1 ;;; cc-langs.el --- language specific settings for CC Mode -*- coding: utf-8 -*-
3 ;; Copyright (C) 1985, 1987, 1992-2014 Free Software Foundation, Inc.
5 ;; Authors: 2002- Alan Mackenzie
6 ;; 1998- Martin Stjernholm
7 ;; 1992-1999 Barry A. Warsaw
10 ;; 1985 Richard M. Stallman
11 ;; Maintainer: bug-cc-mode@gnu.org
12 ;; Created: 22-Apr-1997 (split from cc-mode.el)
13 ;; Keywords: c languages
16 ;; This file is part of GNU Emacs.
18 ;; GNU Emacs is free software: you can redistribute it and/or modify
19 ;; it under the terms of the GNU General Public License as published by
20 ;; the Free Software Foundation, either version 3 of the License, or
21 ;; (at your option) any later version.
23 ;; GNU Emacs is distributed in the hope that it will be useful,
24 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
25 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 ;; GNU General Public License for more details.
28 ;; You should have received a copy of the GNU General Public License
29 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
33 ;; HACKERS NOTE: There's heavy macro magic here. If you need to make
34 ;; changes in this or other files containing `c-lang-defconst' but
35 ;; don't want to read through the longer discussion below then read
38 ;; o A change in a `c-lang-defconst' or `c-lang-defvar' will not take
39 ;; effect if the file containing the mode init function (typically
40 ;; cc-mode.el) is byte compiled.
41 ;; o To make changes show in font locking you need to reevaluate the
42 ;; `*-font-lock-keywords-*' constants, which normally is easiest to
43 ;; do with M-x eval-buffer in cc-fonts.el.
44 ;; o In either case it's necessary to reinitialize the mode to make
45 ;; the changes show in an existing buffer.
47 ;;; Introduction to the language dependent variable system:
49 ;; This file contains all the language dependent variables, except
50 ;; those specific for font locking which reside in cc-fonts.el. As
51 ;; far as possible, all the differences between the languages that CC
52 ;; Mode supports are described with these variables only, so that the
53 ;; code can be shared.
55 ;; The language constant system (see cc-defs.el) is used to specify
56 ;; various language dependent info at a high level, such as lists of
57 ;; keywords, and then from them generate - at compile time - the
58 ;; various regexps and other low-level structures actually employed in
59 ;; the code at runtime.
61 ;; This system is also designed to make it easy for developers of
62 ;; derived modes to customize the source constants for new language
63 ;; variants, without having to keep up with the exact regexps etc that
64 ;; are used in each CC Mode version. It's possible from an external
65 ;; package to add a new language by inheriting an existing one, and
66 ;; then change specific constants as necessary for the new language.
67 ;; The old values for those constants (and the values of all the other
68 ;; high-level constants) may be used to build the new ones, and those
69 ;; new values will in turn be used by the low-level definitions here
70 ;; to build the runtime constants appropriately for the new language
71 ;; in the current version of CC Mode.
73 ;; Like elsewhere in CC Mode, the existence of a doc string signifies
74 ;; that a language constant is part of the external API, and that it
75 ;; therefore can be used with a high confidence that it will continue
76 ;; to work with future versions of CC Mode. Even so, it's not
77 ;; unlikely that such constants will change meaning slightly as this
78 ;; system is refined further; a certain degree of dependence on the CC
79 ;; Mode version is unavoidable when hooking in at this level. Also
80 ;; note that there's still work to be done to actually use these
81 ;; constants everywhere inside CC Mode; there are still hardcoded
82 ;; values in many places in the code.
84 ;; Separate packages will also benefit from the compile time
85 ;; evaluation; the byte compiled file(s) for them will contain the
86 ;; compiled runtime constants ready for use by (the byte compiled) CC
87 ;; Mode, and the source definitions in this file don't have to be
88 ;; loaded then. However, if a byte compiled package is loaded that
89 ;; has been compiled with a different version of CC Mode than the one
90 ;; currently loaded, then the compiled-in values will be discarded and
91 ;; new ones will be built when the mode is initialized. That will
92 ;; automatically trig a load of the file(s) containing the source
93 ;; definitions (i.e. this file and/or cc-fonts.el) if necessary.
95 ;; A small example of a derived mode is available at
96 ;; <http://cc-mode.sourceforge.net/derived-mode-ex.el>. It also
97 ;; contains some useful hints for derived mode developers.
99 ;;; Using language variables:
101 ;; The `c-lang-defvar' forms in this file comprise the language
102 ;; variables that CC Mode uses. It does not work to use
103 ;; `c-lang-defvar' anywhere else (which isn't much of a limitation
104 ;; since these variables sole purpose is to interface with the CC Mode
105 ;; core functions). The values in these `c-lang-defvar's are not
106 ;; evaluated right away but instead collected to a single large `setq'
107 ;; that can be inserted for a particular language with the
108 ;; `c-init-language-vars' macro.
110 ;; This file is only required at compile time, or when not running
111 ;; from byte compiled files, or when the source definitions for the
112 ;; language constants are requested.
118 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
122 (if (and (boundp 'byte-compile-dest-file)
123 (stringp byte-compile-dest-file))
124 (cons (file-name-directory byte-compile-dest-file) load-path)
126 (load "cc-bytecomp" nil t)))
128 (cc-require 'cc-defs)
129 (cc-require 'cc-vars)
132 ;; This file is not always loaded. See note above.
133 (cc-external-require 'cl)
136 ;;; Setup for the `c-lang-defvar' system.
139 ;; These are used to collect the init forms from the subsequent
140 ;; `c-lang-defvar' and `c-lang-setvar'. They are used to build the
141 ;; lambda in `c-make-init-lang-vars-fun' below, and to build `defvar's
142 ;; and `make-variable-buffer-local's in cc-engine and
143 ;; `make-local-variable's in `c-init-language-vars-for'.
144 (defvar c-lang-variable-inits nil)
145 (defvar c-lang-variable-inits-tail nil)
146 (setq c-lang-variable-inits (list nil)
147 c-lang-variable-inits-tail c-lang-variable-inits)
148 (defvar c-emacs-variable-inits nil)
149 (defvar c-emacs-variable-inits-tail nil)
150 (setq c-emacs-variable-inits (list nil)
151 c-emacs-variable-inits-tail c-emacs-variable-inits))
153 (defmacro c-lang-defvar (var val &optional doc)
154 "Declares the buffer local variable VAR to get the value VAL. VAL is
155 evaluated and assigned at mode initialization. More precisely, VAL is
156 evaluated and bound to VAR when the result from the macro
157 `c-init-language-vars' is evaluated.
159 `c-lang-const' is typically used in VAL to get the right value for the
160 language being initialized, and such calls will be macro expanded to
161 the evaluated constant value at compile time."
164 (eq (car-safe val) 'c-lang-const)
167 ;; Special case: If there's no docstring and the value is a
168 ;; simple (c-lang-const foo) where foo is the same name as VAR
169 ;; then take the docstring from the language constant foo.
170 (setq doc (get (intern (symbol-name (nth 1 val)) c-lang-constants)
171 'variable-documentation)))
175 (let ((elem (assq var (cdr c-lang-variable-inits))))
177 (setcdr elem (list val doc))
178 (setcdr c-lang-variable-inits-tail (list (list var val doc)))
179 (setq c-lang-variable-inits-tail (cdr c-lang-variable-inits-tail))))
181 ;; Return the symbol, like the other def* forms.
184 (defmacro c-lang-setvar (var val)
185 "Causes the variable VAR to be made buffer local and to get set to the
186 value VAL. VAL is evaluated and assigned at mode initialization. More
187 precisely, VAL is evaluated and bound to VAR when the result from the
188 macro `c-init-language-vars' is evaluated. VAR is typically a standard
189 Emacs variable like `comment-start'.
191 `c-lang-const' is typically used in VAL to get the right value for the
192 language being initialized, and such calls will be macro expanded to
193 the evaluated constant value at compile time."
194 (let ((elem (assq var (cdr c-emacs-variable-inits))))
196 (setcdr elem (list val)) ; Maybe remove "list", sometime. 2006-07-19
197 (setcdr c-emacs-variable-inits-tail (list (list var val)))
198 (setq c-emacs-variable-inits-tail (cdr c-emacs-variable-inits-tail))))
200 ;; Return the symbol, like the other def* forms.
203 (put 'c-lang-defvar 'lisp-indent-function 'defun)
204 ; (eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
206 (def-edebug-spec c-lang-defvar
207 (&define name def-form &optional stringp)) ;)
209 ;; Suppress "might not be defined at runtime" warning.
210 ;; This file is only used when compiling other cc files.
211 ;; These are defined in cl as aliases to the cl- versions.
212 ;(declare-function delete-duplicates "cl-seq" (cl-seq &rest cl-keys) t)
213 ;(declare-function mapcan "cl-extra" (cl-func cl-seq &rest cl-rest) t)
216 ;; Some helper functions used when building the language constants.
218 (defun c-filter-ops (ops opgroup-filter op-filter &optional xlate)
219 ;; Extract a subset of the operators in the list OPS in a DWIM:ey
220 ;; way. The return value is a plain list of operators:
222 ;; OPS either has the structure of `c-operators', is a single
223 ;; group in `c-operators', or is a plain list of operators.
225 ;; OPGROUP-FILTER specifies how to select the operator groups. It
226 ;; can be t to choose all groups, a list of group type symbols
227 ;; (such as 'prefix) to accept, or a function which will be called
228 ;; with the group symbol for each group and should return non-nil
229 ;; if that group is to be included.
231 ;; If XLATE is given, it's a function which is called for each
232 ;; matching operator and its return value is collected instead.
233 ;; If it returns a list, the elements are spliced directly into
234 ;; the final result, which is returned as a list with duplicates
235 ;; removed using `equal'.
237 ;; `c-mode-syntax-table' for the current mode is in effect during
238 ;; the whole procedure.
239 (unless (listp (car-safe ops))
240 (setq ops (list ops)))
241 (cond ((eq opgroup-filter t)
242 (setq opgroup-filter (lambda (opgroup) t)))
243 ((not (functionp opgroup-filter))
244 (setq opgroup-filter `(lambda (opgroup)
245 (memq opgroup ',opgroup-filter)))))
246 (cond ((eq op-filter t)
247 (setq op-filter (lambda (op) t)))
249 (setq op-filter `(lambda (op)
250 (string-match ,op-filter op)))))
252 (setq xlate 'identity))
253 (c-with-syntax-table (c-lang-const c-mode-syntax-table)
255 (mapcan (lambda (opgroup)
256 (when (if (symbolp (car opgroup))
257 (when (funcall opgroup-filter (car opgroup))
258 (setq opgroup (cdr opgroup))
262 (when (funcall op-filter op)
263 (let ((res (funcall xlate op)))
264 (if (listp res) res (list res)))))
270 ;;; Various mode specific values that aren't language related.
272 (c-lang-defconst c-mode-menu
273 ;; The definition for the mode menu. The menu title is prepended to
274 ;; this before it's fed to `easy-menu-define'.
275 t `(["Comment Out Region" comment-region
276 (c-fn-region-is-active-p)]
277 ["Uncomment Region" (comment-region (region-beginning)
279 (c-fn-region-is-active-p)]
280 ["Indent Expression" c-indent-exp
281 (memq (char-after) '(?\( ?\[ ?\{))]
282 ["Indent Line or Region" c-indent-line-or-region t]
283 ["Fill Comment Paragraph" c-fill-paragraph t]
285 ["Backward Statement" c-beginning-of-statement t]
286 ["Forward Statement" c-end-of-statement t]
287 ,@(when (c-lang-const c-opt-cpp-prefix)
288 ;; Only applicable if there's a cpp preprocessor.
289 `(["Up Conditional" c-up-conditional t]
290 ["Backward Conditional" c-backward-conditional t]
291 ["Forward Conditional" c-forward-conditional t]
293 ["Macro Expand Region" c-macro-expand
294 (c-fn-region-is-active-p)]
295 ["Backslashify" c-backslash-region
296 (c-fn-region-is-active-p)]))
299 ["Set Style..." c-set-style t]
300 ["Show Current Style Name" (message
304 ["Guess Style from this Buffer" c-guess-buffer-no-install t]
305 ["Install the Last Guessed Style..." c-guess-install
306 (and c-guess-guessed-offsets-alist
307 c-guess-guessed-basic-offset) ]
308 ["View the Last Guessed Style" c-guess-view
309 (and c-guess-guessed-offsets-alist
310 c-guess-guessed-basic-offset) ])
313 ["Syntactic indentation" c-toggle-syntactic-indentation
314 :style toggle :selected c-syntactic-indentation]
315 ["Electric mode" c-toggle-electric-state
316 :style toggle :selected c-electric-flag]
317 ["Auto newline" c-toggle-auto-newline
318 :style toggle :selected c-auto-newline]
319 ["Hungry delete" c-toggle-hungry-state
320 :style toggle :selected c-hungry-delete-key]
321 ["Subword mode" subword-mode
322 :style toggle :selected (and (boundp 'subword-mode)
328 (defun c-populate-syntax-table (table)
329 "Populate the given syntax table as necessary for a C-like language.
330 This includes setting ' and \" as string delimiters, and setting up
331 the comment syntax to handle both line style \"//\" and block style
332 \"/*\" \"*/\" comments."
334 (modify-syntax-entry ?_ "_" table)
335 (modify-syntax-entry ?\\ "\\" table)
336 (modify-syntax-entry ?+ "." table)
337 (modify-syntax-entry ?- "." table)
338 (modify-syntax-entry ?= "." table)
339 (modify-syntax-entry ?% "." table)
340 (modify-syntax-entry ?< "." table)
341 (modify-syntax-entry ?> "." table)
342 (modify-syntax-entry ?& "." table)
343 (modify-syntax-entry ?| "." table)
344 (modify-syntax-entry ?\' "\"" table)
345 (modify-syntax-entry ?\240 "." table)
347 ;; Set up block and line oriented comments. The new C
348 ;; standard mandates both comment styles even in C, so since
349 ;; all languages now require dual comments, we make this the
353 ((memq '8-bit c-emacs-features)
354 (modify-syntax-entry ?/ ". 1456" table)
355 (modify-syntax-entry ?* ". 23" table))
357 ((memq '1-bit c-emacs-features)
358 (modify-syntax-entry ?/ ". 124b" table)
359 (modify-syntax-entry ?* ". 23" table))
361 (t (error "CC Mode is incompatible with this version of Emacs")))
363 (modify-syntax-entry ?\n "> b" table)
364 ;; Give CR the same syntax as newline, for selective-display
365 (modify-syntax-entry ?\^m "> b" table))
367 (c-lang-defconst c-make-mode-syntax-table
368 "Functions that generates the mode specific syntax tables.
369 The syntax tables aren't stored directly since they're quite large."
371 (let ((table (make-syntax-table)))
372 (c-populate-syntax-table table)
373 ;; Mode specific syntaxes.
374 ,(cond ((or (c-major-mode-is 'objc-mode) (c-major-mode-is 'java-mode))
375 ;; Let '@' be part of symbols in ObjC to cope with
376 ;; its compiler directives as single keyword tokens.
377 ;; This is then necessary since it's assumed that
378 ;; every keyword is a single symbol.
379 `(modify-syntax-entry ?@ "_" table))
380 ((c-major-mode-is 'pike-mode)
381 `(modify-syntax-entry ?@ "." table)))
384 (c-lang-defconst c-mode-syntax-table
385 ;; The syntax tables in evaluated form. Only used temporarily when
386 ;; the constants in this file are evaluated.
387 t (funcall (c-lang-const c-make-mode-syntax-table)))
389 (c-lang-defconst c++-make-template-syntax-table
390 ;; A variant of `c++-mode-syntax-table' that defines `<' and `>' as
391 ;; parenthesis characters. Used temporarily when template argument
392 ;; lists are parsed. Note that this encourages incorrect parsing of
393 ;; templates since they might contain normal operators that uses the
394 ;; '<' and '>' characters. Therefore this syntax table might go
395 ;; away when CC Mode handles templates correctly everywhere. WHILE
396 ;; THIS SYNTAX TABLE IS CURRENT, `c-parse-state' MUST _NOT_ BE
399 (java c++) `(lambda ()
400 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
401 (modify-syntax-entry ?< "(>" table)
402 (modify-syntax-entry ?> ")<" table)
404 (c-lang-defvar c++-template-syntax-table
405 (and (c-lang-const c++-make-template-syntax-table)
406 (funcall (c-lang-const c++-make-template-syntax-table))))
408 (c-lang-defconst c-make-no-parens-syntax-table
409 ;; A variant of the standard syntax table which is used to find matching
410 ;; "<"s and ">"s which have been marked as parens using syntax table
411 ;; properties. The other paren characters (e.g. "{", ")" "]") are given a
412 ;; non-paren syntax here. so that the list commands will work on "< ... >"
413 ;; even when there's unbalanced other parens inside them.
415 ;; This variable is nil for languages which don't have template stuff.
