1 ;;; cc-langs.el --- language specific settings for CC Mode -*- coding: utf-8 -*-
3 ;; Copyright (C) 1985, 1987, 1992-2016 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 (if (eq c--mapcan-status 'cl-mapcan) 'cl-lib '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 ;; OP-FILTER selects the operators. It is either t to select all
232 ;; operators, a string to select all operators for which `string-match'
233 ;; matches the operator with the string, or a function which will be
234 ;; called with the operator and should return non-nil when the operator
235 ;; is to be selected.
237 ;; If XLATE is given, it's a function which is called for each
238 ;; matching operator and its return value is collected instead.
239 ;; If it returns a list, the elements are spliced directly into
240 ;; the final result, which is returned as a list with duplicates
241 ;; removed using `equal'.
243 ;; `c-mode-syntax-table' for the current mode is in effect during
244 ;; the whole procedure.
245 (unless (listp (car-safe ops))
246 (setq ops (list ops)))
247 (cond ((eq opgroup-filter t)
248 (setq opgroup-filter (lambda (opgroup) t)))
249 ((not (functionp opgroup-filter))
250 (setq opgroup-filter `(lambda (opgroup)
251 (memq opgroup ',opgroup-filter)))))
252 (cond ((eq op-filter t)
253 (setq op-filter (lambda (op) t)))
255 (setq op-filter `(lambda (op)
256 (string-match ,op-filter op)))))
258 (setq xlate 'identity))
259 (c-with-syntax-table (c-lang-const c-mode-syntax-table)
260 (c--delete-duplicates
261 (c--mapcan (lambda (opgroup)
262 (when (if (symbolp (car opgroup))
263 (when (funcall opgroup-filter (car opgroup))
264 (setq opgroup (cdr opgroup))
267 (c--mapcan (lambda (op)
268 (when (funcall op-filter op)
269 (let ((res (funcall xlate op)))
270 (if (listp res) res (list res)))))
276 ;;; Various mode specific values that aren't language related.
278 (c-lang-defconst c-mode-menu
279 ;; The definition for the mode menu. The menu title is prepended to
280 ;; this before it's fed to `easy-menu-define'.
281 t `(["Comment Out Region" comment-region
282 (c-fn-region-is-active-p)]
283 ["Uncomment Region" (comment-region (region-beginning)
285 (c-fn-region-is-active-p)]
286 ["Indent Expression" c-indent-exp
287 (memq (char-after) '(?\( ?\[ ?\{))]
288 ["Indent Line or Region" c-indent-line-or-region t]
289 ["Fill Comment Paragraph" c-fill-paragraph t]
291 ["Backward Statement" c-beginning-of-statement t]
292 ["Forward Statement" c-end-of-statement t]
293 ,@(when (c-lang-const c-opt-cpp-prefix)
294 ;; Only applicable if there's a cpp preprocessor.
295 `(["Up Conditional" c-up-conditional t]
296 ["Backward Conditional" c-backward-conditional t]
297 ["Forward Conditional" c-forward-conditional t]
299 ["Macro Expand Region" c-macro-expand
300 (c-fn-region-is-active-p)]
301 ["Backslashify" c-backslash-region
302 (c-fn-region-is-active-p)]))
305 ["Set Style..." c-set-style t]
306 ["Show Current Style Name" (message
310 ["Guess Style from this Buffer" c-guess-buffer-no-install t]
311 ["Install the Last Guessed Style..." c-guess-install
312 (and c-guess-guessed-offsets-alist
313 c-guess-guessed-basic-offset) ]
314 ["View the Last Guessed Style" c-guess-view
315 (and c-guess-guessed-offsets-alist
316 c-guess-guessed-basic-offset) ])
319 ["Syntactic indentation" c-toggle-syntactic-indentation
320 :style toggle :selected c-syntactic-indentation]
321 ["Electric mode" c-toggle-electric-state
322 :style toggle :selected c-electric-flag]
323 ["Auto newline" c-toggle-auto-newline
324 :style toggle :selected c-auto-newline]
325 ["Hungry delete" c-toggle-hungry-state
326 :style toggle :selected c-hungry-delete-key]
327 ["Subword mode" c-subword-mode
328 :style toggle :selected (and (boundp 'c-subword-mode)
334 (defun c-populate-syntax-table (table)
335 "Populate the given syntax table as necessary for a C-like language.
336 This includes setting \\=' and \" as string delimiters, and setting up
337 the comment syntax to handle both line style \"//\" and block style
338 \"/*\" \"*/\" comments."
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 ?% "." table)
346 (modify-syntax-entry ?< "." table)
347 (modify-syntax-entry ?> "." table)
348 (modify-syntax-entry ?& "." table)
349 (modify-syntax-entry ?| "." table)
350 (modify-syntax-entry ?\' "\"" table)
351 (modify-syntax-entry ?\240 "." table)
353 ;; Set up block and line oriented comments. The new C
354 ;; standard mandates both comment styles even in C, so since
355 ;; all languages now require dual comments, we make this the
359 ((memq '8-bit c-emacs-features)
360 (modify-syntax-entry ?/ ". 1456" table)
361 (modify-syntax-entry ?* ". 23" table))
363 ((memq '1-bit c-emacs-features)
364 (modify-syntax-entry ?/ ". 124b" table)
365 (modify-syntax-entry ?* ". 23" table))
367 (t (error "CC Mode is incompatible with this version of Emacs")))
369 (modify-syntax-entry ?\n "> b" table)
370 ;; Give CR the same syntax as newline, for selective-display
371 (modify-syntax-entry ?\^m "> b" table))
373 (c-lang-defconst c-make-mode-syntax-table
374 "Functions that generates the mode specific syntax tables.
375 The syntax tables aren't stored directly since they're quite large."
377 (let ((table (make-syntax-table)))
378 (c-populate-syntax-table table)
379 ;; Mode specific syntaxes.
380 ,(cond ((or (c-major-mode-is 'objc-mode) (c-major-mode-is 'java-mode))
381 ;; Let '@' be part of symbols in ObjC to cope with
382 ;; its compiler directives as single keyword tokens.
383 ;; This is then necessary since it's assumed that
384 ;; every keyword is a single symbol.
385 `(modify-syntax-entry ?@ "_" table))
386 ((c-major-mode-is 'pike-mode)
387 `(modify-syntax-entry ?@ "." table)))
390 (c-lang-defconst c-mode-syntax-table
391 ;; The syntax tables in evaluated form. Only used temporarily when
392 ;; the constants in this file are evaluated.
393 t (funcall (c-lang-const c-make-mode-syntax-table)))
395 (c-lang-defconst c++-make-template-syntax-table
396 ;; A variant of `c++-mode-syntax-table' that defines `<' and `>' as
397 ;; parenthesis characters. Used temporarily when template argument
398 ;; lists are parsed. Note that this encourages incorrect parsing of
399 ;; templates since they might contain normal operators that uses the
400 ;; '<' and '>' characters. Therefore this syntax table might go
401 ;; away when CC Mode handles templates correctly everywhere. WHILE
402 ;; THIS SYNTAX TABLE IS CURRENT, `c-parse-state' MUST _NOT_ BE
405 (java c++) `(lambda ()
406 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
407 (modify-syntax-entry ?< "(>" table)
408 (modify-syntax-entry ?> ")<" table)
410 (c-lang-defvar c++-template-syntax-table
411 (and (c-lang-const c++-make-template-syntax-table)
412 ;; The next eval remove a superfluous ' from '(lambda. This
413 ;; gets rid of compilation warnings.
414 (funcall (eval (c-lang-const c++-make-template-syntax-table)))))
416 (c-lang-defconst c-make-no-parens-syntax-table
417 ;; A variant of the standard syntax table which is used to find matching
418 ;; "<"s and ">"s which have been marked as parens using syntax table
419 ;; properties. The other paren characters (e.g. "{", ")" "]") are given a
420 ;; non-paren syntax here. so that the list commands will work on "< ... >"
421 ;; even when there's unbalanced other parens inside them.
423 ;; This variable is nil for languages which don't have template stuff.
424 t (if (c-lang-const c-recognize-<>-arglists)
426 ;(if (c-lang-const c-recognize-<>-arglists)
427 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
428 (modify-syntax-entry ?\( "." table)
429 (modify-syntax-entry ?\) "." table)
430 (modify-syntax-entry ?\[ "." table)
431 (modify-syntax-entry ?\] "." table)
432 (modify-syntax-entry ?\{ "." table)
433 (modify-syntax-entry ?\} "." table)
435 (c-lang-defvar c-no-parens-syntax-table
436 (and (c-lang-const c-make-no-parens-syntax-table)
437 ;; See comment in `c++template-syntax-table' about the next `eval'.
438 (funcall (eval (c-lang-const c-make-no-parens-syntax-table)))))
440 (c-lang-defconst c-identifier-syntax-modifications
441 "A list that describes the modifications that should be done to the
442 mode syntax table to get a syntax table that matches all identifiers
443 and keywords as words.
445 The list is just like the one used in `font-lock-defaults': Each
446 element is a cons where the car is the character to modify and the cdr
447 the new syntax, as accepted by `modify-syntax-entry'."
448 ;; The $ character is not allowed in most languages (one exception
449 ;; is Java which allows it for legacy reasons) but we still classify
450 ;; it as an identifier character since it's often used in various
451 ;; machine generated identifiers.
452 t '((?_ . "w") (?$ . "w"))
453 (objc java) (append '((?@ . "w"))
454 (c-lang-const c-identifier-syntax-modifications))
456 (c-lang-defvar c-identifier-syntax-modifications
457 (c-lang-const c-identifier-syntax-modifications))
459 (c-lang-defvar c-identifier-syntax-table
460 (let ((table (copy-syntax-table (c-mode-var "mode-syntax-table")))
461 (mods c-identifier-syntax-modifications)
466 (modify-syntax-entry (car mod) (cdr mod) table))
468 "Syntax table built on the mode syntax table but additionally
469 classifies symbol constituents like `_' and `$' as word constituents,
470 so that all identifiers are recognized as words.")
472 (c-lang-defconst c-get-state-before-change-functions
473 ;; For documentation see the following c-lang-defvar of the same name.
474 ;; The value here may be a list of functions or a single function.
476 c++ '(c-extend-region-for-CPP
477 c-before-change-check-<>-operators
478 c-invalidate-macro-cache)
479 (c objc) '(c-extend-region-for-CPP
480 c-invalidate-macro-cache)
481 ;; java 'c-before-change-check-<>-operators
482 awk 'c-awk-record-region-clear-NL)
483 (c-lang-defvar c-get-state-before-change-functions
484 (let ((fs (c-lang-const c-get-state-before-change-functions)))
488 "If non-nil, a list of functions called from c-before-change-hook.
489 Typically these will record enough state to allow
490 `c-before-font-lock-function' to extend the region to fontify,
491 and may do such things as removing text-properties which must be
494 These functions will be run in the order given. Each of them
495 takes 2 parameters, the BEG and END supplied to every
496 before-change function; on entry, the buffer will have been
497 widened and match-data will have been saved; point is undefined
498 on both entry and exit; the return value is ignored.
500 The functions are called even when font locking isn't enabled.
502 When the mode is initialized, the functions are called with
503 parameters \(point-min) and \(point-max).")
505 (c-lang-defconst c-before-font-lock-functions
506 ;; For documentation see the following c-lang-defvar of the same name.
507 ;; The value here may be a list of functions or a single function.
508 t 'c-change-expand-fl-region
509 (c objc) '(c-extend-font-lock-region-for-macros
510 c-neutralize-syntax-in-and-mark-CPP
511 c-change-expand-fl-region)
512 c++ '(c-extend-font-lock-region-for-macros
513 c-neutralize-syntax-in-and-mark-CPP
514 c-restore-<>-properties
515 c-change-expand-fl-region)
516 java '(c-restore-<>-properties
517 c-change-expand-fl-region)
518 awk 'c-awk-extend-and-syntax-tablify-region)
519 (c-lang-defvar c-before-font-lock-functions
520 (let ((fs (c-lang-const c-before-font-lock-functions)))
524 "If non-nil, a list of functions called just before font locking.
525 Typically they will extend the region about to be fontified \(see
526 below) and will set `syntax-table' text properties on the region.
528 These functions will be run in the order given. Each of them
529 takes 3 parameters, the BEG, END, and OLD-LEN supplied to every
530 after-change function; point is undefined on both entry and exit;
531 on entry, the buffer will have been widened and match-data will
532 have been saved; the return value is ignored.
534 The functions may extend the region to be fontified by setting the
535 buffer local variables c-new-BEG and c-new-END.
537 The functions are called even when font locking is disabled.
539 When the mode is initialized, these functions are called with
540 parameters \(point-min), \(point-max) and <buffer size>.")
542 (c-lang-defconst c-before-context-fontification-functions
543 t 'c-context-expand-fl-region
545 ;; For documentation see the following c-lang-defvar of the same name.
546 ;; The value here may be a list of functions or a single function.
547 (c-lang-defvar c-before-context-fontification-functions
548 (let ((fs (c-lang-const c-before-context-fontification-functions)))
552 "If non-nil, a list of functions called just before context (or
553 other non-change) fontification is done. Typically they will
556 These functions will be run in the order given. Each of them
557 takes 2 parameters, the BEG and END of the region to be
558 fontified. Point is undefined on both entry and exit. On entry,
559 the buffer will have been widened and match-data will have been
560 saved; the return value is a cons of the adjusted
561 region, (NEW-BEG . NEW-END).")
564 ;;; Syntactic analysis ("virtual semicolons") for line-oriented languages (AWK).
565 (c-lang-defconst c-at-vsemi-p-fn
566 "Contains a function \"Is there a virtual semicolon at POS or point?\".
567 Such a function takes one optional parameter, a buffer position (defaults to
568 point), and returns nil or t. This variable contains nil for languages which
569 don't have EOL terminated statements. "
571 (c c++ objc) 'c-at-macro-vsemi-p
572 awk 'c-awk-at-vsemi-p)
573 (c-lang-defvar c-at-vsemi-p-fn (c-lang-const c-at-vsemi-p-fn))
575 (c-lang-defconst c-vsemi-status-unknown-p-fn
576 "Contains a function \"are we unsure whether there is a virtual semicolon on this line?\".
577 The (admittedly kludgy) purpose of such a function is to prevent an infinite
578 recursion in c-beginning-of-statement-1 when point starts at a `while' token.
579 The function MUST NOT UNDER ANY CIRCUMSTANCES call c-beginning-of-statement-1,
580 even indirectly. This variable contains nil for languages which don't have
581 EOL terminated statements."
583 (c c++ objc) 'c-macro-vsemi-status-unknown-p
584 awk 'c-awk-vsemi-status-unknown-p)
585 (c-lang-defvar c-vsemi-status-unknown-p-fn
586 (c-lang-const c-vsemi-status-unknown-p-fn))
589 ;;; Lexer-level syntax (identifiers, tokens etc).
591 (c-lang-defconst c-has-bitfields
592 "Whether the language has bitfield declarations."
595 (c-lang-defvar c-has-bitfields (c-lang-const c-has-bitfields))
597 (c-lang-defconst c-modified-constant
598 "Regexp that matches a “modified” constant literal such as \"L\\='a\\='\",
599 a “long character”. In particular, this recognizes forms of constant
600 which `c-backward-sexp' needs to be called twice to move backwards over."
602 (c c++ objc) "L'\\([^\\'\t\f\n\r]\\|\\\\.\\)'")
603 ;; FIXME!!! Extend this to cover strings, if needed. 2008-04-11
604 (c-lang-defvar c-modified-constant (c-lang-const c-modified-constant))
606 (c-lang-defconst c-symbol-start
607 "Regexp that matches the start of a symbol, i.e. any identifier or
608 keyword. It's unspecified how far it matches. Does not contain a \\|
609 operator at the top level."
610 t (concat "[" c-alpha "_]")
611 java (concat "[" c-alpha "_@]")
612 objc (concat "[" c-alpha "_@]")
613 pike (concat "[" c-alpha "_`]"))
614 (c-lang-defvar c-symbol-start (c-lang-const c-symbol-start))
616 (c-lang-defconst c-symbol-chars
617 "Set of characters that can be part of a symbol.
618 This is of the form that fits inside [ ] in a regexp."
619 ;; Pike note: With the backquote identifiers this would include most
620 ;; operator chars too, but they are handled with other means instead.
621 t (concat c-alnum "_$")
622 objc (concat c-alnum "_$@"))
623 (c-lang-defvar c-symbol-chars (c-lang-const c-symbol-chars))
625 (c-lang-defconst c-symbol-char-key
626 "Regexp matching a sequence of at least one identifier character."
