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 c-invalidate-macro-cache)
480 ;; java 'c-before-change-check-<>-operators
481 awk 'c-awk-record-region-clear-NL)
482 (c-lang-defvar c-get-state-before-change-functions
483 (let ((fs (c-lang-const c-get-state-before-change-functions)))
487 "If non-nil, a list of functions called from c-before-change-hook.
488 Typically these will record enough state to allow
489 `c-before-font-lock-function' to extend the region to fontify,
490 and may do such things as removing text-properties which must be
493 These functions will be run in the order given. Each of them
494 takes 2 parameters, the BEG and END supplied to every
495 before-change function; on entry, the buffer will have been
496 widened and match-data will have been saved; point is undefined
497 on both entry and exit; the return value is ignored.
499 The functions are called even when font locking isn't enabled.
501 When the mode is initialized, the functions are called with
502 parameters \(point-min) and \(point-max).")
504 (c-lang-defconst c-before-font-lock-functions
505 ;; For documentation see the following c-lang-defvar of the same name.
506 ;; The value here may be a list of functions or a single function.
507 t 'c-change-expand-fl-region
508 (c objc) '(c-neutralize-syntax-in-and-mark-CPP
509 c-change-expand-fl-region)
510 c++ '(c-neutralize-syntax-in-and-mark-CPP
511 c-restore-<>-properties
512 c-change-expand-fl-region)
513 java '(c-restore-<>-properties
514 c-change-expand-fl-region)
515 awk 'c-awk-extend-and-syntax-tablify-region)
516 (c-lang-defvar c-before-font-lock-functions
517 (let ((fs (c-lang-const c-before-font-lock-functions)))
521 "If non-nil, a list of functions called just before font locking.
522 Typically they will extend the region about to be fontified \(see
523 below) and will set `syntax-table' text properties on the region.
525 These functions will be run in the order given. Each of them
526 takes 3 parameters, the BEG, END, and OLD-LEN supplied to every
527 after-change function; point is undefined on both entry and exit;
528 on entry, the buffer will have been widened and match-data will
529 have been saved; the return value is ignored.
531 The functions may extend the region to be fontified by setting the
532 buffer local variables c-new-BEG and c-new-END.
534 The functions are called even when font locking is disabled.
536 When the mode is initialized, these functions are called with
537 parameters \(point-min), \(point-max) and <buffer size>.")
539 (c-lang-defconst c-before-context-fontification-functions
540 t 'c-context-expand-fl-region
542 ;; For documentation see the following c-lang-defvar of the same name.
543 ;; The value here may be a list of functions or a single function.
544 (c-lang-defvar c-before-context-fontification-functions
545 (let ((fs (c-lang-const c-before-context-fontification-functions)))
549 "If non-nil, a list of functions called just before context (or
550 other non-change) fontification is done. Typically they will
553 These functions will be run in the order given. Each of them
554 takes 2 parameters, the BEG and END of the region to be
555 fontified. Point is undefined on both entry and exit. On entry,
556 the buffer will have been widened and match-data will have been
557 saved; the return value is a cons of the adjusted
558 region, (NEW-BEG . NEW-END).")
561 ;;; Syntactic analysis ("virtual semicolons") for line-oriented languages (AWK).
562 (c-lang-defconst c-at-vsemi-p-fn
563 "Contains a function \"Is there a virtual semicolon at POS or point?\".
564 Such a function takes one optional parameter, a buffer position (defaults to
565 point), and returns nil or t. This variable contains nil for languages which
566 don't have EOL terminated statements. "
568 (c c++ objc) 'c-at-macro-vsemi-p
569 awk 'c-awk-at-vsemi-p)
570 (c-lang-defvar c-at-vsemi-p-fn (c-lang-const c-at-vsemi-p-fn))
572 (c-lang-defconst c-vsemi-status-unknown-p-fn
573 "Contains a function \"are we unsure whether there is a virtual semicolon on this line?\".
574 The (admittedly kludgy) purpose of such a function is to prevent an infinite
575 recursion in c-beginning-of-statement-1 when point starts at a `while' token.
576 The function MUST NOT UNDER ANY CIRCUMSTANCES call c-beginning-of-statement-1,
577 even indirectly. This variable contains nil for languages which don't have
578 EOL terminated statements."
580 (c c++ objc) 'c-macro-vsemi-status-unknown-p
581 awk 'c-awk-vsemi-status-unknown-p)
582 (c-lang-defvar c-vsemi-status-unknown-p-fn
583 (c-lang-const c-vsemi-status-unknown-p-fn))
586 ;;; Lexer-level syntax (identifiers, tokens etc).
588 (c-lang-defconst c-has-bitfields
589 "Whether the language has bitfield declarations."
592 (c-lang-defvar c-has-bitfields (c-lang-const c-has-bitfields))
594 (c-lang-defconst c-modified-constant
595 "Regexp that matches a “modified” constant literal such as \"L\\='a\\='\",
596 a “long character”. In particular, this recognizes forms of constant
597 which `c-backward-sexp' needs to be called twice to move backwards over."
599 (c c++ objc) "L'\\([^\\'\t\f\n\r]\\|\\\\.\\)'")
600 ;; FIXME!!! Extend this to cover strings, if needed. 2008-04-11
601 (c-lang-defvar c-modified-constant (c-lang-const c-modified-constant))
603 (c-lang-defconst c-symbol-start
604 "Regexp that matches the start of a symbol, i.e. any identifier or
605 keyword. It's unspecified how far it matches. Does not contain a \\|
606 operator at the top level."
607 t (concat "[" c-alpha "_]")
608 java (concat "[" c-alpha "_@]")
609 objc (concat "[" c-alpha "_@]")
610 pike (concat "[" c-alpha "_`]"))
611 (c-lang-defvar c-symbol-start (c-lang-const c-symbol-start))
613 (c-lang-defconst c-symbol-chars
614 "Set of characters that can be part of a symbol.
615 This is of the form that fits inside [ ] in a regexp."
616 ;; Pike note: With the backquote identifiers this would include most
617 ;; operator chars too, but they are handled with other means instead.
618 t (concat c-alnum "_$")
619 objc (concat c-alnum "_$@"))
620 (c-lang-defvar c-symbol-chars (c-lang-const c-symbol-chars))
622 (c-lang-defconst c-symbol-char-key
623 "Regexp matching a sequence of at least one identifier character."
624 t (concat "[" (c-lang-const c-symbol-chars) "]+"))
625 (c-lang-defvar c-symbol-char-key (c-lang-const c-symbol-char-key))
627 (c-lang-defconst c-symbol-key
628 "Regexp matching identifiers and keywords (with submatch 0). Assumed
629 to match if `c-symbol-start' matches on the same position."
630 t (concat (c-lang-const c-symbol-start)
631 "[" (c-lang-const c-symbol-chars) "]*")
633 ;; Use the value from C here since the operator backquote is
634 ;; covered by the other alternative.
635 (c-lang-const c-symbol-key c)
637 (c-make-keywords-re nil
638 (c-lang-const c-overloadable-operators))))
639 (c-lang-defvar c-symbol-key (c-lang-const c-symbol-key))
641 (c-lang-defconst c-symbol-key-depth
642 ;; Number of regexp grouping parens in `c-symbol-key'.
643 t (regexp-opt-depth (c-lang-const c-symbol-key)))
645 (c-lang-defconst c-nonsymbol-chars
646 "This is the set of chars that can't be part of a symbol, i.e. the
647 negation of `c-symbol-chars'."
648 t (concat "^" (c-lang-const c-symbol-chars)))
649 (c-lang-defvar c-nonsymbol-chars (c-lang-const c-nonsymbol-chars))
651 (c-lang-defconst c-nonsymbol-key
652 "Regexp that matches any character that can't be part of a symbol.
653 It's usually appended to other regexps to avoid matching a prefix.
654 It's assumed to not contain any submatchers."
655 ;; The same thing regarding Unicode identifiers applies here as to
657 t (concat "[" (c-lang-const c-nonsymbol-chars) "]"))
659 (c-lang-defconst c-identifier-ops
660 "The operators that make up fully qualified identifiers. nil in
661 languages that don't have such things. See `c-operators' for a
662 description of the format. Binary operators can concatenate symbols,
663 e.g. \"::\" in \"A::B::C\". Prefix operators can precede identifiers,
664 e.g. \"~\" in \"~A::B\". Other types of operators aren't supported.
666 This value is by default merged into `c-operators'."
668 c++ '((prefix "~" "??-" "compl")
671 ;; Java has "." to concatenate identifiers but it's also used for
672 ;; normal indexing. There's special code in the Java font lock
673 ;; rules to fontify qualified identifiers based on the standard
674 ;; naming conventions. We still define "." here to make
675 ;; `c-forward-name' move over as long names as possible which is
676 ;; necessary to e.g. handle throws clauses correctly.
677 java '((left-assoc "."))
678 idl '((left-assoc "::")
680 pike '((left-assoc "::")
684 (c-lang-defconst c-opt-identifier-concat-key
685 ;; Appendable adorned regexp matching the operators that join
686 ;; symbols to fully qualified identifiers, or nil in languages that
687 ;; don't have such things.
689 ;; This was a docstring constant in 5.30. It still works but is now
690 ;; considered internal - change `c-identifier-ops' instead.
691 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
692 '(left-assoc right-assoc)
695 (c-make-keywords-re 'appendable ops))))
696 (c-lang-defvar c-opt-identifier-concat-key
697 (c-lang-const c-opt-identifier-concat-key)
700 (c-lang-defconst c-opt-identifier-concat-key-depth
701 ;; Number of regexp grouping parens in `c-opt-identifier-concat-key'.
702 t (regexp-opt-depth (c-lang-const c-opt-identifier-concat-key)))
704 (c-lang-defconst c-opt-identifier-prefix-key
705 ;; Appendable adorned regexp matching operators that might precede
706 ;; an identifier and that are part of the identifier in that case.
707 ;; nil in languages without such things.
708 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
712 (c-make-keywords-re 'appendable ops))))
714 (c-lang-defconst c-after-id-concat-ops
715 "Operators that can occur after a binary operator on `c-identifier-ops'
716 in identifiers. nil in languages that don't have such things.
718 Operators here should also have appropriate entries in `c-operators' -
719 it's not taken care of by default."
721 ;; '~' for destructors in C++, '*' for member pointers.
723 ;; In Java we recognize '*' to deal with "foo.bar.*" that can occur
724 ;; in import declarations. (This will also match bogus things like
725 ;; "foo.*bar" but we don't bother.)
728 (c-lang-defconst c-opt-after-id-concat-key
729 ;; Regexp that must match the token after
730 ;; `c-opt-identifier-concat-key' for it to be considered an
731 ;; identifier concatenation operator (which e.g. causes the
732 ;; preceding identifier to be fontified as a reference). Assumed to
733 ;; be a string if `c-opt-identifier-concat-key' is.
735 ;; This was a docstring constant in 5.30. It still works but is now
736 ;; considered internal - change `c-after-id-concat-ops' instead.
737 t (concat (c-lang-const c-symbol-start)
738 (if (c-lang-const c-after-id-concat-ops)
739 (concat "\\|" (c-make-keywords-re 'appendable
740 (c-lang-const c-after-id-concat-ops)))
743 (c-lang-defconst c-identifier-start
744 "Regexp that matches the start of an (optionally qualified) identifier.
745 It should also match all keywords. It's unspecified how far it
747 t (concat (c-lang-const c-symbol-start)
748 (if (c-lang-const c-opt-identifier-prefix-key)
750 (c-lang-const c-opt-identifier-prefix-key))
752 (c-lang-defvar c-identifier-start (c-lang-const c-identifier-start))
754 (c-lang-defconst c-identifier-key
755 "Regexp matching a fully qualified identifier, like \"A::B::c\" in
756 C++. It does not recognize the full range of syntactic whitespace
757 between the tokens; `c-forward-name' has to be used for that. It
758 should also not match identifiers containing parenthesis groupings,
759 e.g. identifiers with template arguments such as \"A<X,Y>\" in C++."
760 ;; This regexp is more complex than strictly necessary to ensure
761 ;; that it can be matched with a minimum of backtracking.
762 t (concat (if (c-lang-const c-opt-identifier-prefix-key)
765 (c-lang-const c-opt-identifier-prefix-key)
766 (c-lang-const c-simple-ws) "*"
769 "\\(" (c-lang-const c-symbol-key) "\\)"
770 (if (c-lang-const c-opt-identifier-concat-key)
773 (c-lang-const c-simple-ws) "*"
774 (c-lang-const c-opt-identifier-concat-key)
775 (c-lang-const c-simple-ws) "*"
776 (if (c-lang-const c-after-id-concat-ops)
779 (c-make-keywords-re 'appendable
780 (c-lang-const c-after-id-concat-ops))
782 ;; For flexibility, consider the symbol match
783 ;; optional if we've hit a
784 ;; `c-after-id-concat-ops' operator. This is
785 ;; also necessary to handle the "*" that can
786 ;; end import declaration identifiers in Java.
788 (c-lang-const c-simple-ws) "*"
789 "\\(" (c-lang-const c-symbol-key) "\\)"
792 "\\(" (c-lang-const c-symbol-key) "\\)"
794 (concat "\\(" (c-lang-const c-symbol-key) "\\)"))
797 (c-lang-defvar c-identifier-key (c-lang-const c-identifier-key))
799 (c-lang-defconst c-identifier-last-sym-match
800 ;; This was a docstring constant in 5.30 but it's no longer used.
801 ;; It's only kept to avoid breaking third party code.
803 ;; Used to identify the submatch in `c-identifier-key' that
804 ;; surrounds the last symbol in the qualified identifier. It's a
805 ;; list of submatch numbers, of which the first that has a match is
806 ;; taken. It's assumed that at least one does when the regexp has
810 (c-lang-defconst c-string-escaped-newlines
811 "Set if the language support backslash escaped newlines inside string
815 (c-lang-defvar c-string-escaped-newlines
816 (c-lang-const c-string-escaped-newlines))
818 (c-lang-defconst c-multiline-string-start-char
819 "Set if the language supports multiline string literals without escaped
820 newlines. If t, all string literals are multiline. If a character,
821 only literals where the open quote is immediately preceded by that
822 literal are multiline."
825 (c-lang-defvar c-multiline-string-start-char
826 (c-lang-const c-multiline-string-start-char))
828 (c-lang-defconst c-opt-cpp-symbol
829 "The symbol which starts preprocessor constructs when in the margin."