416 t (if (c-lang-const c-recognize-<>-arglists)
418 ;(if (c-lang-const c-recognize-<>-arglists)
419 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
420 (modify-syntax-entry ?\( "." table)
421 (modify-syntax-entry ?\) "." table)
422 (modify-syntax-entry ?\[ "." table)
423 (modify-syntax-entry ?\] "." table)
424 (modify-syntax-entry ?\{ "." table)
425 (modify-syntax-entry ?\} "." table)
427 (c-lang-defvar c-no-parens-syntax-table
428 (and (c-lang-const c-make-no-parens-syntax-table)
429 (funcall (c-lang-const c-make-no-parens-syntax-table))))
431 (c-lang-defconst c-identifier-syntax-modifications
432 "A list that describes the modifications that should be done to the
433 mode syntax table to get a syntax table that matches all identifiers
434 and keywords as words.
436 The list is just like the one used in `font-lock-defaults': Each
437 element is a cons where the car is the character to modify and the cdr
438 the new syntax, as accepted by `modify-syntax-entry'."
439 ;; The $ character is not allowed in most languages (one exception
440 ;; is Java which allows it for legacy reasons) but we still classify
441 ;; it as an identifier character since it's often used in various
442 ;; machine generated identifiers.
443 t '((?_ . "w") (?$ . "w"))
444 (objc java) (append '((?@ . "w"))
445 (c-lang-const c-identifier-syntax-modifications))
447 (c-lang-defvar c-identifier-syntax-modifications
448 (c-lang-const c-identifier-syntax-modifications))
450 (c-lang-defvar c-identifier-syntax-table
451 (let ((table (copy-syntax-table (c-mode-var "mode-syntax-table")))
452 (mods c-identifier-syntax-modifications)
457 (modify-syntax-entry (car mod) (cdr mod) table))
459 "Syntax table built on the mode syntax table but additionally
460 classifies symbol constituents like '_' and '$' as word constituents,
461 so that all identifiers are recognized as words.")
463 (c-lang-defconst c-get-state-before-change-functions
464 ;; For documentation see the following c-lang-defvar of the same name.
465 ;; The value here may be a list of functions or a single function.
467 c++ '(c-extend-region-for-CPP
468 c-before-change-check-<>-operators
469 c-invalidate-macro-cache)
470 (c objc) '(c-extend-region-for-CPP c-invalidate-macro-cache)
471 ;; java 'c-before-change-check-<>-operators
472 awk 'c-awk-record-region-clear-NL)
473 (c-lang-defvar c-get-state-before-change-functions
474 (let ((fs (c-lang-const c-get-state-before-change-functions)))
478 "If non-nil, a list of functions called from c-before-change-hook.
479 Typically these will record enough state to allow
480 `c-before-font-lock-function' to extend the region to fontify,
481 and may do such things as removing text-properties which must be
484 These functions will be run in the order given. Each of them
485 takes 2 parameters, the BEG and END supplied to every
486 before-change function; on entry, the buffer will have been
487 widened and match-data will have been saved; point is undefined
488 on both entry and exit; the return value is ignored.
490 The functions are called even when font locking isn't enabled.
492 When the mode is initialized, the functions are called with
493 parameters \(point-min) and \(point-max).")
495 (c-lang-defconst c-before-font-lock-functions
496 ;; For documentation see the following c-lang-defvar of the same name.
497 ;; The value here may be a list of functions or a single function.
498 t 'c-change-set-fl-decl-start
499 (c c++ objc) '(c-neutralize-syntax-in-and-mark-CPP
500 c-change-set-fl-decl-start)
501 awk 'c-awk-extend-and-syntax-tablify-region)
502 (c-lang-defvar c-before-font-lock-functions
503 (let ((fs (c-lang-const c-before-font-lock-functions)))
507 "If non-nil, a list of functions called just before font locking.
508 Typically they will extend the region about to be fontified \(see
509 below) and will set `syntax-table' text properties on the region.
511 These functions will be run in the order given. Each of them
512 takes 3 parameters, the BEG, END, and OLD-LEN supplied to every
513 after-change function; point is undefined on both entry and exit;
514 on entry, the buffer will have been widened and match-data will
515 have been saved; the return value is ignored.
517 The functions may extend the region to be fontified by setting the
518 buffer local variables c-new-BEG and c-new-END.
520 The functions are called even when font locking is disabled.
522 When the mode is initialized, these functions are called with
523 parameters \(point-min), \(point-max) and <buffer size>.")
525 (c-lang-defconst c-before-context-fontification-functions
527 t 'c-context-set-fl-decl-start)
528 ;; For documentation see the following c-lang-defvar of the same name.
529 ;; The value here may be a list of functions or a single function.
530 (c-lang-defvar c-before-context-fontification-functions
531 (let ((fs (c-lang-const c-before-context-fontification-functions)))
535 "If non-nil, a list of functions called just before context (or
536 other non-change) fontification is done. Typically they will
539 These functions will be run in the order given. Each of them
540 takes 2 parameters, the BEG and END of the region to be
541 fontified. Point is undefined on both entry and exit. On entry,
542 the buffer will have been widened and match-data will have been
543 saved; the return value is a cons of the adjusted
544 region, (NEW-BEG . NEW-END).")
547 ;;; Syntactic analysis ("virtual semicolons") for line-oriented languages (AWK).
548 (c-lang-defconst c-at-vsemi-p-fn
549 "Contains a function \"Is there a virtual semicolon at POS or point?\".
550 Such a function takes one optional parameter, a buffer position (defaults to
551 point), and returns nil or t. This variable contains nil for languages which
552 don't have EOL terminated statements. "
554 (c c++ objc) 'c-at-macro-vsemi-p
555 awk 'c-awk-at-vsemi-p)
556 (c-lang-defvar c-at-vsemi-p-fn (c-lang-const c-at-vsemi-p-fn))
558 (c-lang-defconst c-vsemi-status-unknown-p-fn
559 "Contains a function \"are we unsure whether there is a virtual semicolon on this line?\".
560 The (admittedly kludgy) purpose of such a function is to prevent an infinite
561 recursion in c-beginning-of-statement-1 when point starts at a `while' token.
562 The function MUST NOT UNDER ANY CIRCUMSTANCES call c-beginning-of-statement-1,
563 even indirectly. This variable contains nil for languages which don't have
564 EOL terminated statements."
566 (c c++ objc) 'c-macro-vsemi-status-unknown-p
567 awk 'c-awk-vsemi-status-unknown-p)
568 (c-lang-defvar c-vsemi-status-unknown-p-fn
569 (c-lang-const c-vsemi-status-unknown-p-fn))
572 ;;; Lexer-level syntax (identifiers, tokens etc).
574 (c-lang-defconst c-has-bitfields
575 "Whether the language has bitfield declarations."
578 (c-lang-defvar c-has-bitfields (c-lang-const c-has-bitfields))
580 (c-lang-defconst c-symbol-start
581 "Regexp that matches the start of a symbol, i.e. any identifier or
582 keyword. It's unspecified how far it matches. Does not contain a \\|
583 operator at the top level."
584 t (concat "[" c-alpha "_]")
585 java (concat "[" c-alpha "_@]")
586 objc (concat "[" c-alpha "_@]")
587 pike (concat "[" c-alpha "_`]"))
588 (c-lang-defvar c-symbol-start (c-lang-const c-symbol-start))
590 (c-lang-defconst c-symbol-chars
591 "Set of characters that can be part of a symbol.
592 This is of the form that fits inside [ ] in a regexp."
593 ;; Pike note: With the backquote identifiers this would include most
594 ;; operator chars too, but they are handled with other means instead.
595 t (concat c-alnum "_$")
596 objc (concat c-alnum "_$@"))
597 (c-lang-defvar c-symbol-chars (c-lang-const c-symbol-chars))
599 (c-lang-defconst c-symbol-key
600 "Regexp matching identifiers and keywords (with submatch 0). Assumed
601 to match if `c-symbol-start' matches on the same position."
602 t (concat (c-lang-const c-symbol-start)
603 "[" (c-lang-const c-symbol-chars) "]*")
605 ;; Use the value from C here since the operator backquote is
606 ;; covered by the other alternative.
607 (c-lang-const c-symbol-key c)
609 (c-make-keywords-re nil
610 (c-lang-const c-overloadable-operators))))
611 (c-lang-defvar c-symbol-key (c-lang-const c-symbol-key))
613 (c-lang-defconst c-symbol-key-depth
614 ;; Number of regexp grouping parens in `c-symbol-key'.
615 t (regexp-opt-depth (c-lang-const c-symbol-key)))
617 (c-lang-defconst c-nonsymbol-chars
618 "This is the set of chars that can't be part of a symbol, i.e. the
619 negation of `c-symbol-chars'."
620 t (concat "^" (c-lang-const c-symbol-chars)))
621 (c-lang-defvar c-nonsymbol-chars (c-lang-const c-nonsymbol-chars))
623 (c-lang-defconst c-nonsymbol-key
624 "Regexp that matches any character that can't be part of a symbol.
625 It's usually appended to other regexps to avoid matching a prefix.
626 It's assumed to not contain any submatchers."
627 ;; The same thing regarding Unicode identifiers applies here as to
629 t (concat "[" (c-lang-const c-nonsymbol-chars) "]"))
631 (c-lang-defconst c-identifier-ops
632 "The operators that make up fully qualified identifiers. nil in
633 languages that don't have such things. See `c-operators' for a
634 description of the format. Binary operators can concatenate symbols,
635 e.g. \"::\" in \"A::B::C\". Prefix operators can precede identifiers,
636 e.g. \"~\" in \"~A::B\". Other types of operators aren't supported.
638 This value is by default merged into `c-operators'."
640 c++ '((prefix "~" "??-" "compl")
643 ;; Java has "." to concatenate identifiers but it's also used for
644 ;; normal indexing. There's special code in the Java font lock
645 ;; rules to fontify qualified identifiers based on the standard
646 ;; naming conventions. We still define "." here to make
647 ;; `c-forward-name' move over as long names as possible which is
648 ;; necessary to e.g. handle throws clauses correctly.
649 java '((left-assoc "."))
650 idl '((left-assoc "::")
652 pike '((left-assoc "::")
656 (c-lang-defconst c-opt-identifier-concat-key
657 ;; Appendable adorned regexp matching the operators that join
658 ;; symbols to fully qualified identifiers, or nil in languages that
659 ;; don't have such things.
661 ;; This was a docstring constant in 5.30. It still works but is now
662 ;; considered internal - change `c-identifier-ops' instead.
663 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
664 '(left-assoc right-assoc)
667 (c-make-keywords-re 'appendable ops))))
668 (c-lang-defvar c-opt-identifier-concat-key
669 (c-lang-const c-opt-identifier-concat-key)
672 (c-lang-defconst c-opt-identifier-concat-key-depth
673 ;; Number of regexp grouping parens in `c-opt-identifier-concat-key'.
674 t (regexp-opt-depth (c-lang-const c-opt-identifier-concat-key)))
676 (c-lang-defconst c-opt-identifier-prefix-key
677 ;; Appendable adorned regexp matching operators that might precede
678 ;; an identifier and that are part of the identifier in that case.
679 ;; nil in languages without such things.
680 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
684 (c-make-keywords-re 'appendable ops))))
686 (c-lang-defconst c-after-id-concat-ops
687 "Operators that can occur after a binary operator on `c-identifier-ops'
688 in identifiers. nil in languages that don't have such things.
690 Operators here should also have appropriate entries in `c-operators' -
691 it's not taken care of by default."
693 ;; '~' for destructors in C++, '*' for member pointers.
695 ;; In Java we recognize '*' to deal with "foo.bar.*" that can occur
696 ;; in import declarations. (This will also match bogus things like
697 ;; "foo.*bar" but we don't bother.)
700 (c-lang-defconst c-opt-after-id-concat-key
701 ;; Regexp that must match the token after
702 ;; `c-opt-identifier-concat-key' for it to be considered an
703 ;; identifier concatenation operator (which e.g. causes the
704 ;; preceding identifier to be fontified as a reference). Assumed to
705 ;; be a string if `c-opt-identifier-concat-key' is.
707 ;; This was a docstring constant in 5.30. It still works but is now
708 ;; considered internal - change `c-after-id-concat-ops' instead.
709 t (concat (c-lang-const c-symbol-start)
710 (if (c-lang-const c-after-id-concat-ops)
711 (concat "\\|" (c-make-keywords-re 'appendable
712 (c-lang-const c-after-id-concat-ops)))
715 (c-lang-defconst c-identifier-start
716 "Regexp that matches the start of an (optionally qualified) identifier.
717 It should also match all keywords. It's unspecified how far it
719 t (concat (c-lang-const c-symbol-start)
720 (if (c-lang-const c-opt-identifier-prefix-key)
722 (c-lang-const c-opt-identifier-prefix-key))
724 (c-lang-defvar c-identifier-start (c-lang-const c-identifier-start))
726 (c-lang-defconst c-identifier-key
727 "Regexp matching a fully qualified identifier, like \"A::B::c\" in
728 C++. It does not recognize the full range of syntactic whitespace
729 between the tokens; `c-forward-name' has to be used for that. It
730 should also not match identifiers containing parenthesis groupings,
731 e.g. identifiers with template arguments such as \"A<X,Y>\" in C++."
732 ;; This regexp is more complex than strictly necessary to ensure
733 ;; that it can be matched with a minimum of backtracking.
734 t (concat (if (c-lang-const c-opt-identifier-prefix-key)
737 (c-lang-const c-opt-identifier-prefix-key)
738 (c-lang-const c-simple-ws) "*"
741 "\\(" (c-lang-const c-symbol-key) "\\)"
742 (if (c-lang-const c-opt-identifier-concat-key)
745 (c-lang-const c-simple-ws) "*"
746 (c-lang-const c-opt-identifier-concat-key)
747 (c-lang-const c-simple-ws) "*"
748 (if (c-lang-const c-after-id-concat-ops)
751 (c-make-keywords-re 'appendable
752 (c-lang-const c-after-id-concat-ops))
754 ;; For flexibility, consider the symbol match
755 ;; optional if we've hit a
756 ;; `c-after-id-concat-ops' operator. This is
757 ;; also necessary to handle the "*" that can
758 ;; end import declaration identifiers in Java.
760 (c-lang-const c-simple-ws) "*"
761 "\\(" (c-lang-const c-symbol-key) "\\)"
764 "\\(" (c-lang-const c-symbol-key) "\\)"
766 (concat "\\(" (c-lang-const c-symbol-key) "\\)"))
769 (c-lang-defvar c-identifier-key (c-lang-const c-identifier-key))
771 (c-lang-defconst c-identifier-last-sym-match
772 ;; This was a docstring constant in 5.30 but it's no longer used.
773 ;; It's only kept to avoid breaking third party code.
775 ;; Used to identify the submatch in `c-identifier-key' that
776 ;; surrounds the last symbol in the qualified identifier. It's a
777 ;; list of submatch numbers, of which the first that has a match is
778 ;; taken. It's assumed that at least one does when the regexp has
782 (c-lang-defconst c-string-escaped-newlines
783 "Set if the language support backslash escaped newlines inside string
787 (c-lang-defvar c-string-escaped-newlines
788 (c-lang-const c-string-escaped-newlines))
790 (c-lang-defconst c-multiline-string-start-char
791 "Set if the language supports multiline string literals without escaped
792 newlines. If t, all string literals are multiline. If a character,
793 only literals where the open quote is immediately preceded by that
794 literal are multiline."
797 (c-lang-defvar c-multiline-string-start-char
798 (c-lang-const c-multiline-string-start-char))
800 (c-lang-defconst c-opt-cpp-symbol
801 "The symbol which starts preprocessor constructs when in the margin."
804 (c-lang-defvar c-opt-cpp-symbol (c-lang-const c-opt-cpp-symbol))
806 (c-lang-defconst c-opt-cpp-prefix
807 "Regexp matching the prefix of a cpp directive in the languages that
808 normally use that macro preprocessor. Tested at bol or at boi.
809 Assumed to not contain any submatches or \\| operators."
810 ;; TODO (ACM, 2005-04-01). Amend the following to recognize escaped NLs;
811 ;; amend all uses of c-opt-cpp-prefix which count regexp-depth.
814 (c-lang-defvar c-opt-cpp-prefix (c-lang-const c-opt-cpp-prefix))
816 (c-lang-defconst c-anchored-cpp-prefix
817 "Regexp matching the prefix of a cpp directive anchored to BOL,
818 in the languages that have a macro preprocessor."
819 t "^\\s *\\(#\\)\\s *"
821 (c-lang-defvar c-anchored-cpp-prefix (c-lang-const c-anchored-cpp-prefix))
823 (c-lang-defconst c-opt-cpp-start
824 "Regexp matching the prefix of a cpp directive including the directive
825 name, or nil in languages without preprocessor support. The first
826 submatch surrounds the directive name."
827 t (if (c-lang-const c-opt-cpp-prefix)
828 (concat (c-lang-const c-opt-cpp-prefix)
829 "\\([" c-alnum "]+\\)"))
830 ;; Pike, being a scripting language, recognizes hash-bangs too.