627 t (concat "[" (c-lang-const c-symbol-chars) "]+"))
628 (c-lang-defvar c-symbol-char-key (c-lang-const c-symbol-char-key))
630 (c-lang-defconst c-symbol-key
631 "Regexp matching identifiers and keywords (with submatch 0). Assumed
632 to match if `c-symbol-start' matches on the same position."
633 t (concat (c-lang-const c-symbol-start)
634 "[" (c-lang-const c-symbol-chars) "]*")
636 ;; Use the value from C here since the operator backquote is
637 ;; covered by the other alternative.
638 (c-lang-const c-symbol-key c)
640 (c-make-keywords-re nil
641 (c-lang-const c-overloadable-operators))))
642 (c-lang-defvar c-symbol-key (c-lang-const c-symbol-key))
644 (c-lang-defconst c-symbol-key-depth
645 ;; Number of regexp grouping parens in `c-symbol-key'.
646 t (regexp-opt-depth (c-lang-const c-symbol-key)))
648 (c-lang-defconst c-nonsymbol-chars
649 "This is the set of chars that can't be part of a symbol, i.e. the
650 negation of `c-symbol-chars'."
651 t (concat "^" (c-lang-const c-symbol-chars)))
652 (c-lang-defvar c-nonsymbol-chars (c-lang-const c-nonsymbol-chars))
654 (c-lang-defconst c-nonsymbol-key
655 "Regexp that matches any character that can't be part of a symbol.
656 It's usually appended to other regexps to avoid matching a prefix.
657 It's assumed to not contain any submatchers."
658 ;; The same thing regarding Unicode identifiers applies here as to
660 t (concat "[" (c-lang-const c-nonsymbol-chars) "]"))
662 (c-lang-defconst c-identifier-ops
663 "The operators that make up fully qualified identifiers. nil in
664 languages that don't have such things. See `c-operators' for a
665 description of the format. Binary operators can concatenate symbols,
666 e.g. \"::\" in \"A::B::C\". Prefix operators can precede identifiers,
667 e.g. \"~\" in \"~A::B\". Other types of operators aren't supported.
669 This value is by default merged into `c-operators'."
671 c++ '((prefix "~" "??-" "compl")
674 ;; Java has "." to concatenate identifiers but it's also used for
675 ;; normal indexing. There's special code in the Java font lock
676 ;; rules to fontify qualified identifiers based on the standard
677 ;; naming conventions. We still define "." here to make
678 ;; `c-forward-name' move over as long names as possible which is
679 ;; necessary to e.g. handle throws clauses correctly.
680 java '((left-assoc "."))
681 idl '((left-assoc "::")
683 pike '((left-assoc "::")
687 (c-lang-defconst c-opt-identifier-concat-key
688 ;; Appendable adorned regexp matching the operators that join
689 ;; symbols to fully qualified identifiers, or nil in languages that
690 ;; don't have such things.
692 ;; This was a docstring constant in 5.30. It still works but is now
693 ;; considered internal - change `c-identifier-ops' instead.
694 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
695 '(left-assoc right-assoc)
698 (c-make-keywords-re 'appendable ops))))
699 (c-lang-defvar c-opt-identifier-concat-key
700 (c-lang-const c-opt-identifier-concat-key)
703 (c-lang-defconst c-opt-identifier-concat-key-depth
704 ;; Number of regexp grouping parens in `c-opt-identifier-concat-key'.
705 t (regexp-opt-depth (c-lang-const c-opt-identifier-concat-key)))
707 (c-lang-defconst c-opt-identifier-prefix-key
708 ;; Appendable adorned regexp matching operators that might precede
709 ;; an identifier and that are part of the identifier in that case.
710 ;; nil in languages without such things.
711 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
715 (c-make-keywords-re 'appendable ops))))
717 (c-lang-defconst c-after-id-concat-ops
718 "Operators that can occur after a binary operator on `c-identifier-ops'
719 in identifiers. nil in languages that don't have such things.
721 Operators here should also have appropriate entries in `c-operators' -
722 it's not taken care of by default."
724 ;; '~' for destructors in C++, '*' for member pointers.
726 ;; In Java we recognize '*' to deal with "foo.bar.*" that can occur
727 ;; in import declarations. (This will also match bogus things like
728 ;; "foo.*bar" but we don't bother.)
731 (c-lang-defconst c-opt-after-id-concat-key
732 ;; Regexp that must match the token after
733 ;; `c-opt-identifier-concat-key' for it to be considered an
734 ;; identifier concatenation operator (which e.g. causes the
735 ;; preceding identifier to be fontified as a reference). Assumed to
736 ;; be a string if `c-opt-identifier-concat-key' is.
738 ;; This was a docstring constant in 5.30. It still works but is now
739 ;; considered internal - change `c-after-id-concat-ops' instead.
740 t (concat (c-lang-const c-symbol-start)
741 (if (c-lang-const c-after-id-concat-ops)
742 (concat "\\|" (c-make-keywords-re 'appendable
743 (c-lang-const c-after-id-concat-ops)))
746 (c-lang-defconst c-identifier-start
747 "Regexp that matches the start of an (optionally qualified) identifier.
748 It should also match all keywords. It's unspecified how far it
750 t (concat (c-lang-const c-symbol-start)
751 (if (c-lang-const c-opt-identifier-prefix-key)
753 (c-lang-const c-opt-identifier-prefix-key))
755 (c-lang-defvar c-identifier-start (c-lang-const c-identifier-start))
757 (c-lang-defconst c-identifier-key
758 "Regexp matching a fully qualified identifier, like \"A::B::c\" in
759 C++. It does not recognize the full range of syntactic whitespace
760 between the tokens; `c-forward-name' has to be used for that. It
761 should also not match identifiers containing parenthesis groupings,
762 e.g. identifiers with template arguments such as \"A<X,Y>\" in C++."
763 ;; This regexp is more complex than strictly necessary to ensure
764 ;; that it can be matched with a minimum of backtracking.
765 t (concat (if (c-lang-const c-opt-identifier-prefix-key)
768 (c-lang-const c-opt-identifier-prefix-key)
769 (c-lang-const c-simple-ws) "*"
772 "\\(" (c-lang-const c-symbol-key) "\\)"
773 (if (c-lang-const c-opt-identifier-concat-key)
776 (c-lang-const c-simple-ws) "*"
777 (c-lang-const c-opt-identifier-concat-key)
778 (c-lang-const c-simple-ws) "*"
779 (if (c-lang-const c-after-id-concat-ops)
782 (c-make-keywords-re 'appendable
783 (c-lang-const c-after-id-concat-ops))
785 ;; For flexibility, consider the symbol match
786 ;; optional if we've hit a
787 ;; `c-after-id-concat-ops' operator. This is
788 ;; also necessary to handle the "*" that can
789 ;; end import declaration identifiers in Java.
791 (c-lang-const c-simple-ws) "*"
792 "\\(" (c-lang-const c-symbol-key) "\\)"
795 "\\(" (c-lang-const c-symbol-key) "\\)"
797 (concat "\\(" (c-lang-const c-symbol-key) "\\)"))
800 (c-lang-defvar c-identifier-key (c-lang-const c-identifier-key))
802 (c-lang-defconst c-identifier-last-sym-match
803 ;; This was a docstring constant in 5.30 but it's no longer used.
804 ;; It's only kept to avoid breaking third party code.
806 ;; Used to identify the submatch in `c-identifier-key' that
807 ;; surrounds the last symbol in the qualified identifier. It's a
808 ;; list of submatch numbers, of which the first that has a match is
809 ;; taken. It's assumed that at least one does when the regexp has
813 (c-lang-defconst c-string-escaped-newlines
814 "Set if the language support backslash escaped newlines inside string
818 (c-lang-defvar c-string-escaped-newlines
819 (c-lang-const c-string-escaped-newlines))
821 (c-lang-defconst c-multiline-string-start-char
822 "Set if the language supports multiline string literals without escaped
823 newlines. If t, all string literals are multiline. If a character,
824 only literals where the open quote is immediately preceded by that
825 literal are multiline."
828 (c-lang-defvar c-multiline-string-start-char
829 (c-lang-const c-multiline-string-start-char))
831 (c-lang-defconst c-opt-cpp-symbol
832 "The symbol which starts preprocessor constructs when in the margin."
835 (c-lang-defvar c-opt-cpp-symbol (c-lang-const c-opt-cpp-symbol))
837 (c-lang-defconst c-opt-cpp-prefix
838 "Regexp matching the prefix of a cpp directive in the languages that
839 normally use that macro preprocessor. Tested at bol or at boi.
840 Assumed to not contain any submatches or \\| operators."
841 ;; TODO (ACM, 2005-04-01). Amend the following to recognize escaped NLs;
842 ;; amend all uses of c-opt-cpp-prefix which count regexp-depth.
845 (c-lang-defvar c-opt-cpp-prefix (c-lang-const c-opt-cpp-prefix))
847 (c-lang-defconst c-anchored-cpp-prefix
848 "Regexp matching the prefix of a cpp directive anchored to BOL,
849 in the languages that have a macro preprocessor."
850 t "^\\s *\\(#\\)\\s *"
852 (c-lang-defvar c-anchored-cpp-prefix (c-lang-const c-anchored-cpp-prefix))
854 (c-lang-defconst c-opt-cpp-start
855 "Regexp matching the prefix of a cpp directive including the directive
856 name, or nil in languages without preprocessor support. The first
857 submatch surrounds the directive name."
858 t (if (c-lang-const c-opt-cpp-prefix)
859 (concat (c-lang-const c-opt-cpp-prefix)
860 "\\([" c-alnum "]+\\)"))
861 ;; Pike, being a scripting language, recognizes hash-bangs too.
862 pike (concat (c-lang-const c-opt-cpp-prefix)
863 "\\([" c-alnum "]+\\|!\\)"))
864 (c-lang-defvar c-opt-cpp-start (c-lang-const c-opt-cpp-start))
866 (c-lang-defconst c-cpp-message-directives
867 "List of cpp directives (without the prefix) that are followed by a
869 t (if (c-lang-const c-opt-cpp-prefix)
871 (c c++ objc pike) '("error" "warning"))
873 (c-lang-defconst c-cpp-include-directives
874 "List of cpp directives (without the prefix) that are followed by a
875 file name in angle brackets or quotes."
876 t (if (c-lang-const c-opt-cpp-prefix)
878 objc '("include" "import"))
880 (c-lang-defconst c-opt-cpp-macro-define
881 "Cpp directive (without the prefix) that is followed by a macro
882 definition, or nil if the language doesn't have any."
883 t (if (c-lang-const c-opt-cpp-prefix)
885 (c-lang-defvar c-opt-cpp-macro-define
886 (c-lang-const c-opt-cpp-macro-define))
888 (c-lang-defconst c-opt-cpp-macro-define-start
889 ;; Regexp matching everything up to the macro body of a cpp define, or the
890 ;; end of the logical line if there is none. Submatch 1 is the name of the
891 ;; macro. Set if c-opt-cpp-macro-define is.
892 t (if (c-lang-const c-opt-cpp-macro-define)
893 (concat (c-lang-const c-opt-cpp-prefix)
894 (c-lang-const c-opt-cpp-macro-define)
895 "[ \t]+\\(\\(\\sw\\|_\\)+\\)\\(([^)]*)\\)?"
897 "\\([ \t]\\|\\\\\n\\)*")))
898 (c-lang-defvar c-opt-cpp-macro-define-start
899 (c-lang-const c-opt-cpp-macro-define-start))
901 (c-lang-defconst c-opt-cpp-macro-define-id
902 ;; Regexp matching everything up to the end of the identifier defined
904 t (if (c-lang-const c-opt-cpp-macro-define)
905 (concat (c-lang-const c-opt-cpp-prefix) ; #
906 (c-lang-const c-opt-cpp-macro-define) ; define
907 "[ \t]+\\(\\sw\\|_\\)+")))
908 (c-lang-defvar c-opt-cpp-macro-define-id
909 (c-lang-const c-opt-cpp-macro-define-id))
911 (c-lang-defconst c-cpp-expr-directives
912 "List of cpp directives (without the prefix) that are followed by an
914 t (if (c-lang-const c-opt-cpp-prefix)
917 (c-lang-defconst c-cpp-expr-intro-re
918 "Regexp which matches the start of a CPP directive which contains an
919 expression, or nil if there aren't any in the language."
920 t (if (c-lang-const c-cpp-expr-directives)
922 (c-lang-const c-opt-cpp-prefix)
923 (c-make-keywords-re t (c-lang-const c-cpp-expr-directives)))))
924 (c-lang-defvar c-cpp-expr-intro-re
925 (c-lang-const c-cpp-expr-intro-re))
927 (c-lang-defconst c-cpp-expr-functions
928 "List of functions in cpp expressions."
929 t (if (c-lang-const c-opt-cpp-prefix)
931 pike '("defined" "efun" "constant"))
933 (c-lang-defconst c-assignment-operators
934 "List of all assignment operators."
935 t '("=" "*=" "/=" "%=" "+=" "-=" ">>=" "<<=" "&=" "^=" "|=")
936 java (append (c-lang-const c-assignment-operators)
938 c++ (append (c-lang-const c-assignment-operators)
939 '("and_eq" "or_eq" "xor_eq" "??!=" "??'="))
942 (c-lang-defconst c-operators
943 "List describing all operators, along with their precedence and
944 associativity. The order in the list corresponds to the precedence of
945 the operators: The operators in each element are a group with the same
946 precedence, and the group has higher precedence than the groups in all
947 following elements. The car of each element describes the type of the
948 operator group, and the cdr is a list of the operator tokens in it.
949 The operator group types are:
951 `prefix' Unary prefix operators.
952 `postfix' Unary postfix operators.
954 Unary postfix operators if and only if the chars have
956 `left-assoc' Binary left associative operators (i.e. a+b+c means (a+b)+c).
957 `right-assoc' Binary right associative operators (i.e. a=b=c means a=(b=c)).
958 `right-assoc-sequence'
959 Right associative operator that constitutes of a
960 sequence of tokens that separate expressions. All the
961 tokens in the group are in this case taken as
962 describing the sequence in one such operator, and the
963 order between them is therefore significant.
965 Operators containing a character with paren syntax are taken to match
966 with a corresponding open/close paren somewhere else. A postfix
967 operator with close paren syntax is taken to end a postfix expression
968 started somewhere earlier, rather than start a new one at point. Vice
969 versa for prefix operators with open paren syntax.
971 Note that operators like \".\" and \"->\" which in language references
972 often are described as postfix operators are considered binary here,
973 since CC Mode treats every identifier as an expression."
975 ;; There's currently no code in CC Mode that exploits all the info
976 ;; in this variable; precedence, associativity etc are present as a
977 ;; preparation for future work.
979 ;; FIXME!!! C++11's "auto" operators "=" and "->" need to go in here
980 ;; somewhere. 2012-03-24.
983 ,@(when (c-lang-const c-opt-cpp-prefix)
985 ,@(when (c-major-mode-is '(c-mode c++-mode))
988 ,@(when (c-major-mode-is '(c-mode c++-mode))
989 '("%:%:" "??=??=")))))
992 ,@(c-lang-const c-identifier-ops)
993 ,@(cond ((or (c-major-mode-is 'c++-mode) (c-major-mode-is 'java-mode))
994 `((postfix-if-paren "<" ">"))) ; Templates.
995 ((c-major-mode-is 'pike-mode)
996 `((prefix "global" "predef")))
997 ((c-major-mode-is 'java-mode)
998 `((prefix "super"))))
1001 ,@(when (c-major-mode-is 'c++-mode)
1002 ;; The following need special treatment.
1003 `((prefix "dynamic_cast" "static_cast"
1004 "reinterpret_cast" "const_cast" "typeid"
1007 ,@(unless (c-major-mode-is 'java-mode)
1009 (postfix "++" "--" "[" "]" "(" ")"
1010 ,@(when (c-major-mode-is '(c-mode c++-mode))
1011 '("<:" ":>" "??(" "??)")))
1014 (prefix "++" "--" "+" "-" "!" "~"
1015 ,@(when (c-major-mode-is 'c++-mode) '("not" "compl"))
1016 ,@(when (c-major-mode-is '(c-mode c++-mode))
1017 '("*" "&" "sizeof" "??-"))
1018 ,@(when (c-major-mode-is 'objc-mode)
1019 '("@selector" "@protocol" "@encode"))
1020 ;; The following need special treatment.