832 (c-lang-defvar c-opt-cpp-symbol (c-lang-const c-opt-cpp-symbol))
834 (c-lang-defconst c-opt-cpp-prefix
835 "Regexp matching the prefix of a cpp directive in the languages that
836 normally use that macro preprocessor. Tested at bol or at boi.
837 Assumed to not contain any submatches or \\| operators."
838 ;; TODO (ACM, 2005-04-01). Amend the following to recognize escaped NLs;
839 ;; amend all uses of c-opt-cpp-prefix which count regexp-depth.
842 (c-lang-defvar c-opt-cpp-prefix (c-lang-const c-opt-cpp-prefix))
844 (c-lang-defconst c-anchored-cpp-prefix
845 "Regexp matching the prefix of a cpp directive anchored to BOL,
846 in the languages that have a macro preprocessor."
847 t "^\\s *\\(#\\)\\s *"
849 (c-lang-defvar c-anchored-cpp-prefix (c-lang-const c-anchored-cpp-prefix))
851 (c-lang-defconst c-opt-cpp-start
852 "Regexp matching the prefix of a cpp directive including the directive
853 name, or nil in languages without preprocessor support. The first
854 submatch surrounds the directive name."
855 t (if (c-lang-const c-opt-cpp-prefix)
856 (concat (c-lang-const c-opt-cpp-prefix)
857 "\\([" c-alnum "]+\\)"))
858 ;; Pike, being a scripting language, recognizes hash-bangs too.
859 pike (concat (c-lang-const c-opt-cpp-prefix)
860 "\\([" c-alnum "]+\\|!\\)"))
861 (c-lang-defvar c-opt-cpp-start (c-lang-const c-opt-cpp-start))
863 (c-lang-defconst c-cpp-message-directives
864 "List of cpp directives (without the prefix) that are followed by a
866 t (if (c-lang-const c-opt-cpp-prefix)
868 (c c++ objc pike) '("error" "warning"))
870 (c-lang-defconst c-cpp-include-directives
871 "List of cpp directives (without the prefix) that are followed by a
872 file name in angle brackets or quotes."
873 t (if (c-lang-const c-opt-cpp-prefix)
875 objc '("include" "import"))
877 (c-lang-defconst c-opt-cpp-macro-define
878 "Cpp directive (without the prefix) that is followed by a macro
879 definition, or nil if the language doesn't have any."
880 t (if (c-lang-const c-opt-cpp-prefix)
882 (c-lang-defvar c-opt-cpp-macro-define
883 (c-lang-const c-opt-cpp-macro-define))
885 (c-lang-defconst c-opt-cpp-macro-define-start
886 ;; Regexp matching everything up to the macro body of a cpp define, or the
887 ;; end of the logical line if there is none. Submatch 1 is the name of the
888 ;; macro. Set if c-opt-cpp-macro-define is.
889 t (if (c-lang-const c-opt-cpp-macro-define)
890 (concat (c-lang-const c-opt-cpp-prefix)
891 (c-lang-const c-opt-cpp-macro-define)
892 "[ \t]+\\(\\(\\sw\\|_\\)+\\)\\(([^)]*)\\)?"
894 "\\([ \t]\\|\\\\\n\\)*")))
895 (c-lang-defvar c-opt-cpp-macro-define-start
896 (c-lang-const c-opt-cpp-macro-define-start))
898 (c-lang-defconst c-opt-cpp-macro-define-id
899 ;; Regexp matching everything up to the end of the identifier defined
901 t (if (c-lang-const c-opt-cpp-macro-define)
902 (concat (c-lang-const c-opt-cpp-prefix) ; #
903 (c-lang-const c-opt-cpp-macro-define) ; define
904 "[ \t]+\\(\\sw\\|_\\)+")))
905 (c-lang-defvar c-opt-cpp-macro-define-id
906 (c-lang-const c-opt-cpp-macro-define-id))
908 (c-lang-defconst c-cpp-expr-directives
909 "List of cpp directives (without the prefix) that are followed by an
911 t (if (c-lang-const c-opt-cpp-prefix)
914 (c-lang-defconst c-cpp-expr-intro-re
915 "Regexp which matches the start of a CPP directive which contains an
916 expression, or nil if there aren't any in the language."
917 t (if (c-lang-const c-cpp-expr-directives)
919 (c-lang-const c-opt-cpp-prefix)
920 (c-make-keywords-re t (c-lang-const c-cpp-expr-directives)))))
921 (c-lang-defvar c-cpp-expr-intro-re
922 (c-lang-const c-cpp-expr-intro-re))
924 (c-lang-defconst c-cpp-expr-functions
925 "List of functions in cpp expressions."
926 t (if (c-lang-const c-opt-cpp-prefix)
928 pike '("defined" "efun" "constant"))
930 (c-lang-defconst c-assignment-operators
931 "List of all assignment operators."
932 t '("=" "*=" "/=" "%=" "+=" "-=" ">>=" "<<=" "&=" "^=" "|=")
933 java (append (c-lang-const c-assignment-operators)
935 c++ (append (c-lang-const c-assignment-operators)
936 '("and_eq" "or_eq" "xor_eq" "??!=" "??'="))
939 (c-lang-defconst c-operators
940 "List describing all operators, along with their precedence and
941 associativity. The order in the list corresponds to the precedence of
942 the operators: The operators in each element are a group with the same
943 precedence, and the group has higher precedence than the groups in all
944 following elements. The car of each element describes the type of the
945 operator group, and the cdr is a list of the operator tokens in it.
946 The operator group types are:
948 `prefix' Unary prefix operators.
949 `postfix' Unary postfix operators.
951 Unary postfix operators if and only if the chars have
953 `left-assoc' Binary left associative operators (i.e. a+b+c means (a+b)+c).
954 `right-assoc' Binary right associative operators (i.e. a=b=c means a=(b=c)).
955 `right-assoc-sequence'
956 Right associative operator that constitutes of a
957 sequence of tokens that separate expressions. All the
958 tokens in the group are in this case taken as
959 describing the sequence in one such operator, and the
960 order between them is therefore significant.
962 Operators containing a character with paren syntax are taken to match
963 with a corresponding open/close paren somewhere else. A postfix
964 operator with close paren syntax is taken to end a postfix expression
965 started somewhere earlier, rather than start a new one at point. Vice
966 versa for prefix operators with open paren syntax.
968 Note that operators like \".\" and \"->\" which in language references
969 often are described as postfix operators are considered binary here,
970 since CC Mode treats every identifier as an expression."
972 ;; There's currently no code in CC Mode that exploits all the info
973 ;; in this variable; precedence, associativity etc are present as a
974 ;; preparation for future work.
976 ;; FIXME!!! C++11's "auto" operators "=" and "->" need to go in here
977 ;; somewhere. 2012-03-24.
980 ,@(when (c-lang-const c-opt-cpp-prefix)
982 ,@(when (c-major-mode-is '(c-mode c++-mode))
985 ,@(when (c-major-mode-is '(c-mode c++-mode))
986 '("%:%:" "??=??=")))))
989 ,@(c-lang-const c-identifier-ops)
990 ,@(cond ((or (c-major-mode-is 'c++-mode) (c-major-mode-is 'java-mode))
991 `((postfix-if-paren "<" ">"))) ; Templates.
992 ((c-major-mode-is 'pike-mode)
993 `((prefix "global" "predef")))
994 ((c-major-mode-is 'java-mode)
995 `((prefix "super"))))
998 ,@(when (c-major-mode-is 'c++-mode)
999 ;; The following need special treatment.
1000 `((prefix "dynamic_cast" "static_cast"
1001 "reinterpret_cast" "const_cast" "typeid"
1004 ,@(unless (c-major-mode-is 'java-mode)
1006 (postfix "++" "--" "[" "]" "(" ")"
1007 ,@(when (c-major-mode-is '(c-mode c++-mode))
1008 '("<:" ":>" "??(" "??)")))
1011 (prefix "++" "--" "+" "-" "!" "~"
1012 ,@(when (c-major-mode-is 'c++-mode) '("not" "compl"))
1013 ,@(when (c-major-mode-is '(c-mode c++-mode))
1014 '("*" "&" "sizeof" "??-"))
1015 ,@(when (c-major-mode-is 'objc-mode)
1016 '("@selector" "@protocol" "@encode"))
1017 ;; The following need special treatment.
1018 ,@(cond ((c-major-mode-is 'c++-mode)
1020 ((c-major-mode-is 'java-mode)
1022 ((c-major-mode-is 'pike-mode)
1023 '("class" "lambda" "catch" "throw" "gauge")))
1025 ,@(when (c-major-mode-is 'pike-mode)
1026 '("[" "]"))) ; Type cast.
1028 ;; Member selection.
1029 ,@(when (c-major-mode-is 'c++-mode)
1030 `((left-assoc ".*" "->*")))
1033 (left-assoc "*" "/" "%")
1036 (left-assoc "+" "-")
1039 (left-assoc "<<" ">>"
1040 ,@(when (c-major-mode-is 'java-mode)
1044 (left-assoc "<" ">" "<=" ">="
1045 ,@(when (c-major-mode-is 'java-mode)
1049 (left-assoc "==" "!="
1050 ,@(when (c-major-mode-is 'c++-mode) '("not_eq")))
1054 ,@(when (c-major-mode-is 'c++-mode) '("bitand")))
1056 ;; Bitwise exclusive or.
1058 ,@(when (c-major-mode-is '(c-mode c++-mode))
1060 ,@(when (c-major-mode-is 'c++-mode) '("xor")))
1064 ,@(when (c-major-mode-is '(c-mode c++-mode))
1066 ,@(when (c-major-mode-is 'c++-mode) '("bitor")))
1070 ,@(when (c-major-mode-is 'c++-mode) '("and")))
1074 ,@(when (c-major-mode-is '(c-mode c++-mode))
1076 ,@(when (c-major-mode-is 'c++-mode) '("or")))
1079 (right-assoc-sequence "?" ":")
1082 (right-assoc ,@(c-lang-const c-assignment-operators))
1085 ,@(when (c-major-mode-is 'c++-mode)
1086 '((prefix "throw")))
1091 ;; IDL got its own definition since it has a much smaller operator
1092 ;; set than the other languages.
1093 idl `(;; Preprocessor.
1097 ,@(c-lang-const c-identifier-ops)
1099 (prefix "+" "-" "~")
1101 (left-assoc "*" "/" "%")
1103 (left-assoc "+" "-")
1105 (left-assoc "<<" ">>")
1113 (c-lang-defconst c-operator-list
1114 ;; The operators as a flat list (without duplicates).
1115 t (c-filter-ops (c-lang-const c-operators) t t))
1117 (c-lang-defconst c-overloadable-operators
1118 "List of the operators that are overloadable, in their \"identifier
1119 form\". See also `c-op-identifier-prefix'."
1121 c++ '("new" "delete" ;; Can be followed by "[]" but we ignore that.
1123 "^" "??'" "xor" "&" "bitand" "|" "??!" "bitor" "~" "??-" "compl"
1124 "!" "=" "<" ">" "+=" "-=" "*=" "/=" "%=" "^="
1125 "??'=" "xor_eq" "&=" "and_eq" "|=" "??!=" "or_eq"
1126 "<<" ">>" ">>=" "<<=" "==" "!=" "not_eq" "<=" ">="
1127 "&&" "and" "||" "??!??!" "or" "++" "--" "," "->*" "->"
1128 "()" "[]" "<::>" "??(??)")
1129 ;; These work like identifiers in Pike.
1130 pike '("`+" "`-" "`&" "`|" "`^" "`<<" "`>>" "`*" "`/" "`%" "`~"
1131 "`==" "`<" "`>" "`!" "`[]" "`[]=" "`->" "`->=" "`()" "``+"
1132 "``-" "``&" "``|" "``^" "``<<" "``>>" "``*" "``/" "``%"
1135 (c-lang-defconst c-overloadable-operators-regexp
1136 ;; Regexp tested after an "operator" token in C++.
1138 c++ (c-make-keywords-re nil (c-lang-const c-overloadable-operators)))
1139 (c-lang-defvar c-overloadable-operators-regexp
1140 (c-lang-const c-overloadable-operators-regexp))
1142 (c-lang-defconst c-opt-op-identifier-prefix
1143 "Regexp matching the token before the ones in
1144 `c-overloadable-operators' when operators are specified in their
1145 \"identifier form\". This typically matches \"operator\" in C++ where
1146 operator functions are specified as e.g. \"operator +\". It's nil in
1147 languages without operator functions or where the complete operator
1148 identifier is listed in `c-overloadable-operators'.
1150 This regexp is assumed to not match any non-operator identifier."
1152 c++ (c-make-keywords-re t '("operator")))
1153 (c-lang-defvar c-opt-op-identifier-prefix
1154 (c-lang-const c-opt-op-identifier-prefix))
1156 ;; Note: the following alias is an old name which was a mis-spelling. It has
1157 ;; been corrected above and throughout cc-engine.el. It will be removed at
1158 ;; some release very shortly in the future. ACM, 2006-04-14.
1159 (defvaralias 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix)
1160 (make-obsolete-variable 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix
1161 "CC Mode 5.31.4, 2006-04-14")
1163 (c-lang-defconst c-other-op-syntax-tokens
1164 "List of the tokens made up of characters in the punctuation or
1165 parenthesis syntax classes that have uses other than as expression
1167 t '("{" "}" "(" ")" "[" "]" ";" ":" "," "=" "/*" "*/" "//")
1168 (c c++ pike) (append '("#" "##" ; Used by cpp.
1170 (c-lang-const c-other-op-syntax-tokens))
1171 (c c++) (append '("*") (c-lang-const c-other-op-syntax-tokens))
1172 c++ (append '("&" "<%" "%>" "<:" ":>" "%:" "%:%:")
1173 (c-lang-const c-other-op-syntax-tokens))
1174 objc (append '("#" "##" ; Used by cpp.
1176 (c-lang-const c-other-op-syntax-tokens))
1177 idl (append '("#" "##") ; Used by cpp.
1178 (c-lang-const c-other-op-syntax-tokens))
1179 pike (append '("..")
1180 (c-lang-const c-other-op-syntax-tokens)
1181 (c-lang-const c-overloadable-operators))
1182 awk '("{" "}" "(" ")" "[" "]" ";" "," "=" "/"))
1184 (c-lang-defconst c-all-op-syntax-tokens
1185 ;; List of all tokens in the punctuation and parenthesis syntax
1187 t (c--delete-duplicates (append (c-lang-const c-other-op-syntax-tokens)
1188 (c-lang-const c-operator-list))
1189 :test 'string-equal))
1191 (c-lang-defconst c-nonsymbol-token-char-list
1192 ;; List containing all chars not in the word, symbol or
1193 ;; syntactically irrelevant syntax classes, i.e. all punctuation,
1194 ;; parenthesis and string delimiter chars.