831 pike (concat (c-lang-const c-opt-cpp-prefix)
832 "\\([" c-alnum "]+\\|!\\)"))
833 (c-lang-defvar c-opt-cpp-start (c-lang-const c-opt-cpp-start))
835 (c-lang-defconst c-cpp-message-directives
836 "List of cpp directives (without the prefix) that are followed by a
838 t (if (c-lang-const c-opt-cpp-prefix)
840 (c c++ objc pike) '("error" "warning"))
842 (c-lang-defconst c-cpp-include-directives
843 "List of cpp directives (without the prefix) that are followed by a
844 file name in angle brackets or quotes."
845 t (if (c-lang-const c-opt-cpp-prefix)
847 objc '("include" "import"))
849 (c-lang-defconst c-opt-cpp-macro-define
850 "Cpp directive (without the prefix) that is followed by a macro
851 definition, or nil if the language doesn't have any."
852 t (if (c-lang-const c-opt-cpp-prefix)
854 (c-lang-defvar c-opt-cpp-macro-define
855 (c-lang-const c-opt-cpp-macro-define))
857 (c-lang-defconst c-opt-cpp-macro-define-start
858 ;; Regexp matching everything up to the macro body of a cpp define, or the
859 ;; end of the logical line if there is none. Submatch 1 is the name of the
860 ;; macro. Set if c-opt-cpp-macro-define is.
861 t (if (c-lang-const c-opt-cpp-macro-define)
862 (concat (c-lang-const c-opt-cpp-prefix)
863 (c-lang-const c-opt-cpp-macro-define)
864 "[ \t]+\\(\\(\\sw\\|_\\)+\\)\\(\([^\)]*\)\\)?"
866 "\\([ \t]\\|\\\\\n\\)*")))
867 (c-lang-defvar c-opt-cpp-macro-define-start
868 (c-lang-const c-opt-cpp-macro-define-start))
870 (c-lang-defconst c-opt-cpp-macro-define-id
871 ;; Regexp matching everything up to the end of the identifier defined
873 t (if (c-lang-const c-opt-cpp-macro-define)
874 (concat (c-lang-const c-opt-cpp-prefix) ; #
875 (c-lang-const c-opt-cpp-macro-define) ; define
876 "[ \t]+\\(\\sw\\|_\\)+")))
877 (c-lang-defvar c-opt-cpp-macro-define-id
878 (c-lang-const c-opt-cpp-macro-define-id))
880 (c-lang-defconst c-cpp-expr-directives
881 "List of cpp directives (without the prefix) that are followed by an
883 t (if (c-lang-const c-opt-cpp-prefix)
886 (c-lang-defconst c-cpp-expr-intro-re
887 "Regexp which matches the start of a CPP directive which contains an
888 expression, or nil if there aren't any in the language."
889 t (if (c-lang-const c-cpp-expr-directives)
891 (c-lang-const c-opt-cpp-prefix)
892 (c-make-keywords-re t (c-lang-const c-cpp-expr-directives)))))
893 (c-lang-defvar c-cpp-expr-intro-re
894 (c-lang-const c-cpp-expr-intro-re))
896 (c-lang-defconst c-cpp-expr-functions
897 "List of functions in cpp expressions."
898 t (if (c-lang-const c-opt-cpp-prefix)
900 pike '("defined" "efun" "constant"))
902 (c-lang-defconst c-assignment-operators
903 "List of all assignment operators."
904 t '("=" "*=" "/=" "%=" "+=" "-=" ">>=" "<<=" "&=" "^=" "|=")
905 java (append (c-lang-const c-assignment-operators)
907 c++ (append (c-lang-const c-assignment-operators)
908 '("and_eq" "or_eq" "xor_eq" "??!=" "??'="))
911 (c-lang-defconst c-operators
912 "List describing all operators, along with their precedence and
913 associativity. The order in the list corresponds to the precedence of
914 the operators: The operators in each element are a group with the same
915 precedence, and the group has higher precedence than the groups in all
916 following elements. The car of each element describes the type of the
917 operator group, and the cdr is a list of the operator tokens in it.
918 The operator group types are:
920 'prefix Unary prefix operators.
921 'postfix Unary postfix operators.
923 Unary postfix operators if and only if the chars have
925 'left-assoc Binary left associative operators (i.e. a+b+c means (a+b)+c).
926 'right-assoc Binary right associative operators (i.e. a=b=c means a=(b=c)).
927 'right-assoc-sequence
928 Right associative operator that constitutes of a
929 sequence of tokens that separate expressions. All the
930 tokens in the group are in this case taken as
931 describing the sequence in one such operator, and the
932 order between them is therefore significant.
934 Operators containing a character with paren syntax are taken to match
935 with a corresponding open/close paren somewhere else. A postfix
936 operator with close paren syntax is taken to end a postfix expression
937 started somewhere earlier, rather than start a new one at point. Vice
938 versa for prefix operators with open paren syntax.
940 Note that operators like \".\" and \"->\" which in language references
941 often are described as postfix operators are considered binary here,
942 since CC Mode treats every identifier as an expression."
944 ;; There's currently no code in CC Mode that exploits all the info
945 ;; in this variable; precedence, associativity etc are present as a
946 ;; preparation for future work.
948 ;; FIXME!!! C++11's "auto" operators "=" and "->" need to go in here
949 ;; somewhere. 2012-03-24.
952 ,@(when (c-lang-const c-opt-cpp-prefix)
954 ,@(when (c-major-mode-is '(c-mode c++-mode))
957 ,@(when (c-major-mode-is '(c-mode c++-mode))
958 '("%:%:" "??=??=")))))
961 ,@(c-lang-const c-identifier-ops)
962 ,@(cond ((or (c-major-mode-is 'c++-mode) (c-major-mode-is 'java-mode))
963 `((postfix-if-paren "<" ">"))) ; Templates.
964 ((c-major-mode-is 'pike-mode)
965 `((prefix "global" "predef")))
966 ((c-major-mode-is 'java-mode)
967 `((prefix "super"))))
970 ,@(when (c-major-mode-is 'c++-mode)
971 ;; The following need special treatment.
972 `((prefix "dynamic_cast" "static_cast"
973 "reinterpret_cast" "const_cast" "typeid"
976 ,@(unless (c-major-mode-is 'java-mode)
978 (postfix "++" "--" "[" "]" "(" ")"
979 ,@(when (c-major-mode-is '(c-mode c++-mode))
980 '("<:" ":>" "??(" "??)")))
983 (prefix "++" "--" "+" "-" "!" "~"
984 ,@(when (c-major-mode-is 'c++-mode) '("not" "compl"))
985 ,@(when (c-major-mode-is '(c-mode c++-mode))
986 '("*" "&" "sizeof" "??-"))
987 ,@(when (c-major-mode-is 'objc-mode)
988 '("@selector" "@protocol" "@encode"))
989 ;; The following need special treatment.
990 ,@(cond ((c-major-mode-is 'c++-mode)
992 ((c-major-mode-is 'java-mode)
994 ((c-major-mode-is 'pike-mode)
995 '("class" "lambda" "catch" "throw" "gauge")))
997 ,@(when (c-major-mode-is 'pike-mode)
998 '("[" "]"))) ; Type cast.
1000 ;; Member selection.
1001 ,@(when (c-major-mode-is 'c++-mode)
1002 `((left-assoc ".*" "->*")))
1005 (left-assoc "*" "/" "%")
1008 (left-assoc "+" "-")
1011 (left-assoc "<<" ">>"
1012 ,@(when (c-major-mode-is 'java-mode)
1016 (left-assoc "<" ">" "<=" ">="
1017 ,@(when (c-major-mode-is 'java-mode)
1021 (left-assoc "==" "!="
1022 ,@(when (c-major-mode-is 'c++-mode) '("not_eq")))
1026 ,@(when (c-major-mode-is 'c++-mode) '("bitand")))
1028 ;; Bitwise exclusive or.
1030 ,@(when (c-major-mode-is '(c-mode c++-mode))
1032 ,@(when (c-major-mode-is 'c++-mode) '("xor")))
1036 ,@(when (c-major-mode-is '(c-mode c++-mode))
1038 ,@(when (c-major-mode-is 'c++-mode) '("bitor")))
1042 ,@(when (c-major-mode-is 'c++-mode) '("and")))
1046 ,@(when (c-major-mode-is '(c-mode c++-mode))
1048 ,@(when (c-major-mode-is 'c++-mode) '("or")))
1051 (right-assoc-sequence "?" ":")
1054 (right-assoc ,@(c-lang-const c-assignment-operators))
1057 ,@(when (c-major-mode-is 'c++-mode)
1058 '((prefix "throw")))
1063 ;; IDL got its own definition since it has a much smaller operator
1064 ;; set than the other languages.
1065 idl `(;; Preprocessor.
1069 ,@(c-lang-const c-identifier-ops)
1071 (prefix "+" "-" "~")
1073 (left-assoc "*" "/" "%")
1075 (left-assoc "+" "-")
1077 (left-assoc "<<" ">>")
1085 (c-lang-defconst c-operator-list
1086 ;; The operators as a flat list (without duplicates).
1087 t (c-filter-ops (c-lang-const c-operators) t t))
1089 (c-lang-defconst c-overloadable-operators
1090 "List of the operators that are overloadable, in their \"identifier
1091 form\". See also `c-op-identifier-prefix'."
1093 c++ '("new" "delete" ;; Can be followed by "[]" but we ignore that.
1095 "^" "??'" "xor" "&" "bitand" "|" "??!" "bitor" "~" "??-" "compl"
1096 "!" "=" "<" ">" "+=" "-=" "*=" "/=" "%=" "^="
1097 "??'=" "xor_eq" "&=" "and_eq" "|=" "??!=" "or_eq"
1098 "<<" ">>" ">>=" "<<=" "==" "!=" "not_eq" "<=" ">="
1099 "&&" "and" "||" "??!??!" "or" "++" "--" "," "->*" "->"
1100 "()" "[]" "<::>" "??(??)")
1101 ;; These work like identifiers in Pike.
1102 pike '("`+" "`-" "`&" "`|" "`^" "`<<" "`>>" "`*" "`/" "`%" "`~"
1103 "`==" "`<" "`>" "`!" "`[]" "`[]=" "`->" "`->=" "`()" "``+"
1104 "``-" "``&" "``|" "``^" "``<<" "``>>" "``*" "``/" "``%"
1107 (c-lang-defconst c-overloadable-operators-regexp
1108 ;; Regexp tested after an "operator" token in C++.
1110 c++ (c-make-keywords-re nil (c-lang-const c-overloadable-operators)))
1111 (c-lang-defvar c-overloadable-operators-regexp
1112 (c-lang-const c-overloadable-operators-regexp))
1114 (c-lang-defconst c-opt-op-identifier-prefix
1115 "Regexp matching the token before the ones in
1116 `c-overloadable-operators' when operators are specified in their
1117 \"identifier form\". This typically matches \"operator\" in C++ where
1118 operator functions are specified as e.g. \"operator +\". It's nil in
1119 languages without operator functions or where the complete operator
1120 identifier is listed in `c-overloadable-operators'.
1122 This regexp is assumed to not match any non-operator identifier."
1124 c++ (c-make-keywords-re t '("operator")))
1125 (c-lang-defvar c-opt-op-identifier-prefix
1126 (c-lang-const c-opt-op-identifier-prefix))
1128 ;; Note: the following alias is an old name which was a mis-spelling. It has
1129 ;; been corrected above and throughout cc-engine.el. It will be removed at
1130 ;; some release very shortly in the future. ACM, 2006-04-14.
1131 (defvaralias 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix)
1132 (make-obsolete-variable 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix
1133 "CC Mode 5.31.4, 2006-04-14")
1135 (c-lang-defconst c-other-op-syntax-tokens
1136 "List of the tokens made up of characters in the punctuation or
1137 parenthesis syntax classes that have uses other than as expression
1139 t '("{" "}" "(" ")" "[" "]" ";" ":" "," "=" "/*" "*/" "//")
1140 (c c++ pike) (append '("#" "##" ; Used by cpp.
1142 (c-lang-const c-other-op-syntax-tokens))
1143 (c c++) (append '("*") (c-lang-const c-other-op-syntax-tokens))
1144 c++ (append '("&" "<%" "%>" "<:" ":>" "%:" "%:%:")
1145 (c-lang-const c-other-op-syntax-tokens))
1146 objc (append '("#" "##" ; Used by cpp.
1147 "+" "-") (c-lang-const c-other-op-syntax-tokens))
1148 idl (append '("#" "##") ; Used by cpp.
1149 (c-lang-const c-other-op-syntax-tokens))
1150 pike (append '("..")
1151 (c-lang-const c-other-op-syntax-tokens)
1152 (c-lang-const c-overloadable-operators))
1153 awk '("{" "}" "(" ")" "[" "]" ";" "," "=" "/"))
1155 (c-lang-defconst c-all-op-syntax-tokens
1156 ;; List of all tokens in the punctuation and parenthesis syntax
1158 t (delete-duplicates (append (c-lang-const c-other-op-syntax-tokens)
1159 (c-lang-const c-operator-list))
1160 :test 'string-equal))
1162 (c-lang-defconst c-nonsymbol-token-char-list
1163 ;; List containing all chars not in the word, symbol or
1164 ;; syntactically irrelevant syntax classes, i.e. all punctuation,
1165 ;; parenthesis and string delimiter chars.
1166 t (c-with-syntax-table (c-lang-const c-mode-syntax-table)
1167 ;; Only go through the chars in the printable ASCII range. No
1168 ;; language so far has 8-bit or widestring operators.
1169 (let (list (char 32))
1171 (or (memq (char-syntax char) '(?w ?_ ?< ?> ?\ ))
1172 (setq list (cons (c-int-to-char char) list)))
1173 (setq char (1+ char)))
1176 (c-lang-defconst c-nonsymbol-token-regexp
1177 ;; Regexp matching all tokens in the punctuation and parenthesis
1178 ;; syntax classes. Note that this also matches ".", which can start
1180 t (c-make-keywords-re nil
1181 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1183 "\\`\\(\\s.\\|\\s\(\\|\\s\)\\)+\\'")))
1184 (c-lang-defvar c-nonsymbol-token-regexp
1185 (c-lang-const c-nonsymbol-token-regexp))
1187 (c-lang-defconst c-assignment-op-regexp
1188 ;; Regexp matching all assignment operators and only them. The
1189 ;; beginning of the first submatch is used to detect the end of the
1190 ;; token, along with the end of the whole match.
1191 t (if (c-lang-const c-assignment-operators)
1193 ;; Need special case for "=" since it's a prefix of "==".
1196 (c-make-keywords-re nil
1197 (set-difference (c-lang-const c-assignment-operators)
1199 :test 'string-equal)))
1201 (c-lang-defvar c-assignment-op-regexp
1202 (c-lang-const c-assignment-op-regexp))
1204 (c-lang-defconst c-<>-multichar-token-regexp
1205 ;; Regexp matching all tokens containing "<" or ">" which are longer
1207 t (c-make-keywords-re nil
1208 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1211 (c-lang-defvar c-<>-multichar-token-regexp
1212 (c-lang-const c-<>-multichar-token-regexp))
1214 (c-lang-defconst c-<-op-cont-regexp
1215 ;; Regexp matching the second and subsequent characters of all
1216 ;; multicharacter tokens that begin with "<".
1217 t (c-make-keywords-re nil
1218 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1221 (lambda (op) (substring op 1)))))
1223 (c-lang-defvar c-<-op-cont-regexp (c-lang-const c-<-op-cont-regexp))
1225 (c-lang-defconst c->-op-cont-tokens
1226 ;; A list of second and subsequent characters of all multicharacter tokens
1227 ;; that begin with ">".
1228 t (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1231 (lambda (op) (substring op 1)))
1232 java (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1234 "\\`>[^>]\\|\\`>>[^>]"
1235 (lambda (op) (substring op 1))))
1237 (c-lang-defconst c->-op-cont-regexp
1238 ;; Regexp matching the second and subsequent characters of all
1239 ;; multicharacter tokens that begin with ">".
1240 t (c-make-keywords-re nil (c-lang-const c->-op-cont-tokens)))
1242 (c-lang-defvar c->-op-cont-regexp (c-lang-const c->-op-cont-regexp))
1244 (c-lang-defconst c->-op-without->-cont-regexp
1245 ;; Regexp matching the second and subsequent characters of all
1246 ;; multicharacter tokens that begin with ">" except for those beginning with
1248 t (c-make-keywords-re nil
1250 (c-lang-const c->-op-cont-tokens)
1251 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1254 (lambda (op) (substring op 1)))
1255 :test 'string-equal)))
1257 (c-lang-defvar c->-op-without->-cont-regexp
1258 (c-lang-const c->-op-without->-cont-regexp))
1260 (c-lang-defconst c-stmt-delim-chars
1261 ;; The characters that should be considered to bound statements. To
1262 ;; optimize `c-crosses-statement-barrier-p' somewhat, it's assumed to
1263 ;; begin with "^" to negate the set. If ? : operators should be
1264 ;; detected then the string must end with "?:".
1266 (c-lang-defvar c-stmt-delim-chars (c-lang-const c-stmt-delim-chars))
1268 (c-lang-defconst c-stmt-delim-chars-with-comma
1269 ;; Variant of `c-stmt-delim-chars' that additionally contains ','.