1021 ,@(cond ((c-major-mode-is 'c++-mode)
1023 ((c-major-mode-is 'java-mode)
1025 ((c-major-mode-is 'pike-mode)
1026 '("class" "lambda" "catch" "throw" "gauge")))
1028 ,@(when (c-major-mode-is 'pike-mode)
1029 '("[" "]"))) ; Type cast.
1031 ;; Member selection.
1032 ,@(when (c-major-mode-is 'c++-mode)
1033 `((left-assoc ".*" "->*")))
1036 (left-assoc "*" "/" "%")
1039 (left-assoc "+" "-")
1042 (left-assoc "<<" ">>"
1043 ,@(when (c-major-mode-is 'java-mode)
1047 (left-assoc "<" ">" "<=" ">="
1048 ,@(when (c-major-mode-is 'java-mode)
1052 (left-assoc "==" "!="
1053 ,@(when (c-major-mode-is 'c++-mode) '("not_eq")))
1057 ,@(when (c-major-mode-is 'c++-mode) '("bitand")))
1059 ;; Bitwise exclusive or.
1061 ,@(when (c-major-mode-is '(c-mode c++-mode))
1063 ,@(when (c-major-mode-is 'c++-mode) '("xor")))
1067 ,@(when (c-major-mode-is '(c-mode c++-mode))
1069 ,@(when (c-major-mode-is 'c++-mode) '("bitor")))
1073 ,@(when (c-major-mode-is 'c++-mode) '("and")))
1077 ,@(when (c-major-mode-is '(c-mode c++-mode))
1079 ,@(when (c-major-mode-is 'c++-mode) '("or")))
1082 (right-assoc-sequence "?" ":")
1085 (right-assoc ,@(c-lang-const c-assignment-operators))
1088 ,@(when (c-major-mode-is 'c++-mode)
1089 '((prefix "throw")))
1094 ;; IDL got its own definition since it has a much smaller operator
1095 ;; set than the other languages.
1096 idl `(;; Preprocessor.
1100 ,@(c-lang-const c-identifier-ops)
1102 (prefix "+" "-" "~")
1104 (left-assoc "*" "/" "%")
1106 (left-assoc "+" "-")
1108 (left-assoc "<<" ">>")
1116 (c-lang-defconst c-operator-list
1117 ;; The operators as a flat list (without duplicates).
1118 t (c-filter-ops (c-lang-const c-operators) t t))
1120 (c-lang-defconst c-overloadable-operators
1121 "List of the operators that are overloadable, in their \"identifier
1122 form\". See also `c-op-identifier-prefix'."
1124 c++ '("new" "delete" ;; Can be followed by "[]" but we ignore that.
1126 "^" "??'" "xor" "&" "bitand" "|" "??!" "bitor" "~" "??-" "compl"
1127 "!" "=" "<" ">" "+=" "-=" "*=" "/=" "%=" "^="
1128 "??'=" "xor_eq" "&=" "and_eq" "|=" "??!=" "or_eq"
1129 "<<" ">>" ">>=" "<<=" "==" "!=" "not_eq" "<=" ">="
1130 "&&" "and" "||" "??!??!" "or" "++" "--" "," "->*" "->"
1131 "()" "[]" "<::>" "??(??)")
1132 ;; These work like identifiers in Pike.
1133 pike '("`+" "`-" "`&" "`|" "`^" "`<<" "`>>" "`*" "`/" "`%" "`~"
1134 "`==" "`<" "`>" "`!" "`[]" "`[]=" "`->" "`->=" "`()" "``+"
1135 "``-" "``&" "``|" "``^" "``<<" "``>>" "``*" "``/" "``%"
1138 (c-lang-defconst c-overloadable-operators-regexp
1139 ;; Regexp tested after an "operator" token in C++.
1141 c++ (c-make-keywords-re nil (c-lang-const c-overloadable-operators)))
1142 (c-lang-defvar c-overloadable-operators-regexp
1143 (c-lang-const c-overloadable-operators-regexp))
1145 (c-lang-defconst c-opt-op-identifier-prefix
1146 "Regexp matching the token before the ones in
1147 `c-overloadable-operators' when operators are specified in their
1148 \"identifier form\". This typically matches \"operator\" in C++ where
1149 operator functions are specified as e.g. \"operator +\". It's nil in
1150 languages without operator functions or where the complete operator
1151 identifier is listed in `c-overloadable-operators'.
1153 This regexp is assumed to not match any non-operator identifier."
1155 c++ (c-make-keywords-re t '("operator")))
1156 (c-lang-defvar c-opt-op-identifier-prefix
1157 (c-lang-const c-opt-op-identifier-prefix))
1159 ;; Note: the following alias is an old name which was a mis-spelling. It has
1160 ;; been corrected above and throughout cc-engine.el. It will be removed at
1161 ;; some release very shortly in the future. ACM, 2006-04-14.
1162 (defvaralias 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix)
1163 (make-obsolete-variable 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix
1164 "CC Mode 5.31.4, 2006-04-14")
1166 (c-lang-defconst c-other-op-syntax-tokens
1167 "List of the tokens made up of characters in the punctuation or
1168 parenthesis syntax classes that have uses other than as expression
1170 t '("{" "}" "(" ")" "[" "]" ";" ":" "," "=" "/*" "*/" "//")
1171 (c c++ pike) (append '("#" "##" ; Used by cpp.
1173 (c-lang-const c-other-op-syntax-tokens))
1174 (c c++) (append '("*") (c-lang-const c-other-op-syntax-tokens))
1175 c++ (append '("&" "<%" "%>" "<:" ":>" "%:" "%:%:")
1176 (c-lang-const c-other-op-syntax-tokens))
1177 objc (append '("#" "##" ; Used by cpp.
1179 (c-lang-const c-other-op-syntax-tokens))
1180 idl (append '("#" "##") ; Used by cpp.
1181 (c-lang-const c-other-op-syntax-tokens))
1182 pike (append '("..")
1183 (c-lang-const c-other-op-syntax-tokens)
1184 (c-lang-const c-overloadable-operators))
1185 awk '("{" "}" "(" ")" "[" "]" ";" "," "=" "/"))
1187 (c-lang-defconst c-all-op-syntax-tokens
1188 ;; List of all tokens in the punctuation and parenthesis syntax
1190 t (c--delete-duplicates (append (c-lang-const c-other-op-syntax-tokens)
1191 (c-lang-const c-operator-list))
1192 :test 'string-equal))
1194 (c-lang-defconst c-nonsymbol-token-char-list
1195 ;; List containing all chars not in the word, symbol or
1196 ;; syntactically irrelevant syntax classes, i.e. all punctuation,
1197 ;; parenthesis and string delimiter chars.
1198 t (c-with-syntax-table (c-lang-const c-mode-syntax-table)
1199 ;; Only go through the chars in the printable ASCII range. No
1200 ;; language so far has 8-bit or widestring operators.
1201 (let (list (char 32))
1203 (or (memq (char-syntax char) '(?w ?_ ?< ?> ?\ ))
1204 (setq list (cons (c-int-to-char char) list)))
1205 (setq char (1+ char)))
1208 (c-lang-defconst c-nonsymbol-token-regexp
1209 ;; Regexp matching all tokens in the punctuation and parenthesis
1210 ;; syntax classes. Note that this also matches ".", which can start
1212 t (c-make-keywords-re nil
1213 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1215 "\\`\\(\\s.\\)+\\'")))
1216 (c-lang-defvar c-nonsymbol-token-regexp
1217 (c-lang-const c-nonsymbol-token-regexp))
1219 (c-lang-defconst c-assignment-op-regexp
1220 ;; Regexp matching all assignment operators and only them. The
1221 ;; beginning of the first submatch is used to detect the end of the
1222 ;; token, along with the end of the whole match.
1223 t (if (c-lang-const c-assignment-operators)
1225 ;; Need special case for "=" since it's a prefix of "==".
1228 (c-make-keywords-re nil
1229 (c--set-difference (c-lang-const c-assignment-operators)
1231 :test 'string-equal)))
1233 (c-lang-defvar c-assignment-op-regexp
1234 (c-lang-const c-assignment-op-regexp))
1236 (c-lang-defconst c-:$-multichar-token-regexp
1237 ;; Regexp matching all tokens ending in ":" which are longer than one char.
1238 ;; Currently (2016-01-07) only used in C++ Mode.
1239 t (c-make-keywords-re nil
1240 (c-filter-ops (c-lang-const c-operators) t ".+:$")))
1241 (c-lang-defvar c-:$-multichar-token-regexp
1242 (c-lang-const c-:$-multichar-token-regexp))
1244 (c-lang-defconst c-<>-multichar-token-regexp
1245 ;; Regexp matching all tokens containing "<" or ">" which are longer
1247 t (c-make-keywords-re nil
1248 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1251 (c-lang-defvar c-<>-multichar-token-regexp
1252 (c-lang-const c-<>-multichar-token-regexp))
1254 (c-lang-defconst c-<-op-cont-regexp
1255 ;; Regexp matching the second and subsequent characters of all
1256 ;; multicharacter tokens that begin with "<".
1257 t (c-make-keywords-re nil
1258 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1261 (lambda (op) (substring op 1)))))
1262 (c-lang-defvar c-<-op-cont-regexp (c-lang-const c-<-op-cont-regexp))
1264 (c-lang-defconst c->-op-cont-tokens
1265 ;; A list of second and subsequent characters of all multicharacter tokens
1266 ;; that begin with ">".
1267 t (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1270 (lambda (op) (substring op 1)))
1271 java (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1273 "\\`>[^>]\\|\\`>>[^>]"
1274 (lambda (op) (substring op 1))))
1276 (c-lang-defconst c->-op-cont-regexp
1277 ;; Regexp matching the second and subsequent characters of all
1278 ;; multicharacter tokens that begin with ">".
1279 t (c-make-keywords-re nil (c-lang-const c->-op-cont-tokens)))
1280 (c-lang-defvar c->-op-cont-regexp (c-lang-const c->-op-cont-regexp))
1282 (c-lang-defconst c->-op-without->-cont-regexp
1283 ;; Regexp matching the second and subsequent characters of all
1284 ;; multicharacter tokens that begin with ">" except for those beginning with
1286 t (c-make-keywords-re nil
1288 (c-lang-const c->-op-cont-tokens)
1289 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1292 (lambda (op) (substring op 1)))
1293 :test 'string-equal)))
1294 (c-lang-defvar c->-op-without->-cont-regexp
1295 (c-lang-const c->-op-without->-cont-regexp))
1297 (c-lang-defconst c-multichar->-op-not->>-regexp
1298 ;; Regexp matching multichar tokens containing ">", except ">>"
1299 t (c-make-keywords-re nil
1301 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1304 (c-lang-defvar c-multichar->-op-not->>-regexp
1305 (c-lang-const c-multichar->-op-not->>-regexp))
1307 (c-lang-defconst c-stmt-delim-chars
1308 ;; The characters that should be considered to bound statements. To
1309 ;; optimize `c-crosses-statement-barrier-p' somewhat, it's assumed to
1310 ;; begin with "^" to negate the set. If ? : operators should be
1311 ;; detected then the string must end with "?:".
1313 (c-lang-defvar c-stmt-delim-chars (c-lang-const c-stmt-delim-chars))
1315 (c-lang-defconst c-stmt-delim-chars-with-comma
1316 ;; Variant of `c-stmt-delim-chars' that additionally contains ','.
1318 (c-lang-defvar c-stmt-delim-chars-with-comma
1319 (c-lang-const c-stmt-delim-chars-with-comma))
1321 (c-lang-defconst c-auto-ops
1322 ;; Ops which signal C++11's new auto uses.
1325 (c-lang-defconst c-auto-ops-re
1326 t (c-make-keywords-re nil (c-lang-const c-auto-ops)))
1327 (c-lang-defvar c-auto-ops-re (c-lang-const c-auto-ops-re))
1329 (c-lang-defconst c-haskell-op
1330 ;; Op used in the new C++11 auto function definition, indicating type.
1333 (c-lang-defconst c-haskell-op-re
1334 t (c-make-keywords-re nil (c-lang-const c-haskell-op)))
1335 (c-lang-defvar c-haskell-op-re (c-lang-const c-haskell-op-re))
1337 (c-lang-defconst c-pre-start-tokens
1338 "List of operators following which an apparent declaration \(e.g.
1339 \"t1 *fn (t2 *b);\") is most likely to be an actual declaration
1340 \(as opposed to an arithmetic expression)."
1342 (c-lang-defvar c-pre-start-tokens (c-lang-const c-pre-start-tokens))
1345 ;;; Syntactic whitespace.
1347 (c-lang-defconst c-simple-ws
1348 "Regexp matching an ordinary whitespace character.
1349 Does not contain a \\| operator at the top level."
1350 ;; "\\s " is not enough since it doesn't match line breaks.
1351 t "\\(\\s \\|[\n\r]\\)")
1353 (c-lang-defconst c-simple-ws-depth
1354 ;; Number of regexp grouping parens in `c-simple-ws'.
1355 t (regexp-opt-depth (c-lang-const c-simple-ws)))
1357 (c-lang-defconst c-line-comment-starter
1358 "String that starts line comments, or nil if such don't exist.
1359 Line comments are always terminated by newlines. At least one of
1360 `c-block-comment-starter' and this one is assumed to be set.
1362 Note that it's currently not enough to set this to support a new
1363 comment style. Other stuff like the syntax table must also be set up
1367 (c-lang-defvar c-line-comment-starter (c-lang-const c-line-comment-starter))
1369 (c-lang-defconst c-block-comment-starter
1370 "String that starts block comments, or nil if such don't exist.
1371 Block comments are ended by `c-block-comment-ender', which is assumed
1372 to be set if this is. At least one of `c-line-comment-starter' and
1373 this one is assumed to be set.
1375 Note that it's currently not enough to set this to support a new
1376 comment style. Other stuff like the syntax table must also be set up
1381 (c-lang-defconst c-block-comment-ender
1382 "String that ends block comments, or nil if such don't exist.
1384 Note that it's currently not enough to set this to support a new
1385 comment style. Other stuff like the syntax table must also be set up
1390 (c-lang-defconst c-comment-start-regexp
1391 ;; Regexp to match the start of any type of comment.
1392 t (let ((re (c-make-keywords-re nil
1393 (list (c-lang-const c-line-comment-starter)
1394 (c-lang-const c-block-comment-starter)))))
1395 (if (memq 'gen-comment-delim c-emacs-features)
1396 (concat re "\\|\\s!")
1398 (c-lang-defvar c-comment-start-regexp (c-lang-const c-comment-start-regexp))
1400 (c-lang-defconst c-block-comment-start-regexp
1401 ;; Regexp which matches the start of a block comment (if such exists in the
1403 t (if (c-lang-const c-block-comment-starter)
1404 (regexp-quote (c-lang-const c-block-comment-starter))
1406 (c-lang-defvar c-block-comment-start-regexp
1407 (c-lang-const c-block-comment-start-regexp))
1409 (c-lang-defconst c-line-comment-start-regexp
1410 ;; Regexp which matches the start of a line comment (if such exists in the
1411 ;; language; it does in all 7 CC Mode languages).
1412 t (if (c-lang-const c-line-comment-starter)
1413 (regexp-quote (c-lang-const c-line-comment-starter))
1415 (c-lang-defvar c-line-comment-start-regexp
1416 (c-lang-const c-line-comment-start-regexp))
1418 (c-lang-defconst c-literal-start-regexp
1419 ;; Regexp to match the start of comments and string literals.
1420 t (concat (c-lang-const c-comment-start-regexp)
1422 (if (memq 'gen-string-delim c-emacs-features)
1425 (c-lang-defvar c-literal-start-regexp (c-lang-const c-literal-start-regexp))
1427 (c-lang-defconst c-doc-comment-start-regexp
1428 "Regexp to match the start of documentation comments."
1430 ;; From font-lock.el: `doxygen' uses /*! while others use /**.
1431 (c c++ objc) "/\\*[*!]"
1434 (c-lang-defvar c-doc-comment-start-regexp
1435 (c-lang-const c-doc-comment-start-regexp))
1437 (c-lang-defconst comment-start
1438 "String that starts comments inserted with M-; etc.
1439 `comment-start' is initialized from this."
1440 ;; Default: Prefer line comments to block comments, and pad with a space.
1441 t (concat (or (c-lang-const c-line-comment-starter)
1442 (c-lang-const c-block-comment-starter))
1444 ;; In C we still default to the block comment style since line
1445 ;; comments aren't entirely portable.
1447 (c-lang-setvar comment-start (c-lang-const comment-start))
1449 (c-lang-defconst comment-end
1450 "String that ends comments inserted with M-; etc.
1451 `comment-end' is initialized from this."