1195 t (c-with-syntax-table (c-lang-const c-mode-syntax-table)
1196 ;; Only go through the chars in the printable ASCII range. No
1197 ;; language so far has 8-bit or widestring operators.
1198 (let (list (char 32))
1200 (or (memq (char-syntax char) '(?w ?_ ?< ?> ?\ ))
1201 (setq list (cons (c-int-to-char char) list)))
1202 (setq char (1+ char)))
1205 (c-lang-defconst c-nonsymbol-token-regexp
1206 ;; Regexp matching all tokens in the punctuation and parenthesis
1207 ;; syntax classes. Note that this also matches ".", which can start
1209 t (c-make-keywords-re nil
1210 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1212 "\\`\\(\\s.\\)+\\'")))
1213 (c-lang-defvar c-nonsymbol-token-regexp
1214 (c-lang-const c-nonsymbol-token-regexp))
1216 (c-lang-defconst c-assignment-op-regexp
1217 ;; Regexp matching all assignment operators and only them. The
1218 ;; beginning of the first submatch is used to detect the end of the
1219 ;; token, along with the end of the whole match.
1220 t (if (c-lang-const c-assignment-operators)
1222 ;; Need special case for "=" since it's a prefix of "==".
1225 (c-make-keywords-re nil
1226 (c--set-difference (c-lang-const c-assignment-operators)
1228 :test 'string-equal)))
1230 (c-lang-defvar c-assignment-op-regexp
1231 (c-lang-const c-assignment-op-regexp))
1233 (c-lang-defconst c-:$-multichar-token-regexp
1234 ;; Regexp matching all tokens ending in ":" which are longer than one char.
1235 ;; Currently (2016-01-07) only used in C++ Mode.
1236 t (c-make-keywords-re nil
1237 (c-filter-ops (c-lang-const c-operators) t ".+:$")))
1238 (c-lang-defvar c-:$-multichar-token-regexp
1239 (c-lang-const c-:$-multichar-token-regexp))
1241 (c-lang-defconst c-<>-multichar-token-regexp
1242 ;; Regexp matching all tokens containing "<" or ">" which are longer
1244 t (c-make-keywords-re nil
1245 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1248 (c-lang-defvar c-<>-multichar-token-regexp
1249 (c-lang-const c-<>-multichar-token-regexp))
1251 (c-lang-defconst c-<-op-cont-regexp
1252 ;; Regexp matching the second and subsequent characters of all
1253 ;; multicharacter tokens that begin with "<".
1254 t (c-make-keywords-re nil
1255 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1258 (lambda (op) (substring op 1)))))
1259 (c-lang-defvar c-<-op-cont-regexp (c-lang-const c-<-op-cont-regexp))
1261 (c-lang-defconst c->-op-cont-tokens
1262 ;; A list of second and subsequent characters of all multicharacter tokens
1263 ;; that begin with ">".
1264 t (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1267 (lambda (op) (substring op 1)))
1268 java (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1270 "\\`>[^>]\\|\\`>>[^>]"
1271 (lambda (op) (substring op 1))))
1273 (c-lang-defconst c->-op-cont-regexp
1274 ;; Regexp matching the second and subsequent characters of all
1275 ;; multicharacter tokens that begin with ">".
1276 t (c-make-keywords-re nil (c-lang-const c->-op-cont-tokens)))
1277 (c-lang-defvar c->-op-cont-regexp (c-lang-const c->-op-cont-regexp))
1279 (c-lang-defconst c->-op-without->-cont-regexp
1280 ;; Regexp matching the second and subsequent characters of all
1281 ;; multicharacter tokens that begin with ">" except for those beginning with
1283 t (c-make-keywords-re nil
1285 (c-lang-const c->-op-cont-tokens)
1286 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1289 (lambda (op) (substring op 1)))
1290 :test 'string-equal)))
1291 (c-lang-defvar c->-op-without->-cont-regexp
1292 (c-lang-const c->-op-without->-cont-regexp))
1294 (c-lang-defconst c-multichar->-op-not->>-regexp
1295 ;; Regexp matching multichar tokens containing ">", except ">>"
1296 t (c-make-keywords-re nil
1298 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1301 (c-lang-defvar c-multichar->-op-not->>-regexp
1302 (c-lang-const c-multichar->-op-not->>-regexp))
1304 (c-lang-defconst c-stmt-delim-chars
1305 ;; The characters that should be considered to bound statements. To
1306 ;; optimize `c-crosses-statement-barrier-p' somewhat, it's assumed to
1307 ;; begin with "^" to negate the set. If ? : operators should be
1308 ;; detected then the string must end with "?:".
1310 (c-lang-defvar c-stmt-delim-chars (c-lang-const c-stmt-delim-chars))
1312 (c-lang-defconst c-stmt-delim-chars-with-comma
1313 ;; Variant of `c-stmt-delim-chars' that additionally contains ','.
1315 (c-lang-defvar c-stmt-delim-chars-with-comma
1316 (c-lang-const c-stmt-delim-chars-with-comma))
1318 (c-lang-defconst c-auto-ops
1319 ;; Ops which signal C++11's new auto uses.
1322 (c-lang-defconst c-auto-ops-re
1323 t (c-make-keywords-re nil (c-lang-const c-auto-ops)))
1324 (c-lang-defvar c-auto-ops-re (c-lang-const c-auto-ops-re))
1326 (c-lang-defconst c-haskell-op
1327 ;; Op used in the new C++11 auto function definition, indicating type.
1330 (c-lang-defconst c-haskell-op-re
1331 t (c-make-keywords-re nil (c-lang-const c-haskell-op)))
1332 (c-lang-defvar c-haskell-op-re (c-lang-const c-haskell-op-re))
1334 (c-lang-defconst c-pre-start-tokens
1335 "List of operators following which an apparent declaration \(e.g.
1336 \"t1 *fn (t2 *b);\") is most likely to be an actual declaration
1337 \(as opposed to an arithmetic expression)."
1339 (c-lang-defvar c-pre-start-tokens (c-lang-const c-pre-start-tokens))
1342 ;;; Syntactic whitespace.
1344 (c-lang-defconst c-simple-ws
1345 "Regexp matching an ordinary whitespace character.
1346 Does not contain a \\| operator at the top level."
1347 ;; "\\s " is not enough since it doesn't match line breaks.
1348 t "\\(\\s \\|[\n\r]\\)")
1350 (c-lang-defconst c-simple-ws-depth
1351 ;; Number of regexp grouping parens in `c-simple-ws'.
1352 t (regexp-opt-depth (c-lang-const c-simple-ws)))
1354 (c-lang-defconst c-line-comment-starter
1355 "String that starts line comments, or nil if such don't exist.
1356 Line comments are always terminated by newlines. At least one of
1357 `c-block-comment-starter' and this one is assumed to be set.
1359 Note that it's currently not enough to set this to support a new
1360 comment style. Other stuff like the syntax table must also be set up
1364 (c-lang-defvar c-line-comment-starter (c-lang-const c-line-comment-starter))
1366 (c-lang-defconst c-block-comment-starter
1367 "String that starts block comments, or nil if such don't exist.
1368 Block comments are ended by `c-block-comment-ender', which is assumed
1369 to be set if this is. At least one of `c-line-comment-starter' and
1370 this one is assumed to be set.
1372 Note that it's currently not enough to set this to support a new
1373 comment style. Other stuff like the syntax table must also be set up
1378 (c-lang-defconst c-block-comment-ender
1379 "String that ends block comments, or nil if such don't exist.
1381 Note that it's currently not enough to set this to support a new
1382 comment style. Other stuff like the syntax table must also be set up
1387 (c-lang-defconst c-comment-start-regexp
1388 ;; Regexp to match the start of any type of comment.
1389 t (let ((re (c-make-keywords-re nil
1390 (list (c-lang-const c-line-comment-starter)
1391 (c-lang-const c-block-comment-starter)))))
1392 (if (memq 'gen-comment-delim c-emacs-features)
1393 (concat re "\\|\\s!")
1395 (c-lang-defvar c-comment-start-regexp (c-lang-const c-comment-start-regexp))
1397 (c-lang-defconst c-block-comment-start-regexp
1398 ;; Regexp which matches the start of a block comment (if such exists in the
1400 t (if (c-lang-const c-block-comment-starter)
1401 (regexp-quote (c-lang-const c-block-comment-starter))
1403 (c-lang-defvar c-block-comment-start-regexp
1404 (c-lang-const c-block-comment-start-regexp))
1406 (c-lang-defconst c-line-comment-start-regexp
1407 ;; Regexp which matches the start of a line comment (if such exists in the
1408 ;; language; it does in all 7 CC Mode languages).
1409 t (if (c-lang-const c-line-comment-starter)
1410 (regexp-quote (c-lang-const c-line-comment-starter))
1412 (c-lang-defvar c-line-comment-start-regexp
1413 (c-lang-const c-line-comment-start-regexp))
1415 (c-lang-defconst c-literal-start-regexp
1416 ;; Regexp to match the start of comments and string literals.
1417 t (concat (c-lang-const c-comment-start-regexp)
1419 (if (memq 'gen-string-delim c-emacs-features)
1422 (c-lang-defvar c-literal-start-regexp (c-lang-const c-literal-start-regexp))
1424 (c-lang-defconst c-doc-comment-start-regexp
1425 "Regexp to match the start of documentation comments."
1427 ;; From font-lock.el: `doxygen' uses /*! while others use /**.
1428 (c c++ objc) "/\\*[*!]"
1431 (c-lang-defvar c-doc-comment-start-regexp
1432 (c-lang-const c-doc-comment-start-regexp))
1434 (c-lang-defconst comment-start
1435 "String that starts comments inserted with M-; etc.
1436 `comment-start' is initialized from this."
1437 ;; Default: Prefer line comments to block comments, and pad with a space.
1438 t (concat (or (c-lang-const c-line-comment-starter)
1439 (c-lang-const c-block-comment-starter))
1441 ;; In C we still default to the block comment style since line
1442 ;; comments aren't entirely portable.
1444 (c-lang-setvar comment-start (c-lang-const comment-start))
1446 (c-lang-defconst comment-end
1447 "String that ends comments inserted with M-; etc.
1448 `comment-end' is initialized from this."
1449 ;; Default: Use block comment style if comment-start uses block
1450 ;; comments, and pad with a space in that case.
1451 t (if (string-match (concat "\\`\\("
1452 (c-lang-const c-block-comment-start-regexp)
1454 (c-lang-const comment-start))
1455 (concat " " (c-lang-const c-block-comment-ender))
1457 (c-lang-setvar comment-end (c-lang-const comment-end))
1459 (c-lang-defconst comment-start-skip
1460 "Regexp to match the start of a comment plus everything up to its body.
1461 `comment-start-skip' is initialized from this."
1462 ;; Default: Allow the last char of the comment starter(s) to be
1463 ;; repeated, then allow any amount of horizontal whitespace.
1466 (mapcar (lambda (cs)
1468 (concat (regexp-quote cs) "+")))
1469 (list (c-lang-const c-line-comment-starter)
1470 (c-lang-const c-block-comment-starter)))
1473 (c-lang-setvar comment-start-skip (c-lang-const comment-start-skip))
1475 (c-lang-defconst comment-end-can-be-escaped
1476 "When non-nil, escaped EOLs inside comments are valid.
1477 This works in Emacs >= 25.1."
1480 (c-lang-setvar comment-end-can-be-escaped
1481 (c-lang-const comment-end-can-be-escaped))
1483 (c-lang-defconst c-syntactic-ws-start
1484 ;; Regexp matching any sequence that can start syntactic whitespace.
1485 ;; The only uncertain case is '#' when there are cpp directives.
1487 (c-make-keywords-re nil
1488 (append (list (c-lang-const c-line-comment-starter)
1489 (c-lang-const c-block-comment-starter)
1490 (when (c-lang-const c-opt-cpp-prefix)
1494 (when (memq 'gen-comment-delim c-emacs-features)
1496 (c-lang-defvar c-syntactic-ws-start (c-lang-const c-syntactic-ws-start))
1498 (c-lang-defconst c-syntactic-ws-end
1499 ;; Regexp matching any single character that might end syntactic whitespace.
1501 (c-make-keywords-re nil
1502 (append (when (c-lang-const c-block-comment-ender)
1505 (elt (c-lang-const c-block-comment-ender)
1507 (c-lang-const c-block-comment-ender)))))))
1509 (when (memq 'gen-comment-delim c-emacs-features)
1511 (c-lang-defvar c-syntactic-ws-end (c-lang-const c-syntactic-ws-end))
1513 (c-lang-defconst c-unterminated-block-comment-regexp
1514 ;; Regexp matching an unterminated block comment that doesn't
1515 ;; contain line breaks, or nil in languages without block comments.
1516 ;; Does not contain a \| operator at the top level.
1517 t (when (c-lang-const c-block-comment-starter)
1519 (regexp-quote (c-lang-const c-block-comment-starter))
1520 ;; It's messy to cook together a regexp that matches anything
1521 ;; but c-block-comment-ender.
1522 (let ((end (c-lang-const c-block-comment-ender)))
1523 (cond ((= (length end) 1)
1524 (concat "[^" end "\n\r]*"))
1526 (concat "[^" (substring end 0 1) "\n\r]*"
1528 (regexp-quote (substring end 0 1)) "+"
1530 ;; The quoting rules inside char classes are silly. :P
1531 (cond ((= (elt end 0) (elt end 1))
1532 (concat (substring end 0 1) "\n\r"))
1533 ((= (elt end 1) ?\])
1534 (concat (substring end 1 2) "\n\r"
1535 (substring end 0 1)))
1537 (concat (substring end 0 1) "\n\r"
1538 (substring end 1 2))))
1540 "[^" (substring end 0 1) "\n\r]*"
1543 (error "Can't handle a block comment ender of length %s"
1546 (c-lang-defconst c-block-comment-regexp
1547 ;; Regexp matching a block comment that doesn't contain line breaks,
1548 ;; or nil in languages without block comments. The reason we don't
1549 ;; allow line breaks is to avoid going very far and risk running out
1550 ;; of regexp stack; this regexp is intended to handle only short
1551 ;; comments that might be put in the middle of limited constructs
1552 ;; like declarations. Does not contain a \| operator at the top
1554 t (when (c-lang-const c-unterminated-block-comment-regexp)
1556 (c-lang-const c-unterminated-block-comment-regexp)
1557 (let ((end (c-lang-const c-block-comment-ender)))
1558 (cond ((= (length end) 1)
1561 (concat (regexp-quote (substring end 0 1)) "+"
1562 (regexp-quote (substring end 1 2))))
1564 (error "Can't handle a block comment ender of length %s"
1567 (c-lang-defconst c-nonwhite-syntactic-ws
1568 ;; Regexp matching a piece of syntactic whitespace that isn't a
1569 ;; sequence of simple whitespace characters. As opposed to
1570 ;; `c-(forward|backward)-syntactic-ws', this doesn't regard cpp
1571 ;; directives as syntactic whitespace.