1271 (c-lang-defvar c-stmt-delim-chars-with-comma
1272 (c-lang-const c-stmt-delim-chars-with-comma))
1274 (c-lang-defconst c-auto-ops
1275 ;; Ops which signal C++11's new auto uses.
1278 (c-lang-defconst c-auto-ops-re
1279 t (c-make-keywords-re nil (c-lang-const c-auto-ops)))
1280 (c-lang-defvar c-auto-ops-re (c-lang-const c-auto-ops-re))
1282 (c-lang-defconst c-haskell-op
1283 ;; Op used in the new C++11 auto function definition, indicating type.
1286 (c-lang-defconst c-haskell-op-re
1287 t (c-make-keywords-re nil (c-lang-const c-haskell-op)))
1288 (c-lang-defvar c-haskell-op-re (c-lang-const c-haskell-op-re))
1290 ;;; Syntactic whitespace.
1292 (c-lang-defconst c-simple-ws
1293 "Regexp matching an ordinary whitespace character.
1294 Does not contain a \\| operator at the top level."
1295 ;; "\\s " is not enough since it doesn't match line breaks.
1296 t "\\(\\s \\|[\n\r]\\)")
1298 (c-lang-defconst c-simple-ws-depth
1299 ;; Number of regexp grouping parens in `c-simple-ws'.
1300 t (regexp-opt-depth (c-lang-const c-simple-ws)))
1302 (c-lang-defconst c-line-comment-starter
1303 "String that starts line comments, or nil if such don't exist.
1304 Line comments are always terminated by newlines. At least one of
1305 `c-block-comment-starter' and this one is assumed to be set.
1307 Note that it's currently not enough to set this to support a new
1308 comment style. Other stuff like the syntax table must also be set up
1312 (c-lang-defvar c-line-comment-starter (c-lang-const c-line-comment-starter))
1314 (c-lang-defconst c-block-comment-starter
1315 "String that starts block comments, or nil if such don't exist.
1316 Block comments are ended by `c-block-comment-ender', which is assumed
1317 to be set if this is. At least one of `c-line-comment-starter' and
1318 this one is assumed to be set.
1320 Note that it's currently not enough to set this to support a new
1321 comment style. Other stuff like the syntax table must also be set up
1326 (c-lang-defconst c-block-comment-ender
1327 "String that ends block comments, or nil if such don't exist.
1329 Note that it's currently not enough to set this to support a new
1330 comment style. Other stuff like the syntax table must also be set up
1335 (c-lang-defconst c-comment-start-regexp
1336 ;; Regexp to match the start of any type of comment.
1337 t (let ((re (c-make-keywords-re nil
1338 (list (c-lang-const c-line-comment-starter)
1339 (c-lang-const c-block-comment-starter)))))
1340 (if (memq 'gen-comment-delim c-emacs-features)
1341 (concat re "\\|\\s!")
1343 (c-lang-defvar c-comment-start-regexp (c-lang-const c-comment-start-regexp))
1345 (c-lang-defconst c-block-comment-start-regexp
1346 ;; Regexp which matches the start of a block comment (if such exists in the
1348 t (if (c-lang-const c-block-comment-starter)
1349 (regexp-quote (c-lang-const c-block-comment-starter))
1351 (c-lang-defvar c-block-comment-start-regexp
1352 (c-lang-const c-block-comment-start-regexp))
1354 (c-lang-defconst c-line-comment-start-regexp
1355 ;; Regexp which matches the start of a line comment (if such exists in the
1356 ;; language; it does in all 7 CC Mode languages).
1357 t (if (c-lang-const c-line-comment-starter)
1358 (regexp-quote (c-lang-const c-line-comment-starter))
1360 (c-lang-defvar c-line-comment-start-regexp
1361 (c-lang-const c-line-comment-start-regexp))
1363 (c-lang-defconst c-literal-start-regexp
1364 ;; Regexp to match the start of comments and string literals.
1365 t (concat (c-lang-const c-comment-start-regexp)
1367 (if (memq 'gen-string-delim c-emacs-features)
1370 (c-lang-defvar c-literal-start-regexp (c-lang-const c-literal-start-regexp))
1372 (c-lang-defconst c-doc-comment-start-regexp
1373 "Regexp to match the start of documentation comments."
1375 ;; From font-lock.el: `doxygen' uses /*! while others use /**.
1376 (c c++ objc) "/\\*[*!]"
1379 (c-lang-defvar c-doc-comment-start-regexp
1380 (c-lang-const c-doc-comment-start-regexp))
1382 (c-lang-defconst comment-start
1383 "String that starts comments inserted with M-; etc.
1384 `comment-start' is initialized from this."
1385 ;; Default: Prefer line comments to block comments, and pad with a space.
1386 t (concat (or (c-lang-const c-line-comment-starter)
1387 (c-lang-const c-block-comment-starter))
1389 ;; In C we still default to the block comment style since line
1390 ;; comments aren't entirely portable.
1392 (c-lang-setvar comment-start (c-lang-const comment-start))
1394 (c-lang-defconst comment-end
1395 "String that ends comments inserted with M-; etc.
1396 `comment-end' is initialized from this."
1397 ;; Default: Use block comment style if comment-start uses block
1398 ;; comments, and pad with a space in that case.
1399 t (if (string-match (concat "\\`\\("
1400 (c-lang-const c-block-comment-start-regexp)
1402 (c-lang-const comment-start))
1403 (concat " " (c-lang-const c-block-comment-ender))
1405 (c-lang-setvar comment-end (c-lang-const comment-end))
1407 (c-lang-defconst comment-start-skip
1408 "Regexp to match the start of a comment plus everything up to its body.
1409 `comment-start-skip' is initialized from this."
1410 ;; Default: Allow the last char of the comment starter(s) to be
1411 ;; repeated, then allow any amount of horizontal whitespace.
1414 (mapcar (lambda (cs)
1416 (concat (regexp-quote cs) "+")))
1417 (list (c-lang-const c-line-comment-starter)
1418 (c-lang-const c-block-comment-starter)))
1421 (c-lang-setvar comment-start-skip (c-lang-const comment-start-skip))
1423 (c-lang-defconst c-syntactic-ws-start
1424 ;; Regexp matching any sequence that can start syntactic whitespace.
1425 ;; The only uncertain case is '#' when there are cpp directives.
1427 (c-make-keywords-re nil
1428 (append (list (c-lang-const c-line-comment-starter)
1429 (c-lang-const c-block-comment-starter)
1430 (when (c-lang-const c-opt-cpp-prefix)
1434 (when (memq 'gen-comment-delim c-emacs-features)
1436 (c-lang-defvar c-syntactic-ws-start (c-lang-const c-syntactic-ws-start))
1438 (c-lang-defconst c-syntactic-ws-end
1439 ;; Regexp matching any single character that might end syntactic whitespace.
1441 (c-make-keywords-re nil
1442 (append (when (c-lang-const c-block-comment-ender)
1445 (elt (c-lang-const c-block-comment-ender)
1447 (c-lang-const c-block-comment-ender)))))))
1449 (when (memq 'gen-comment-delim c-emacs-features)
1451 (c-lang-defvar c-syntactic-ws-end (c-lang-const c-syntactic-ws-end))
1453 (c-lang-defconst c-unterminated-block-comment-regexp
1454 ;; Regexp matching an unterminated block comment that doesn't
1455 ;; contain line breaks, or nil in languages without block comments.
1456 ;; Does not contain a \| operator at the top level.
1457 t (when (c-lang-const c-block-comment-starter)
1459 (regexp-quote (c-lang-const c-block-comment-starter))
1460 ;; It's messy to cook together a regexp that matches anything
1461 ;; but c-block-comment-ender.
1462 (let ((end (c-lang-const c-block-comment-ender)))
1463 (cond ((= (length end) 1)
1464 (concat "[^" end "\n\r]*"))
1466 (concat "[^" (substring end 0 1) "\n\r]*"
1468 (regexp-quote (substring end 0 1)) "+"
1470 ;; The quoting rules inside char classes are silly. :P
1471 (cond ((= (elt end 0) (elt end 1))
1472 (concat (substring end 0 1) "\n\r"))
1473 ((= (elt end 1) ?\])
1474 (concat (substring end 1 2) "\n\r"
1475 (substring end 0 1)))
1477 (concat (substring end 0 1) "\n\r"
1478 (substring end 1 2))))
1480 "[^" (substring end 0 1) "\n\r]*"
1483 (error "Can't handle a block comment ender of length %s"
1486 (c-lang-defconst c-block-comment-regexp
1487 ;; Regexp matching a block comment that doesn't contain line breaks,
1488 ;; or nil in languages without block comments. The reason we don't
1489 ;; allow line breaks is to avoid going very far and risk running out
1490 ;; of regexp stack; this regexp is intended to handle only short
1491 ;; comments that might be put in the middle of limited constructs
1492 ;; like declarations. Does not contain a \| operator at the top
1494 t (when (c-lang-const c-unterminated-block-comment-regexp)
1496 (c-lang-const c-unterminated-block-comment-regexp)
1497 (let ((end (c-lang-const c-block-comment-ender)))
1498 (cond ((= (length end) 1)
1501 (concat (regexp-quote (substring end 0 1)) "+"
1502 (regexp-quote (substring end 1 2))))
1504 (error "Can't handle a block comment ender of length %s"
1507 (c-lang-defconst c-nonwhite-syntactic-ws
1508 ;; Regexp matching a piece of syntactic whitespace that isn't a
1509 ;; sequence of simple whitespace characters. As opposed to
1510 ;; `c-(forward|backward)-syntactic-ws', this doesn't regard cpp
1511 ;; directives as syntactic whitespace.
1512 t (c-concat-separated
1513 (list (when (c-lang-const c-line-comment-starter)
1514 (concat (regexp-quote (c-lang-const c-line-comment-starter))
1516 (c-lang-const c-block-comment-regexp)
1518 (when (memq 'gen-comment-delim c-emacs-features)
1522 (c-lang-defconst c-syntactic-ws
1523 ;; Regexp matching syntactic whitespace, including possibly the
1524 ;; empty string. As opposed to `c-(forward|backward)-syntactic-ws',
1525 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1526 ;; not contain a \| operator at the top level.
1527 t (concat (c-lang-const c-simple-ws) "*"
1529 (concat "\\(" (c-lang-const c-nonwhite-syntactic-ws) "\\)"
1530 (c-lang-const c-simple-ws) "*")
1533 (c-lang-defconst c-syntactic-ws-depth
1534 ;; Number of regexp grouping parens in `c-syntactic-ws'.
1535 t (regexp-opt-depth (c-lang-const c-syntactic-ws)))
1537 (c-lang-defconst c-nonempty-syntactic-ws
1538 ;; Regexp matching syntactic whitespace, which is at least one
1539 ;; character long. As opposed to `c-(forward|backward)-syntactic-ws',
1540 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1541 ;; not contain a \| operator at the top level.
1543 (c-lang-const c-simple-ws)
1545 (c-lang-const c-nonwhite-syntactic-ws)
1548 (c-lang-defconst c-nonempty-syntactic-ws-depth
1549 ;; Number of regexp grouping parens in `c-nonempty-syntactic-ws'.
1550 t (regexp-opt-depth (c-lang-const c-nonempty-syntactic-ws)))
1552 (c-lang-defconst c-single-line-syntactic-ws
1553 ;; Regexp matching syntactic whitespace without any line breaks. As
1554 ;; opposed to `c-(forward|backward)-syntactic-ws', this doesn't
1555 ;; regard cpp directives as syntactic whitespace. Does not contain
1556 ;; a \| operator at the top level.
1557 t (if (c-lang-const c-block-comment-regexp)
1559 (c-lang-const c-block-comment-regexp)
1563 (c-lang-defconst c-single-line-syntactic-ws-depth
1564 ;; Number of regexp grouping parens in `c-single-line-syntactic-ws'.
1565 t (regexp-opt-depth (c-lang-const c-single-line-syntactic-ws)))
1567 (c-lang-defconst c-syntactic-eol
1568 ;; Regexp that matches when there is no syntactically significant
1569 ;; text before eol. Macros are regarded as syntactically
1570 ;; significant text here.
1571 t (concat (c-lang-const c-single-line-syntactic-ws)
1572 ;; Match eol (possibly inside a block comment or preceded
1573 ;; by a line continuation backslash), or the beginning of a
1574 ;; line comment. Note: This has to be modified for awk
1575 ;; where line comments start with '#'.
1578 (list (when (c-lang-const c-line-comment-starter)
1579 (regexp-quote (c-lang-const c-line-comment-starter)))
1580 (when (c-lang-const c-unterminated-block-comment-regexp)
1581 (concat (c-lang-const c-unterminated-block-comment-regexp)
1587 (c-lang-defvar c-syntactic-eol (c-lang-const c-syntactic-eol))
1592 ;; The Emacs variables beginning-of-defun-function and end-of-defun-function
1593 ;; will be set so that commands like `mark-defun' and `narrow-to-defun' work
1594 ;; right. In older Emacsen, the key sequences C-M-a and C-M-e are, however,
1595 ;; bound directly to the CC Mode functions, allowing optimization for large n.
1596 ;; From Emacs 23, this isn't necessary any more, since n is passed to the two
1598 (c-lang-defconst beginning-of-defun-function
1599 "Function to which beginning-of-defun-function will be set."
1600 t 'c-beginning-of-defun
1601 awk 'c-awk-beginning-of-defun)
1602 (c-lang-setvar beginning-of-defun-function
1603 (c-lang-const beginning-of-defun-function))
1605 (c-lang-defconst end-of-defun-function
1606 "Function to which end-of-defun-function will be set."
1608 awk 'c-awk-end-of-defun)
1609 (c-lang-setvar end-of-defun-function (c-lang-const end-of-defun-function))
1611 ;;; In-comment text handling.
1613 (c-lang-defconst c-paragraph-start
1614 "Regexp to append to `paragraph-start'."
1616 java "\\(@[a-zA-Z]+\\>\\|$\\)" ; For Javadoc.
1617 pike "\\(@[a-zA-Z_-]+\\>\\([^{]\\|$\\)\\|$\\)") ; For Pike refdoc.
1618 (c-lang-defvar c-paragraph-start (c-lang-const c-paragraph-start))
1620 (c-lang-defconst c-paragraph-separate
1621 "Regexp to append to `paragraph-separate'."
1623 pike (c-lang-const c-paragraph-start))
1624 (c-lang-defvar c-paragraph-separate (c-lang-const c-paragraph-separate))
1629 ;; Note: All and only all language constants containing keyword lists
1630 ;; should end with "-kwds"; they're automatically collected into the
1631 ;; `c-kwds-lang-consts' list below and used to build `c-keywords' etc.
1633 (c-lang-defconst c-primitive-type-kwds
1634 "Primitive type keywords. As opposed to the other keyword lists, the
1635 keywords listed here are fontified with the type face instead of the
1638 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1639 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1640 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1643 Do not try to modify this list for end user customizations; the
1644 `*-font-lock-extra-types' variable, where `*' is the mode prefix, is
1645 the appropriate place for that."
1646 t '("char" "double" "float" "int" "long" "short" "signed"
1649 '("_Bool" "_Complex" "_Imaginary") ; Conditionally defined in C99.
1650 (c-lang-const c-primitive-type-kwds))
1652 '("bool" "wchar_t" "char16_t" "char32_t")
1653 (c-lang-const c-primitive-type-kwds))
1654 ;; Objective-C extends C, but probably not the new stuff in C99.
1656 '("id" "Class" "SEL" "IMP" "BOOL")
1657 (c-lang-const c-primitive-type-kwds))
1658 java '("boolean" "byte" "char" "double" "float" "int" "long" "short" "void")
1659 idl '("Object" "ValueBase" "any" "boolean" "char" "double" "fixed" "float"
1660 "long" "octet" "sequence" "short" "string" "void" "wchar" "wstring"
1663 ;; The following can't really end a type, but we have to specify them
1664 ;; here due to the assumption in `c-primitive-type-prefix-kwds'. It
1665 ;; doesn't matter that much.
1666 "unsigned" "strong")
1667 pike '(;; this_program isn't really a keyword, but it's practically
1668 ;; used as a builtin type.
1669 "array" "float" "function" "int" "mapping" "mixed" "multiset"
1670 "object" "program" "string" "this_program" "void"))
1672 (c-lang-defconst c-primitive-type-key
1673 ;; An adorned regexp that matches `c-primitive-type-kwds'.
1674 t (c-make-keywords-re t (c-lang-const c-primitive-type-kwds)))
1675 (c-lang-defvar c-primitive-type-key (c-lang-const c-primitive-type-key))
1677 (c-lang-defconst c-primitive-type-prefix-kwds
1678 "Keywords that might act as prefixes for primitive types. Assumed to
1679 be a subset of `c-primitive-type-kwds'."
1681 (c c++) '("long" "short" "signed" "unsigned")
1682 idl '("long" "unsigned"
1686 (c-lang-defconst c-typedef-kwds
1687 "Prefix keyword\(s\) like \"typedef\" which make a type declaration out
1688 of a variable declaration."