1452 ;; Default: Use block comment style if comment-start uses block
1453 ;; comments, and pad with a space in that case.
1454 t (if (string-match (concat "\\`\\("
1455 (c-lang-const c-block-comment-start-regexp)
1457 (c-lang-const comment-start))
1458 (concat " " (c-lang-const c-block-comment-ender))
1460 (c-lang-setvar comment-end (c-lang-const comment-end))
1462 (c-lang-defconst comment-start-skip
1463 "Regexp to match the start of a comment plus everything up to its body.
1464 `comment-start-skip' is initialized from this."
1465 ;; Default: Allow the last char of the comment starter(s) to be
1466 ;; repeated, then allow any amount of horizontal whitespace.
1469 (mapcar (lambda (cs)
1471 (concat (regexp-quote cs) "+")))
1472 (list (c-lang-const c-line-comment-starter)
1473 (c-lang-const c-block-comment-starter)))
1476 (c-lang-setvar comment-start-skip (c-lang-const comment-start-skip))
1478 (c-lang-defconst comment-end-can-be-escaped
1479 "When non-nil, escaped EOLs inside comments are valid.
1480 This works in Emacs >= 25.1."
1483 (c-lang-setvar comment-end-can-be-escaped
1484 (c-lang-const comment-end-can-be-escaped))
1486 (c-lang-defconst c-syntactic-ws-start
1487 ;; Regexp matching any sequence that can start syntactic whitespace.
1488 ;; The only uncertain case is '#' when there are cpp directives.
1490 (c-make-keywords-re nil
1491 (append (list (c-lang-const c-line-comment-starter)
1492 (c-lang-const c-block-comment-starter)
1493 (when (c-lang-const c-opt-cpp-prefix)
1497 (when (memq 'gen-comment-delim c-emacs-features)
1499 (c-lang-defvar c-syntactic-ws-start (c-lang-const c-syntactic-ws-start))
1501 (c-lang-defconst c-syntactic-ws-end
1502 ;; Regexp matching any single character that might end syntactic whitespace.
1504 (c-make-keywords-re nil
1505 (append (when (c-lang-const c-block-comment-ender)
1508 (elt (c-lang-const c-block-comment-ender)
1510 (c-lang-const c-block-comment-ender)))))))
1512 (when (memq 'gen-comment-delim c-emacs-features)
1514 (c-lang-defvar c-syntactic-ws-end (c-lang-const c-syntactic-ws-end))
1516 (c-lang-defconst c-unterminated-block-comment-regexp
1517 ;; Regexp matching an unterminated block comment that doesn't
1518 ;; contain line breaks, or nil in languages without block comments.
1519 ;; Does not contain a \| operator at the top level.
1520 t (when (c-lang-const c-block-comment-starter)
1522 (regexp-quote (c-lang-const c-block-comment-starter))
1523 ;; It's messy to cook together a regexp that matches anything
1524 ;; but c-block-comment-ender.
1525 (let ((end (c-lang-const c-block-comment-ender)))
1526 (cond ((= (length end) 1)
1527 (concat "[^" end "\n\r]*"))
1529 (concat "[^" (substring end 0 1) "\n\r]*"
1531 (regexp-quote (substring end 0 1)) "+"
1533 ;; The quoting rules inside char classes are silly. :P
1534 (cond ((= (elt end 0) (elt end 1))
1535 (concat (substring end 0 1) "\n\r"))
1536 ((= (elt end 1) ?\])
1537 (concat (substring end 1 2) "\n\r"
1538 (substring end 0 1)))
1540 (concat (substring end 0 1) "\n\r"
1541 (substring end 1 2))))
1543 "[^" (substring end 0 1) "\n\r]*"
1546 (error "Can't handle a block comment ender of length %s"
1549 (c-lang-defconst c-block-comment-regexp
1550 ;; Regexp matching a block comment that doesn't contain line breaks,
1551 ;; or nil in languages without block comments. The reason we don't
1552 ;; allow line breaks is to avoid going very far and risk running out
1553 ;; of regexp stack; this regexp is intended to handle only short
1554 ;; comments that might be put in the middle of limited constructs
1555 ;; like declarations. Does not contain a \| operator at the top
1557 t (when (c-lang-const c-unterminated-block-comment-regexp)
1559 (c-lang-const c-unterminated-block-comment-regexp)
1560 (let ((end (c-lang-const c-block-comment-ender)))
1561 (cond ((= (length end) 1)
1564 (concat (regexp-quote (substring end 0 1)) "+"
1565 (regexp-quote (substring end 1 2))))
1567 (error "Can't handle a block comment ender of length %s"
1570 (c-lang-defconst c-nonwhite-syntactic-ws
1571 ;; Regexp matching a piece of syntactic whitespace that isn't a
1572 ;; sequence of simple whitespace characters. As opposed to
1573 ;; `c-(forward|backward)-syntactic-ws', this doesn't regard cpp
1574 ;; directives as syntactic whitespace.
1575 t (c-concat-separated
1576 (list (when (c-lang-const c-line-comment-starter)
1577 (concat (regexp-quote (c-lang-const c-line-comment-starter))
1579 (c-lang-const c-block-comment-regexp)
1581 (when (memq 'gen-comment-delim c-emacs-features)
1585 (c-lang-defconst c-syntactic-ws
1586 ;; Regexp matching syntactic whitespace, including possibly the
1587 ;; empty string. As opposed to `c-(forward|backward)-syntactic-ws',
1588 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1589 ;; not contain a \| operator at the top level.
1590 t (concat (c-lang-const c-simple-ws) "*"
1592 (concat "\\(" (c-lang-const c-nonwhite-syntactic-ws) "\\)"
1593 (c-lang-const c-simple-ws) "*")
1596 (c-lang-defconst c-syntactic-ws-depth
1597 ;; Number of regexp grouping parens in `c-syntactic-ws'.
1598 t (regexp-opt-depth (c-lang-const c-syntactic-ws)))
1600 (c-lang-defconst c-nonempty-syntactic-ws
1601 ;; Regexp matching syntactic whitespace, which is at least one
1602 ;; character long. As opposed to `c-(forward|backward)-syntactic-ws',
1603 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1604 ;; not contain a \| operator at the top level.
1606 (c-lang-const c-simple-ws)
1608 (c-lang-const c-nonwhite-syntactic-ws)
1611 (c-lang-defconst c-nonempty-syntactic-ws-depth
1612 ;; Number of regexp grouping parens in `c-nonempty-syntactic-ws'.
1613 t (regexp-opt-depth (c-lang-const c-nonempty-syntactic-ws)))
1615 (c-lang-defconst c-single-line-syntactic-ws
1616 ;; Regexp matching syntactic whitespace without any line breaks. As
1617 ;; opposed to `c-(forward|backward)-syntactic-ws', this doesn't
1618 ;; regard cpp directives as syntactic whitespace. Does not contain
1619 ;; a \| operator at the top level.
1620 t (if (c-lang-const c-block-comment-regexp)
1622 (c-lang-const c-block-comment-regexp)
1626 (c-lang-defconst c-single-line-syntactic-ws-depth
1627 ;; Number of regexp grouping parens in `c-single-line-syntactic-ws'.
1628 t (regexp-opt-depth (c-lang-const c-single-line-syntactic-ws)))
1630 (c-lang-defconst c-syntactic-eol
1631 ;; Regexp that matches when there is no syntactically significant
1632 ;; text before eol. Macros are regarded as syntactically
1633 ;; significant text here.
1634 t (concat (c-lang-const c-single-line-syntactic-ws)
1635 ;; Match eol (possibly inside a block comment or preceded
1636 ;; by a line continuation backslash), or the beginning of a
1637 ;; line comment. Note: This has to be modified for awk
1638 ;; where line comments start with '#'.
1641 (list (when (c-lang-const c-line-comment-starter)
1642 (regexp-quote (c-lang-const c-line-comment-starter)))
1643 (when (c-lang-const c-unterminated-block-comment-regexp)
1644 (concat (c-lang-const c-unterminated-block-comment-regexp)
1650 (c-lang-defvar c-syntactic-eol (c-lang-const c-syntactic-eol))
1655 ;; The Emacs variables beginning-of-defun-function and end-of-defun-function
1656 ;; will be set so that commands like `mark-defun' and `narrow-to-defun' work
1657 ;; right. In older Emacsen, the key sequences C-M-a and C-M-e are, however,
1658 ;; bound directly to the CC Mode functions, allowing optimization for large n.
1659 ;; From Emacs 23, this isn't necessary any more, since n is passed to the two
1661 (c-lang-defconst beginning-of-defun-function
1662 "Function to which beginning-of-defun-function will be set."
1663 t 'c-beginning-of-defun
1664 awk 'c-awk-beginning-of-defun)
1665 (c-lang-setvar beginning-of-defun-function
1666 (c-lang-const beginning-of-defun-function))
1668 (c-lang-defconst end-of-defun-function
1669 "Function to which end-of-defun-function will be set."
1671 awk 'c-awk-end-of-defun)
1672 (c-lang-setvar end-of-defun-function (c-lang-const end-of-defun-function))
1674 ;;; In-comment text handling.
1676 (c-lang-defconst c-paragraph-start
1677 "Regexp to append to `paragraph-start'."
1679 java "\\(@[a-zA-Z]+\\>\\|$\\)" ; For Javadoc.
1680 pike "\\(@[a-zA-Z_-]+\\>\\([^{]\\|$\\)\\|$\\)") ; For Pike refdoc.
1681 (c-lang-defvar c-paragraph-start (c-lang-const c-paragraph-start))
1683 (c-lang-defconst c-paragraph-separate
1684 "Regexp to append to `paragraph-separate'."
1686 pike (c-lang-const c-paragraph-start))
1687 (c-lang-defvar c-paragraph-separate (c-lang-const c-paragraph-separate))
1692 ;; Note: All and only all language constants containing keyword lists
1693 ;; should end with "-kwds"; they're automatically collected into the
1694 ;; `c-kwds-lang-consts' list below and used to build `c-keywords' etc.
1696 (c-lang-defconst c-primitive-type-kwds
1697 "Primitive type keywords. As opposed to the other keyword lists, the
1698 keywords listed here are fontified with the type face instead of the
1701 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1702 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1703 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1706 Do not try to modify this list for end user customizations; the
1707 `*-font-lock-extra-types' variable, where `*' is the mode prefix, is
1708 the appropriate place for that."
1709 t '("char" "double" "float" "int" "long" "short" "signed"
1712 '("_Bool" "_Complex" "_Imaginary") ; Conditionally defined in C99.
1713 (c-lang-const c-primitive-type-kwds))
1715 '("bool" "wchar_t" "char16_t" "char32_t")
1716 (c-lang-const c-primitive-type-kwds))
1717 ;; Objective-C extends C, but probably not the new stuff in C99.
1719 '("id" "Class" "SEL" "IMP" "BOOL")
1720 (c-lang-const c-primitive-type-kwds))
1721 java '("boolean" "byte" "char" "double" "float" "int" "long" "short" "void")
1722 idl '("Object" "ValueBase" "any" "boolean" "char" "double" "fixed" "float"
1723 "long" "octet" "sequence" "short" "string" "void" "wchar" "wstring"
1726 ;; The following can't really end a type, but we have to specify them
1727 ;; here due to the assumption in `c-primitive-type-prefix-kwds'. It
1728 ;; doesn't matter that much.
1729 "unsigned" "strong")
1730 pike '(;; this_program isn't really a keyword, but it's practically
1731 ;; used as a builtin type.
1732 "array" "float" "function" "int" "mapping" "mixed" "multiset"
1733 "object" "program" "string" "this_program" "void"))
1735 (c-lang-defconst c-primitive-type-key
1736 ;; An adorned regexp that matches `c-primitive-type-kwds'.
1737 t (c-make-keywords-re t (c-lang-const c-primitive-type-kwds)))
1738 (c-lang-defvar c-primitive-type-key (c-lang-const c-primitive-type-key))
1740 (c-lang-defconst c-primitive-type-prefix-kwds
1741 "Keywords that might act as prefixes for primitive types. Assumed to
1742 be a subset of `c-primitive-type-kwds'."
1744 (c c++) '("long" "short" "signed" "unsigned")
1745 idl '("long" "unsigned"
1749 (c-lang-defconst c-typedef-kwds
1750 "Prefix keyword(s) like \"typedef\" which make a type declaration out
1751 of a variable declaration."
1755 (c-lang-defconst c-typedef-key
1756 ;; Adorned regexp matching `c-typedef-kwds'.
1757 t (c-make-keywords-re t (c-lang-const c-typedef-kwds)))
1758 (c-lang-defvar c-typedef-key (c-lang-const c-typedef-key))
1760 (c-lang-defconst c-typeof-kwds
1761 "Keywords followed by a parenthesized expression, which stands for
1762 the type of that expression."
1764 c '("typeof") ; longstanding GNU C(++) extension.
1765 c++ '("decltype" "typeof"))
1767 (c-lang-defconst c-typeof-key
1768 ;; Adorned regexp matching `c-typeof-kwds'.
1769 t (c-make-keywords-re t (c-lang-const c-typeof-kwds)))
1770 (c-lang-defvar c-typeof-key (c-lang-const c-typeof-key))
1772 (c-lang-defconst c-type-prefix-kwds
1773 "Keywords where the following name - if any - is a type name, and
1774 where the keyword together with the symbol works as a type in
1777 Note that an alternative if the second part doesn't hold is
1778 `c-type-list-kwds'. Keywords on this list are typically also present
1779 on one of the `*-decl-kwds' lists."
1781 c '("struct" "union" "enum")
1782 c++ (append '("class" "typename")
1783 (c-lang-const c-type-prefix-kwds c)))
1785 (c-lang-defconst c-type-prefix-key
1786 ;; Adorned regexp matching `c-type-prefix-kwds'.
1787 t (c-make-keywords-re t (c-lang-const c-type-prefix-kwds)))
1788 (c-lang-defvar c-type-prefix-key (c-lang-const c-type-prefix-key))
1790 (c-lang-defconst c-type-modifier-kwds
1791 "Type modifier keywords. These can occur almost anywhere in types
1792 but they don't build a type of themselves. Unlike the keywords on
1793 `c-primitive-type-kwds', they are fontified with the keyword face and
1796 c '("const" "restrict" "volatile")
1797 c++ '("const" "constexpr" "noexcept" "volatile" "throw" "final" "override")
1798 objc '("const" "volatile"))
1800 (c-lang-defconst c-opt-type-modifier-key
1801 ;; Adorned regexp matching `c-type-modifier-kwds', or nil in
1802 ;; languages without such keywords.
1803 t (and (c-lang-const c-type-modifier-kwds)
1804 (c-make-keywords-re t (c-lang-const c-type-modifier-kwds))))
1805 (c-lang-defvar c-opt-type-modifier-key (c-lang-const c-opt-type-modifier-key))
1807 (c-lang-defconst c-opt-type-component-key
1808 ;; An adorned regexp that matches `c-primitive-type-prefix-kwds' and
1809 ;; `c-type-modifier-kwds', or nil in languages without any of them.
1810 t (and (or (c-lang-const c-primitive-type-prefix-kwds)
1811 (c-lang-const c-type-modifier-kwds))
1812 (c-make-keywords-re t
1813 (append (c-lang-const c-primitive-type-prefix-kwds)
1814 (c-lang-const c-type-modifier-kwds)))))
1815 (c-lang-defvar c-opt-type-component-key
1816 (c-lang-const c-opt-type-component-key))
1818 (c-lang-defconst c-type-start-kwds
1819 ;; All keywords that can start a type (i.e. are either a type prefix
1820 ;; or a complete type).
1821 t (c--delete-duplicates (append (c-lang-const c-primitive-type-kwds)
1822 (c-lang-const c-type-prefix-kwds)
1823 (c-lang-const c-type-modifier-kwds))
1824 :test 'string-equal))
1826 (c-lang-defconst c-class-decl-kwds
1827 "Keywords introducing declarations where the following block (if any)
1828 contains another declaration level that should be considered a class.
1830 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1831 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1832 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1835 Note that presence on this list does not automatically treat the
1836 following identifier as a type; the keyword must also be present on
1837 `c-type-prefix-kwds' or `c-type-list-kwds' to accomplish that."
1839 c '("struct" "union")
1840 c++ '("class" "struct" "union")
1841 objc '("struct" "union"
1842 "@interface" "@implementation" "@protocol")
1843 java '("class" "@interface" "interface")
1844 idl '("component" "eventtype" "exception" "home" "interface" "struct"
1847 "storagehome" "storagetype"
1849 "catalog" "executor" "manages" "segment")
1852 (c-lang-defconst c-class-key
1853 ;; Regexp matching the start of a class.