1572 t (c-concat-separated
1573 (list (when (c-lang-const c-line-comment-starter)
1574 (concat (regexp-quote (c-lang-const c-line-comment-starter))
1576 (c-lang-const c-block-comment-regexp)
1578 (when (memq 'gen-comment-delim c-emacs-features)
1582 (c-lang-defconst c-syntactic-ws
1583 ;; Regexp matching syntactic whitespace, including possibly the
1584 ;; empty string. As opposed to `c-(forward|backward)-syntactic-ws',
1585 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1586 ;; not contain a \| operator at the top level.
1587 t (concat (c-lang-const c-simple-ws) "*"
1589 (concat "\\(" (c-lang-const c-nonwhite-syntactic-ws) "\\)"
1590 (c-lang-const c-simple-ws) "*")
1593 (c-lang-defconst c-syntactic-ws-depth
1594 ;; Number of regexp grouping parens in `c-syntactic-ws'.
1595 t (regexp-opt-depth (c-lang-const c-syntactic-ws)))
1597 (c-lang-defconst c-nonempty-syntactic-ws
1598 ;; Regexp matching syntactic whitespace, which is at least one
1599 ;; character long. As opposed to `c-(forward|backward)-syntactic-ws',
1600 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1601 ;; not contain a \| operator at the top level.
1603 (c-lang-const c-simple-ws)
1605 (c-lang-const c-nonwhite-syntactic-ws)
1608 (c-lang-defconst c-nonempty-syntactic-ws-depth
1609 ;; Number of regexp grouping parens in `c-nonempty-syntactic-ws'.
1610 t (regexp-opt-depth (c-lang-const c-nonempty-syntactic-ws)))
1612 (c-lang-defconst c-single-line-syntactic-ws
1613 ;; Regexp matching syntactic whitespace without any line breaks. As
1614 ;; opposed to `c-(forward|backward)-syntactic-ws', this doesn't
1615 ;; regard cpp directives as syntactic whitespace. Does not contain
1616 ;; a \| operator at the top level.
1617 t (if (c-lang-const c-block-comment-regexp)
1619 (c-lang-const c-block-comment-regexp)
1623 (c-lang-defconst c-single-line-syntactic-ws-depth
1624 ;; Number of regexp grouping parens in `c-single-line-syntactic-ws'.
1625 t (regexp-opt-depth (c-lang-const c-single-line-syntactic-ws)))
1627 (c-lang-defconst c-syntactic-eol
1628 ;; Regexp that matches when there is no syntactically significant
1629 ;; text before eol. Macros are regarded as syntactically
1630 ;; significant text here.
1631 t (concat (c-lang-const c-single-line-syntactic-ws)
1632 ;; Match eol (possibly inside a block comment or preceded
1633 ;; by a line continuation backslash), or the beginning of a
1634 ;; line comment. Note: This has to be modified for awk
1635 ;; where line comments start with '#'.
1638 (list (when (c-lang-const c-line-comment-starter)
1639 (regexp-quote (c-lang-const c-line-comment-starter)))
1640 (when (c-lang-const c-unterminated-block-comment-regexp)
1641 (concat (c-lang-const c-unterminated-block-comment-regexp)
1647 (c-lang-defvar c-syntactic-eol (c-lang-const c-syntactic-eol))
1652 ;; The Emacs variables beginning-of-defun-function and end-of-defun-function
1653 ;; will be set so that commands like `mark-defun' and `narrow-to-defun' work
1654 ;; right. In older Emacsen, the key sequences C-M-a and C-M-e are, however,
1655 ;; bound directly to the CC Mode functions, allowing optimization for large n.
1656 ;; From Emacs 23, this isn't necessary any more, since n is passed to the two
1658 (c-lang-defconst beginning-of-defun-function
1659 "Function to which beginning-of-defun-function will be set."
1660 t 'c-beginning-of-defun
1661 awk 'c-awk-beginning-of-defun)
1662 (c-lang-setvar beginning-of-defun-function
1663 (c-lang-const beginning-of-defun-function))
1665 (c-lang-defconst end-of-defun-function
1666 "Function to which end-of-defun-function will be set."
1668 awk 'c-awk-end-of-defun)
1669 (c-lang-setvar end-of-defun-function (c-lang-const end-of-defun-function))
1671 ;;; In-comment text handling.
1673 (c-lang-defconst c-paragraph-start
1674 "Regexp to append to `paragraph-start'."
1676 java "\\(@[a-zA-Z]+\\>\\|$\\)" ; For Javadoc.
1677 pike "\\(@[a-zA-Z_-]+\\>\\([^{]\\|$\\)\\|$\\)") ; For Pike refdoc.
1678 (c-lang-defvar c-paragraph-start (c-lang-const c-paragraph-start))
1680 (c-lang-defconst c-paragraph-separate
1681 "Regexp to append to `paragraph-separate'."
1683 pike (c-lang-const c-paragraph-start))
1684 (c-lang-defvar c-paragraph-separate (c-lang-const c-paragraph-separate))
1689 ;; Note: All and only all language constants containing keyword lists
1690 ;; should end with "-kwds"; they're automatically collected into the
1691 ;; `c-kwds-lang-consts' list below and used to build `c-keywords' etc.
1693 (c-lang-defconst c-primitive-type-kwds
1694 "Primitive type keywords. As opposed to the other keyword lists, the
1695 keywords listed here are fontified with the type face instead of the
1698 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1699 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1700 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1703 Do not try to modify this list for end user customizations; the
1704 `*-font-lock-extra-types' variable, where `*' is the mode prefix, is
1705 the appropriate place for that."
1706 t '("char" "double" "float" "int" "long" "short" "signed"
1709 '("_Bool" "_Complex" "_Imaginary") ; Conditionally defined in C99.
1710 (c-lang-const c-primitive-type-kwds))
1712 '("bool" "wchar_t" "char16_t" "char32_t")
1713 (c-lang-const c-primitive-type-kwds))
1714 ;; Objective-C extends C, but probably not the new stuff in C99.
1716 '("id" "Class" "SEL" "IMP" "BOOL")
1717 (c-lang-const c-primitive-type-kwds))
1718 java '("boolean" "byte" "char" "double" "float" "int" "long" "short" "void")
1719 idl '("Object" "ValueBase" "any" "boolean" "char" "double" "fixed" "float"
1720 "long" "octet" "sequence" "short" "string" "void" "wchar" "wstring"
1723 ;; The following can't really end a type, but we have to specify them
1724 ;; here due to the assumption in `c-primitive-type-prefix-kwds'. It
1725 ;; doesn't matter that much.
1726 "unsigned" "strong")
1727 pike '(;; this_program isn't really a keyword, but it's practically
1728 ;; used as a builtin type.
1729 "array" "float" "function" "int" "mapping" "mixed" "multiset"
1730 "object" "program" "string" "this_program" "void"))
1732 (c-lang-defconst c-primitive-type-key
1733 ;; An adorned regexp that matches `c-primitive-type-kwds'.
1734 t (c-make-keywords-re t (c-lang-const c-primitive-type-kwds)))
1735 (c-lang-defvar c-primitive-type-key (c-lang-const c-primitive-type-key))
1737 (c-lang-defconst c-primitive-type-prefix-kwds
1738 "Keywords that might act as prefixes for primitive types. Assumed to
1739 be a subset of `c-primitive-type-kwds'."
1741 (c c++) '("long" "short" "signed" "unsigned")
1742 idl '("long" "unsigned"
1746 (c-lang-defconst c-typedef-kwds
1747 "Prefix keyword(s) like \"typedef\" which make a type declaration out
1748 of a variable declaration."
1752 (c-lang-defconst c-typedef-key
1753 ;; Adorned regexp matching `c-typedef-kwds'.
1754 t (c-make-keywords-re t (c-lang-const c-typedef-kwds)))
1755 (c-lang-defvar c-typedef-key (c-lang-const c-typedef-key))
1757 (c-lang-defconst c-typeof-kwds
1758 "Keywords followed by a parenthesized expression, which stands for
1759 the type of that expression."
1761 c '("typeof") ; longstanding GNU C(++) extension.
1762 c++ '("decltype" "typeof"))
1764 (c-lang-defconst c-typeof-key
1765 ;; Adorned regexp matching `c-typeof-kwds'.
1766 t (c-make-keywords-re t (c-lang-const c-typeof-kwds)))
1767 (c-lang-defvar c-typeof-key (c-lang-const c-typeof-key))
1769 (c-lang-defconst c-type-prefix-kwds
1770 "Keywords where the following name - if any - is a type name, and
1771 where the keyword together with the symbol works as a type in
1774 Note that an alternative if the second part doesn't hold is
1775 `c-type-list-kwds'. Keywords on this list are typically also present
1776 on one of the `*-decl-kwds' lists."
1778 c '("struct" "union" "enum")
1779 c++ (append '("class" "typename")
1780 (c-lang-const c-type-prefix-kwds c)))
1782 (c-lang-defconst c-type-prefix-key
1783 ;; Adorned regexp matching `c-type-prefix-kwds'.
1784 t (c-make-keywords-re t (c-lang-const c-type-prefix-kwds)))
1785 (c-lang-defvar c-type-prefix-key (c-lang-const c-type-prefix-key))
1787 (c-lang-defconst c-type-modifier-kwds
1788 "Type modifier keywords. These can occur almost anywhere in types
1789 but they don't build a type of themselves. Unlike the keywords on
1790 `c-primitive-type-kwds', they are fontified with the keyword face and
1793 c '("const" "restrict" "volatile")
1794 c++ '("const" "constexpr" "noexcept" "volatile" "throw" "final" "override")
1795 objc '("const" "volatile"))
1797 (c-lang-defconst c-opt-type-modifier-key
1798 ;; Adorned regexp matching `c-type-modifier-kwds', or nil in
1799 ;; languages without such keywords.
1800 t (and (c-lang-const c-type-modifier-kwds)
1801 (c-make-keywords-re t (c-lang-const c-type-modifier-kwds))))
1802 (c-lang-defvar c-opt-type-modifier-key (c-lang-const c-opt-type-modifier-key))
1804 (c-lang-defconst c-opt-type-component-key
1805 ;; An adorned regexp that matches `c-primitive-type-prefix-kwds' and
1806 ;; `c-type-modifier-kwds', or nil in languages without any of them.
1807 t (and (or (c-lang-const c-primitive-type-prefix-kwds)
1808 (c-lang-const c-type-modifier-kwds))
1809 (c-make-keywords-re t
1810 (append (c-lang-const c-primitive-type-prefix-kwds)
1811 (c-lang-const c-type-modifier-kwds)))))
1812 (c-lang-defvar c-opt-type-component-key
1813 (c-lang-const c-opt-type-component-key))
1815 (c-lang-defconst c-type-start-kwds
1816 ;; All keywords that can start a type (i.e. are either a type prefix
1817 ;; or a complete type).
1818 t (c--delete-duplicates (append (c-lang-const c-primitive-type-kwds)
1819 (c-lang-const c-type-prefix-kwds)
1820 (c-lang-const c-type-modifier-kwds))
1821 :test 'string-equal))
1823 (c-lang-defconst c-class-decl-kwds
1824 "Keywords introducing declarations where the following block (if any)
1825 contains another declaration level that should be considered a class.
1827 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1828 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1829 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1832 Note that presence on this list does not automatically treat the
1833 following identifier as a type; the keyword must also be present on
1834 `c-type-prefix-kwds' or `c-type-list-kwds' to accomplish that."
1836 c '("struct" "union")
1837 c++ '("class" "struct" "union")
1838 objc '("struct" "union"
1839 "@interface" "@implementation" "@protocol")
1840 java '("class" "@interface" "interface")
1841 idl '("component" "eventtype" "exception" "home" "interface" "struct"
1844 "storagehome" "storagetype"
1846 "catalog" "executor" "manages" "segment")
1849 (c-lang-defconst c-class-key
1850 ;; Regexp matching the start of a class.
1851 t (c-make-keywords-re t (c-lang-const c-class-decl-kwds)))
1852 (c-lang-defvar c-class-key (c-lang-const c-class-key))
1854 (c-lang-defconst c-brace-list-decl-kwds
1855 "Keywords introducing declarations where the following block (if
1856 any) is a brace list.
1858 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1859 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1860 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1865 (c-lang-defconst c-brace-list-key
1866 ;; Regexp matching the start of declarations where the following
1867 ;; block is a brace list.
1868 t (c-make-keywords-re t (c-lang-const c-brace-list-decl-kwds)))
1869 (c-lang-defvar c-brace-list-key (c-lang-const c-brace-list-key))
1871 (c-lang-defconst c-after-brace-list-decl-kwds
1872 "Keywords that might follow keywords in `c-brace-list-decl-kwds'
1873 and precede the opening brace."
1875 c++ '("class" "struct"))
1877 (c-lang-defconst c-after-brace-list-key
1878 ;; Regexp matching keywords that can fall between a brace-list
1879 ;; keyword and the associated brace list.
1880 t (c-make-keywords-re t (c-lang-const c-after-brace-list-decl-kwds)))
1881 (c-lang-defvar c-after-brace-list-key (c-lang-const c-after-brace-list-key))
1883 (c-lang-defconst c-recognize-post-brace-list-type-p
1884 "Set to t when we recognize a colon and then a type after an enum,
1885 e.g., enum foo : int { A, B, C };"
1888 (c-lang-defvar c-recognize-post-brace-list-type-p
1889 (c-lang-const c-recognize-post-brace-list-type-p))
1891 (c-lang-defconst c-other-block-decl-kwds
1892 "Keywords where the following block (if any) contains another
1893 declaration level that should not be considered a class. For every
1894 keyword here, CC Mode will add a set of special syntactic symbols for
1895 those blocks. E.g. if the keyword is \"foo\" then there will be
1896 `foo-open', `foo-close', and `infoo' symbols.