1692 (c-lang-defconst c-typedef-key
1693 ;; Adorned regexp matching `c-typedef-kwds'.
1694 t (c-make-keywords-re t (c-lang-const c-typedef-kwds)))
1695 (c-lang-defvar c-typedef-key (c-lang-const c-typedef-key))
1697 (c-lang-defconst c-typeof-kwds
1698 "Keywords followed by a parenthesized expression, which stands for
1699 the type of that expression."
1701 c '("typeof") ; longstanding GNU C(++) extension.
1702 c++ '("decltype" "typeof"))
1704 (c-lang-defconst c-typeof-key
1705 ;; Adorned regexp matching `c-typeof-kwds'.
1706 t (c-make-keywords-re t (c-lang-const c-typeof-kwds)))
1707 (c-lang-defvar c-typeof-key (c-lang-const c-typeof-key))
1709 (c-lang-defconst c-type-prefix-kwds
1710 "Keywords where the following name - if any - is a type name, and
1711 where the keyword together with the symbol works as a type in
1714 Note that an alternative if the second part doesn't hold is
1715 `c-type-list-kwds'. Keywords on this list are typically also present
1716 on one of the `*-decl-kwds' lists."
1718 c '("struct" "union" "enum")
1719 c++ (append '("class" "typename")
1720 (c-lang-const c-type-prefix-kwds c)))
1722 (c-lang-defconst c-type-prefix-key
1723 ;; Adorned regexp matching `c-type-prefix-kwds'.
1724 t (c-make-keywords-re t (c-lang-const c-type-prefix-kwds)))
1725 (c-lang-defvar c-type-prefix-key (c-lang-const c-type-prefix-key))
1727 (c-lang-defconst c-type-modifier-kwds
1728 "Type modifier keywords. These can occur almost anywhere in types
1729 but they don't build a type of themselves. Unlike the keywords on
1730 `c-primitive-type-kwds', they are fontified with the keyword face and
1733 c '("const" "restrict" "volatile")
1734 c++ '("const" "constexpr" "noexcept" "volatile" "throw")
1735 objc '("const" "volatile"))
1737 (c-lang-defconst c-opt-type-modifier-key
1738 ;; Adorned regexp matching `c-type-modifier-kwds', or nil in
1739 ;; languages without such keywords.
1740 t (and (c-lang-const c-type-modifier-kwds)
1741 (c-make-keywords-re t (c-lang-const c-type-modifier-kwds))))
1742 (c-lang-defvar c-opt-type-modifier-key (c-lang-const c-opt-type-modifier-key))
1744 (c-lang-defconst c-opt-type-component-key
1745 ;; An adorned regexp that matches `c-primitive-type-prefix-kwds' and
1746 ;; `c-type-modifier-kwds', or nil in languages without any of them.
1747 t (and (or (c-lang-const c-primitive-type-prefix-kwds)
1748 (c-lang-const c-type-modifier-kwds))
1749 (c-make-keywords-re t
1750 (append (c-lang-const c-primitive-type-prefix-kwds)
1751 (c-lang-const c-type-modifier-kwds)))))
1752 (c-lang-defvar c-opt-type-component-key
1753 (c-lang-const c-opt-type-component-key))
1755 (c-lang-defconst c-type-start-kwds
1756 ;; All keywords that can start a type (i.e. are either a type prefix
1757 ;; or a complete type).
1758 t (delete-duplicates (append (c-lang-const c-primitive-type-kwds)
1759 (c-lang-const c-type-prefix-kwds)
1760 (c-lang-const c-type-modifier-kwds))
1761 :test 'string-equal))
1763 (c-lang-defconst c-class-decl-kwds
1764 "Keywords introducing declarations where the following block (if any)
1765 contains another declaration level that should be considered a class.
1767 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1768 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1769 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1772 Note that presence on this list does not automatically treat the
1773 following identifier as a type; the keyword must also be present on
1774 `c-type-prefix-kwds' or `c-type-list-kwds' to accomplish that."
1776 c '("struct" "union")
1777 c++ '("class" "struct" "union")
1778 objc '("struct" "union"
1779 "@interface" "@implementation" "@protocol")
1780 java '("class" "@interface" "interface")
1781 idl '("component" "eventtype" "exception" "home" "interface" "struct"
1784 "storagehome" "storagetype"
1786 "catalog" "executor" "manages" "segment")
1789 (c-lang-defconst c-class-key
1790 ;; Regexp matching the start of a class.
1791 t (c-make-keywords-re t (c-lang-const c-class-decl-kwds)))
1792 (c-lang-defvar c-class-key (c-lang-const c-class-key))
1794 (c-lang-defconst c-brace-list-decl-kwds
1795 "Keywords introducing declarations where the following block (if
1796 any) is a brace list.
1798 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1799 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1800 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1805 (c-lang-defconst c-brace-list-key
1806 ;; Regexp matching the start of declarations where the following
1807 ;; block is a brace list.
1808 t (c-make-keywords-re t (c-lang-const c-brace-list-decl-kwds)))
1809 (c-lang-defvar c-brace-list-key (c-lang-const c-brace-list-key))
1811 (c-lang-defconst c-after-brace-list-decl-kwds
1812 "Keywords that might follow keywords in `c-brace-list-decl-kwds'
1813 and precede the opening brace."
1815 c++ '("class" "struct"))
1817 (c-lang-defconst c-after-brace-list-key
1818 ;; Regexp matching keywords that can fall between a brace-list
1819 ;; keyword and the associated brace list.
1820 t (c-make-keywords-re t (c-lang-const c-after-brace-list-decl-kwds)))
1821 (c-lang-defvar c-after-brace-list-key (c-lang-const c-after-brace-list-key))
1823 (c-lang-defconst c-recognize-post-brace-list-type-p
1824 "Set to t when we recognize a colon and then a type after an enum,
1825 e.g., enum foo : int { A, B, C };"
1828 (c-lang-defvar c-recognize-post-brace-list-type-p
1829 (c-lang-const c-recognize-post-brace-list-type-p))
1831 (c-lang-defconst c-other-block-decl-kwds
1832 "Keywords where the following block (if any) contains another
1833 declaration level that should not be considered a class. For every
1834 keyword here, CC Mode will add a set of special syntactic symbols for
1835 those blocks. E.g. if the keyword is \"foo\" then there will be
1836 `foo-open', `foo-close', and `infoo' symbols.
1838 The intention is that this category should be used for block
1839 constructs that aren't related to object orientation concepts like
1840 classes (which thus also include e.g. interfaces, templates,
1841 contracts, structs, etc). The more pragmatic distinction is that
1842 while most want some indentation inside classes, it's fairly common
1843 that they don't want it in some of these constructs, so it should be
1844 simple to configure that differently from classes. See also
1845 `c-class-decl-kwds'.
1847 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1848 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1849 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1852 (c objc) '("extern")
1853 c++ '("namespace" "extern")
1858 (c-lang-defconst c-other-decl-block-key
1859 ;; Regexp matching the start of blocks besides classes that contain
1860 ;; another declaration level.
1861 t (c-make-keywords-re t (c-lang-const c-other-block-decl-kwds)))
1862 (c-lang-defvar c-other-decl-block-key (c-lang-const c-other-decl-block-key))
1864 (c-lang-defvar c-other-decl-block-key-in-symbols-alist
1868 (if (string= elt "extern")
1870 (intern (concat "in" elt)))))
1871 (c-lang-const c-other-block-decl-kwds))
1872 "Alist associating keywords in c-other-decl-block-decl-kwds with
1873 their matching \"in\" syntactic symbols.")
1875 (c-lang-defconst c-typedef-decl-kwds
1876 "Keywords introducing declarations where the identifier(s) being
1879 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1880 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1881 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1883 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1884 ;; (since e.g. "Foo" is a type that's being defined in "class Foo
1886 t (append (c-lang-const c-class-decl-kwds)
1887 (c-lang-const c-brace-list-decl-kwds))
1888 ;; Languages that have a "typedef" construct.
1889 (c c++ objc idl pike) (append (c-lang-const c-typedef-decl-kwds)
1891 ;; Unlike most other languages, exception names are not handled as
1892 ;; types in IDL since they only can occur in "raises" specs.
1893 idl (delete "exception" (append (c-lang-const c-typedef-decl-kwds) nil)))
1895 (c-lang-defconst c-typedef-decl-key
1896 t (c-make-keywords-re t (c-lang-const c-typedef-decl-kwds)))
1897 (c-lang-defvar c-typedef-decl-key (c-lang-const c-typedef-decl-key))
1899 (c-lang-defconst c-typeless-decl-kwds
1900 "Keywords introducing declarations where the \(first) identifier
1901 \(declarator) follows directly after the keyword, without any type.
1903 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1904 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1905 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1907 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1908 ;; (since e.g. "Foo" is the identifier being defined in "class Foo
1910 t (append (c-lang-const c-class-decl-kwds)
1911 (c-lang-const c-brace-list-decl-kwds))
1912 c++ (append (c-lang-const c-typeless-decl-kwds) '("auto")) ; C++11.
1913 ;; Note: "manages" for CORBA CIDL clashes with its presence on
1914 ;; `c-type-list-kwds' for IDL.
1915 idl (append (c-lang-const c-typeless-decl-kwds)
1916 '("factory" "finder" "native"
1921 pike (append (c-lang-const c-class-decl-kwds)
1924 (c-lang-defconst c-modifier-kwds
1925 "Keywords that can prefix normal declarations of identifiers
1926 \(and typically act as flags). Things like argument declarations
1927 inside function headers are also considered declarations in this
1930 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1931 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1932 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1935 (c c++) '("auto" "extern" "inline" "register" "static")
1936 c++ (append '("explicit" "friend" "mutable" "template" "thread_local"
1938 (c-lang-const c-modifier-kwds))
1939 objc '("auto" "bycopy" "byref" "extern" "in" "inout" "oneway" "out" "static")
1940 ;; FIXME: Some of those below ought to be on `c-other-decl-kwds' instead.
1941 idl '("abstract" "attribute" "const" "consumes" "custom" "emits" "import"
1942 "in" "inout" "local" "multiple" "oneway" "out" "private" "provides"
1943 "public" "publishes" "readonly" "typeid" "typeprefix" "uses"
1947 "bindsTo" "delegatesTo" "implements" "proxy" "storedOn")
1948 ;; Note: "const" is not used in Java, but it's still a reserved keyword.
1949 java '("abstract" "const" "final" "native" "private" "protected" "public"
1950 "static" "strictfp" "synchronized" "transient" "volatile")
1951 pike '("final" "inline" "local" "nomask" "optional" "private" "protected"
1952 "public" "static" "variant"))
1954 (c-lang-defconst c-other-decl-kwds
1955 "Keywords that can start or prefix any declaration level construct,
1956 besides those on `c-class-decl-kwds', `c-brace-list-decl-kwds',
1957 `c-other-block-decl-kwds', `c-typedef-decl-kwds',
1958 `c-typeless-decl-kwds' and `c-modifier-kwds'.
1960 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1961 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1962 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1965 objc '("@class" "@end" "@defs")
1966 java '("import" "package")
1967 pike '("import" "inherit"))
1969 (c-lang-defconst c-decl-start-kwds
1970 "Keywords that always start declarations, wherever they occur.
1971 This can be used for declarations that aren't recognized by the normal
1972 combination of `c-decl-prefix-re' and `c-decl-start-re'."
1974 ;; Classes can be declared anywhere in a Pike expression.
1977 (c-lang-defconst c-decl-hangon-kwds
1978 "Keywords that can occur anywhere in a declaration level construct.
1979 This is used for self-contained things that can be tacked on anywhere
1980 on a declaration and that should be ignored to be able to recognize it
1981 correctly. Typical cases are compiler extensions like
1982 \"__attribute__\" or \"__declspec\":
1984 __declspec(noreturn) void foo();
1985 class __declspec(dllexport) classname {...};
1986 void foo() __attribute__((noreturn));
1988 Note that unrecognized plain symbols are skipped anyway if they occur
1989 before the type, so such things are not necessary to mention here.
1990 Mentioning them here is necessary only if they can occur in other
1991 places, or if they are followed by a construct that must be skipped
1992 over \(like the parens in the \"__attribute__\" and \"__declspec\"
1993 examples above). In the last case, they alse need to be present on
1994 one of `c-type-list-kwds', `c-ref-list-kwds',
1995 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1996 `c-<>-type-kwds', or `c-<>-arglist-kwds'."
1997 ;; NB: These are currently not recognized in all parts of a
1998 ;; declaration. Specifically, they aren't recognized in the middle
1999 ;; of multi-token types, inside declarators, and between the
2000 ;; identifier and the arglist paren of a function declaration.
2002 ;; FIXME: This ought to be user customizable since compiler stuff
2003 ;; like this usually is wrapped in project specific macros. (It'd
2004 ;; of course be even better if we could cope without knowing this.)
2006 (c c++) '(;; GCC extension.
2011 (c-lang-defconst c-decl-hangon-key
2012 ;; Adorned regexp matching `c-decl-hangon-kwds'.
2013 t (c-make-keywords-re t (c-lang-const c-decl-hangon-kwds)))
2014 (c-lang-defvar c-decl-hangon-key (c-lang-const c-decl-hangon-key))
2016 (c-lang-defconst c-prefix-spec-kwds
2017 ;; All keywords that can occur in the preamble of a declaration.
2018 ;; They typically occur before the type, but they are also matched
2019 ;; after presumptive types since we often can't be sure that
2020 ;; something is a type or just some sort of macro in front of the
2021 ;; declaration. They might be ambiguous with types or type
2023 t (delete-duplicates (append (c-lang-const c-class-decl-kwds)
2024 (c-lang-const c-brace-list-decl-kwds)
2025 (c-lang-const c-other-block-decl-kwds)
2026 (c-lang-const c-typedef-decl-kwds)
2027 (c-lang-const c-typeless-decl-kwds)
2028 (c-lang-const c-modifier-kwds)
2029 (c-lang-const c-other-decl-kwds)
2030 (c-lang-const c-decl-start-kwds)
2031 (c-lang-const c-decl-hangon-kwds))
2032 :test 'string-equal))
2034 (c-lang-defconst c-prefix-spec-kwds-re
2035 ;; Adorned regexp of `c-prefix-spec-kwds'.
2036 t (c-make-keywords-re t (c-lang-const c-prefix-spec-kwds)))
2038 (c-lang-defvar c-prefix-spec-kwds-re (c-lang-const c-prefix-spec-kwds-re))
2040 (c-lang-defconst c-specifier-key
2041 ;; Adorned regexp of the keywords in `c-prefix-spec-kwds' that aren't
2042 ;; ambiguous with types or type prefixes. These are the keywords (like
2043 ;; extern, namespace, but NOT template) that can modify a declaration.
2044 t (c-make-keywords-re t
2045 (set-difference (c-lang-const c-prefix-spec-kwds)
2046 (append (c-lang-const c-type-start-kwds)
2047 (c-lang-const c-<>-arglist-kwds))
2048 :test 'string-equal)))
2049 (c-lang-defvar c-specifier-key (c-lang-const c-specifier-key))
2051 (c-lang-defconst c-postfix-spec-kwds
2052 ;; Keywords that can occur after argument list of a function header
2053 ;; declaration, i.e. in the "K&R region".
2054 t (append (c-lang-const c-postfix-decl-spec-kwds)
2055 (c-lang-const c-decl-hangon-kwds)))
2057 (c-lang-defconst c-not-decl-init-keywords
2058 ;; Adorned regexp matching all keywords that can't appear at the
2059 ;; start of a declaration.
2060 t (c-make-keywords-re t
2061 (set-difference (c-lang-const c-keywords)
2062 (append (c-lang-const c-type-start-kwds)
2063 (c-lang-const c-prefix-spec-kwds)
2064 (c-lang-const c-typeof-kwds))
2065 :test 'string-equal)))
2066 (c-lang-defvar c-not-decl-init-keywords
2067 (c-lang-const c-not-decl-init-keywords))
2069 (c-lang-defconst c-not-primitive-type-keywords
2070 "List of all keywords apart from primitive types (like \"int\")."
2071 t (set-difference (c-lang-const c-keywords)
2072 (c-lang-const c-primitive-type-kwds)
2073 :test 'string-equal)
2074 ;; The "more" for C++ is the QT keyword (as in "more slots:").
2075 ;; This variable is intended for use in c-beginning-of-statement-1.
2076 c++ (append (c-lang-const c-not-primitive-type-keywords) '("more")))
2078 (c-lang-defconst c-not-primitive-type-keywords-regexp
2079 t (c-make-keywords-re t
2080 (c-lang-const c-not-primitive-type-keywords)))
2081 (c-lang-defvar c-not-primitive-type-keywords-regexp
2082 (c-lang-const c-not-primitive-type-keywords-regexp))
2084 (c-lang-defconst c-protection-kwds
2085 "Access protection label keywords in classes."
2087 c++ '("private" "protected" "public")
2088 objc '("@private" "@protected" "@public"))
2090 (c-lang-defconst c-block-decls-with-vars
2091 "Keywords introducing declarations that can contain a block which
2092 might be followed by variable declarations, e.g. like \"foo\" in
2093 \"class Foo { ... } foo;\". So if there is a block in a declaration
2094 like that, it ends with the following ';' and not right away.