1854 t (c-make-keywords-re t (c-lang-const c-class-decl-kwds)))
1855 (c-lang-defvar c-class-key (c-lang-const c-class-key))
1857 (c-lang-defconst c-brace-list-decl-kwds
1858 "Keywords introducing declarations where the following block (if
1859 any) is a brace list.
1861 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1862 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1863 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1868 (c-lang-defconst c-brace-list-key
1869 ;; Regexp matching the start of declarations where the following
1870 ;; block is a brace list.
1871 t (c-make-keywords-re t (c-lang-const c-brace-list-decl-kwds)))
1872 (c-lang-defvar c-brace-list-key (c-lang-const c-brace-list-key))
1874 (c-lang-defconst c-after-brace-list-decl-kwds
1875 "Keywords that might follow keywords in `c-brace-list-decl-kwds'
1876 and precede the opening brace."
1878 c++ '("class" "struct"))
1880 (c-lang-defconst c-after-brace-list-key
1881 ;; Regexp matching keywords that can fall between a brace-list
1882 ;; keyword and the associated brace list.
1883 t (c-make-keywords-re t (c-lang-const c-after-brace-list-decl-kwds)))
1884 (c-lang-defvar c-after-brace-list-key (c-lang-const c-after-brace-list-key))
1886 (c-lang-defconst c-recognize-post-brace-list-type-p
1887 "Set to t when we recognize a colon and then a type after an enum,
1888 e.g., enum foo : int { A, B, C };"
1891 (c-lang-defvar c-recognize-post-brace-list-type-p
1892 (c-lang-const c-recognize-post-brace-list-type-p))
1894 (c-lang-defconst c-other-block-decl-kwds
1895 "Keywords where the following block (if any) contains another
1896 declaration level that should not be considered a class. For every
1897 keyword here, CC Mode will add a set of special syntactic symbols for
1898 those blocks. E.g. if the keyword is \"foo\" then there will be
1899 `foo-open', `foo-close', and `infoo' symbols.
1901 The intention is that this category should be used for block
1902 constructs that aren't related to object orientation concepts like
1903 classes (which thus also include e.g. interfaces, templates,
1904 contracts, structs, etc). The more pragmatic distinction is that
1905 while most want some indentation inside classes, it's fairly common
1906 that they don't want it in some of these constructs, so it should be
1907 simple to configure that differently from classes. See also
1908 `c-class-decl-kwds'.
1910 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1911 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1912 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1915 (c objc) '("extern")
1916 c++ '("namespace" "extern")
1921 (c-lang-defconst c-other-decl-block-key
1922 ;; Regexp matching the start of blocks besides classes that contain
1923 ;; another declaration level.
1924 t (c-make-keywords-re t (c-lang-const c-other-block-decl-kwds)))
1925 (c-lang-defvar c-other-decl-block-key (c-lang-const c-other-decl-block-key))
1927 (c-lang-defvar c-other-decl-block-key-in-symbols-alist
1931 (if (string= elt "extern")
1933 (intern (concat "in" elt)))))
1934 (c-lang-const c-other-block-decl-kwds))
1935 "Alist associating keywords in c-other-decl-block-decl-kwds with
1936 their matching \"in\" syntactic symbols.")
1938 (c-lang-defconst c-typedef-decl-kwds
1939 "Keywords introducing declarations where the identifier(s) being
1942 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1943 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1944 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1946 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1947 ;; (since e.g. "Foo" is a type that's being defined in "class Foo
1949 t (append (c-lang-const c-class-decl-kwds)
1950 (c-lang-const c-brace-list-decl-kwds))
1951 ;; Languages that have a "typedef" construct.
1952 (c c++ objc idl pike) (append (c-lang-const c-typedef-decl-kwds)
1954 ;; Unlike most other languages, exception names are not handled as
1955 ;; types in IDL since they only can occur in "raises" specs.
1956 idl (delete "exception" (append (c-lang-const c-typedef-decl-kwds) nil)))
1958 (c-lang-defconst c-typedef-decl-key
1959 t (c-make-keywords-re t (c-lang-const c-typedef-decl-kwds)))
1960 (c-lang-defvar c-typedef-decl-key (c-lang-const c-typedef-decl-key))
1962 (c-lang-defconst c-typeless-decl-kwds
1963 "Keywords introducing declarations where the \(first) identifier
1964 \(declarator) follows directly after the keyword, without any type.
1966 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1967 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1968 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1970 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1971 ;; (since e.g. "Foo" is the identifier being defined in "class Foo
1973 t (append (c-lang-const c-class-decl-kwds)
1974 (c-lang-const c-brace-list-decl-kwds))
1975 c++ (append (c-lang-const c-typeless-decl-kwds) '("auto")) ; C++11.
1976 ;; Note: "manages" for CORBA CIDL clashes with its presence on
1977 ;; `c-type-list-kwds' for IDL.
1978 idl (append (c-lang-const c-typeless-decl-kwds)
1979 '("factory" "finder" "native"
1984 pike (append (c-lang-const c-class-decl-kwds)
1987 (c-lang-defconst c-modifier-kwds
1988 "Keywords that can prefix normal declarations of identifiers
1989 \(and typically act as flags). Things like argument declarations
1990 inside function headers are also considered declarations in this
1993 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1994 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1995 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1998 (c c++) '("auto" "extern" "inline" "register" "static")
1999 c++ (append '("explicit" "friend" "mutable" "template" "thread_local"
2001 (c-lang-const c-modifier-kwds))
2002 objc '("auto" "bycopy" "byref" "extern" "in" "inout" "oneway" "out" "static")
2003 ;; FIXME: Some of those below ought to be on `c-other-decl-kwds' instead.
2004 idl '("abstract" "attribute" "const" "consumes" "custom" "emits" "import"
2005 "in" "inout" "local" "multiple" "oneway" "out" "private" "provides"
2006 "public" "publishes" "readonly" "typeid" "typeprefix" "uses"
2010 "bindsTo" "delegatesTo" "implements" "proxy" "storedOn")
2011 ;; Note: "const" is not used in Java, but it's still a reserved keyword.
2012 java '("abstract" "const" "default" "final" "native" "private" "protected"
2013 "public" "static" "strictfp" "synchronized" "transient" "volatile")
2014 pike '("final" "inline" "local" "nomask" "optional" "private" "protected"
2015 "public" "static" "variant"))
2017 (c-lang-defconst c-other-decl-kwds
2018 "Keywords that can start or prefix any declaration level construct,
2019 besides those on `c-class-decl-kwds', `c-brace-list-decl-kwds',
2020 `c-other-block-decl-kwds', `c-typedef-decl-kwds',
2021 `c-typeless-decl-kwds' and `c-modifier-kwds'.
2023 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
2024 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
2025 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
2028 objc '("@class" "@end" "@defs")
2029 java '("import" "package")
2030 pike '("import" "inherit"))
2032 (c-lang-defconst c-decl-start-kwds
2033 "Keywords that always start declarations, wherever they occur.
2034 This can be used for declarations that aren't recognized by the normal
2035 combination of `c-decl-prefix-re' and `c-decl-start-re'."
2037 ;; Classes can be declared anywhere in a Pike expression.
2040 (c-lang-defconst c-decl-hangon-kwds
2041 "Keywords that can occur anywhere in a declaration level construct.
2042 This is used for self-contained things that can be tacked on anywhere
2043 on a declaration and that should be ignored to be able to recognize it
2044 correctly. Typical cases are compiler extensions like
2045 \"__attribute__\" or \"__declspec\":
2047 __declspec(noreturn) void foo();
2048 class __declspec(dllexport) classname {...};
2049 void foo() __attribute__((noreturn));
2051 Note that unrecognized plain symbols are skipped anyway if they occur
2052 before the type, so such things are not necessary to mention here.
2053 Mentioning them here is necessary only if they can occur in other
2054 places, or if they are followed by a construct that must be skipped
2055 over \(like the parens in the \"__attribute__\" and \"__declspec\"
2056 examples above). In the last case, they alse need to be present on
2057 one of `c-type-list-kwds', `c-ref-list-kwds',
2058 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
2059 `c-<>-type-kwds', or `c-<>-arglist-kwds'."
2060 ;; NB: These are currently not recognized in all parts of a
2061 ;; declaration. Specifically, they aren't recognized in the middle
2062 ;; of multi-token types, inside declarators, and between the
2063 ;; identifier and the arglist paren of a function declaration.
2065 ;; FIXME: This ought to be user customizable since compiler stuff
2066 ;; like this usually is wrapped in project specific macros. (It'd
2067 ;; of course be even better if we could cope without knowing this.)
2069 (c c++) '(;; GCC extension.
2074 (c-lang-defconst c-decl-hangon-key
2075 ;; Adorned regexp matching `c-decl-hangon-kwds'.
2076 t (c-make-keywords-re t (c-lang-const c-decl-hangon-kwds)))
2077 (c-lang-defvar c-decl-hangon-key (c-lang-const c-decl-hangon-key))
2079 (c-lang-defconst c-prefix-spec-kwds
2080 ;; All keywords that can occur in the preamble of a declaration.
2081 ;; They typically occur before the type, but they are also matched
2082 ;; after presumptive types since we often can't be sure that
2083 ;; something is a type or just some sort of macro in front of the
2084 ;; declaration. They might be ambiguous with types or type
2086 t (c--delete-duplicates (append (c-lang-const c-class-decl-kwds)
2087 (c-lang-const c-brace-list-decl-kwds)
2088 (c-lang-const c-other-block-decl-kwds)
2089 (c-lang-const c-typedef-decl-kwds)
2090 (c-lang-const c-typeless-decl-kwds)
2091 (c-lang-const c-modifier-kwds)
2092 (c-lang-const c-other-decl-kwds)
2093 (c-lang-const c-decl-start-kwds)
2094 (c-lang-const c-decl-hangon-kwds))
2095 :test 'string-equal))
2097 (c-lang-defconst c-prefix-spec-kwds-re
2098 ;; Adorned regexp of `c-prefix-spec-kwds'.
2099 t (c-make-keywords-re t (c-lang-const c-prefix-spec-kwds)))
2101 (c-lang-defvar c-prefix-spec-kwds-re (c-lang-const c-prefix-spec-kwds-re))
2103 (c-lang-defconst c-specifier-key
2104 ;; Adorned regexp of the keywords in `c-prefix-spec-kwds' that aren't
2105 ;; ambiguous with types or type prefixes. These are the keywords (like
2106 ;; extern, namespace, but NOT template) that can modify a declaration.
2107 t (c-make-keywords-re t
2108 (c--set-difference (c-lang-const c-prefix-spec-kwds)
2109 (append (c-lang-const c-type-start-kwds)
2110 (c-lang-const c-<>-arglist-kwds))
2111 :test 'string-equal)))
2112 (c-lang-defvar c-specifier-key (c-lang-const c-specifier-key))
2114 (c-lang-defconst c-postfix-spec-kwds
2115 ;; Keywords that can occur after argument list of a function header
2116 ;; declaration, i.e. in the "K&R region".
2117 t (append (c-lang-const c-postfix-decl-spec-kwds)
2118 (c-lang-const c-decl-hangon-kwds)))
2120 (c-lang-defconst c-not-decl-init-keywords
2121 ;; Adorned regexp matching all keywords that can't appear at the
2122 ;; start of a declaration.
2123 t (c-make-keywords-re t
2124 (c--set-difference (c-lang-const c-keywords)
2125 (append (c-lang-const c-type-start-kwds)
2126 (c-lang-const c-prefix-spec-kwds)
2127 (c-lang-const c-typeof-kwds))
2128 :test 'string-equal)))
2129 (c-lang-defvar c-not-decl-init-keywords
2130 (c-lang-const c-not-decl-init-keywords))
2132 (c-lang-defconst c-not-primitive-type-keywords
2133 "List of all keywords apart from primitive types (like \"int\")."
2134 t (c--set-difference (c-lang-const c-keywords)
2135 (c-lang-const c-primitive-type-kwds)
2136 :test 'string-equal)
2137 ;; The "more" for C++ is the QT keyword (as in "more slots:").
2138 ;; This variable is intended for use in c-beginning-of-statement-1.
2139 c++ (append (c-lang-const c-not-primitive-type-keywords) '("more")))
2141 (c-lang-defconst c-not-primitive-type-keywords-regexp
2142 t (c-make-keywords-re t
2143 (c-lang-const c-not-primitive-type-keywords)))
2144 (c-lang-defvar c-not-primitive-type-keywords-regexp
2145 (c-lang-const c-not-primitive-type-keywords-regexp))
2147 (c-lang-defconst c-protection-kwds
2148 "Access protection label keywords in classes."
2150 c++ '("private" "protected" "public")
2151 objc '("@private" "@protected" "@public"))
2153 (c-lang-defconst c-block-decls-with-vars
2154 "Keywords introducing declarations that can contain a block which
2155 might be followed by variable declarations, e.g. like \"foo\" in
2156 \"class Foo { ... } foo;\". So if there is a block in a declaration
2157 like that, it ends with the following `;' and not right away.
2159 The keywords on list are assumed to also be present on one of the
2160 `*-decl-kwds' lists."
2162 (c objc) '("struct" "union" "enum" "typedef")
2163 c++ '("class" "struct" "union" "enum" "typedef"))
2165 (c-lang-defconst c-opt-block-decls-with-vars-key
2166 ;; Regexp matching the `c-block-decls-with-vars' keywords, or nil in
2167 ;; languages without such constructs.
2168 t (and (c-lang-const c-block-decls-with-vars)
2169 (c-make-keywords-re t (c-lang-const c-block-decls-with-vars))))
2170 (c-lang-defvar c-opt-block-decls-with-vars-key
2171 (c-lang-const c-opt-block-decls-with-vars-key))
2173 (c-lang-defconst c-postfix-decl-spec-kwds
2174 "Keywords introducing extra declaration specifiers in the region
2175 between the header and the body \(i.e. the \"K&R-region\") in
2178 java '("extends" "implements" "throws")
2179 idl '("context" "getraises" "manages" "primarykey" "raises" "setraises"
2182 "as" "const" "implements" "of" "ref"))
2184 (c-lang-defconst c-postfix-decl-spec-key
2185 ;; Regexp matching the keywords in `c-postfix-decl-spec-kwds'.
2186 t (c-make-keywords-re t (c-lang-const c-postfix-decl-spec-kwds)))
2187 (c-lang-defvar c-postfix-decl-spec-key
2188 (c-lang-const c-postfix-decl-spec-key))
2190 (c-lang-defconst c-nonsymbol-sexp-kwds
2191 "Keywords that may be followed by a nonsymbol sexp before whatever
2192 construct it's part of continues."
2194 (c c++ objc) '("extern"))
2196 (c-lang-defconst c-type-list-kwds
2197 "Keywords that may be followed by a comma separated list of type
2198 identifiers, where each optionally can be prefixed by keywords. (Can
2199 also be used for the special case when the list can contain only one
2202 Assumed to be mutually exclusive with `c-ref-list-kwds'. There's no
2203 reason to put keywords on this list if they are on `c-type-prefix-kwds'.
2204 There's also no reason to add keywords that prefixes a normal
2205 declaration consisting of a type followed by a declarator (list), so
2206 the keywords on `c-modifier-kwds' should normally not be listed here
2209 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2210 or variable identifier (that's being defined)."
2214 java '("import" "new" "extends" "super" "implements" "throws")
2215 idl '("manages" "native" "primarykey" "supports"
2217 "as" "implements" "of" "scope")
2220 (c-lang-defconst c-ref-list-kwds
2221 "Keywords that may be followed by a comma separated list of
2222 reference (i.e. namespace/scope/module) identifiers, where each
2223 optionally can be prefixed by keywords. (Can also be used for the
2224 special case when the list can contain only one element.) Assumed to
2225 be mutually exclusive with `c-type-list-kwds'.
2227 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2228 or variable identifier (that's being defined)."
2232 idl '("import" "module"
2237 (c-lang-defconst c-colon-type-list-kwds
2238 "Keywords that may be followed (not necessarily directly) by a colon
2239 and then a comma separated list of type identifiers, where each
2240 optionally can be prefixed by keywords. (Can also be used for the
2241 special case when the list can contain only one element.)"
2243 c++ '("class" "struct")
2244 idl '("component" "eventtype" "home" "interface" "valuetype"
2246 "storagehome" "storagetype"))
2248 (c-lang-defconst c-colon-type-list-re
2249 "Regexp matched after the keywords in `c-colon-type-list-kwds' to skip
2250 forward to the colon. The end of the match is assumed to be directly
2251 after the colon, so the regexp should end with \":\". Must be a
2252 regexp if `c-colon-type-list-kwds' isn't nil."