1898 The intention is that this category should be used for block
1899 constructs that aren't related to object orientation concepts like
1900 classes (which thus also include e.g. interfaces, templates,
1901 contracts, structs, etc). The more pragmatic distinction is that
1902 while most want some indentation inside classes, it's fairly common
1903 that they don't want it in some of these constructs, so it should be
1904 simple to configure that differently from classes. See also
1905 `c-class-decl-kwds'.
1907 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1908 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1909 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1912 (c objc) '("extern")
1913 c++ '("namespace" "extern")
1918 (c-lang-defconst c-other-decl-block-key
1919 ;; Regexp matching the start of blocks besides classes that contain
1920 ;; another declaration level.
1921 t (c-make-keywords-re t (c-lang-const c-other-block-decl-kwds)))
1922 (c-lang-defvar c-other-decl-block-key (c-lang-const c-other-decl-block-key))
1924 (c-lang-defvar c-other-decl-block-key-in-symbols-alist
1928 (if (string= elt "extern")
1930 (intern (concat "in" elt)))))
1931 (c-lang-const c-other-block-decl-kwds))
1932 "Alist associating keywords in c-other-decl-block-decl-kwds with
1933 their matching \"in\" syntactic symbols.")
1935 (c-lang-defconst c-typedef-decl-kwds
1936 "Keywords introducing declarations where the identifier(s) being
1939 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1940 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1941 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1943 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1944 ;; (since e.g. "Foo" is a type that's being defined in "class Foo
1946 t (append (c-lang-const c-class-decl-kwds)
1947 (c-lang-const c-brace-list-decl-kwds))
1948 ;; Languages that have a "typedef" construct.
1949 (c c++ objc idl pike) (append (c-lang-const c-typedef-decl-kwds)
1951 ;; Unlike most other languages, exception names are not handled as
1952 ;; types in IDL since they only can occur in "raises" specs.
1953 idl (delete "exception" (append (c-lang-const c-typedef-decl-kwds) nil)))
1955 (c-lang-defconst c-typedef-decl-key
1956 t (c-make-keywords-re t (c-lang-const c-typedef-decl-kwds)))
1957 (c-lang-defvar c-typedef-decl-key (c-lang-const c-typedef-decl-key))
1959 (c-lang-defconst c-typeless-decl-kwds
1960 "Keywords introducing declarations where the \(first) identifier
1961 \(declarator) follows directly after the keyword, without any type.
1963 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1964 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1965 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1967 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1968 ;; (since e.g. "Foo" is the identifier being defined in "class Foo
1970 t (append (c-lang-const c-class-decl-kwds)
1971 (c-lang-const c-brace-list-decl-kwds))
1972 c++ (append (c-lang-const c-typeless-decl-kwds) '("auto")) ; C++11.
1973 ;; Note: "manages" for CORBA CIDL clashes with its presence on
1974 ;; `c-type-list-kwds' for IDL.
1975 idl (append (c-lang-const c-typeless-decl-kwds)
1976 '("factory" "finder" "native"
1981 pike (append (c-lang-const c-class-decl-kwds)
1984 (c-lang-defconst c-modifier-kwds
1985 "Keywords that can prefix normal declarations of identifiers
1986 \(and typically act as flags). Things like argument declarations
1987 inside function headers are also considered declarations in this
1990 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1991 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1992 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1995 (c c++) '("auto" "extern" "inline" "register" "static")
1996 c++ (append '("explicit" "friend" "mutable" "template" "thread_local"
1998 (c-lang-const c-modifier-kwds))
1999 objc '("auto" "bycopy" "byref" "extern" "in" "inout" "oneway" "out" "static")
2000 ;; FIXME: Some of those below ought to be on `c-other-decl-kwds' instead.
2001 idl '("abstract" "attribute" "const" "consumes" "custom" "emits" "import"
2002 "in" "inout" "local" "multiple" "oneway" "out" "private" "provides"
2003 "public" "publishes" "readonly" "typeid" "typeprefix" "uses"
2007 "bindsTo" "delegatesTo" "implements" "proxy" "storedOn")
2008 ;; Note: "const" is not used in Java, but it's still a reserved keyword.
2009 java '("abstract" "const" "default" "final" "native" "private" "protected"
2010 "public" "static" "strictfp" "synchronized" "transient" "volatile")
2011 pike '("final" "inline" "local" "nomask" "optional" "private" "protected"
2012 "public" "static" "variant"))
2014 (c-lang-defconst c-other-decl-kwds
2015 "Keywords that can start or prefix any declaration level construct,
2016 besides those on `c-class-decl-kwds', `c-brace-list-decl-kwds',
2017 `c-other-block-decl-kwds', `c-typedef-decl-kwds',
2018 `c-typeless-decl-kwds' and `c-modifier-kwds'.
2020 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
2021 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
2022 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
2025 objc '("@class" "@end" "@defs")
2026 java '("import" "package")
2027 pike '("import" "inherit"))
2029 (c-lang-defconst c-decl-start-kwds
2030 "Keywords that always start declarations, wherever they occur.
2031 This can be used for declarations that aren't recognized by the normal
2032 combination of `c-decl-prefix-re' and `c-decl-start-re'."
2034 ;; Classes can be declared anywhere in a Pike expression.
2037 (c-lang-defconst c-decl-hangon-kwds
2038 "Keywords that can occur anywhere in a declaration level construct.
2039 This is used for self-contained things that can be tacked on anywhere
2040 on a declaration and that should be ignored to be able to recognize it
2041 correctly. Typical cases are compiler extensions like
2042 \"__attribute__\" or \"__declspec\":
2044 __declspec(noreturn) void foo();
2045 class __declspec(dllexport) classname {...};
2046 void foo() __attribute__((noreturn));
2048 Note that unrecognized plain symbols are skipped anyway if they occur
2049 before the type, so such things are not necessary to mention here.
2050 Mentioning them here is necessary only if they can occur in other
2051 places, or if they are followed by a construct that must be skipped
2052 over \(like the parens in the \"__attribute__\" and \"__declspec\"
2053 examples above). In the last case, they alse need to be present on
2054 one of `c-type-list-kwds', `c-ref-list-kwds',
2055 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
2056 `c-<>-type-kwds', or `c-<>-arglist-kwds'."
2057 ;; NB: These are currently not recognized in all parts of a
2058 ;; declaration. Specifically, they aren't recognized in the middle
2059 ;; of multi-token types, inside declarators, and between the
2060 ;; identifier and the arglist paren of a function declaration.
2062 ;; FIXME: This ought to be user customizable since compiler stuff
2063 ;; like this usually is wrapped in project specific macros. (It'd
2064 ;; of course be even better if we could cope without knowing this.)
2066 (c c++) '(;; GCC extension.
2071 (c-lang-defconst c-decl-hangon-key
2072 ;; Adorned regexp matching `c-decl-hangon-kwds'.
2073 t (c-make-keywords-re t (c-lang-const c-decl-hangon-kwds)))
2074 (c-lang-defvar c-decl-hangon-key (c-lang-const c-decl-hangon-key))
2076 (c-lang-defconst c-prefix-spec-kwds
2077 ;; All keywords that can occur in the preamble of a declaration.
2078 ;; They typically occur before the type, but they are also matched
2079 ;; after presumptive types since we often can't be sure that
2080 ;; something is a type or just some sort of macro in front of the
2081 ;; declaration. They might be ambiguous with types or type
2083 t (c--delete-duplicates (append (c-lang-const c-class-decl-kwds)
2084 (c-lang-const c-brace-list-decl-kwds)
2085 (c-lang-const c-other-block-decl-kwds)
2086 (c-lang-const c-typedef-decl-kwds)
2087 (c-lang-const c-typeless-decl-kwds)
2088 (c-lang-const c-modifier-kwds)
2089 (c-lang-const c-other-decl-kwds)
2090 (c-lang-const c-decl-start-kwds)
2091 (c-lang-const c-decl-hangon-kwds))
2092 :test 'string-equal))
2094 (c-lang-defconst c-prefix-spec-kwds-re
2095 ;; Adorned regexp of `c-prefix-spec-kwds'.
2096 t (c-make-keywords-re t (c-lang-const c-prefix-spec-kwds)))
2098 (c-lang-defvar c-prefix-spec-kwds-re (c-lang-const c-prefix-spec-kwds-re))
2100 (c-lang-defconst c-specifier-key
2101 ;; Adorned regexp of the keywords in `c-prefix-spec-kwds' that aren't
2102 ;; ambiguous with types or type prefixes. These are the keywords (like
2103 ;; extern, namespace, but NOT template) that can modify a declaration.
2104 t (c-make-keywords-re t
2105 (c--set-difference (c-lang-const c-prefix-spec-kwds)
2106 (append (c-lang-const c-type-start-kwds)
2107 (c-lang-const c-<>-arglist-kwds))
2108 :test 'string-equal)))
2109 (c-lang-defvar c-specifier-key (c-lang-const c-specifier-key))
2111 (c-lang-defconst c-postfix-spec-kwds
2112 ;; Keywords that can occur after argument list of a function header
2113 ;; declaration, i.e. in the "K&R region".
2114 t (append (c-lang-const c-postfix-decl-spec-kwds)
2115 (c-lang-const c-decl-hangon-kwds)))
2117 (c-lang-defconst c-not-decl-init-keywords
2118 ;; Adorned regexp matching all keywords that can't appear at the
2119 ;; start of a declaration.
2120 t (c-make-keywords-re t
2121 (c--set-difference (c-lang-const c-keywords)
2122 (append (c-lang-const c-type-start-kwds)
2123 (c-lang-const c-prefix-spec-kwds)
2124 (c-lang-const c-typeof-kwds))
2125 :test 'string-equal)))
2126 (c-lang-defvar c-not-decl-init-keywords
2127 (c-lang-const c-not-decl-init-keywords))
2129 (c-lang-defconst c-not-primitive-type-keywords
2130 "List of all keywords apart from primitive types (like \"int\")."
2131 t (c--set-difference (c-lang-const c-keywords)
2132 (c-lang-const c-primitive-type-kwds)
2133 :test 'string-equal)
2134 ;; The "more" for C++ is the QT keyword (as in "more slots:").
2135 ;; This variable is intended for use in c-beginning-of-statement-1.
2136 c++ (append (c-lang-const c-not-primitive-type-keywords) '("more")))
2138 (c-lang-defconst c-not-primitive-type-keywords-regexp
2139 t (c-make-keywords-re t
2140 (c-lang-const c-not-primitive-type-keywords)))
2141 (c-lang-defvar c-not-primitive-type-keywords-regexp
2142 (c-lang-const c-not-primitive-type-keywords-regexp))
2144 (c-lang-defconst c-protection-kwds
2145 "Access protection label keywords in classes."
2147 c++ '("private" "protected" "public")
2148 objc '("@private" "@protected" "@public"))
2150 (c-lang-defconst c-block-decls-with-vars
2151 "Keywords introducing declarations that can contain a block which
2152 might be followed by variable declarations, e.g. like \"foo\" in
2153 \"class Foo { ... } foo;\". So if there is a block in a declaration
2154 like that, it ends with the following `;' and not right away.
2156 The keywords on list are assumed to also be present on one of the
2157 `*-decl-kwds' lists."
2159 (c objc) '("struct" "union" "enum" "typedef")
2160 c++ '("class" "struct" "union" "enum" "typedef"))
2162 (c-lang-defconst c-opt-block-decls-with-vars-key
2163 ;; Regexp matching the `c-block-decls-with-vars' keywords, or nil in
2164 ;; languages without such constructs.
2165 t (and (c-lang-const c-block-decls-with-vars)
2166 (c-make-keywords-re t (c-lang-const c-block-decls-with-vars))))
2167 (c-lang-defvar c-opt-block-decls-with-vars-key
2168 (c-lang-const c-opt-block-decls-with-vars-key))
2170 (c-lang-defconst c-postfix-decl-spec-kwds
2171 "Keywords introducing extra declaration specifiers in the region
2172 between the header and the body \(i.e. the \"K&R-region\") in
2175 java '("extends" "implements" "throws")
2176 idl '("context" "getraises" "manages" "primarykey" "raises" "setraises"
2179 "as" "const" "implements" "of" "ref"))
2181 (c-lang-defconst c-postfix-decl-spec-key
2182 ;; Regexp matching the keywords in `c-postfix-decl-spec-kwds'.
2183 t (c-make-keywords-re t (c-lang-const c-postfix-decl-spec-kwds)))
2184 (c-lang-defvar c-postfix-decl-spec-key
2185 (c-lang-const c-postfix-decl-spec-key))
2187 (c-lang-defconst c-nonsymbol-sexp-kwds
2188 "Keywords that may be followed by a nonsymbol sexp before whatever
2189 construct it's part of continues."
2191 (c c++ objc) '("extern"))
2193 (c-lang-defconst c-type-list-kwds
2194 "Keywords that may be followed by a comma separated list of type
2195 identifiers, where each optionally can be prefixed by keywords. (Can
2196 also be used for the special case when the list can contain only one
2199 Assumed to be mutually exclusive with `c-ref-list-kwds'. There's no
2200 reason to put keywords on this list if they are on `c-type-prefix-kwds'.
2201 There's also no reason to add keywords that prefixes a normal
2202 declaration consisting of a type followed by a declarator (list), so
2203 the keywords on `c-modifier-kwds' should normally not be listed here
2206 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2207 or variable identifier (that's being defined)."
2211 java '("import" "new" "extends" "super" "implements" "throws")
2212 idl '("manages" "native" "primarykey" "supports"
2214 "as" "implements" "of" "scope")
2217 (c-lang-defconst c-ref-list-kwds
2218 "Keywords that may be followed by a comma separated list of
2219 reference (i.e. namespace/scope/module) identifiers, where each
2220 optionally can be prefixed by keywords. (Can also be used for the
2221 special case when the list can contain only one element.) Assumed to
2222 be mutually exclusive with `c-type-list-kwds'.
2224 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2225 or variable identifier (that's being defined)."
2229 idl '("import" "module"
2234 (c-lang-defconst c-colon-type-list-kwds
2235 "Keywords that may be followed (not necessarily directly) by a colon
2236 and then a comma separated list of type identifiers, where each
2237 optionally can be prefixed by keywords. (Can also be used for the
2238 special case when the list can contain only one element.)"