2096 The keywords on list are assumed to also be present on one of the
2097 `*-decl-kwds' lists."
2099 (c objc) '("struct" "union" "enum" "typedef")
2100 c++ '("class" "struct" "union" "enum" "typedef"))
2102 (c-lang-defconst c-opt-block-decls-with-vars-key
2103 ;; Regexp matching the `c-block-decls-with-vars' keywords, or nil in
2104 ;; languages without such constructs.
2105 t (and (c-lang-const c-block-decls-with-vars)
2106 (c-make-keywords-re t (c-lang-const c-block-decls-with-vars))))
2107 (c-lang-defvar c-opt-block-decls-with-vars-key
2108 (c-lang-const c-opt-block-decls-with-vars-key))
2110 (c-lang-defconst c-postfix-decl-spec-kwds
2111 "Keywords introducing extra declaration specifiers in the region
2112 between the header and the body \(i.e. the \"K&R-region\") in
2115 java '("extends" "implements" "throws")
2116 idl '("context" "getraises" "manages" "primarykey" "raises" "setraises"
2119 "as" "const" "implements" "of" "ref"))
2121 (c-lang-defconst c-postfix-decl-spec-key
2122 ;; Regexp matching the keywords in `c-postfix-decl-spec-kwds'.
2123 t (c-make-keywords-re t (c-lang-const c-postfix-decl-spec-kwds)))
2124 (c-lang-defvar c-postfix-decl-spec-key
2125 (c-lang-const c-postfix-decl-spec-key))
2127 (c-lang-defconst c-nonsymbol-sexp-kwds
2128 "Keywords that may be followed by a nonsymbol sexp before whatever
2129 construct it's part of continues."
2131 (c c++ objc) '("extern"))
2133 (c-lang-defconst c-type-list-kwds
2134 "Keywords that may be followed by a comma separated list of type
2135 identifiers, where each optionally can be prefixed by keywords. (Can
2136 also be used for the special case when the list can contain only one
2139 Assumed to be mutually exclusive with `c-ref-list-kwds'. There's no
2140 reason to put keywords on this list if they are on `c-type-prefix-kwds'.
2141 There's also no reason to add keywords that prefixes a normal
2142 declaration consisting of a type followed by a declarator (list), so
2143 the keywords on `c-modifier-kwds' should normally not be listed here
2146 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2147 or variable identifier (that's being defined)."
2151 java '("import" "new" "extends" "super" "implements" "throws")
2152 idl '("manages" "native" "primarykey" "supports"
2154 "as" "implements" "of" "scope")
2157 (c-lang-defconst c-ref-list-kwds
2158 "Keywords that may be followed by a comma separated list of
2159 reference (i.e. namespace/scope/module) identifiers, where each
2160 optionally can be prefixed by keywords. (Can also be used for the
2161 special case when the list can contain only one element.) Assumed to
2162 be mutually exclusive with `c-type-list-kwds'.
2164 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2165 or variable identifier (that's being defined)."
2169 idl '("import" "module"
2174 (c-lang-defconst c-colon-type-list-kwds
2175 "Keywords that may be followed (not necessarily directly) by a colon
2176 and then a comma separated list of type identifiers, where each
2177 optionally can be prefixed by keywords. (Can also be used for the
2178 special case when the list can contain only one element.)"
2180 c++ '("class" "struct")
2181 idl '("component" "eventtype" "home" "interface" "valuetype"
2183 "storagehome" "storagetype"))
2185 (c-lang-defconst c-colon-type-list-re
2186 "Regexp matched after the keywords in `c-colon-type-list-kwds' to skip
2187 forward to the colon. The end of the match is assumed to be directly
2188 after the colon, so the regexp should end with \":\". Must be a
2189 regexp if `c-colon-type-list-kwds' isn't nil."
2190 t (if (c-lang-const c-colon-type-list-kwds)
2191 ;; Disallow various common punctuation chars that can't come
2192 ;; before the ":" that starts the inherit list after "class"
2193 ;; or "struct" in C++. (Also used as default for other
2195 "[^\]\[{}();,/#=:]*:"))
2196 (c-lang-defvar c-colon-type-list-re (c-lang-const c-colon-type-list-re))
2198 (c-lang-defconst c-paren-nontype-kwds
2199 "Keywords that may be followed by a parenthesis expression that doesn't
2200 contain type identifiers."
2202 (c c++) '(;; GCC extension.
2207 (c-lang-defconst c-paren-type-kwds
2208 "Keywords that may be followed by a parenthesis expression containing
2209 type identifiers separated by arbitrary tokens."
2214 pike '("array" "function" "int" "mapping" "multiset" "object" "program"))
2216 (c-lang-defconst c-paren-any-kwds
2217 t (delete-duplicates (append (c-lang-const c-paren-nontype-kwds)
2218 (c-lang-const c-paren-type-kwds))
2219 :test 'string-equal))
2221 (c-lang-defconst c-<>-type-kwds
2222 "Keywords that may be followed by an angle bracket expression
2223 containing type identifiers separated by \",\". The difference from
2224 `c-<>-arglist-kwds' is that unknown names are taken to be types and
2225 not other identifiers. `c-recognize-<>-arglists' is assumed to be set
2233 (c-lang-defconst c-<>-arglist-kwds
2234 "Keywords that can be followed by a C++ style template arglist; see
2235 `c-recognize-<>-arglists' for details. That language constant is
2236 assumed to be set if this isn't nil."
2239 idl '("fixed" "string" "wstring"))
2241 (c-lang-defconst c-<>-sexp-kwds
2242 ;; All keywords that can be followed by an angle bracket sexp.
2243 t (delete-duplicates (append (c-lang-const c-<>-type-kwds)
2244 (c-lang-const c-<>-arglist-kwds))
2245 :test 'string-equal))
2247 (c-lang-defconst c-opt-<>-sexp-key
2248 ;; Adorned regexp matching keywords that can be followed by an angle
2249 ;; bracket sexp. Always set when `c-recognize-<>-arglists' is.
2250 t (c-make-keywords-re t (c-lang-const c-<>-sexp-kwds)))
2251 (c-lang-defvar c-opt-<>-sexp-key (c-lang-const c-opt-<>-sexp-key))
2253 (c-lang-defconst c-brace-id-list-kwds
2254 "Keywords that may be followed by a brace block containing a comma
2255 separated list of identifier definitions, i.e. like the list of
2256 identifiers that follows the type in a normal declaration."
2257 t (c-lang-const c-brace-list-decl-kwds))
2259 (c-lang-defconst c-block-stmt-1-kwds
2260 "Statement keywords followed directly by a substatement."
2262 c++ '("do" "else" "try")
2263 objc '("do" "else" "@finally" "@try")
2264 java '("do" "else" "finally" "try")
2267 (c-lang-defconst c-block-stmt-1-key
2268 ;; Regexp matching the start of any statement followed directly by a
2269 ;; substatement (doesn't match a bare block, however).
2270 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-kwds)))
2271 (c-lang-defvar c-block-stmt-1-key (c-lang-const c-block-stmt-1-key))
2273 (c-lang-defconst c-block-stmt-1-2-kwds
2274 "Statement keywords optionally followed by a paren sexp.
2275 Keywords here should also be in `c-block-stmt-1-kwds'."
2279 (c-lang-defconst c-block-stmt-1-2-key
2280 ;; Regexp matching the start of a statement which may be followed by a
2281 ;; paren sexp and will then be followed by a substatement.
2282 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-2-kwds)))
2283 (c-lang-defvar c-block-stmt-1-2-key (c-lang-const c-block-stmt-1-2-key))
2285 (c-lang-defconst c-block-stmt-2-kwds
2286 "Statement keywords followed by a paren sexp and then by a substatement."
2287 t '("for" "if" "switch" "while")
2288 c++ '("for" "if" "switch" "while" "catch")
2289 objc '("for" "if" "switch" "while" "@catch" "@synchronized")
2290 java '("for" "if" "switch" "while" "catch" "synchronized")
2292 pike '("for" "if" "switch" "while" "foreach")
2293 awk '("for" "if" "while"))
2295 (c-lang-defconst c-block-stmt-2-key
2296 ;; Regexp matching the start of any statement followed by a paren sexp
2297 ;; and then by a substatement.
2298 t (c-make-keywords-re t (c-lang-const c-block-stmt-2-kwds)))
2299 (c-lang-defvar c-block-stmt-2-key (c-lang-const c-block-stmt-2-key))
2301 (c-lang-defconst c-block-stmt-kwds
2302 ;; Union of `c-block-stmt-1-kwds' and `c-block-stmt-2-kwds'.
2303 t (delete-duplicates (append (c-lang-const c-block-stmt-1-kwds)
2304 (c-lang-const c-block-stmt-2-kwds))
2305 :test 'string-equal))
2307 (c-lang-defconst c-opt-block-stmt-key
2308 ;; Regexp matching the start of any statement that has a
2309 ;; substatement (except a bare block). Nil in languages that
2310 ;; don't have such constructs.
2311 t (if (or (c-lang-const c-block-stmt-1-kwds)
2312 (c-lang-const c-block-stmt-2-kwds))
2313 (c-make-keywords-re t
2314 (append (c-lang-const c-block-stmt-1-kwds)
2315 (c-lang-const c-block-stmt-2-kwds)))))
2316 (c-lang-defvar c-opt-block-stmt-key (c-lang-const c-opt-block-stmt-key))
2318 (c-lang-defconst c-simple-stmt-kwds
2319 "Statement keywords followed by an expression or nothing."
2320 t '("break" "continue" "goto" "return")
2321 objc '("break" "continue" "goto" "return" "@throw")
2322 ;; Note: `goto' is not valid in Java, but the keyword is still reserved.
2323 java '("break" "continue" "goto" "return" "throw")
2325 pike '("break" "continue" "return")
2326 awk '(;; Not sure about "delete", "exit", "getline", etc. ; ACM 2002/5/30
2327 "break" "continue" "return" "delete" "exit" "getline" "next"
2328 "nextfile" "print" "printf"))
2330 (c-lang-defconst c-simple-stmt-key
2331 ;; Adorned regexp matching `c-simple-stmt-kwds'.
2332 t (c-make-keywords-re t (c-lang-const c-simple-stmt-kwds)))
2333 (c-lang-defvar c-simple-stmt-key (c-lang-const c-simple-stmt-key))
2335 (c-lang-defconst c-paren-stmt-kwds
2336 "Statement keywords followed by a parenthesis expression that
2337 nevertheless contains a list separated with ';' and not ','."
2341 (c-lang-defconst c-paren-stmt-key
2342 ;; Adorned regexp matching `c-paren-stmt-kwds'.
2343 t (c-make-keywords-re t (c-lang-const c-paren-stmt-kwds)))
2344 (c-lang-defvar c-paren-stmt-key (c-lang-const c-paren-stmt-key))
2346 (c-lang-defconst c-asm-stmt-kwds
2347 "Statement keywords followed by an assembler expression."
2349 (c c++) '("asm" "__asm__")) ;; Not standard, but common.
2351 (c-lang-defconst c-opt-asm-stmt-key
2352 ;; Regexp matching the start of an assembler statement. Nil in
2353 ;; languages that don't support that.
2354 t (if (c-lang-const c-asm-stmt-kwds)
2355 (c-make-keywords-re t (c-lang-const c-asm-stmt-kwds))))
2356 (c-lang-defvar c-opt-asm-stmt-key (c-lang-const c-opt-asm-stmt-key))
2358 (c-lang-defconst c-case-kwds
2359 "The keyword\(s) which introduce a \"case\" like construct.
2360 This construct is \"<keyword> <expression> :\"."
2364 (c-lang-defconst c-case-kwds-regexp
2365 ;; Adorned regexp matching any "case"-like keyword.
2366 t (c-make-keywords-re t (c-lang-const c-case-kwds)))
2367 (c-lang-defvar c-case-kwds-regexp (c-lang-const c-case-kwds-regexp))
2369 (c-lang-defconst c-label-kwds
2370 "Keywords introducing colon terminated labels in blocks."
2371 t '("case" "default"))
2373 (c-lang-defconst c-label-kwds-regexp
2374 ;; Adorned regexp matching any keyword that introduces a label.
2375 t (c-make-keywords-re t (c-lang-const c-label-kwds)))
2376 (c-lang-defvar c-label-kwds-regexp (c-lang-const c-label-kwds-regexp))
2378 (c-lang-defconst c-before-label-kwds
2379 "Keywords that might be followed by a label identifier."
2381 (java pike) (append '("break" "continue")
2382 (c-lang-const c-before-label-kwds))
2386 (c-lang-defconst c-constant-kwds
2387 "Keywords for constants."
2389 c '("NULL" ;; Not a keyword, but practically works as one.
2390 "false" "true") ; Defined in C99.
2393 (c-lang-const c-constant-kwds))
2394 objc '("nil" "Nil" "YES" "NO" "NS_DURING" "NS_HANDLER" "NS_ENDHANDLER")
2395 idl '("TRUE" "FALSE")
2396 java '("true" "false" "null") ; technically "literals", not keywords
2397 pike '("UNDEFINED")) ;; Not a keyword, but practically works as one.
2399 (c-lang-defconst c-primary-expr-kwds
2400 "Keywords besides constants and operators that start primary expressions."
2402 c++ '("operator" "this")
2403 objc '("super" "self")
2405 pike '("this")) ;; Not really a keyword, but practically works as one.
2407 (c-lang-defconst c-expr-kwds
2408 ;; Keywords that can occur anywhere in expressions. Built from
2409 ;; `c-primary-expr-kwds' and all keyword operators in `c-operators'.
2410 t (delete-duplicates
2411 (append (c-lang-const c-primary-expr-kwds)
2412 (c-filter-ops (c-lang-const c-operator-list)
2414 "\\`\\(\\w\\|\\s_\\)+\\'"))
2415 :test 'string-equal))
2417 (c-lang-defconst c-lambda-kwds
2418 "Keywords that start lambda constructs, i.e. function definitions in
2423 (c-lang-defconst c-inexpr-block-kwds
2424 "Keywords that start constructs followed by statement blocks which can
2425 be used in expressions \(the gcc extension for this in C and C++ is
2426 handled separately by `c-recognize-paren-inexpr-blocks')."
2428 pike '("catch" "gauge"))
2430 (c-lang-defconst c-inexpr-class-kwds
2431 "Keywords that can start classes inside expressions."
2436 (c-lang-defconst c-inexpr-brace-list-kwds
2437 "Keywords that can start brace list blocks inside expressions.
2438 Note that Java specific rules are currently applied to tell this from
2439 `c-inexpr-class-kwds'."
2443 (c-lang-defconst c-opt-inexpr-brace-list-key
2444 ;; Regexp matching the start of a brace list in an expression, or
2445 ;; nil in languages that don't have such things. This should not
2446 ;; match brace lists recognized through `c-special-brace-lists'.
2447 t (and (c-lang-const c-inexpr-brace-list-kwds)
2448 (c-make-keywords-re t (c-lang-const c-inexpr-brace-list-kwds))))
2449 (c-lang-defvar c-opt-inexpr-brace-list-key
2450 (c-lang-const c-opt-inexpr-brace-list-key))
2452 (c-lang-defconst c-decl-block-key
2453 ;; Regexp matching keywords in any construct that contain another
2454 ;; declaration level, i.e. that isn't followed by a function block
2455 ;; or brace list. When the first submatch matches, it's an
2456 ;; unambiguous construct, otherwise it's an ambiguous match that
2457 ;; might also be the return type of a function declaration.
2458 t (let* ((decl-kwds (append (c-lang-const c-class-decl-kwds)
2459 (c-lang-const c-other-block-decl-kwds)
2460 (c-lang-const c-inexpr-class-kwds)))
2461 (unambiguous (set-difference decl-kwds
2462 (c-lang-const c-type-start-kwds)
2463 :test 'string-equal))
2464 (ambiguous (intersection decl-kwds
2465 (c-lang-const c-type-start-kwds)
2466 :test 'string-equal)))
2468 (concat (c-make-keywords-re t unambiguous)
2470 (c-make-keywords-re t ambiguous))
2471 (c-make-keywords-re t unambiguous))))
2472 (c-lang-defvar c-decl-block-key (c-lang-const c-decl-block-key))
2474 (c-lang-defconst c-bitfield-kwds
2475 "Keywords that can introduce bitfields."
2477 (c c++ objc) '("char" "int" "long" "signed" "unsigned"))
2479 (c-lang-defconst c-opt-bitfield-key
2480 ;; Regexp matching the start of a bitfield (not uniquely), or nil in
2481 ;; languages without bitfield support.
2483 (c c++) (c-make-keywords-re t (c-lang-const c-bitfield-kwds)))
2484 (c-lang-defvar c-opt-bitfield-key (c-lang-const c-opt-bitfield-key))
2486 (c-lang-defconst c-other-kwds
2487 "Keywords not accounted for by any other `*-kwds' language constant."
2490 ;; In CORBA CIDL: (These are declaration keywords that never
2491 ;; can start a declaration.)
2492 "entity" "process" "service" "session" "storage"))
2495 ;;; Constants built from keywords.