2253 t (if (c-lang-const c-colon-type-list-kwds)
2254 ;; Disallow various common punctuation chars that can't come
2255 ;; before the ":" that starts the inherit list after "class"
2256 ;; or "struct" in C++. (Also used as default for other
2258 "[^][{}();,/#=:]*:"))
2259 (c-lang-defvar c-colon-type-list-re (c-lang-const c-colon-type-list-re))
2261 (c-lang-defconst c-paren-nontype-kwds
2262 "Keywords that may be followed by a parenthesis expression that doesn't
2263 contain type identifiers."
2265 (c c++) '(;; GCC extension.
2270 (c-lang-defconst c-paren-nontype-key
2271 t (c-make-keywords-re t (c-lang-const c-paren-nontype-kwds)))
2272 (c-lang-defvar c-paren-nontype-key (c-lang-const c-paren-nontype-key))
2274 (c-lang-defconst c-paren-type-kwds
2275 "Keywords that may be followed by a parenthesis expression containing
2276 type identifiers separated by arbitrary tokens."
2281 pike '("array" "function" "int" "mapping" "multiset" "object" "program"))
2283 (c-lang-defconst c-paren-any-kwds
2284 t (c--delete-duplicates (append (c-lang-const c-paren-nontype-kwds)
2285 (c-lang-const c-paren-type-kwds))
2286 :test 'string-equal))
2288 (c-lang-defconst c-<>-type-kwds
2289 "Keywords that may be followed by an angle bracket expression
2290 containing type identifiers separated by \",\". The difference from
2291 `c-<>-arglist-kwds' is that unknown names are taken to be types and
2292 not other identifiers. `c-recognize-<>-arglists' is assumed to be set
2300 (c-lang-defconst c-<>-arglist-kwds
2301 "Keywords that can be followed by a C++ style template arglist; see
2302 `c-recognize-<>-arglists' for details. That language constant is
2303 assumed to be set if this isn't nil."
2306 idl '("fixed" "string" "wstring"))
2308 (c-lang-defconst c-<>-sexp-kwds
2309 ;; All keywords that can be followed by an angle bracket sexp.
2310 t (c--delete-duplicates (append (c-lang-const c-<>-type-kwds)
2311 (c-lang-const c-<>-arglist-kwds))
2312 :test 'string-equal))
2314 (c-lang-defconst c-opt-<>-sexp-key
2315 ;; Adorned regexp matching keywords that can be followed by an angle
2316 ;; bracket sexp. Always set when `c-recognize-<>-arglists' is.
2317 t (c-make-keywords-re t (c-lang-const c-<>-sexp-kwds)))
2318 (c-lang-defvar c-opt-<>-sexp-key (c-lang-const c-opt-<>-sexp-key))
2320 (c-lang-defconst c-inside-<>-type-kwds
2321 "Keywords which, used inside a C++ style template arglist, introduce a type."
2323 java '("extends" "super"))
2325 (c-lang-defconst c-inside-<>-type-key
2326 t (c-make-keywords-re t (c-lang-const c-inside-<>-type-kwds)))
2327 (c-lang-defvar c-inside-<>-type-key (c-lang-const c-inside-<>-type-key))
2329 (c-lang-defconst c-brace-id-list-kwds
2330 "Keywords that may be followed by a brace block containing a comma
2331 separated list of identifier definitions, i.e. like the list of
2332 identifiers that follows the type in a normal declaration."
2333 t (c-lang-const c-brace-list-decl-kwds))
2335 (c-lang-defconst c-block-stmt-1-kwds
2336 "Statement keywords followed directly by a substatement."
2338 c++ '("do" "else" "try")
2339 objc '("do" "else" "@finally" "@try")
2340 java '("do" "else" "finally" "try")
2343 (c-lang-defconst c-block-stmt-1-key
2344 ;; Regexp matching the start of any statement followed directly by a
2345 ;; substatement (doesn't match a bare block, however).
2346 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-kwds)))
2347 (c-lang-defvar c-block-stmt-1-key (c-lang-const c-block-stmt-1-key))
2349 (c-lang-defconst c-block-stmt-1-2-kwds
2350 "Statement keywords optionally followed by a paren sexp.
2351 Keywords here should also be in `c-block-stmt-1-kwds'."
2355 (c-lang-defconst c-block-stmt-1-2-key
2356 ;; Regexp matching the start of a statement which may be followed by a
2357 ;; paren sexp and will then be followed by a substatement.
2358 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-2-kwds)))
2359 (c-lang-defvar c-block-stmt-1-2-key (c-lang-const c-block-stmt-1-2-key))
2361 (c-lang-defconst c-block-stmt-2-kwds
2362 "Statement keywords followed by a paren sexp and then by a substatement."
2363 t '("for" "if" "switch" "while")
2364 c++ '("for" "if" "switch" "while" "catch")
2365 objc '("for" "if" "switch" "while" "@catch" "@synchronized")
2366 java '("for" "if" "switch" "while" "catch" "synchronized")
2368 pike '("for" "if" "switch" "while" "foreach")
2369 awk '("for" "if" "while"))
2371 (c-lang-defconst c-block-stmt-2-key
2372 ;; Regexp matching the start of any statement followed by a paren sexp
2373 ;; and then by a substatement.
2374 t (c-make-keywords-re t (c-lang-const c-block-stmt-2-kwds)))
2375 (c-lang-defvar c-block-stmt-2-key (c-lang-const c-block-stmt-2-key))
2377 (c-lang-defconst c-block-stmt-kwds
2378 ;; Union of `c-block-stmt-1-kwds' and `c-block-stmt-2-kwds'.
2379 t (c--delete-duplicates (append (c-lang-const c-block-stmt-1-kwds)
2380 (c-lang-const c-block-stmt-2-kwds))
2381 :test 'string-equal))
2383 (c-lang-defconst c-opt-block-stmt-key
2384 ;; Regexp matching the start of any statement that has a
2385 ;; substatement (except a bare block). Nil in languages that
2386 ;; don't have such constructs.
2387 t (if (or (c-lang-const c-block-stmt-1-kwds)
2388 (c-lang-const c-block-stmt-2-kwds))
2389 (c-make-keywords-re t
2390 (append (c-lang-const c-block-stmt-1-kwds)
2391 (c-lang-const c-block-stmt-2-kwds)))))
2392 (c-lang-defvar c-opt-block-stmt-key (c-lang-const c-opt-block-stmt-key))
2394 (c-lang-defconst c-simple-stmt-kwds
2395 "Statement keywords followed by an expression or nothing."
2396 t '("break" "continue" "goto" "return")
2397 objc '("break" "continue" "goto" "return" "@throw")
2398 ;; Note: `goto' is not valid in Java, but the keyword is still reserved.
2399 java '("break" "continue" "goto" "return" "throw")
2401 pike '("break" "continue" "return")
2402 awk '(;; Not sure about "delete", "exit", "getline", etc. ; ACM 2002/5/30
2403 "break" "continue" "return" "delete" "exit" "getline" "next"
2404 "nextfile" "print" "printf"))
2406 (c-lang-defconst c-simple-stmt-key
2407 ;; Adorned regexp matching `c-simple-stmt-kwds'.
2408 t (c-make-keywords-re t (c-lang-const c-simple-stmt-kwds)))
2409 (c-lang-defvar c-simple-stmt-key (c-lang-const c-simple-stmt-key))
2411 (c-lang-defconst c-paren-stmt-kwds
2412 "Statement keywords followed by a parenthesis expression that
2413 nevertheless contains a list separated with `;' and not `,'."
2417 (c-lang-defconst c-paren-stmt-key
2418 ;; Adorned regexp matching `c-paren-stmt-kwds'.
2419 t (c-make-keywords-re t (c-lang-const c-paren-stmt-kwds)))
2420 (c-lang-defvar c-paren-stmt-key (c-lang-const c-paren-stmt-key))
2422 (c-lang-defconst c-asm-stmt-kwds
2423 "Statement keywords followed by an assembler expression."
2425 (c c++) '("asm" "__asm__")) ;; Not standard, but common.
2427 (c-lang-defconst c-opt-asm-stmt-key
2428 ;; Regexp matching the start of an assembler statement. Nil in
2429 ;; languages that don't support that.
2430 t (if (c-lang-const c-asm-stmt-kwds)
2431 (c-make-keywords-re t (c-lang-const c-asm-stmt-kwds))))
2432 (c-lang-defvar c-opt-asm-stmt-key (c-lang-const c-opt-asm-stmt-key))
2434 (c-lang-defconst c-case-kwds
2435 "The keyword(s) which introduce a \"case\" like construct.
2436 This construct is \"<keyword> <expression> :\"."
2440 (c-lang-defconst c-case-kwds-regexp
2441 ;; Adorned regexp matching any "case"-like keyword.
2442 t (c-make-keywords-re t (c-lang-const c-case-kwds)))
2443 (c-lang-defvar c-case-kwds-regexp (c-lang-const c-case-kwds-regexp))
2445 (c-lang-defconst c-label-kwds
2446 "Keywords introducing colon terminated labels in blocks."
2447 t '("case" "default"))
2449 (c-lang-defconst c-label-kwds-regexp
2450 ;; Adorned regexp matching any keyword that introduces a label.
2451 t (c-make-keywords-re t (c-lang-const c-label-kwds)))
2452 (c-lang-defvar c-label-kwds-regexp (c-lang-const c-label-kwds-regexp))
2454 (c-lang-defconst c-before-label-kwds
2455 "Keywords that might be followed by a label identifier."
2457 (java pike) (append '("break" "continue")
2458 (c-lang-const c-before-label-kwds))
2462 (c-lang-defconst c-constant-kwds
2463 "Keywords for constants."
2465 c '("NULL" ;; Not a keyword, but practically works as one.
2466 "false" "true") ; Defined in C99.
2469 (c-lang-const c-constant-kwds c))
2470 objc '("nil" "Nil" "YES" "NO" "NS_DURING" "NS_HANDLER" "NS_ENDHANDLER")
2471 idl '("TRUE" "FALSE")
2472 java '("true" "false" "null") ; technically "literals", not keywords
2473 pike '("UNDEFINED")) ;; Not a keyword, but practically works as one.
2475 (c-lang-defconst c-primary-expr-kwds
2476 "Keywords besides constants and operators that start primary expressions."
2478 c++ '("operator" "this")
2479 objc '("super" "self")
2481 pike '("this")) ;; Not really a keyword, but practically works as one.
2483 (c-lang-defconst c-expr-kwds
2484 ;; Keywords that can occur anywhere in expressions. Built from
2485 ;; `c-primary-expr-kwds' and all keyword operators in `c-operators'.
2486 t (c--delete-duplicates
2487 (append (c-lang-const c-primary-expr-kwds)
2488 (c-filter-ops (c-lang-const c-operator-list)
2490 "\\`\\(\\w\\|\\s_\\)+\\'"))
2491 :test 'string-equal))
2493 (c-lang-defconst c-lambda-kwds
2494 "Keywords that start lambda constructs, i.e. function definitions in
2499 (c-lang-defconst c-inexpr-block-kwds
2500 "Keywords that start constructs followed by statement blocks which can
2501 be used in expressions \(the gcc extension for this in C and C++ is
2502 handled separately by `c-recognize-paren-inexpr-blocks')."
2504 pike '("catch" "gauge"))
2506 (c-lang-defconst c-inexpr-class-kwds
2507 "Keywords that can start classes inside expressions."
2512 (c-lang-defconst c-inexpr-brace-list-kwds
2513 "Keywords that can start brace list blocks inside expressions.
2514 Note that Java specific rules are currently applied to tell this from
2515 `c-inexpr-class-kwds'."
2519 (c-lang-defconst c-opt-inexpr-brace-list-key
2520 ;; Regexp matching the start of a brace list in an expression, or
2521 ;; nil in languages that don't have such things. This should not
2522 ;; match brace lists recognized through `c-special-brace-lists'.
2523 t (and (c-lang-const c-inexpr-brace-list-kwds)
2524 (c-make-keywords-re t (c-lang-const c-inexpr-brace-list-kwds))))
2525 (c-lang-defvar c-opt-inexpr-brace-list-key
2526 (c-lang-const c-opt-inexpr-brace-list-key))
2528 (c-lang-defconst c-decl-block-key
2529 ;; Regexp matching keywords in any construct that contain another
2530 ;; declaration level, i.e. that isn't followed by a function block
2531 ;; or brace list. When the first submatch matches, it's an
2532 ;; unambiguous construct, otherwise it's an ambiguous match that
2533 ;; might also be the return type of a function declaration.
2534 t (let* ((decl-kwds (append (c-lang-const c-class-decl-kwds)
2535 (c-lang-const c-other-block-decl-kwds)
2536 (c-lang-const c-inexpr-class-kwds)))
2537 (unambiguous (c--set-difference decl-kwds
2538 (c-lang-const c-type-start-kwds)
2539 :test 'string-equal))
2540 (ambiguous (c--intersection decl-kwds
2541 (c-lang-const c-type-start-kwds)
2542 :test 'string-equal)))
2544 (concat (c-make-keywords-re t unambiguous)
2546 (c-make-keywords-re t ambiguous))
2547 (c-make-keywords-re t unambiguous))))
2548 (c-lang-defvar c-decl-block-key (c-lang-const c-decl-block-key))
2550 (c-lang-defconst c-bitfield-kwds
2551 "Keywords that can introduce bitfields."
2553 (c c++ objc) '("char" "int" "long" "signed" "unsigned"))
2555 (c-lang-defconst c-opt-bitfield-key
2556 ;; Regexp matching the start of a bitfield (not uniquely), or nil in
2557 ;; languages without bitfield support.
2559 (c c++) (c-make-keywords-re t (c-lang-const c-bitfield-kwds)))
2560 (c-lang-defvar c-opt-bitfield-key (c-lang-const c-opt-bitfield-key))
2562 (c-lang-defconst c-other-kwds
2563 "Keywords not accounted for by any other `*-kwds' language constant."
2566 ;; In CORBA CIDL: (These are declaration keywords that never
2567 ;; can start a declaration.)
2568 "entity" "process" "service" "session" "storage"))
2571 ;;; Constants built from keywords.
2573 ;; Note: No `*-kwds' language constants may be defined below this point.
2576 (defconst c-kwds-lang-consts
2577 ;; List of all the language constants that contain keyword lists.
2579 (mapatoms (lambda (sym)
2580 (when (and (boundp sym)
2581 (string-match "-kwds\\'" (symbol-name sym)))
2582 ;; Make the list of globally interned symbols
2583 ;; instead of ones interned in `c-lang-constants'.
2584 (setq list (cons (intern (symbol-name sym)) list))))
2588 (c-lang-defconst c-keywords
2589 ;; All keywords as a list.
2590 t (c--delete-duplicates
2591 (c-lang-defconst-eval-immediately
2592 `(append ,@(mapcar (lambda (kwds-lang-const)
2593 `(c-lang-const ,kwds-lang-const))
2596 :test 'string-equal))
2598 (c-lang-defconst c-keywords-regexp
2599 ;; All keywords as an adorned regexp.
2600 t (c-make-keywords-re t (c-lang-const c-keywords)))
2601 (c-lang-defvar c-keywords-regexp (c-lang-const c-keywords-regexp))
2603 (c-lang-defconst c-keyword-member-alist
2604 ;; An alist with all the keywords in the cars. The cdr for each
2605 ;; keyword is a list of the symbols for the `*-kwds' lists that
2607 t (let ((kwd-list-alist
2608 (c-lang-defconst-eval-immediately
2609 `(list ,@(mapcar (lambda (kwds-lang-const)
2610 `(cons ',kwds-lang-const
2611 (c-lang-const ,kwds-lang-const)))
2612 c-kwds-lang-consts))))
2613 lang-const kwd-list kwd
2615 (while kwd-list-alist
2616 (setq lang-const (caar kwd-list-alist)
2617 kwd-list (cdar kwd-list-alist)
2618 kwd-list-alist (cdr kwd-list-alist))
2620 (setq kwd (car kwd-list)
2621 kwd-list (cdr kwd-list))
2622 (unless (setq elem (assoc kwd result-alist))
2623 (setq result-alist (cons (setq elem (list kwd)) result-alist)))
2624 (unless (memq lang-const (cdr elem))
2625 (setcdr elem (cons lang-const (cdr elem))))))
2628 (c-lang-defvar c-keywords-obarray
2629 ;; An obarray containing all keywords as symbols. The property list
2630 ;; of each symbol has a non-nil entry for the specific `*-kwds'
2631 ;; lists it's a member of.