2240 c++ '("class" "struct")
2241 idl '("component" "eventtype" "home" "interface" "valuetype"
2243 "storagehome" "storagetype"))
2245 (c-lang-defconst c-colon-type-list-re
2246 "Regexp matched after the keywords in `c-colon-type-list-kwds' to skip
2247 forward to the colon. The end of the match is assumed to be directly
2248 after the colon, so the regexp should end with \":\". Must be a
2249 regexp if `c-colon-type-list-kwds' isn't nil."
2250 t (if (c-lang-const c-colon-type-list-kwds)
2251 ;; Disallow various common punctuation chars that can't come
2252 ;; before the ":" that starts the inherit list after "class"
2253 ;; or "struct" in C++. (Also used as default for other
2255 "[^][{}();,/#=:]*:"))
2256 (c-lang-defvar c-colon-type-list-re (c-lang-const c-colon-type-list-re))
2258 (c-lang-defconst c-paren-nontype-kwds
2259 "Keywords that may be followed by a parenthesis expression that doesn't
2260 contain type identifiers."
2262 (c c++) '(;; GCC extension.
2267 (c-lang-defconst c-paren-nontype-key
2268 t (c-make-keywords-re t (c-lang-const c-paren-nontype-kwds)))
2269 (c-lang-defvar c-paren-nontype-key (c-lang-const c-paren-nontype-key))
2271 (c-lang-defconst c-paren-type-kwds
2272 "Keywords that may be followed by a parenthesis expression containing
2273 type identifiers separated by arbitrary tokens."
2278 pike '("array" "function" "int" "mapping" "multiset" "object" "program"))
2280 (c-lang-defconst c-paren-any-kwds
2281 t (c--delete-duplicates (append (c-lang-const c-paren-nontype-kwds)
2282 (c-lang-const c-paren-type-kwds))
2283 :test 'string-equal))
2285 (c-lang-defconst c-<>-type-kwds
2286 "Keywords that may be followed by an angle bracket expression
2287 containing type identifiers separated by \",\". The difference from
2288 `c-<>-arglist-kwds' is that unknown names are taken to be types and
2289 not other identifiers. `c-recognize-<>-arglists' is assumed to be set
2297 (c-lang-defconst c-<>-arglist-kwds
2298 "Keywords that can be followed by a C++ style template arglist; see
2299 `c-recognize-<>-arglists' for details. That language constant is
2300 assumed to be set if this isn't nil."
2303 idl '("fixed" "string" "wstring"))
2305 (c-lang-defconst c-<>-sexp-kwds
2306 ;; All keywords that can be followed by an angle bracket sexp.
2307 t (c--delete-duplicates (append (c-lang-const c-<>-type-kwds)
2308 (c-lang-const c-<>-arglist-kwds))
2309 :test 'string-equal))
2311 (c-lang-defconst c-opt-<>-sexp-key
2312 ;; Adorned regexp matching keywords that can be followed by an angle
2313 ;; bracket sexp. Always set when `c-recognize-<>-arglists' is.
2314 t (c-make-keywords-re t (c-lang-const c-<>-sexp-kwds)))
2315 (c-lang-defvar c-opt-<>-sexp-key (c-lang-const c-opt-<>-sexp-key))
2317 (c-lang-defconst c-inside-<>-type-kwds
2318 "Keywords which, used inside a C++ style template arglist, introduce a type."
2320 java '("extends" "super"))
2322 (c-lang-defconst c-inside-<>-type-key
2323 t (c-make-keywords-re t (c-lang-const c-inside-<>-type-kwds)))
2324 (c-lang-defvar c-inside-<>-type-key (c-lang-const c-inside-<>-type-key))
2326 (c-lang-defconst c-brace-id-list-kwds
2327 "Keywords that may be followed by a brace block containing a comma
2328 separated list of identifier definitions, i.e. like the list of
2329 identifiers that follows the type in a normal declaration."
2330 t (c-lang-const c-brace-list-decl-kwds))
2332 (c-lang-defconst c-block-stmt-1-kwds
2333 "Statement keywords followed directly by a substatement."
2335 c++ '("do" "else" "try")
2336 objc '("do" "else" "@finally" "@try")
2337 java '("do" "else" "finally" "try")
2340 (c-lang-defconst c-block-stmt-1-key
2341 ;; Regexp matching the start of any statement followed directly by a
2342 ;; substatement (doesn't match a bare block, however).
2343 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-kwds)))
2344 (c-lang-defvar c-block-stmt-1-key (c-lang-const c-block-stmt-1-key))
2346 (c-lang-defconst c-block-stmt-1-2-kwds
2347 "Statement keywords optionally followed by a paren sexp.
2348 Keywords here should also be in `c-block-stmt-1-kwds'."
2352 (c-lang-defconst c-block-stmt-1-2-key
2353 ;; Regexp matching the start of a statement which may be followed by a
2354 ;; paren sexp and will then be followed by a substatement.
2355 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-2-kwds)))
2356 (c-lang-defvar c-block-stmt-1-2-key (c-lang-const c-block-stmt-1-2-key))
2358 (c-lang-defconst c-block-stmt-2-kwds
2359 "Statement keywords followed by a paren sexp and then by a substatement."
2360 t '("for" "if" "switch" "while")
2361 c++ '("for" "if" "switch" "while" "catch")
2362 objc '("for" "if" "switch" "while" "@catch" "@synchronized")
2363 java '("for" "if" "switch" "while" "catch" "synchronized")
2365 pike '("for" "if" "switch" "while" "foreach")
2366 awk '("for" "if" "while"))
2368 (c-lang-defconst c-block-stmt-2-key
2369 ;; Regexp matching the start of any statement followed by a paren sexp
2370 ;; and then by a substatement.
2371 t (c-make-keywords-re t (c-lang-const c-block-stmt-2-kwds)))
2372 (c-lang-defvar c-block-stmt-2-key (c-lang-const c-block-stmt-2-key))
2374 (c-lang-defconst c-block-stmt-kwds
2375 ;; Union of `c-block-stmt-1-kwds' and `c-block-stmt-2-kwds'.
2376 t (c--delete-duplicates (append (c-lang-const c-block-stmt-1-kwds)
2377 (c-lang-const c-block-stmt-2-kwds))
2378 :test 'string-equal))
2380 (c-lang-defconst c-opt-block-stmt-key
2381 ;; Regexp matching the start of any statement that has a
2382 ;; substatement (except a bare block). Nil in languages that
2383 ;; don't have such constructs.
2384 t (if (or (c-lang-const c-block-stmt-1-kwds)
2385 (c-lang-const c-block-stmt-2-kwds))
2386 (c-make-keywords-re t
2387 (append (c-lang-const c-block-stmt-1-kwds)
2388 (c-lang-const c-block-stmt-2-kwds)))))
2389 (c-lang-defvar c-opt-block-stmt-key (c-lang-const c-opt-block-stmt-key))
2391 (c-lang-defconst c-simple-stmt-kwds
2392 "Statement keywords followed by an expression or nothing."
2393 t '("break" "continue" "goto" "return")
2394 objc '("break" "continue" "goto" "return" "@throw")
2395 ;; Note: `goto' is not valid in Java, but the keyword is still reserved.
2396 java '("break" "continue" "goto" "return" "throw")
2398 pike '("break" "continue" "return")
2399 awk '(;; Not sure about "delete", "exit", "getline", etc. ; ACM 2002/5/30
2400 "break" "continue" "return" "delete" "exit" "getline" "next"
2401 "nextfile" "print" "printf"))
2403 (c-lang-defconst c-simple-stmt-key
2404 ;; Adorned regexp matching `c-simple-stmt-kwds'.
2405 t (c-make-keywords-re t (c-lang-const c-simple-stmt-kwds)))
2406 (c-lang-defvar c-simple-stmt-key (c-lang-const c-simple-stmt-key))
2408 (c-lang-defconst c-paren-stmt-kwds
2409 "Statement keywords followed by a parenthesis expression that
2410 nevertheless contains a list separated with `;' and not `,'."
2414 (c-lang-defconst c-paren-stmt-key
2415 ;; Adorned regexp matching `c-paren-stmt-kwds'.
2416 t (c-make-keywords-re t (c-lang-const c-paren-stmt-kwds)))
2417 (c-lang-defvar c-paren-stmt-key (c-lang-const c-paren-stmt-key))
2419 (c-lang-defconst c-asm-stmt-kwds
2420 "Statement keywords followed by an assembler expression."
2422 (c c++) '("asm" "__asm__")) ;; Not standard, but common.
2424 (c-lang-defconst c-opt-asm-stmt-key
2425 ;; Regexp matching the start of an assembler statement. Nil in
2426 ;; languages that don't support that.
2427 t (if (c-lang-const c-asm-stmt-kwds)
2428 (c-make-keywords-re t (c-lang-const c-asm-stmt-kwds))))
2429 (c-lang-defvar c-opt-asm-stmt-key (c-lang-const c-opt-asm-stmt-key))
2431 (c-lang-defconst c-case-kwds
2432 "The keyword(s) which introduce a \"case\" like construct.
2433 This construct is \"<keyword> <expression> :\"."
2437 (c-lang-defconst c-case-kwds-regexp
2438 ;; Adorned regexp matching any "case"-like keyword.
2439 t (c-make-keywords-re t (c-lang-const c-case-kwds)))
2440 (c-lang-defvar c-case-kwds-regexp (c-lang-const c-case-kwds-regexp))
2442 (c-lang-defconst c-label-kwds
2443 "Keywords introducing colon terminated labels in blocks."
2444 t '("case" "default"))
2446 (c-lang-defconst c-label-kwds-regexp
2447 ;; Adorned regexp matching any keyword that introduces a label.
2448 t (c-make-keywords-re t (c-lang-const c-label-kwds)))
2449 (c-lang-defvar c-label-kwds-regexp (c-lang-const c-label-kwds-regexp))
2451 (c-lang-defconst c-before-label-kwds
2452 "Keywords that might be followed by a label identifier."
2454 (java pike) (append '("break" "continue")
2455 (c-lang-const c-before-label-kwds))
2459 (c-lang-defconst c-constant-kwds
2460 "Keywords for constants."
2462 c '("NULL" ;; Not a keyword, but practically works as one.
2463 "false" "true") ; Defined in C99.
2466 (c-lang-const c-constant-kwds c))
2467 objc '("nil" "Nil" "YES" "NO" "NS_DURING" "NS_HANDLER" "NS_ENDHANDLER")
2468 idl '("TRUE" "FALSE")
2469 java '("true" "false" "null") ; technically "literals", not keywords
2470 pike '("UNDEFINED")) ;; Not a keyword, but practically works as one.
2472 (c-lang-defconst c-primary-expr-kwds
2473 "Keywords besides constants and operators that start primary expressions."
2475 c++ '("operator" "this")
2476 objc '("super" "self")
2478 pike '("this")) ;; Not really a keyword, but practically works as one.
2480 (c-lang-defconst c-expr-kwds
2481 ;; Keywords that can occur anywhere in expressions. Built from
2482 ;; `c-primary-expr-kwds' and all keyword operators in `c-operators'.
2483 t (c--delete-duplicates
2484 (append (c-lang-const c-primary-expr-kwds)
2485 (c-filter-ops (c-lang-const c-operator-list)
2487 "\\`\\(\\w\\|\\s_\\)+\\'"))
2488 :test 'string-equal))
2490 (c-lang-defconst c-lambda-kwds
2491 "Keywords that start lambda constructs, i.e. function definitions in
2496 (c-lang-defconst c-inexpr-block-kwds
2497 "Keywords that start constructs followed by statement blocks which can
2498 be used in expressions \(the gcc extension for this in C and C++ is
2499 handled separately by `c-recognize-paren-inexpr-blocks')."
2501 pike '("catch" "gauge"))
2503 (c-lang-defconst c-inexpr-class-kwds
2504 "Keywords that can start classes inside expressions."
2509 (c-lang-defconst c-inexpr-brace-list-kwds
2510 "Keywords that can start brace list blocks inside expressions.
2511 Note that Java specific rules are currently applied to tell this from
2512 `c-inexpr-class-kwds'."
2516 (c-lang-defconst c-opt-inexpr-brace-list-key
2517 ;; Regexp matching the start of a brace list in an expression, or
2518 ;; nil in languages that don't have such things. This should not
2519 ;; match brace lists recognized through `c-special-brace-lists'.
2520 t (and (c-lang-const c-inexpr-brace-list-kwds)
2521 (c-make-keywords-re t (c-lang-const c-inexpr-brace-list-kwds))))
2522 (c-lang-defvar c-opt-inexpr-brace-list-key
2523 (c-lang-const c-opt-inexpr-brace-list-key))
2525 (c-lang-defconst c-decl-block-key
2526 ;; Regexp matching keywords in any construct that contain another
2527 ;; declaration level, i.e. that isn't followed by a function block
2528 ;; or brace list. When the first submatch matches, it's an
2529 ;; unambiguous construct, otherwise it's an ambiguous match that
2530 ;; might also be the return type of a function declaration.
2531 t (let* ((decl-kwds (append (c-lang-const c-class-decl-kwds)
2532 (c-lang-const c-other-block-decl-kwds)
2533 (c-lang-const c-inexpr-class-kwds)))
2534 (unambiguous (c--set-difference decl-kwds
2535 (c-lang-const c-type-start-kwds)
2536 :test 'string-equal))
2537 (ambiguous (c--intersection decl-kwds
2538 (c-lang-const c-type-start-kwds)
2539 :test 'string-equal)))
2541 (concat (c-make-keywords-re t unambiguous)
2543 (c-make-keywords-re t ambiguous))
2544 (c-make-keywords-re t unambiguous))))
2545 (c-lang-defvar c-decl-block-key (c-lang-const c-decl-block-key))
2547 (c-lang-defconst c-bitfield-kwds
2548 "Keywords that can introduce bitfields."
2550 (c c++ objc) '("char" "int" "long" "signed" "unsigned"))
2552 (c-lang-defconst c-opt-bitfield-key
2553 ;; Regexp matching the start of a bitfield (not uniquely), or nil in
2554 ;; languages without bitfield support.
2556 (c c++) (c-make-keywords-re t (c-lang-const c-bitfield-kwds)))
2557 (c-lang-defvar c-opt-bitfield-key (c-lang-const c-opt-bitfield-key))
2559 (c-lang-defconst c-other-kwds
2560 "Keywords not accounted for by any other `*-kwds' language constant."
