. Something smarter than just regexes may be
;; needed to do that efficiently.
`((,(concat
;; Make sure that the special character has not been escaped. E.g. in
;; `\@foo' only `\@' is a command (similarly for other characters like
;; `\\foo', `\#%\".|\\\\]" ; single-character escapes
"\\|::\\|---?" ; \:: \-- \---
"\\)"
;; HTML tags and entities:
"\\|"
"\\|&\\(?:\\sw+\\|#[0-9]+\\|#x[0-9a-fA-F]+\\);"
"\\)")
1 ,c-doc-markup-face-name prepend nil)
;; Commands inside of strings are not commands so override highlighting with
;; string face. This also affects HTML attribute values if they are
;; surrounded with double quotes which may or may not be considered a good
;; thing.
("\\(?:^\\|[^\\@]\\)\\(\"[^\"[:cntrl:]]+\"\\)"
1 font-lock-string-face prepend nil)
;; HTML comments inside of the Doxygen comments.
("\\(?:^\\|[^\\@]\\)\\(\\)"
1 font-lock-comment-face prepend nil)
;; Autolinking. Doxygen auto-links anything that is a class name but we have
;; no hope of matching those. We are, however, able to match functions and
;; members using explicit scoped syntax. For functions, we can also find
;; them by noticing argument-list. Note that Doxygen accepts `::' as well
;; as `#' as scope operators.
(,(let* ((ref "[\\@]ref\\s-+")
(ref-opt (concat "\\(?:" ref "\\)?"))
(id "[a-zA-Z_][a-zA-Z_0-9]*")
(args "\\(?:()\\|([^()]*)\\)")
(scope "\\(?:#\\|::\\)"))
(concat
"\\(?:^\\|[^\\@/%:]\\)\\(?:"
ref-opt "\\(?1:" scope "?" "\\(?:" id scope "\\)+" "~?" id "\\)"
"\\|" ref-opt "\\(?1:" scope "~?" id "\\)"
"\\|" ref-opt "\\(?1:" scope "?" "~?" id "\\)" args
"\\|" ref "\\(?1:" "~?" id "\\)"
"\\|" ref-opt "\\(?1:~[A-Z][a-zA-Z0-9_]+\\)"
"\\)"))
1 font-lock-function-name-face prepend nil)
;; Match URLs and emails. This has two purposes. First of all, Doxygen
;; autolinks URLs. Second of all, `@bar' in `foo@bar.baz' has been matched
;; above as a command; try and overwrite it.
(,(let* ((host "[A-Za-z0-9]\\(?:[A-Za-z0-9-]\\{0,61\\}[A-Za-z0-9]\\)")
(fqdn (concat "\\(?:" host "\\.\\)+" host))
(comp "[!-(*--/-=?-~]+")
(path (concat "/\\(?:" comp "[.]+" "\\)*" comp)))
(concat "\\(?:mailto:\\)?[a-zA-0_.]+@" fqdn
"\\|https?://" fqdn "\\(?:" path "\\)?"))
0 font-lock-keyword-face prepend nil)))
(defconst doxygen-font-lock-keywords
`((,(lambda (limit)
(c-font-lock-doc-comments "/\\(?:/[/!]\\|\\*[\\*!]\\)"
limit doxygen-font-lock-doc-comments)))))
;; 2006-07-10: awk-font-lock-keywords has been moved back to cc-awk.el.
(cc-provide 'cc-fonts)
;; Local Variables:
;; indent-tabs-mode: t
;; tab-width: 8
;; End:
;;; cc-fonts.el ends here