2633 ;; E.g. to see whether the string str contains a keyword on
2634 ;; `c-class-decl-kwds', one can do like this:
2635 ;; (get (intern-soft str c-keyword-obarray) 'c-class-decl-kwds)
2636 ;; Which preferably is written using the associated functions in
2638 ;; (c-keyword-member (c-keyword-sym str) 'c-class-decl-kwds)
2640 ;; The obarray is not stored directly as a language constant since
2641 ;; the printed representation for obarrays used in .elc files isn't
2644 (let* ((alist (c-lang-const c-keyword-member-alist))
2646 (obarray (make-vector (* (length alist) 2) 0)))
2648 (setq kwd (caar alist)
2649 lang-const-list (cdar alist)
2651 (setplist (intern kwd obarray)
2652 ;; Emacs has an odd bug that causes `mapcan' to fail
2653 ;; with unintelligible errors. (XEmacs works.)
2654 ;; (2015-06-24): This bug has not yet been fixed.
2655 ;;(mapcan (lambda (lang-const)
2656 ;; (list lang-const t))
2658 (apply 'nconc (mapcar (lambda (lang-const)
2659 (list lang-const t))
2663 (c-lang-defconst c-regular-keywords-regexp
2664 ;; Adorned regexp matching all keywords that should be fontified
2665 ;; with the keywords face. I.e. that aren't types or constants.
2666 t (c-make-keywords-re t
2667 (c--set-difference (c-lang-const c-keywords)
2668 (append (c-lang-const c-primitive-type-kwds)
2669 (c-lang-const c-constant-kwds))
2670 :test 'string-equal)))
2671 (c-lang-defvar c-regular-keywords-regexp
2672 (c-lang-const c-regular-keywords-regexp))
2674 (c-lang-defconst c-primary-expr-regexp
2675 ;; Regexp matching the start of any primary expression, i.e. any
2676 ;; literal, symbol, prefix operator, and '('. It doesn't need to
2677 ;; exclude keywords; they are excluded afterwards unless the second
2678 ;; submatch matches. If the first but not the second submatch
2679 ;; matches then it is an ambiguous primary expression; it could also
2680 ;; be a match of e.g. an infix operator. (The case with ambiguous
2681 ;; keyword operators isn't handled.)
2683 t (let* ((prefix-ops
2684 (c-filter-ops (c-lang-const c-operators)
2687 ;; Filter out the special case prefix
2688 ;; operators that are close parens.
2689 (not (string-match "\\s)" op)))))
2691 (nonkeyword-prefix-ops
2692 (c-filter-ops prefix-ops
2694 "\\`\\(\\s.\\|\\s(\\|\\s)\\)+\\'"))
2697 (c-filter-ops (c-lang-const c-operators)
2702 right-assoc-sequence)
2705 (unambiguous-prefix-ops (c--set-difference nonkeyword-prefix-ops
2707 :test 'string-equal))
2708 (ambiguous-prefix-ops (c--intersection nonkeyword-prefix-ops
2710 :test 'string-equal)))
2714 ;; Take out all symbol class operators from `prefix-ops' and make the
2715 ;; first submatch from them together with `c-primary-expr-kwds'.
2716 (c-make-keywords-re t
2717 (append (c-lang-const c-primary-expr-kwds)
2718 (c--set-difference prefix-ops nonkeyword-prefix-ops
2719 :test 'string-equal)))
2722 ;; Match all ambiguous operators.
2723 (c-make-keywords-re nil
2724 (c--intersection nonkeyword-prefix-ops in-or-postfix-ops
2725 :test 'string-equal))
2729 ;; Now match all other symbols.
2730 (c-lang-const c-symbol-start)
2733 ;; The chars that can start integer and floating point
2738 ;; The unambiguous operators from `prefix-ops'.
2739 (c-make-keywords-re nil
2740 (c--set-difference nonkeyword-prefix-ops in-or-postfix-ops
2741 :test 'string-equal))
2744 ;; Match string and character literals.
2746 (if (memq 'gen-string-delim c-emacs-features)
2749 (c-lang-defvar c-primary-expr-regexp (c-lang-const c-primary-expr-regexp))
2752 ;;; Additional constants for parser-level constructs.
2754 (c-lang-defconst c-decl-start-colon-kwd-re
2755 "Regexp matching a keyword that is followed by a colon, where
2756 the whole construct can precede a declaration.
2757 E.g. \"public:\" in C++."
2759 c++ (c-make-keywords-re t (c-lang-const c-protection-kwds)))
2760 (c-lang-defvar c-decl-start-colon-kwd-re
2761 (c-lang-const c-decl-start-colon-kwd-re))
2763 (c-lang-defconst c-decl-prefix-re
2764 "Regexp matching something that might precede a declaration, cast or
2765 label, such as the last token of a preceding statement or declaration.
2766 This is used in the common situation where a declaration or cast
2767 doesn't start with any specific token that can be searched for.
2769 The regexp should not match bob; that is done implicitly. It can't
2770 require a match longer than one token. The end of the token is taken
2771 to be at the end of the first submatch, which is assumed to always
2772 match. It's undefined whether identifier syntax (see
2773 `c-identifier-syntax-table') is in effect or not. This regexp is
2774 assumed to be a superset of `c-label-prefix-re' if
2775 `c-recognize-colon-labels' is set.
2777 Besides this, `c-decl-start-kwds' is used to find declarations.
2779 Note: This variable together with `c-decl-start-re' and
2780 `c-decl-start-kwds' is only used to detect \"likely\"
2781 declaration/cast/label starts. I.e. they might produce more matches
2782 but should not miss anything (or else it's necessary to use text
2783 properties - see the next note). Wherever they match, the following
2784 construct is analyzed to see if it indeed is a declaration, cast or
2785 label. That analysis is not cheap, so it's important that not too
2786 many false matches are triggered.
2788 Note: If a declaration/cast/label start can't be detected with this
2789 variable, it's necessary to use the `c-type' text property with the
2790 value `c-decl-end' on the last char of the last token preceding the
2791 declaration. See the comment blurb at the start of cc-engine.el for
2794 ;; We match a sequence of characters to skip over things like \"};\"
2795 ;; more quickly. We match ")" in C for K&R region declarations, and
2796 ;; in all languages except Java for when a cpp macro definition
2797 ;; begins with a declaration.
2799 java "\\([{}(;,<]+\\)"
2800 ;; Match "<" in C++ to get the first argument in a template arglist.
2801 ;; In that case there's an additional check in `c-find-decl-spots'
2802 ;; that it got open paren syntax. Match ":" to aid in picking up
2803 ;; "public:", etc. This involves additional checks in
2804 ;; `c-find-decl-prefix-search' to prevent a match of identifiers
2806 c++ "\\([{}();:,<]+\\)"
2807 ;; Additionally match the protection directives in Objective-C.
2808 ;; Note that this doesn't cope with the longer directives, which we
2809 ;; would have to match from start to end since they don't end with
2810 ;; any easily recognized characters.
2811 objc (concat "\\([{}();,]+\\|"
2812 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
2814 ;; Pike is like C but we also match "[" for multiple value
2815 ;; assignments and type casts.
2816 pike "\\([{}()[;,]+\\)")
2817 (c-lang-defvar c-decl-prefix-re (c-lang-const c-decl-prefix-re)
2820 (c-lang-defconst c-decl-start-re
2821 "Regexp matching the start of any declaration, cast or label.
2822 It's used on the token after the one `c-decl-prefix-re' matched. This
2823 regexp should not try to match those constructs accurately as it's
2824 only used as a sieve to avoid spending more time checking other
2826 t (c-lang-const c-identifier-start))
2827 (c-lang-defvar c-decl-start-re (c-lang-const c-decl-start-re))
2829 (c-lang-defconst c-decl-prefix-or-start-re
2830 ;; Regexp matching something that might precede or start a
2831 ;; declaration, cast or label.
2833 ;; If the first submatch matches, it's taken to match the end of a
2834 ;; token that might precede such a construct, e.g. ';', '}' or '{'.
2835 ;; It's built from `c-decl-prefix-re'.
2837 ;; If the first submatch did not match, the match of the whole
2838 ;; regexp is taken to be at the first token in the declaration.
2839 ;; `c-decl-start-re' is not checked in this case.
2841 ;; Design note: The reason the same regexp is used to match both
2842 ;; tokens that precede declarations and start them is to avoid an
2843 ;; extra regexp search from the previous declaration spot in
2844 ;; `c-find-decl-spots'. Users of `c-find-decl-spots' also count on
2845 ;; that it finds all declaration/cast/label starts in approximately
2846 ;; linear order, so we can't do the searches in two separate passes.
2847 t (if (c-lang-const c-decl-start-kwds)
2848 (concat (c-lang-const c-decl-prefix-re)
2850 (c-make-keywords-re t (c-lang-const c-decl-start-kwds)))
2851 (c-lang-const c-decl-prefix-re)))
2852 (c-lang-defvar c-decl-prefix-or-start-re
2853 (c-lang-const c-decl-prefix-or-start-re)
2856 (c-lang-defconst c-cast-parens
2857 ;; List containing the paren characters that can open a cast, or nil in
2858 ;; languages without casts.
2859 t (c-filter-ops (c-lang-const c-operators)
2862 (lambda (op) (elt op 0))))
2863 (c-lang-defvar c-cast-parens (c-lang-const c-cast-parens))
2865 (c-lang-defconst c-block-prefix-disallowed-chars
2866 "List of syntactically relevant characters that never can occur before
2867 the open brace in any construct that contains a brace block, e.g. in
2868 the \"class Foo: public Bar\" part of:
2870 class Foo: public Bar {int x();} a, *b;
2872 If parens can occur, the chars inside those aren't filtered with this
2875 `<' and `>' should be disallowed even if angle bracket arglists can
2876 occur. That since the search function needs to stop at them anyway to
2877 ensure they are given paren syntax.
2879 This is used to skip backward from the open brace to find the region
2880 in which to look for a construct like \"class\", \"enum\",
2881 \"namespace\" or whatever. That skipping should be as tight as
2882 possible for good performance."
2884 ;; Default to all chars that only occurs in nonsymbol tokens outside
2886 t (c--set-difference
2887 (c-lang-const c-nonsymbol-token-char-list)
2888 (c-filter-ops (append (c-lang-const c-identifier-ops)
2890 (c-lang-const c-after-id-concat-ops))))
2895 (while (string-match "\\(\\s.\\|\\s(\\|\\s)\\)"
2897 (setq res (cons (aref op (match-beginning 1)) res)
2901 ;; Allow cpp operations (where applicable).
2902 t (if (c-lang-const c-opt-cpp-prefix)
2903 (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2905 (c-lang-const c-block-prefix-disallowed-chars))
2907 ;; Allow ':' for inherit list starters.
2908 (c++ objc idl) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2911 ;; Allow ',' for multiple inherits.
2912 (c++ java) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2915 ;; Allow parentheses for anonymous inner classes in Java and class
2916 ;; initializer lists in Pike.
2917 (java pike) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2920 ;; Allow '"' for extern clauses (e.g. extern "C" {...}).
2921 (c c++ objc) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2924 (c-lang-defconst c-block-prefix-charset
2925 ;; `c-block-prefix-disallowed-chars' as an inverted charset suitable
2926 ;; for `c-syntactic-skip-backward'.
2927 t (c-make-bare-char-alt (c-lang-const c-block-prefix-disallowed-chars) t))
2928 (c-lang-defvar c-block-prefix-charset (c-lang-const c-block-prefix-charset))
2930 (c-lang-defconst c-type-decl-prefix-key
2931 "Regexp matching any declarator operator that might precede the
2932 identifier in a declaration, e.g. the \"*\" in \"char *argv\". This
2933 regexp should match \"(\" if parentheses are valid in declarators.
2934 The end of the first submatch is taken as the end of the operator.
2935 Identifier syntax is in effect when this is matched \(see
2936 `c-identifier-syntax-table')."
2937 t (if (c-lang-const c-type-modifier-kwds)
2938 (concat (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>")
2939 ;; Default to a regexp that never matches.
2941 ;; Check that there's no "=" afterwards to avoid matching tokens
2943 (c objc) (concat "\\("
2946 (c-lang-const c-type-decl-prefix-key)
2952 (c-lang-const c-type-decl-prefix-key)
2955 ;; If this matches there's special treatment in
2956 ;; `c-font-lock-declarators' and
2957 ;; `c-font-lock-declarations' that check for a
2958 ;; complete name followed by ":: *".
2959 (c-lang-const c-identifier-start)
2963 pike "\\(\\*\\)\\([^=]\\|$\\)")
2964 (c-lang-defvar c-type-decl-prefix-key (c-lang-const c-type-decl-prefix-key)
2967 (c-lang-defconst c-type-decl-suffix-key
2968 "Regexp matching the declarator operators that might follow after the
2969 identifier in a declaration, e.g. the \"[\" in \"char argv[]\". This
2970 regexp should match \")\" if parentheses are valid in declarators. If
2971 it matches an open paren of some kind, the type declaration check
2972 continues at the corresponding close paren, otherwise the end of the
2973 first submatch is taken as the end of the operator. Identifier syntax
2974 is in effect when this is matched (see `c-identifier-syntax-table')."
2975 ;; Default to a regexp that matches `c-type-modifier-kwds' and a
2976 ;; function argument list parenthesis.
2977 t (if (c-lang-const c-type-modifier-kwds)
2979 (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>"
2982 (c c++ objc) (concat
2985 (if (c-lang-const c-type-modifier-kwds)
2988 ;; "throw" in `c-type-modifier-kwds' is followed
2989 ;; by a parenthesis list, but no extra measures
2990 ;; are necessary to handle that.
2991 (regexp-opt (c-lang-const c-type-modifier-kwds) t)
2997 (c-lang-defvar c-type-decl-suffix-key (c-lang-const c-type-decl-suffix-key)
3000 (c-lang-defconst c-after-suffixed-type-decl-key
3001 "This regexp is matched after a declarator expression where
3002 `c-type-decl-suffix-key' has matched. If it matches then the
3003 construct is taken as a declaration. It's typically used to match the
3004 beginning of a function body or whatever might occur after the
3005 function header in a function declaration or definition. It's
3006 undefined whether identifier syntax (see `c-identifier-syntax-table')
3007 is in effect or not.
3009 Note that it's used in cases like after \"foo (bar)\" so it should
3010 only match when it's certain that it's a declaration, e.g., \"{\" but
3011 not \",\" or \";\"."
3013 ;; If K&R style declarations should be recognized then one could
3014 ;; consider to match the start of any symbol since we want to match
3015 ;; the start of the first declaration in the "K&R region". That
3016 ;; could however produce false matches on code like "FOO(bar) x"
3017 ;; where FOO is a cpp macro, so it's better to leave it out and rely
3018 ;; on the other heuristics in that case.
3019 t (if (c-lang-const c-postfix-spec-kwds)
3020 ;; Add on the keywords in `c-postfix-spec-kwds'.
3021 (concat (c-lang-const c-after-suffixed-type-decl-key)
3023 (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
3024 (c-lang-const c-after-suffixed-type-decl-key))
3025 ;; Also match the colon that starts a base class initializer list in
3026 ;; C++. That can be confused with a function call before the colon
3027 ;; in a ? : operator, but we count on that `c-decl-prefix-re' won't
3028 ;; match before such a thing (as a declaration-level construct;
3029 ;; matches inside arglist contexts are already excluded).
3031 (c-lang-defvar c-after-suffixed-type-decl-key
3032 (c-lang-const c-after-suffixed-type-decl-key)
3035 (c-lang-defconst c-after-suffixed-type-maybe-decl-key
3036 ;; Regexp that in addition to `c-after-suffixed-type-decl-key'
3037 ;; matches ";" and ",".
3038 t (concat "\\(" (c-lang-const c-after-suffixed-type-decl-key) "\\)"
3040 (c-lang-defvar c-after-suffixed-type-maybe-decl-key
3041 (c-lang-const c-after-suffixed-type-maybe-decl-key))
3043 (c-lang-defconst c-opt-type-concat-key
3044 "Regexp matching operators that concatenate types, e.g. the \"|\" in
3045 \"int|string\" in Pike. The end of the first submatch is taken as the
3046 end of the operator. nil in languages without such operators. It's
3047 undefined whether identifier syntax (see `c-identifier-syntax-table')
3048 is in effect or not."