2563 ;; In CORBA CIDL: (These are declaration keywords that never
2564 ;; can start a declaration.)
2565 "entity" "process" "service" "session" "storage"))
2568 ;;; Constants built from keywords.
2570 ;; Note: No `*-kwds' language constants may be defined below this point.
2573 (defconst c-kwds-lang-consts
2574 ;; List of all the language constants that contain keyword lists.
2576 (mapatoms (lambda (sym)
2577 (when (and (boundp sym)
2578 (string-match "-kwds\\'" (symbol-name sym)))
2579 ;; Make the list of globally interned symbols
2580 ;; instead of ones interned in `c-lang-constants'.
2581 (setq list (cons (intern (symbol-name sym)) list))))
2585 (c-lang-defconst c-keywords
2586 ;; All keywords as a list.
2587 t (c--delete-duplicates
2588 (c-lang-defconst-eval-immediately
2589 `(append ,@(mapcar (lambda (kwds-lang-const)
2590 `(c-lang-const ,kwds-lang-const))
2593 :test 'string-equal))
2595 (c-lang-defconst c-keywords-regexp
2596 ;; All keywords as an adorned regexp.
2597 t (c-make-keywords-re t (c-lang-const c-keywords)))
2598 (c-lang-defvar c-keywords-regexp (c-lang-const c-keywords-regexp))
2600 (c-lang-defconst c-keyword-member-alist
2601 ;; An alist with all the keywords in the cars. The cdr for each
2602 ;; keyword is a list of the symbols for the `*-kwds' lists that
2604 t (let ((kwd-list-alist
2605 (c-lang-defconst-eval-immediately
2606 `(list ,@(mapcar (lambda (kwds-lang-const)
2607 `(cons ',kwds-lang-const
2608 (c-lang-const ,kwds-lang-const)))
2609 c-kwds-lang-consts))))
2610 lang-const kwd-list kwd
2612 (while kwd-list-alist
2613 (setq lang-const (caar kwd-list-alist)
2614 kwd-list (cdar kwd-list-alist)
2615 kwd-list-alist (cdr kwd-list-alist))
2617 (setq kwd (car kwd-list)
2618 kwd-list (cdr kwd-list))
2619 (unless (setq elem (assoc kwd result-alist))
2620 (setq result-alist (cons (setq elem (list kwd)) result-alist)))
2621 (unless (memq lang-const (cdr elem))
2622 (setcdr elem (cons lang-const (cdr elem))))))
2625 (c-lang-defvar c-keywords-obarray
2626 ;; An obarray containing all keywords as symbols. The property list
2627 ;; of each symbol has a non-nil entry for the specific `*-kwds'
2628 ;; lists it's a member of.
2630 ;; E.g. to see whether the string str contains a keyword on
2631 ;; `c-class-decl-kwds', one can do like this:
2632 ;; (get (intern-soft str c-keyword-obarray) 'c-class-decl-kwds)
2633 ;; Which preferably is written using the associated functions in
2635 ;; (c-keyword-member (c-keyword-sym str) 'c-class-decl-kwds)
2637 ;; The obarray is not stored directly as a language constant since
2638 ;; the printed representation for obarrays used in .elc files isn't
2641 (let* ((alist (c-lang-const c-keyword-member-alist))
2643 (obarray (make-vector (* (length alist) 2) 0)))
2645 (setq kwd (caar alist)
2646 lang-const-list (cdar alist)
2648 (setplist (intern kwd obarray)
2649 ;; Emacs has an odd bug that causes `mapcan' to fail
2650 ;; with unintelligible errors. (XEmacs works.)
2651 ;; (2015-06-24): This bug has not yet been fixed.
2652 ;;(mapcan (lambda (lang-const)
2653 ;; (list lang-const t))
2655 (apply 'nconc (mapcar (lambda (lang-const)
2656 (list lang-const t))
2660 (c-lang-defconst c-regular-keywords-regexp
2661 ;; Adorned regexp matching all keywords that should be fontified
2662 ;; with the keywords face. I.e. that aren't types or constants.
2663 t (c-make-keywords-re t
2664 (c--set-difference (c-lang-const c-keywords)
2665 (append (c-lang-const c-primitive-type-kwds)
2666 (c-lang-const c-constant-kwds))
2667 :test 'string-equal)))
2668 (c-lang-defvar c-regular-keywords-regexp
2669 (c-lang-const c-regular-keywords-regexp))
2671 (c-lang-defconst c-primary-expr-regexp
2672 ;; Regexp matching the start of any primary expression, i.e. any
2673 ;; literal, symbol, prefix operator, and '('. It doesn't need to
2674 ;; exclude keywords; they are excluded afterwards unless the second
2675 ;; submatch matches. If the first but not the second submatch
2676 ;; matches then it is an ambiguous primary expression; it could also
2677 ;; be a match of e.g. an infix operator. (The case with ambiguous
2678 ;; keyword operators isn't handled.)
2680 t (let* ((prefix-ops
2681 (c-filter-ops (c-lang-const c-operators)
2684 ;; Filter out the special case prefix
2685 ;; operators that are close parens.
2686 (not (string-match "\\s)" op)))))
2688 (nonkeyword-prefix-ops
2689 (c-filter-ops prefix-ops
2691 "\\`\\(\\s.\\|\\s(\\|\\s)\\)+\\'"))
2694 (c-filter-ops (c-lang-const c-operators)
2699 right-assoc-sequence)
2702 (unambiguous-prefix-ops (c--set-difference nonkeyword-prefix-ops
2704 :test 'string-equal))
2705 (ambiguous-prefix-ops (c--intersection nonkeyword-prefix-ops
2707 :test 'string-equal)))
2711 ;; Take out all symbol class operators from `prefix-ops' and make the
2712 ;; first submatch from them together with `c-primary-expr-kwds'.
2713 (c-make-keywords-re t
2714 (append (c-lang-const c-primary-expr-kwds)
2715 (c--set-difference prefix-ops nonkeyword-prefix-ops
2716 :test 'string-equal)))
2719 ;; Match all ambiguous operators.
2720 (c-make-keywords-re nil
2721 (c--intersection nonkeyword-prefix-ops in-or-postfix-ops
2722 :test 'string-equal))
2726 ;; Now match all other symbols.
2727 (c-lang-const c-symbol-start)
2730 ;; The chars that can start integer and floating point
2735 ;; The unambiguous operators from `prefix-ops'.
2736 (c-make-keywords-re nil
2737 (c--set-difference nonkeyword-prefix-ops in-or-postfix-ops
2738 :test 'string-equal))
2741 ;; Match string and character literals.
2743 (if (memq 'gen-string-delim c-emacs-features)
2746 (c-lang-defvar c-primary-expr-regexp (c-lang-const c-primary-expr-regexp))
2749 ;;; Additional constants for parser-level constructs.
2751 (c-lang-defconst c-decl-start-colon-kwd-re
2752 "Regexp matching a keyword that is followed by a colon, where
2753 the whole construct can precede a declaration.
2754 E.g. \"public:\" in C++."
2756 c++ (c-make-keywords-re t (c-lang-const c-protection-kwds)))
2757 (c-lang-defvar c-decl-start-colon-kwd-re
2758 (c-lang-const c-decl-start-colon-kwd-re))
2760 (c-lang-defconst c-decl-prefix-re
2761 "Regexp matching something that might precede a declaration, cast or
2762 label, such as the last token of a preceding statement or declaration.
2763 This is used in the common situation where a declaration or cast
2764 doesn't start with any specific token that can be searched for.
2766 The regexp should not match bob; that is done implicitly. It can't
2767 require a match longer than one token. The end of the token is taken
2768 to be at the end of the first submatch, which is assumed to always
2769 match. It's undefined whether identifier syntax (see
2770 `c-identifier-syntax-table') is in effect or not. This regexp is
2771 assumed to be a superset of `c-label-prefix-re' if
2772 `c-recognize-colon-labels' is set.
2774 Besides this, `c-decl-start-kwds' is used to find declarations.
2776 Note: This variable together with `c-decl-start-re' and
2777 `c-decl-start-kwds' is only used to detect \"likely\"
2778 declaration/cast/label starts. I.e. they might produce more matches
2779 but should not miss anything (or else it's necessary to use text
2780 properties - see the next note). Wherever they match, the following
2781 construct is analyzed to see if it indeed is a declaration, cast or
2782 label. That analysis is not cheap, so it's important that not too
2783 many false matches are triggered.
2785 Note: If a declaration/cast/label start can't be detected with this
2786 variable, it's necessary to use the `c-type' text property with the
2787 value `c-decl-end' on the last char of the last token preceding the
2788 declaration. See the comment blurb at the start of cc-engine.el for
2791 ;; We match a sequence of characters to skip over things like \"};\"
2792 ;; more quickly. We match ")" in C for K&R region declarations, and
2793 ;; in all languages except Java for when a cpp macro definition
2794 ;; begins with a declaration.
2796 java "\\([{}(;,<]+\\)"
2797 ;; Match "<" in C++ to get the first argument in a template arglist.
2798 ;; In that case there's an additional check in `c-find-decl-spots'
2799 ;; that it got open paren syntax. Match ":" to aid in picking up
2800 ;; "public:", etc. This involves additional checks in
2801 ;; `c-find-decl-prefix-search' to prevent a match of identifiers
2803 c++ "\\([{}();:,<]+\\)"
2804 ;; Additionally match the protection directives in Objective-C.
2805 ;; Note that this doesn't cope with the longer directives, which we
2806 ;; would have to match from start to end since they don't end with
2807 ;; any easily recognized characters.
2808 objc (concat "\\([{}();,]+\\|"
2809 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
2811 ;; Pike is like C but we also match "[" for multiple value
2812 ;; assignments and type casts.
2813 pike "\\([{}()[;,]+\\)")
2814 (c-lang-defvar c-decl-prefix-re (c-lang-const c-decl-prefix-re)
2817 (c-lang-defconst c-decl-start-re
2818 "Regexp matching the start of any declaration, cast or label.
2819 It's used on the token after the one `c-decl-prefix-re' matched. This
2820 regexp should not try to match those constructs accurately as it's
2821 only used as a sieve to avoid spending more time checking other
2823 t (c-lang-const c-identifier-start))
2824 (c-lang-defvar c-decl-start-re (c-lang-const c-decl-start-re))
2826 (c-lang-defconst c-decl-prefix-or-start-re
2827 ;; Regexp matching something that might precede or start a
2828 ;; declaration, cast or label.
2830 ;; If the first submatch matches, it's taken to match the end of a
2831 ;; token that might precede such a construct, e.g. ';', '}' or '{'.
2832 ;; It's built from `c-decl-prefix-re'.
2834 ;; If the first submatch did not match, the match of the whole
2835 ;; regexp is taken to be at the first token in the declaration.
2836 ;; `c-decl-start-re' is not checked in this case.
2838 ;; Design note: The reason the same regexp is used to match both
2839 ;; tokens that precede declarations and start them is to avoid an
2840 ;; extra regexp search from the previous declaration spot in
2841 ;; `c-find-decl-spots'. Users of `c-find-decl-spots' also count on
2842 ;; that it finds all declaration/cast/label starts in approximately
2843 ;; linear order, so we can't do the searches in two separate passes.
2844 t (if (c-lang-const c-decl-start-kwds)
2845 (concat (c-lang-const c-decl-prefix-re)
2847 (c-make-keywords-re t (c-lang-const c-decl-start-kwds)))
2848 (c-lang-const c-decl-prefix-re)))
2849 (c-lang-defvar c-decl-prefix-or-start-re
2850 (c-lang-const c-decl-prefix-or-start-re)
2853 (c-lang-defconst c-cast-parens
2854 ;; List containing the paren characters that can open a cast, or nil in
2855 ;; languages without casts.
2856 t (c-filter-ops (c-lang-const c-operators)
2859 (lambda (op) (elt op 0))))
2860 (c-lang-defvar c-cast-parens (c-lang-const c-cast-parens))
2862 (c-lang-defconst c-block-prefix-disallowed-chars
2863 "List of syntactically relevant characters that never can occur before
2864 the open brace in any construct that contains a brace block, e.g. in
2865 the \"class Foo: public Bar\" part of:
2867 class Foo: public Bar {int x();} a, *b;
2869 If parens can occur, the chars inside those aren't filtered with this
2872 `<' and `>' should be disallowed even if angle bracket arglists can
2873 occur. That since the search function needs to stop at them anyway to
2874 ensure they are given paren syntax.
2876 This is used to skip backward from the open brace to find the region
2877 in which to look for a construct like \"class\", \"enum\",
2878 \"namespace\" or whatever. That skipping should be as tight as
2879 possible for good performance."
2881 ;; Default to all chars that only occurs in nonsymbol tokens outside
2883 t (c--set-difference
2884 (c-lang-const c-nonsymbol-token-char-list)
2885 (c-filter-ops (append (c-lang-const c-identifier-ops)
2887 (c-lang-const c-after-id-concat-ops))))
2892 (while (string-match "\\(\\s.\\|\\s(\\|\\s)\\)"
2894 (setq res (cons (aref op (match-beginning 1)) res)
2898 ;; Allow cpp operations (where applicable).
2899 t (if (c-lang-const c-opt-cpp-prefix)
2900 (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2902 (c-lang-const c-block-prefix-disallowed-chars))
2904 ;; Allow ':' for inherit list starters.
2905 (c++ objc idl) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2908 ;; Allow ',' for multiple inherits.
2909 (c++ java) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2912 ;; Allow parentheses for anonymous inner classes in Java and class
2913 ;; initializer lists in Pike.
2914 (java pike) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2917 ;; Allow '"' for extern clauses (e.g. extern "C" {...}).
2918 (c c++ objc) (c--set-difference (c-lang-const c-block-prefix-disallowed-chars)
2921 (c-lang-defconst c-block-prefix-charset
2922 ;; `c-block-prefix-disallowed-chars' as an inverted charset suitable
2923 ;; for `c-syntactic-skip-backward'.
2924 t (c-make-bare-char-alt (c-lang-const c-block-prefix-disallowed-chars) t))
2925 (c-lang-defvar c-block-prefix-charset (c-lang-const c-block-prefix-charset))
2927 (c-lang-defconst c-type-decl-prefix-key
2928 "Regexp matching any declarator operator that might precede the
2929 identifier in a declaration, e.g. the \"*\" in \"char *argv\". This
2930 regexp should match \"(\" if parentheses are valid in declarators.