2497 ;; Note: No `*-kwds' language constants may be defined below this point.
2500 (defconst c-kwds-lang-consts
2501 ;; List of all the language constants that contain keyword lists.
2503 (mapatoms (lambda (sym)
2504 (when (and (boundp sym)
2505 (string-match "-kwds\\'" (symbol-name sym)))
2506 ;; Make the list of globally interned symbols
2507 ;; instead of ones interned in `c-lang-constants'.
2508 (setq list (cons (intern (symbol-name sym)) list))))
2512 (c-lang-defconst c-keywords
2513 ;; All keywords as a list.
2514 t (delete-duplicates
2515 (c-lang-defconst-eval-immediately
2516 `(append ,@(mapcar (lambda (kwds-lang-const)
2517 `(c-lang-const ,kwds-lang-const))
2520 :test 'string-equal))
2522 (c-lang-defconst c-keywords-regexp
2523 ;; All keywords as an adorned regexp.
2524 t (c-make-keywords-re t (c-lang-const c-keywords)))
2525 (c-lang-defvar c-keywords-regexp (c-lang-const c-keywords-regexp))
2527 (c-lang-defconst c-keyword-member-alist
2528 ;; An alist with all the keywords in the cars. The cdr for each
2529 ;; keyword is a list of the symbols for the `*-kwds' lists that
2531 t (let ((kwd-list-alist
2532 (c-lang-defconst-eval-immediately
2533 `(list ,@(mapcar (lambda (kwds-lang-const)
2534 `(cons ',kwds-lang-const
2535 (c-lang-const ,kwds-lang-const)))
2536 c-kwds-lang-consts))))
2537 lang-const kwd-list kwd
2539 (while kwd-list-alist
2540 (setq lang-const (caar kwd-list-alist)
2541 kwd-list (cdar kwd-list-alist)
2542 kwd-list-alist (cdr kwd-list-alist))
2544 (setq kwd (car kwd-list)
2545 kwd-list (cdr kwd-list))
2546 (unless (setq elem (assoc kwd result-alist))
2547 (setq result-alist (cons (setq elem (list kwd)) result-alist)))
2548 (unless (memq lang-const (cdr elem))
2549 (setcdr elem (cons lang-const (cdr elem))))))
2552 (c-lang-defvar c-keywords-obarray
2553 ;; An obarray containing all keywords as symbols. The property list
2554 ;; of each symbol has a non-nil entry for the specific `*-kwds'
2555 ;; lists it's a member of.
2557 ;; E.g. to see whether the string str contains a keyword on
2558 ;; `c-class-decl-kwds', one can do like this:
2559 ;; (get (intern-soft str c-keyword-obarray) 'c-class-decl-kwds)
2560 ;; Which preferably is written using the associated functions in
2562 ;; (c-keyword-member (c-keyword-sym str) 'c-class-decl-kwds)
2564 ;; The obarray is not stored directly as a language constant since
2565 ;; the printed representation for obarrays used in .elc files isn't
2568 (let* ((alist (c-lang-const c-keyword-member-alist))
2570 (obarray (make-vector (* (length alist) 2) 0)))
2572 (setq kwd (caar alist)
2573 lang-const-list (cdar alist)
2575 (setplist (intern kwd obarray)
2576 ;; Emacs has an odd bug that causes `mapcan' to fail
2577 ;; with unintelligible errors. (XEmacs works.)
2578 ;;(mapcan (lambda (lang-const)
2579 ;; (list lang-const t))
2581 (apply 'nconc (mapcar (lambda (lang-const)
2582 (list lang-const t))
2586 (c-lang-defconst c-regular-keywords-regexp
2587 ;; Adorned regexp matching all keywords that should be fontified
2588 ;; with the keywords face. I.e. that aren't types or constants.
2589 t (c-make-keywords-re t
2590 (set-difference (c-lang-const c-keywords)
2591 (append (c-lang-const c-primitive-type-kwds)
2592 (c-lang-const c-constant-kwds))
2593 :test 'string-equal)))
2594 (c-lang-defvar c-regular-keywords-regexp
2595 (c-lang-const c-regular-keywords-regexp))
2597 (c-lang-defconst c-primary-expr-regexp
2598 ;; Regexp matching the start of any primary expression, i.e. any
2599 ;; literal, symbol, prefix operator, and '('. It doesn't need to
2600 ;; exclude keywords; they are excluded afterwards unless the second
2601 ;; submatch matches. If the first but not the second submatch
2602 ;; matches then it is an ambiguous primary expression; it could also
2603 ;; be a match of e.g. an infix operator. (The case with ambiguous
2604 ;; keyword operators isn't handled.)
2606 t (let* ((prefix-ops
2607 (c-filter-ops (c-lang-const c-operators)
2610 ;; Filter out the special case prefix
2611 ;; operators that are close parens.
2612 (not (string-match "\\s)" op)))))
2614 (nonkeyword-prefix-ops
2615 (c-filter-ops prefix-ops
2617 "\\`\\(\\s.\\|\\s(\\|\\s)\\)+\\'"))
2620 (c-filter-ops (c-lang-const c-operators)
2625 right-assoc-sequence)
2628 (unambiguous-prefix-ops (set-difference nonkeyword-prefix-ops
2630 :test 'string-equal))
2631 (ambiguous-prefix-ops (intersection nonkeyword-prefix-ops
2633 :test 'string-equal)))
2637 ;; Take out all symbol class operators from `prefix-ops' and make the
2638 ;; first submatch from them together with `c-primary-expr-kwds'.
2639 (c-make-keywords-re t
2640 (append (c-lang-const c-primary-expr-kwds)
2641 (set-difference prefix-ops nonkeyword-prefix-ops
2642 :test 'string-equal)))
2645 ;; Match all ambiguous operators.
2646 (c-make-keywords-re nil
2647 (intersection nonkeyword-prefix-ops in-or-postfix-ops
2648 :test 'string-equal))
2652 ;; Now match all other symbols.
2653 (c-lang-const c-symbol-start)
2656 ;; The chars that can start integer and floating point
2661 ;; The unambiguous operators from `prefix-ops'.
2662 (c-make-keywords-re nil
2663 (set-difference nonkeyword-prefix-ops in-or-postfix-ops
2664 :test 'string-equal))
2667 ;; Match string and character literals.
2669 (if (memq 'gen-string-delim c-emacs-features)
2672 (c-lang-defvar c-primary-expr-regexp (c-lang-const c-primary-expr-regexp))
2675 ;;; Additional constants for parser-level constructs.
2677 (c-lang-defconst c-decl-start-colon-kwd-re
2678 "Regexp matching a keyword that is followed by a colon, where
2679 the whole construct can precede a declaration.
2680 E.g. \"public:\" in C++."
2682 c++ (c-make-keywords-re t (c-lang-const c-protection-kwds)))
2683 (c-lang-defvar c-decl-start-colon-kwd-re
2684 (c-lang-const c-decl-start-colon-kwd-re))
2686 (c-lang-defconst c-decl-prefix-re
2687 "Regexp matching something that might precede a declaration, cast or
2688 label, such as the last token of a preceding statement or declaration.
2689 This is used in the common situation where a declaration or cast
2690 doesn't start with any specific token that can be searched for.
2692 The regexp should not match bob; that is done implicitly. It can't
2693 require a match longer than one token. The end of the token is taken
2694 to be at the end of the first submatch, which is assumed to always
2695 match. It's undefined whether identifier syntax (see
2696 `c-identifier-syntax-table') is in effect or not. This regexp is
2697 assumed to be a superset of `c-label-prefix-re' if
2698 `c-recognize-colon-labels' is set.
2700 Besides this, `c-decl-start-kwds' is used to find declarations.
2702 Note: This variable together with `c-decl-start-re' and
2703 `c-decl-start-kwds' is only used to detect \"likely\"
2704 declaration/cast/label starts. I.e. they might produce more matches
2705 but should not miss anything (or else it's necessary to use text
2706 properties - see the next note). Wherever they match, the following
2707 construct is analyzed to see if it indeed is a declaration, cast or
2708 label. That analysis is not cheap, so it's important that not too
2709 many false matches are triggered.
2711 Note: If a declaration/cast/label start can't be detected with this
2712 variable, it's necessary to use the `c-type' text property with the
2713 value `c-decl-end' on the last char of the last token preceding the
2714 declaration. See the comment blurb at the start of cc-engine.el for
2717 ;; We match a sequence of characters to skip over things like \"};\"
2718 ;; more quickly. We match ")" in C for K&R region declarations, and
2719 ;; in all languages except Java for when a cpp macro definition
2720 ;; begins with a declaration.
2721 t "\\([\{\}\(\);,]+\\)"
2722 java "\\([\{\}\(;,<]+\\)"
2723 ;; Match "<" in C++ to get the first argument in a template arglist.
2724 ;; In that case there's an additional check in `c-find-decl-spots'
2725 ;; that it got open paren syntax. Match ":" to aid in picking up
2726 ;; "public:", etc. This involves additional checks in
2727 ;; `c-find-decl-prefix-search' to prevent a match of identifiers
2729 c++ "\\([\{\}\(\);:,<]+\\)"
2730 ;; Additionally match the protection directives in Objective-C.
2731 ;; Note that this doesn't cope with the longer directives, which we
2732 ;; would have to match from start to end since they don't end with
2733 ;; any easily recognized characters.
2734 objc (concat "\\([\{\}\(\);,]+\\|"
2735 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
2737 ;; Pike is like C but we also match "[" for multiple value
2738 ;; assignments and type casts.
2739 pike "\\([\{\}\(\)\[;,]+\\)")
2740 (c-lang-defvar c-decl-prefix-re (c-lang-const c-decl-prefix-re)
2743 (c-lang-defconst c-decl-start-re
2744 "Regexp matching the start of any declaration, cast or label.
2745 It's used on the token after the one `c-decl-prefix-re' matched. This
2746 regexp should not try to match those constructs accurately as it's
2747 only used as a sieve to avoid spending more time checking other
2749 t (c-lang-const c-identifier-start))
2750 (c-lang-defvar c-decl-start-re (c-lang-const c-decl-start-re))
2752 (c-lang-defconst c-decl-prefix-or-start-re
2753 ;; Regexp matching something that might precede or start a
2754 ;; declaration, cast or label.
2756 ;; If the first submatch matches, it's taken to match the end of a
2757 ;; token that might precede such a construct, e.g. ';', '}' or '{'.
2758 ;; It's built from `c-decl-prefix-re'.
2760 ;; If the first submatch did not match, the match of the whole
2761 ;; regexp is taken to be at the first token in the declaration.
2762 ;; `c-decl-start-re' is not checked in this case.
2764 ;; Design note: The reason the same regexp is used to match both
2765 ;; tokens that precede declarations and start them is to avoid an
2766 ;; extra regexp search from the previous declaration spot in
2767 ;; `c-find-decl-spots'. Users of `c-find-decl-spots' also count on
2768 ;; that it finds all declaration/cast/label starts in approximately
2769 ;; linear order, so we can't do the searches in two separate passes.
2770 t (if (c-lang-const c-decl-start-kwds)
2771 (concat (c-lang-const c-decl-prefix-re)
2773 (c-make-keywords-re t (c-lang-const c-decl-start-kwds)))
2774 (c-lang-const c-decl-prefix-re)))
2775 (c-lang-defvar c-decl-prefix-or-start-re
2776 (c-lang-const c-decl-prefix-or-start-re)
2779 (c-lang-defconst c-cast-parens
2780 ;; List containing the paren characters that can open a cast, or nil in
2781 ;; languages without casts.
2782 t (c-filter-ops (c-lang-const c-operators)
2785 (lambda (op) (elt op 0))))
2786 (c-lang-defvar c-cast-parens (c-lang-const c-cast-parens))
2788 (c-lang-defconst c-block-prefix-disallowed-chars
2789 "List of syntactically relevant characters that never can occur before
2790 the open brace in any construct that contains a brace block, e.g. in
2791 the \"class Foo: public Bar\" part of:
2793 class Foo: public Bar {int x();} a, *b;
2795 If parens can occur, the chars inside those aren't filtered with this
2798 '<' and '>' should be disallowed even if angle bracket arglists can
2799 occur. That since the search function needs to stop at them anyway to
2800 ensure they are given paren syntax.
2802 This is used to skip backward from the open brace to find the region
2803 in which to look for a construct like \"class\", \"enum\",
2804 \"namespace\" or whatever. That skipping should be as tight as
2805 possible for good performance."
2807 ;; Default to all chars that only occurs in nonsymbol tokens outside
2810 (c-lang-const c-nonsymbol-token-char-list)
2811 (c-filter-ops (append (c-lang-const c-identifier-ops)
2813 (c-lang-const c-after-id-concat-ops))))
2818 (while (string-match "\\(\\s.\\|\\s(\\|\\s)\\)"
2820 (setq res (cons (aref op (match-beginning 1)) res)
2824 ;; Allow cpp operations (where applicable).
2825 t (if (c-lang-const c-opt-cpp-prefix)
2826 (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2828 (c-lang-const c-block-prefix-disallowed-chars))
2830 ;; Allow ':' for inherit list starters.
2831 (c++ objc idl) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2834 ;; Allow ',' for multiple inherits.
2835 (c++ java) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2838 ;; Allow parentheses for anonymous inner classes in Java and class
2839 ;; initializer lists in Pike.
2840 (java pike) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2843 ;; Allow '"' for extern clauses (e.g. extern "C" {...}).
2844 (c c++ objc) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2847 (c-lang-defconst c-block-prefix-charset
2848 ;; `c-block-prefix-disallowed-chars' as an inverted charset suitable
2849 ;; for `c-syntactic-skip-backward'.
2850 t (c-make-bare-char-alt (c-lang-const c-block-prefix-disallowed-chars) t))
2851 (c-lang-defvar c-block-prefix-charset (c-lang-const c-block-prefix-charset))
2853 (c-lang-defconst c-type-decl-prefix-key
2854 "Regexp matching any declarator operator that might precede the
2855 identifier in a declaration, e.g. the \"*\" in \"char *argv\". This
2856 regexp should match \"(\" if parentheses are valid in declarators.
2857 The end of the first submatch is taken as the end of the operator.
2858 Identifier syntax is in effect when this is matched \(see
2859 `c-identifier-syntax-table')."
2860 t (if (c-lang-const c-type-modifier-kwds)
2861 (concat (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>")
2862 ;; Default to a regexp that never matches.
2864 ;; Check that there's no "=" afterwards to avoid matching tokens
2866 (c objc) (concat "\\("
2869 (c-lang-const c-type-decl-prefix-key)
2875 (c-lang-const c-type-decl-prefix-key)
2878 ;; If this matches there's special treatment in
2879 ;; `c-font-lock-declarators' and
2880 ;; `c-font-lock-declarations' that check for a
2881 ;; complete name followed by ":: *".
2882 (c-lang-const c-identifier-start)
2886 pike "\\(\\*\\)\\([^=]\\|$\\)")
2887 (c-lang-defvar c-type-decl-prefix-key (c-lang-const c-type-decl-prefix-key)
2890 (c-lang-defconst c-type-decl-suffix-key
2891 "Regexp matching the declarator operators that might follow after the
2892 identifier in a declaration, e.g. the \"[\" in \"char argv[]\". This
2893 regexp should match \")\" if parentheses are valid in declarators. If
2894 it matches an open paren of some kind, the type declaration check
2895 continues at the corresponding close paren, otherwise the end of the
2896 first submatch is taken as the end of the operator. Identifier syntax
2897 is in effect when this is matched (see `c-identifier-syntax-table')."
2898 ;; Default to a regexp that matches `c-type-modifier-kwds' and a
2899 ;; function argument list parenthesis.
2900 t (if (c-lang-const c-type-modifier-kwds)
2902 (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>"
2905 (c c++ objc) (concat
2908 (if (c-lang-const c-type-modifier-kwds)
2911 ;; "throw" in `c-type-modifier-kwds' is followed
2912 ;; by a parenthesis list, but no extra measures
2913 ;; are necessary to handle that.
2914 (regexp-opt (c-lang-const c-type-modifier-kwds) t)
2918 java "\\([\[\(\)]\\)"
2920 (c-lang-defvar c-type-decl-suffix-key (c-lang-const c-type-decl-suffix-key)
2923 (c-lang-defconst c-after-suffixed-type-decl-key
2924 "This regexp is matched after a declarator expression where
2925 `c-type-decl-suffix-key' has matched. If it matches then the
2926 construct is taken as a declaration. It's typically used to match the
2927 beginning of a function body or whatever might occur after the
2928 function header in a function declaration or definition. It's
2929 undefined whether identifier syntax (see `c-identifier-syntax-table')
2930 is in effect or not.
2932 Note that it's used in cases like after \"foo (bar)\" so it should
2933 only match when it's certain that it's a declaration, e.g., \"{\" but
2934 not \",\" or \";\"."
2936 ;; If K&R style declarations should be recognized then one could
2937 ;; consider to match the start of any symbol since we want to match
2938 ;; the start of the first declaration in the "K&R region". That
2939 ;; could however produce false matches on code like "FOO(bar) x"
2940 ;; where FOO is a cpp macro, so it's better to leave it out and rely
2941 ;; on the other heuristics in that case.