3050 pike "\\([|.&]\\)\\($\\|[^|.&]\\)")
3051 (c-lang-defvar c-opt-type-concat-key (c-lang-const c-opt-type-concat-key)
3054 (c-lang-defconst c-opt-type-suffix-key
3055 "Regexp matching operators that might follow after a type, or nil in
3056 languages that don't have such operators. The end of the first
3057 submatch is taken as the end of the operator. This should not match
3058 things like C++ template arglists if `c-recognize-<>-arglists' is set.
3059 It's undefined whether identifier syntax (see `c-identifier-syntax-table')
3060 is in effect or not."
3062 (c c++ objc pike) "\\(\\.\\.\\.\\)"
3063 java (concat "\\(\\[" (c-lang-const c-simple-ws) "*\\]\\|\\.\\.\\.\\)"))
3064 (c-lang-defvar c-opt-type-suffix-key (c-lang-const c-opt-type-suffix-key))
3066 (c-lang-defvar c-known-type-key
3067 ;; Regexp matching the known type identifiers. This is initialized
3068 ;; from the type keywords and `*-font-lock-extra-types'. The first
3069 ;; submatch is the one that matches the type. Note that this regexp
3070 ;; assumes that symbol constituents like '_' and '$' have word
3073 (when (boundp (c-mode-symbol "font-lock-extra-types"))
3074 (c-mode-var "font-lock-extra-types")))
3076 (delq nil (mapcar (lambda (re)
3077 (when (string-match "[][.*+?^$\\]" re)
3081 (delq nil (mapcar (lambda (re)
3082 (unless (string-match "[][.*+?^$\\]" re)
3087 (append (list (c-make-keywords-re nil
3088 (append (c-lang-const c-primitive-type-kwds)
3094 (c-lang-defconst c-special-brace-lists
3095 "List of open- and close-chars that makes up a pike-style brace list,
3096 i.e., for a ([ ]) list there should be a cons (?\\[ . ?\\]) in this
3099 pike '((?{ . ?}) (?\[ . ?\]) (?< . ?>)))
3100 (c-lang-defvar c-special-brace-lists (c-lang-const c-special-brace-lists))
3102 (c-lang-defconst c-recognize-knr-p
3103 "Non-nil means K&R style argument declarations are valid."
3106 (c-lang-defvar c-recognize-knr-p (c-lang-const c-recognize-knr-p))
3108 (c-lang-defconst c-recognize-typeless-decls
3109 "Non-nil means function declarations without return type should be
3110 recognized. That can introduce an ambiguity with parenthesized macro
3111 calls before a brace block. This setting does not affect declarations
3112 that are preceded by a declaration starting keyword, so
3113 e.g. `c-typeless-decl-kwds' may still be used when it's set to nil."
3115 (c c++ objc java) t)
3116 (c-lang-defvar c-recognize-typeless-decls
3117 (c-lang-const c-recognize-typeless-decls))
3119 (c-lang-defconst c-recognize-<>-arglists
3120 "Non-nil means C++ style template arglists should be handled. More
3121 specifically, this means a comma separated list of types or
3122 expressions surrounded by \"<\" and \">\". It's always preceded by an
3123 identifier or one of the keywords on `c-<>-type-kwds' or
3124 `c-<>-arglist-kwds'. If there's an identifier before then the whole
3125 expression is considered to be a type."
3126 t (or (consp (c-lang-const c-<>-type-kwds))
3127 (consp (c-lang-const c-<>-arglist-kwds)))
3128 java t) ; 2008-10-19. This is crude. The syntax for java
3129 ; generics is not yet coded in CC Mode.
3130 (c-lang-defvar c-recognize-<>-arglists (c-lang-const c-recognize-<>-arglists))
3132 (c-lang-defconst c-<>-notable-chars-re
3133 "A regexp matching any single character notable inside a <...> construct.
3134 This must include \"<\" and \">\", and should include \",\", and
3135 any character which cannot be valid inside such a construct.
3136 This is used in `c-forward-<>-arglist-recur' to try to detect
3137 sequences of tokens which cannot be a template/generic construct.
3138 When \"(\" is present, that defun will attempt to parse a
3139 parenthesized expression inside the template. When \")\" is
3140 present it will treat an unbalanced closing paren as a sign of
3141 the invalidity of the putative template construct."
3144 (c-lang-defvar c-<>-notable-chars-re (c-lang-const c-<>-notable-chars-re))
3146 (c-lang-defconst c-enums-contain-decls
3147 "Non-nil means that an enum structure can contain declarations."
3150 (c-lang-defvar c-enums-contain-decls (c-lang-const c-enums-contain-decls))
3152 (c-lang-defconst c-recognize-paren-inits
3153 "Non-nil means that parenthesis style initializers exist,
3154 i.e. constructs like
3158 in addition to the more classic
3163 (c-lang-defvar c-recognize-paren-inits (c-lang-const c-recognize-paren-inits))
3165 (c-lang-defconst c-recognize-paren-inexpr-blocks
3166 "Non-nil to recognize gcc style in-expression blocks,
3167 i.e. compound statements surrounded by parentheses inside expressions."
3170 (c-lang-defvar c-recognize-paren-inexpr-blocks
3171 (c-lang-const c-recognize-paren-inexpr-blocks))
3173 (c-lang-defconst c-opt-<>-arglist-start
3174 ;; Regexp matching the start of angle bracket arglists in languages
3175 ;; where `c-recognize-<>-arglists' is set. Does not exclude
3176 ;; keywords outside `c-<>-arglist-kwds'. The first submatch is
3177 ;; assumed to surround the preceding symbol. The whole match is
3178 ;; assumed to end directly after the opening "<".
3179 t (if (c-lang-const c-recognize-<>-arglists)
3181 (c-lang-const c-symbol-key)
3183 (c-lang-const c-syntactic-ws)
3185 (c-lang-defvar c-opt-<>-arglist-start (c-lang-const c-opt-<>-arglist-start))
3187 (c-lang-defconst c-opt-<>-arglist-start-in-paren
3188 ;; Regexp that in addition to `c-opt-<>-arglist-start' matches close
3189 ;; parens. The first submatch is assumed to surround
3190 ;; `c-opt-<>-arglist-start'.
3191 t (if (c-lang-const c-opt-<>-arglist-start)
3193 (c-lang-const c-opt-<>-arglist-start)
3195 (c-lang-defvar c-opt-<>-arglist-start-in-paren
3196 (c-lang-const c-opt-<>-arglist-start-in-paren))
3198 (c-lang-defconst c-opt-postfix-decl-spec-key
3199 ;; Regexp matching the beginning of a declaration specifier in the
3200 ;; region between the header and the body of a declaration.
3202 ;; TODO: This is currently not used uniformly; c++-mode and
3203 ;; java-mode each have their own ways of using it.
3206 (c-lang-const c-simple-ws) "*"
3207 "\\(virtual" (c-lang-const c-simple-ws) "+\\)?\\("
3208 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
3209 "\\)" (c-lang-const c-simple-ws) "+"
3210 "\\(" (c-lang-const c-symbol-key) "\\)")
3211 java (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
3212 (c-lang-defvar c-opt-postfix-decl-spec-key
3213 (c-lang-const c-opt-postfix-decl-spec-key))
3215 (c-lang-defconst c-recognize-colon-labels
3216 "Non-nil if generic labels ending with \":\" should be recognized.
3217 That includes labels in code and access keys in classes. This does
3218 not apply to labels recognized by `c-label-kwds' and
3219 `c-opt-extra-label-key'."
3221 (c c++ objc java pike) t)
3222 (c-lang-defvar c-recognize-colon-labels
3223 (c-lang-const c-recognize-colon-labels))
3225 (c-lang-defconst c-label-prefix-re
3226 "Regexp like `c-decl-prefix-re' that matches any token that can precede
3227 a generic colon label. Not used if `c-recognize-colon-labels' is
3230 (c-lang-defvar c-label-prefix-re
3231 (c-lang-const c-label-prefix-re))
3233 (c-lang-defconst c-nonlabel-token-key
3234 "Regexp matching things that can't occur in generic colon labels,
3235 neither in a statement nor in a declaration context. The regexp is
3236 tested at the beginning of every sexp in a suspected label,
3237 i.e. before \":\". Only used if `c-recognize-colon-labels' is set."
3239 ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
3240 (c-make-keywords-re t
3241 (c--set-difference (c-lang-const c-keywords)
3242 (append (c-lang-const c-label-kwds)
3243 (c-lang-const c-protection-kwds))
3244 :test 'string-equal)))
3245 ;; Don't allow string literals, except in AWK. Character constants are OK.
3246 (c objc java pike idl) (concat "\"\\|"
3247 (c-lang-const c-nonlabel-token-key))
3248 ;; Also check for open parens in C++, to catch member init lists in
3249 ;; constructors. We normally allow it so that macros with arguments
3251 c++ (concat "\\s(\\|\"\\|" (c-lang-const c-nonlabel-token-key)))
3252 (c-lang-defvar c-nonlabel-token-key (c-lang-const c-nonlabel-token-key))
3254 (c-lang-defconst c-nonlabel-token-2-key
3255 "Regexp matching things that can't occur two symbols before a colon in
3256 a label construct. This catches C++'s inheritance construct \"class foo
3257 : bar\". Only used if `c-recognize-colon-labels' is set."
3258 t "\\<\\>" ; matches nothing
3259 c++ (c-make-keywords-re t '("class")))
3260 (c-lang-defvar c-nonlabel-token-2-key (c-lang-const c-nonlabel-token-2-key))
3262 (c-lang-defconst c-opt-extra-label-key
3263 "Optional regexp matching labels.
3264 Normally, labels are detected according to `c-nonlabel-token-key',
3265 `c-decl-prefix-re' and `c-nonlabel-decl-prefix-re'. This regexp can
3266 be used if there are additional labels that aren't recognized that
3269 objc (c-make-keywords-re t (c-lang-const c-protection-kwds)))
3270 (c-lang-defvar c-opt-extra-label-key (c-lang-const c-opt-extra-label-key))
3272 (c-lang-defconst c-opt-friend-key
3273 ;; Regexp describing friend declarations classes, or nil in
3274 ;; languages that don't have such things.
3276 ;; TODO: Ought to use `c-prefix-spec-kwds-re' or similar, and the
3277 ;; template skipping isn't done properly. This will disappear soon.
3279 c++ (concat "friend" (c-lang-const c-simple-ws) "+"
3282 (c-lang-const c-simple-ws) "*"
3284 (c-lang-const c-simple-ws) "*"
3286 (c-lang-const c-simple-ws) "+")))
3287 (c-lang-defvar c-opt-friend-key (c-lang-const c-opt-friend-key))
3289 (c-lang-defconst c-opt-method-key
3290 ;; Special regexp to match the start of Objective-C methods. The
3291 ;; first submatch is assumed to end after the + or - key.
3294 ;; TODO: Ought to use a better method than anchoring on bol.
3297 (c-lang-const c-simple-ws) "*"
3298 (concat "\\(" ; Return type.
3300 (c-lang-const c-simple-ws) "*"
3302 "\\(" (c-lang-const c-symbol-key) "\\)"))
3303 (c-lang-defvar c-opt-method-key (c-lang-const c-opt-method-key))
3305 (c-lang-defconst c-type-decl-end-used
3306 ;; Must be set in buffers where the `c-type' text property might be
3307 ;; used with the value `c-decl-end'.
3309 ;; `c-decl-end' is used to mark the ends of labels and access keys
3310 ;; to make interactive refontification work better.
3311 t (or (c-lang-const c-recognize-colon-labels)
3312 (and (c-lang-const c-label-kwds) t))
3313 ;; `c-decl-end' is used to mark the end of the @-style directives in
3316 (c-lang-defvar c-type-decl-end-used (c-lang-const c-type-decl-end-used))
3318 (c-lang-defconst c-maybe-decl-faces
3319 "List of faces that might be put at the start of a type when
3320 `c-font-lock-declarations' runs. This must be evaluated (with `eval') at
3321 runtime to get the actual list of faces. This ensures that face name
3322 aliases in Emacs are resolved."
3325 c-reference-face-name
3326 font-lock-keyword-face)
3327 java (append (c-lang-const c-maybe-decl-faces)
3328 '(font-lock-preprocessor-face)))
3329 (c-lang-defvar c-maybe-decl-faces (c-lang-const c-maybe-decl-faces))
3332 ;;; Wrap up the `c-lang-defvar' system.
3334 ;; Compile in the list of language variables that has been collected
3335 ;; with the `c-lang-defvar' and `c-lang-setvar' macros. Note that the
3336 ;; first element of each is nil.
3337 (defconst c-lang-variable-inits (cc-eval-when-compile c-lang-variable-inits))
3338 (defconst c-emacs-variable-inits (cc-eval-when-compile c-emacs-variable-inits))
3340 ;; Make the `c-lang-setvar' variables buffer local in the current buffer.
3341 ;; These are typically standard emacs variables such as `comment-start'.
3342 (defmacro c-make-emacs-variables-local ()
3344 ,@(mapcar (lambda (init)
3345 `(make-local-variable ',(car init)))
3346 (cdr c-emacs-variable-inits))))
3348 (defun c-make-init-lang-vars-fun (mode)
3349 "Create a function that initializes all the language dependent variables
3352 This function should be evaluated at compile time, so that the
3353 function it returns is byte compiled with all the evaluated results
3354 from the language constants. Use the `c-init-language-vars' macro to
3355 accomplish that conveniently."
3357 (if (cc-bytecomp-is-compiling)
3358 ;; No need to byte compile this lambda since the byte compiler is
3359 ;; smart enough to detect the `funcall' construct in the
3360 ;; `c-init-language-vars' macro below and compile it all straight
3361 ;; into the function that contains `c-init-language-vars'.
3364 ;; This let sets up the context for `c-mode-var' and similar
3365 ;; that could be in the result from `c--macroexpand-all'.
3366 (let ((c-buffer-is-cc-mode ',mode)
3367 current-var source-eval)
3368 (c-make-emacs-variables-local)
3371 (if (eq c-version-sym ',c-version-sym)
3372 (setq ,@(let ((c-buffer-is-cc-mode mode)
3373 (c-lang-const-expansion 'immediate))
3374 ;; `c-lang-const' will expand to the evaluated
3375 ;; constant immediately in `c--macroexpand-all'
3379 `(current-var ',(car init)
3380 ,(car init) ,(c--macroexpand-all
3382 ;; Note: The following `append' copies the
3383 ;; first argument. That list is small, so
3384 ;; this doesn't matter too much.
3385 (append (cdr c-emacs-variable-inits)
3386 (cdr c-lang-variable-inits)))))
3388 ;; This diagnostic message isn't useful for end
3389 ;; users, so it's disabled.
3390 ;;(unless (get ',mode 'c-has-warned-lang-consts)
3391 ;; (message ,(concat "%s compiled with CC Mode %s "
3392 ;; "but loaded with %s - evaluating "
3393 ;; "language constants from source")
3394 ;; ',mode ,c-version c-version)
3395 ;; (put ',mode 'c-has-warned-lang-consts t))
3397 (setq source-eval t)
3398 (let ((init ',(append (cdr c-emacs-variable-inits)
3399 (cdr c-lang-variable-inits))))
3400 (dolist (var-init init)
3401 (setq current-var (car var-init))
3402 (set (car var-init) (eval (cadr var-init))))))
3406 (message "Eval error in the `c-lang-defvar' or `c-lang-setvar' for `%s'%s: %S"
3410 (fallback source eval - %s compiled with CC Mode %s but loaded with %s)"
3411 ',mode ,c-version c-version)
3414 (signal (car err) (cdr err)))))))
3416 ;; Being evaluated from source. Always use the dynamic method to
3417 ;; work well when `c-lang-defvar's in this file are reevaluated
3421 (let ((c-buffer-is-cc-mode ',mode)
3422 (init (append (cdr c-emacs-variable-inits)
3423 (cdr c-lang-variable-inits)))
3425 (c-make-emacs-variables-local)
3428 (dolist (var-init init)
3429 (setq current-var (car var-init))
3430 (set (car var-init) (eval (cadr var-init))))
3435 "Eval error in the `c-lang-defvar' or `c-lang-setver' for `%s' (source eval): %S"
3437 (signal (car err) (cdr err)))))))
3440 (defmacro c-init-language-vars (mode)
3441 "Initialize all the language dependent variables for the given mode.
3442 This macro is expanded at compile time to a form tailored for the mode
3443 in question, so MODE must be a constant. Therefore MODE is not
3444 evaluated and should not be quoted."
3445 `(funcall ,(c-make-init-lang-vars-fun mode)))
3448 (cc-provide 'cc-langs)
3451 ;; indent-tabs-mode: t
3454 ;;; cc-langs.el ends here