2942 t (if (c-lang-const c-postfix-spec-kwds)
2943 ;; Add on the keywords in `c-postfix-spec-kwds'.
2944 (concat (c-lang-const c-after-suffixed-type-decl-key)
2946 (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
2947 (c-lang-const c-after-suffixed-type-decl-key))
2948 ;; Also match the colon that starts a base class initializer list in
2949 ;; C++. That can be confused with a function call before the colon
2950 ;; in a ? : operator, but we count on that `c-decl-prefix-re' won't
2951 ;; match before such a thing (as a declaration-level construct;
2952 ;; matches inside arglist contexts are already excluded).
2954 (c-lang-defvar c-after-suffixed-type-decl-key
2955 (c-lang-const c-after-suffixed-type-decl-key)
2958 (c-lang-defconst c-after-suffixed-type-maybe-decl-key
2959 ;; Regexp that in addition to `c-after-suffixed-type-decl-key'
2960 ;; matches ";" and ",".
2961 t (concat "\\(" (c-lang-const c-after-suffixed-type-decl-key) "\\)"
2963 (c-lang-defvar c-after-suffixed-type-maybe-decl-key
2964 (c-lang-const c-after-suffixed-type-maybe-decl-key))
2966 (c-lang-defconst c-opt-type-concat-key
2967 "Regexp matching operators that concatenate types, e.g. the \"|\" in
2968 \"int|string\" in Pike. The end of the first submatch is taken as the
2969 end of the operator. nil in languages without such operators. It's
2970 undefined whether identifier syntax (see `c-identifier-syntax-table')
2971 is in effect or not."
2973 pike "\\([|.&]\\)\\($\\|[^|.&]\\)")
2974 (c-lang-defvar c-opt-type-concat-key (c-lang-const c-opt-type-concat-key)
2977 (c-lang-defconst c-opt-type-suffix-key
2978 "Regexp matching operators that might follow after a type, or nil in
2979 languages that don't have such operators. The end of the first
2980 submatch is taken as the end of the operator. This should not match
2981 things like C++ template arglists if `c-recognize-<>-arglists' is set.
2982 It's undefined whether identifier syntax (see `c-identifier-syntax-table')
2983 is in effect or not."
2985 (c c++ objc pike) "\\(\\.\\.\\.\\)"
2986 java (concat "\\(\\[" (c-lang-const c-simple-ws) "*\\]\\|\\.\\.\\.\\)"))
2987 (c-lang-defvar c-opt-type-suffix-key (c-lang-const c-opt-type-suffix-key))
2989 (c-lang-defvar c-known-type-key
2990 ;; Regexp matching the known type identifiers. This is initialized
2991 ;; from the type keywords and `*-font-lock-extra-types'. The first
2992 ;; submatch is the one that matches the type. Note that this regexp
2993 ;; assumes that symbol constituents like '_' and '$' have word
2996 (when (boundp (c-mode-symbol "font-lock-extra-types"))
2997 (c-mode-var "font-lock-extra-types")))
3000 (mapcar (lambda (re)
3001 (when (string-match "[][.*+?^$\\]" re)
3006 (mapcar (lambda (re)
3007 (unless (string-match "[][.*+?^$\\]" re)
3012 (append (list (c-make-keywords-re nil
3013 (append (c-lang-const c-primitive-type-kwds)
3019 (c-lang-defconst c-special-brace-lists
3020 "List of open- and close-chars that makes up a pike-style brace list,
3021 i.e. for a ([Â ]) list there should be a cons (?\\[ . ?\\]) in this
3024 pike '((?{ . ?}) (?\[ . ?\]) (?< . ?>)))
3025 (c-lang-defvar c-special-brace-lists (c-lang-const c-special-brace-lists))
3027 (c-lang-defconst c-recognize-knr-p
3028 "Non-nil means K&R style argument declarations are valid."
3031 (c-lang-defvar c-recognize-knr-p (c-lang-const c-recognize-knr-p))
3033 (c-lang-defconst c-recognize-typeless-decls
3034 "Non-nil means function declarations without return type should be
3035 recognized. That can introduce an ambiguity with parenthesized macro
3036 calls before a brace block. This setting does not affect declarations
3037 that are preceded by a declaration starting keyword, so
3038 e.g. `c-typeless-decl-kwds' may still be used when it's set to nil."
3040 (c c++ objc java) t)
3041 (c-lang-defvar c-recognize-typeless-decls
3042 (c-lang-const c-recognize-typeless-decls))
3044 (c-lang-defconst c-recognize-<>-arglists
3045 "Non-nil means C++ style template arglists should be handled. More
3046 specifically, this means a comma separated list of types or
3047 expressions surrounded by \"<\" and \">\". It's always preceded by an
3048 identifier or one of the keywords on `c-<>-type-kwds' or
3049 `c-<>-arglist-kwds'. If there's an identifier before then the whole
3050 expression is considered to be a type."
3051 t (or (consp (c-lang-const c-<>-type-kwds))
3052 (consp (c-lang-const c-<>-arglist-kwds)))
3053 java t) ; 2008-10-19. This is crude. The syntax for java
3054 ; generics is not yet coded in CC Mode.
3055 (c-lang-defvar c-recognize-<>-arglists (c-lang-const c-recognize-<>-arglists))
3057 (c-lang-defconst c-enums-contain-decls
3058 "Non-nil means that an enum structure can contain declarations."
3061 (c-lang-defvar c-enums-contain-decls (c-lang-const c-enums-contain-decls))
3063 (c-lang-defconst c-recognize-paren-inits
3064 "Non-nil means that parenthesis style initializers exist,
3065 i.e. constructs like
3069 in addition to the more classic
3074 (c-lang-defvar c-recognize-paren-inits (c-lang-const c-recognize-paren-inits))
3076 (c-lang-defconst c-recognize-paren-inexpr-blocks
3077 "Non-nil to recognize gcc style in-expression blocks,
3078 i.e. compound statements surrounded by parentheses inside expressions."
3081 (c-lang-defvar c-recognize-paren-inexpr-blocks
3082 (c-lang-const c-recognize-paren-inexpr-blocks))
3084 (c-lang-defconst c-opt-<>-arglist-start
3085 ;; Regexp matching the start of angle bracket arglists in languages
3086 ;; where `c-recognize-<>-arglists' is set. Does not exclude
3087 ;; keywords outside `c-<>-arglist-kwds'. The first submatch is
3088 ;; assumed to surround the preceding symbol. The whole match is
3089 ;; assumed to end directly after the opening "<".
3090 t (if (c-lang-const c-recognize-<>-arglists)
3092 (c-lang-const c-symbol-key)
3094 (c-lang-const c-syntactic-ws)
3096 (c-lang-defvar c-opt-<>-arglist-start (c-lang-const c-opt-<>-arglist-start))
3098 (c-lang-defconst c-opt-<>-arglist-start-in-paren
3099 ;; Regexp that in addition to `c-opt-<>-arglist-start' matches close
3100 ;; parens. The first submatch is assumed to surround
3101 ;; `c-opt-<>-arglist-start'.
3102 t (if (c-lang-const c-opt-<>-arglist-start)
3104 (c-lang-const c-opt-<>-arglist-start)
3106 (c-lang-defvar c-opt-<>-arglist-start-in-paren
3107 (c-lang-const c-opt-<>-arglist-start-in-paren))
3109 (c-lang-defconst c-opt-postfix-decl-spec-key
3110 ;; Regexp matching the beginning of a declaration specifier in the
3111 ;; region between the header and the body of a declaration.
3113 ;; TODO: This is currently not used uniformly; c++-mode and
3114 ;; java-mode each have their own ways of using it.
3117 (c-lang-const c-simple-ws) "*"
3118 "\\(virtual" (c-lang-const c-simple-ws) "+\\)?\\("
3119 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
3120 "\\)" (c-lang-const c-simple-ws) "+"
3121 "\\(" (c-lang-const c-symbol-key) "\\)")
3122 java (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
3123 (c-lang-defvar c-opt-postfix-decl-spec-key
3124 (c-lang-const c-opt-postfix-decl-spec-key))
3126 (c-lang-defconst c-recognize-colon-labels
3127 "Non-nil if generic labels ending with \":\" should be recognized.
3128 That includes labels in code and access keys in classes. This does
3129 not apply to labels recognized by `c-label-kwds' and
3130 `c-opt-extra-label-key'."
3132 (c c++ objc java pike) t)
3133 (c-lang-defvar c-recognize-colon-labels
3134 (c-lang-const c-recognize-colon-labels))
3136 (c-lang-defconst c-label-prefix-re
3137 "Regexp like `c-decl-prefix-re' that matches any token that can precede
3138 a generic colon label. Not used if `c-recognize-colon-labels' is
3141 (c-lang-defvar c-label-prefix-re
3142 (c-lang-const c-label-prefix-re))
3144 (c-lang-defconst c-nonlabel-token-key
3145 "Regexp matching things that can't occur in generic colon labels,
3146 neither in a statement nor in a declaration context. The regexp is
3147 tested at the beginning of every sexp in a suspected label,
3148 i.e. before \":\". Only used if `c-recognize-colon-labels' is set."
3150 ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
3151 (c-make-keywords-re t
3152 (set-difference (c-lang-const c-keywords)
3153 (append (c-lang-const c-label-kwds)
3154 (c-lang-const c-protection-kwds))
3155 :test 'string-equal)))
3156 ;; Don't allow string literals, except in AWK. Character constants are OK.
3157 (c objc java pike idl) (concat "\"\\|"
3158 (c-lang-const c-nonlabel-token-key))
3159 ;; Also check for open parens in C++, to catch member init lists in
3160 ;; constructors. We normally allow it so that macros with arguments
3162 c++ (concat "\\s\(\\|\"\\|" (c-lang-const c-nonlabel-token-key)))
3163 (c-lang-defvar c-nonlabel-token-key (c-lang-const c-nonlabel-token-key))
3165 (c-lang-defconst c-nonlabel-token-2-key
3166 "Regexp matching things that can't occur two symbols before a colon in
3167 a label construct. This catches C++'s inheritance construct \"class foo
3168 : bar\". Only used if `c-recognize-colon-labels' is set."
3169 t "\\<\\>" ; matches nothing
3170 c++ (c-make-keywords-re t '("class")))
3171 (c-lang-defvar c-nonlabel-token-2-key (c-lang-const c-nonlabel-token-2-key))
3173 (c-lang-defconst c-opt-extra-label-key
3174 "Optional regexp matching labels.
3175 Normally, labels are detected according to `c-nonlabel-token-key',
3176 `c-decl-prefix-re' and `c-nonlabel-decl-prefix-re'. This regexp can
3177 be used if there are additional labels that aren't recognized that
3180 objc (c-make-keywords-re t (c-lang-const c-protection-kwds)))
3181 (c-lang-defvar c-opt-extra-label-key (c-lang-const c-opt-extra-label-key))
3183 (c-lang-defconst c-opt-friend-key
3184 ;; Regexp describing friend declarations classes, or nil in
3185 ;; languages that don't have such things.
3187 ;; TODO: Ought to use `c-prefix-spec-kwds-re' or similar, and the
3188 ;; template skipping isn't done properly. This will disappear soon.
3190 c++ (concat "friend" (c-lang-const c-simple-ws) "+"
3193 (c-lang-const c-simple-ws) "*"
3195 (c-lang-const c-simple-ws) "*"
3197 (c-lang-const c-simple-ws) "+")))
3198 (c-lang-defvar c-opt-friend-key (c-lang-const c-opt-friend-key))
3200 (c-lang-defconst c-opt-method-key
3201 ;; Special regexp to match the start of Objective-C methods. The
3202 ;; first submatch is assumed to end after the + or - key.
3205 ;; TODO: Ought to use a better method than anchoring on bol.
3208 (c-lang-const c-simple-ws) "*"
3209 (concat "\\(" ; Return type.
3211 (c-lang-const c-simple-ws) "*"
3213 "\\(" (c-lang-const c-symbol-key) "\\)"))
3214 (c-lang-defvar c-opt-method-key (c-lang-const c-opt-method-key))
3216 (c-lang-defconst c-type-decl-end-used
3217 ;; Must be set in buffers where the `c-type' text property might be
3218 ;; used with the value `c-decl-end'.
3220 ;; `c-decl-end' is used to mark the ends of labels and access keys
3221 ;; to make interactive refontification work better.
3222 t (or (c-lang-const c-recognize-colon-labels)
3223 (and (c-lang-const c-label-kwds) t))
3224 ;; `c-decl-end' is used to mark the end of the @-style directives in
3227 (c-lang-defvar c-type-decl-end-used (c-lang-const c-type-decl-end-used))
3230 ;;; Wrap up the `c-lang-defvar' system.
3232 ;; Compile in the list of language variables that has been collected
3233 ;; with the `c-lang-defvar' and `c-lang-setvar' macros. Note that the
3234 ;; first element of each is nil.
3235 (defconst c-lang-variable-inits (cc-eval-when-compile c-lang-variable-inits))
3236 (defconst c-emacs-variable-inits (cc-eval-when-compile c-emacs-variable-inits))
3238 ;; Make the `c-lang-setvar' variables buffer local in the current buffer.
3239 ;; These are typically standard emacs variables such as `comment-start'.
3240 (defmacro c-make-emacs-variables-local ()
3242 ,@(mapcar (lambda (init)
3243 `(make-local-variable ',(car init)))
3244 (cdr c-emacs-variable-inits))))
3246 (defun c-make-init-lang-vars-fun (mode)
3247 "Create a function that initializes all the language dependent variables
3250 This function should be evaluated at compile time, so that the
3251 function it returns is byte compiled with all the evaluated results
3252 from the language constants. Use the `c-init-language-vars' macro to
3253 accomplish that conveniently."
3255 (if (and (not load-in-progress)
3256 (boundp 'byte-compile-dest-file)
3257 (stringp byte-compile-dest-file))
3259 ;; No need to byte compile this lambda since the byte compiler is
3260 ;; smart enough to detect the `funcall' construct in the
3261 ;; `c-init-language-vars' macro below and compile it all straight
3262 ;; into the function that contains `c-init-language-vars'.
3265 ;; This let sets up the context for `c-mode-var' and similar
3266 ;; that could be in the result from `c--macroexpand-all'.
3267 (let ((c-buffer-is-cc-mode ',mode)
3268 current-var source-eval)
3269 (c-make-emacs-variables-local)
3272 (if (eq c-version-sym ',c-version-sym)
3273 (setq ,@(let ((c-buffer-is-cc-mode mode)
3274 (c-lang-const-expansion 'immediate))
3275 ;; `c-lang-const' will expand to the evaluated
3276 ;; constant immediately in `c--macroexpand-all'
3280 `(current-var ',(car init)
3281 ,(car init) ,(c--macroexpand-all
3283 ;; Note: The following `append' copies the
3284 ;; first argument. That list is small, so
3285 ;; this doesn't matter too much.
3286 (append (cdr c-emacs-variable-inits)
3287 (cdr c-lang-variable-inits)))))
3289 ;; This diagnostic message isn't useful for end
3290 ;; users, so it's disabled.
3291 ;;(unless (get ',mode 'c-has-warned-lang-consts)
3292 ;; (message ,(concat "%s compiled with CC Mode %s "
3293 ;; "but loaded with %s - evaluating "
3294 ;; "language constants from source")
3295 ;; ',mode ,c-version c-version)
3296 ;; (put ',mode 'c-has-warned-lang-consts t))
3298 (setq source-eval t)
3299 (let ((init ',(append (cdr c-emacs-variable-inits)
3300 (cdr c-lang-variable-inits))))
3302 (setq current-var (caar init))
3303 (set (caar init) (eval (cadar init)))
3304 (setq init (cdr init)))))
3308 (message "Eval error in the `c-lang-defvar' or `c-lang-setvar' for `%s'%s: %S"
3312 (fallback source eval - %s compiled with CC Mode %s but loaded with %s)"
3313 ',mode ,c-version c-version)
3316 (signal (car err) (cdr err)))))))
3318 ;; Being evaluated from source. Always use the dynamic method to
3319 ;; work well when `c-lang-defvar's in this file are reevaluated
3323 (let ((c-buffer-is-cc-mode ',mode)
3324 (init (append (cdr c-emacs-variable-inits)
3325 (cdr c-lang-variable-inits)))
3327 (c-make-emacs-variables-local)
3331 (setq current-var (caar init))
3332 (set (caar init) (eval (cadar init)))
3333 (setq init (cdr init)))
3338 "Eval error in the `c-lang-defvar' or `c-lang-setver' for `%s' (source eval): %S"
3340 (signal (car err) (cdr err)))))))
3343 (defmacro c-init-language-vars (mode)
3344 "Initialize all the language dependent variables for the given mode.
3345 This macro is expanded at compile time to a form tailored for the mode
3346 in question, so MODE must be a constant. Therefore MODE is not
3347 evaluated and should not be quoted."
3348 `(funcall ,(c-make-init-lang-vars-fun mode)))
3351 (cc-provide 'cc-langs)
3353 ;;; cc-langs.el ends here