2931 The end of the first submatch is taken as the end of the operator.
2932 Identifier syntax is in effect when this is matched \(see
2933 `c-identifier-syntax-table')."
2934 t (if (c-lang-const c-type-modifier-kwds)
2935 (concat (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>")
2936 ;; Default to a regexp that never matches.
2938 ;; Check that there's no "=" afterwards to avoid matching tokens
2940 (c objc) (concat "\\("
2943 (c-lang-const c-type-decl-prefix-key)
2949 (c-lang-const c-type-decl-prefix-key)
2952 ;; If this matches there's special treatment in
2953 ;; `c-font-lock-declarators' and
2954 ;; `c-font-lock-declarations' that check for a
2955 ;; complete name followed by ":: *".
2956 (c-lang-const c-identifier-start)
2960 pike "\\(\\*\\)\\([^=]\\|$\\)")
2961 (c-lang-defvar c-type-decl-prefix-key (c-lang-const c-type-decl-prefix-key)
2964 (c-lang-defconst c-type-decl-suffix-key
2965 "Regexp matching the declarator operators that might follow after the
2966 identifier in a declaration, e.g. the \"[\" in \"char argv[]\". This
2967 regexp should match \")\" if parentheses are valid in declarators. If
2968 it matches an open paren of some kind, the type declaration check
2969 continues at the corresponding close paren, otherwise the end of the
2970 first submatch is taken as the end of the operator. Identifier syntax
2971 is in effect when this is matched (see `c-identifier-syntax-table')."
2972 ;; Default to a regexp that matches `c-type-modifier-kwds' and a
2973 ;; function argument list parenthesis.
2974 t (if (c-lang-const c-type-modifier-kwds)
2976 (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>"
2979 (c c++ objc) (concat
2982 (if (c-lang-const c-type-modifier-kwds)
2985 ;; "throw" in `c-type-modifier-kwds' is followed
2986 ;; by a parenthesis list, but no extra measures
2987 ;; are necessary to handle that.
2988 (regexp-opt (c-lang-const c-type-modifier-kwds) t)
2994 (c-lang-defvar c-type-decl-suffix-key (c-lang-const c-type-decl-suffix-key)
2997 (c-lang-defconst c-after-suffixed-type-decl-key
2998 "This regexp is matched after a declarator expression where
2999 `c-type-decl-suffix-key' has matched. If it matches then the
3000 construct is taken as a declaration. It's typically used to match the
3001 beginning of a function body or whatever might occur after the
3002 function header in a function declaration or definition. It's
3003 undefined whether identifier syntax (see `c-identifier-syntax-table')
3004 is in effect or not.
3006 Note that it's used in cases like after \"foo (bar)\" so it should
3007 only match when it's certain that it's a declaration, e.g., \"{\" but
3008 not \",\" or \";\"."
3010 ;; If K&R style declarations should be recognized then one could
3011 ;; consider to match the start of any symbol since we want to match
3012 ;; the start of the first declaration in the "K&R region". That
3013 ;; could however produce false matches on code like "FOO(bar) x"
3014 ;; where FOO is a cpp macro, so it's better to leave it out and rely
3015 ;; on the other heuristics in that case.
3016 t (if (c-lang-const c-postfix-spec-kwds)
3017 ;; Add on the keywords in `c-postfix-spec-kwds'.
3018 (concat (c-lang-const c-after-suffixed-type-decl-key)
3020 (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
3021 (c-lang-const c-after-suffixed-type-decl-key))
3022 ;; Also match the colon that starts a base class initializer list in
3023 ;; C++. That can be confused with a function call before the colon
3024 ;; in a ? : operator, but we count on that `c-decl-prefix-re' won't
3025 ;; match before such a thing (as a declaration-level construct;
3026 ;; matches inside arglist contexts are already excluded).
3028 (c-lang-defvar c-after-suffixed-type-decl-key
3029 (c-lang-const c-after-suffixed-type-decl-key)
3032 (c-lang-defconst c-after-suffixed-type-maybe-decl-key
3033 ;; Regexp that in addition to `c-after-suffixed-type-decl-key'
3034 ;; matches ";" and ",".
3035 t (concat "\\(" (c-lang-const c-after-suffixed-type-decl-key) "\\)"
3037 (c-lang-defvar c-after-suffixed-type-maybe-decl-key
3038 (c-lang-const c-after-suffixed-type-maybe-decl-key))
3040 (c-lang-defconst c-opt-type-concat-key
3041 "Regexp matching operators that concatenate types, e.g. the \"|\" in
3042 \"int|string\" in Pike. The end of the first submatch is taken as the
3043 end of the operator. nil in languages without such operators. It's
3044 undefined whether identifier syntax (see `c-identifier-syntax-table')
3045 is in effect or not."
3047 pike "\\([|.&]\\)\\($\\|[^|.&]\\)")
3048 (c-lang-defvar c-opt-type-concat-key (c-lang-const c-opt-type-concat-key)
3051 (c-lang-defconst c-opt-type-suffix-key
3052 "Regexp matching operators that might follow after a type, or nil in
3053 languages that don't have such operators. The end of the first
3054 submatch is taken as the end of the operator. This should not match
3055 things like C++ template arglists if `c-recognize-<>-arglists' is set.
3056 It's undefined whether identifier syntax (see `c-identifier-syntax-table')
3057 is in effect or not."
3059 (c c++ objc pike) "\\(\\.\\.\\.\\)"
3060 java (concat "\\(\\[" (c-lang-const c-simple-ws) "*\\]\\|\\.\\.\\.\\)"))
3061 (c-lang-defvar c-opt-type-suffix-key (c-lang-const c-opt-type-suffix-key))
3063 (c-lang-defvar c-known-type-key
3064 ;; Regexp matching the known type identifiers. This is initialized
3065 ;; from the type keywords and `*-font-lock-extra-types'. The first
3066 ;; submatch is the one that matches the type. Note that this regexp
3067 ;; assumes that symbol constituents like '_' and '$' have word
3070 (when (boundp (c-mode-symbol "font-lock-extra-types"))
3071 (c-mode-var "font-lock-extra-types")))
3073 (delq nil (mapcar (lambda (re)
3074 (when (string-match "[][.*+?^$\\]" re)
3078 (delq nil (mapcar (lambda (re)
3079 (unless (string-match "[][.*+?^$\\]" re)
3084 (append (list (c-make-keywords-re nil
3085 (append (c-lang-const c-primitive-type-kwds)
3091 (c-lang-defconst c-special-brace-lists
3092 "List of open- and close-chars that makes up a pike-style brace list,
3093 i.e., for a ([ ]) list there should be a cons (?\\[ . ?\\]) in this
3096 pike '((?{ . ?}) (?\[ . ?\]) (?< . ?>)))
3097 (c-lang-defvar c-special-brace-lists (c-lang-const c-special-brace-lists))
3099 (c-lang-defconst c-recognize-knr-p
3100 "Non-nil means K&R style argument declarations are valid."
3103 (c-lang-defvar c-recognize-knr-p (c-lang-const c-recognize-knr-p))
3105 (c-lang-defconst c-recognize-typeless-decls
3106 "Non-nil means function declarations without return type should be
3107 recognized. That can introduce an ambiguity with parenthesized macro
3108 calls before a brace block. This setting does not affect declarations
3109 that are preceded by a declaration starting keyword, so
3110 e.g. `c-typeless-decl-kwds' may still be used when it's set to nil."
3112 (c c++ objc java) t)
3113 (c-lang-defvar c-recognize-typeless-decls
3114 (c-lang-const c-recognize-typeless-decls))
3116 (c-lang-defconst c-recognize-<>-arglists
3117 "Non-nil means C++ style template arglists should be handled. More
3118 specifically, this means a comma separated list of types or
3119 expressions surrounded by \"<\" and \">\". It's always preceded by an
3120 identifier or one of the keywords on `c-<>-type-kwds' or
3121 `c-<>-arglist-kwds'. If there's an identifier before then the whole
3122 expression is considered to be a type."
3123 t (or (consp (c-lang-const c-<>-type-kwds))
3124 (consp (c-lang-const c-<>-arglist-kwds)))
3125 java t) ; 2008-10-19. This is crude. The syntax for java
3126 ; generics is not yet coded in CC Mode.
3127 (c-lang-defvar c-recognize-<>-arglists (c-lang-const c-recognize-<>-arglists))
3129 (c-lang-defconst c-<>-notable-chars-re
3130 "A regexp matching any single character notable inside a <...> construct.
3131 This must include \"<\" and \">\", and should include \",\", and
3132 any character which cannot be valid inside such a construct.
3133 This is used in `c-forward-<>-arglist-recur' to try to detect
3134 sequences of tokens which cannot be a template/generic construct.
3135 When \"(\" is present, that defun will attempt to parse a
3136 parenthesized expression inside the template. When \")\" is
3137 present it will treat an unbalanced closing paren as a sign of
3138 the invalidity of the putative template construct."
3141 (c-lang-defvar c-<>-notable-chars-re (c-lang-const c-<>-notable-chars-re))
3143 (c-lang-defconst c-enums-contain-decls
3144 "Non-nil means that an enum structure can contain declarations."
3147 (c-lang-defvar c-enums-contain-decls (c-lang-const c-enums-contain-decls))
3149 (c-lang-defconst c-recognize-paren-inits
3150 "Non-nil means that parenthesis style initializers exist,
3151 i.e. constructs like
3155 in addition to the more classic
3160 (c-lang-defvar c-recognize-paren-inits (c-lang-const c-recognize-paren-inits))
3162 (c-lang-defconst c-recognize-paren-inexpr-blocks
3163 "Non-nil to recognize gcc style in-expression blocks,
3164 i.e. compound statements surrounded by parentheses inside expressions."
3167 (c-lang-defvar c-recognize-paren-inexpr-blocks
3168 (c-lang-const c-recognize-paren-inexpr-blocks))
3170 (c-lang-defconst c-opt-<>-arglist-start
3171 ;; Regexp matching the start of angle bracket arglists in languages
3172 ;; where `c-recognize-<>-arglists' is set. Does not exclude
3173 ;; keywords outside `c-<>-arglist-kwds'. The first submatch is
3174 ;; assumed to surround the preceding symbol. The whole match is
3175 ;; assumed to end directly after the opening "<".
3176 t (if (c-lang-const c-recognize-<>-arglists)
3178 (c-lang-const c-symbol-key)
3180 (c-lang-const c-syntactic-ws)
3182 (c-lang-defvar c-opt-<>-arglist-start (c-lang-const c-opt-<>-arglist-start))
3184 (c-lang-defconst c-opt-<>-arglist-start-in-paren
3185 ;; Regexp that in addition to `c-opt-<>-arglist-start' matches close
3186 ;; parens. The first submatch is assumed to surround
3187 ;; `c-opt-<>-arglist-start'.
3188 t (if (c-lang-const c-opt-<>-arglist-start)
3190 (c-lang-const c-opt-<>-arglist-start)
3192 (c-lang-defvar c-opt-<>-arglist-start-in-paren
3193 (c-lang-const c-opt-<>-arglist-start-in-paren))
3195 (c-lang-defconst c-opt-postfix-decl-spec-key
3196 ;; Regexp matching the beginning of a declaration specifier in the
3197 ;; region between the header and the body of a declaration.
3199 ;; TODO: This is currently not used uniformly; c++-mode and
3200 ;; java-mode each have their own ways of using it.
3203 (c-lang-const c-simple-ws) "*"
3204 "\\(virtual" (c-lang-const c-simple-ws) "+\\)?\\("
3205 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
3206 "\\)" (c-lang-const c-simple-ws) "+"
3207 "\\(" (c-lang-const c-symbol-key) "\\)")
3208 java (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
3209 (c-lang-defvar c-opt-postfix-decl-spec-key
3210 (c-lang-const c-opt-postfix-decl-spec-key))
3212 (c-lang-defconst c-recognize-colon-labels
3213 "Non-nil if generic labels ending with \":\" should be recognized.
3214 That includes labels in code and access keys in classes. This does
3215 not apply to labels recognized by `c-label-kwds' and
3216 `c-opt-extra-label-key'."
3218 (c c++ objc java pike) t)
3219 (c-lang-defvar c-recognize-colon-labels
3220 (c-lang-const c-recognize-colon-labels))
3222 (c-lang-defconst c-label-prefix-re
3223 "Regexp like `c-decl-prefix-re' that matches any token that can precede
3224 a generic colon label. Not used if `c-recognize-colon-labels' is
3227 (c-lang-defvar c-label-prefix-re
3228 (c-lang-const c-label-prefix-re))
3230 (c-lang-defconst c-nonlabel-token-key
3231 "Regexp matching things that can't occur in generic colon labels,
3232 neither in a statement nor in a declaration context. The regexp is
3233 tested at the beginning of every sexp in a suspected label,
3234 i.e. before \":\". Only used if `c-recognize-colon-labels' is set."
3236 ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
3237 (c-make-keywords-re t
3238 (c--set-difference (c-lang-const c-keywords)
3239 (append (c-lang-const c-label-kwds)
3240 (c-lang-const c-protection-kwds))
3241 :test 'string-equal)))
3242 ;; Don't allow string literals, except in AWK. Character constants are OK.
3243 (c objc java pike idl) (concat "\"\\|"
3244 (c-lang-const c-nonlabel-token-key))
3245 ;; Also check for open parens in C++, to catch member init lists in
3246 ;; constructors. We normally allow it so that macros with arguments
3248 c++ (concat "\\s(\\|\"\\|" (c-lang-const c-nonlabel-token-key)))
3249 (c-lang-defvar c-nonlabel-token-key (c-lang-const c-nonlabel-token-key))
3251 (c-lang-defconst c-nonlabel-token-2-key
3252 "Regexp matching things that can't occur two symbols before a colon in
3253 a label construct. This catches C++'s inheritance construct \"class foo
3254 : bar\". Only used if `c-recognize-colon-labels' is set."
3255 t "\\<\\>" ; matches nothing
3256 c++ (c-make-keywords-re t '("class")))
3257 (c-lang-defvar c-nonlabel-token-2-key (c-lang-const c-nonlabel-token-2-key))
3259 (c-lang-defconst c-opt-extra-label-key
3260 "Optional regexp matching labels.
3261 Normally, labels are detected according to `c-nonlabel-token-key',
3262 `c-decl-prefix-re' and `c-nonlabel-decl-prefix-re'. This regexp can
3263 be used if there are additional labels that aren't recognized that
3266 objc (c-make-keywords-re t (c-lang-const c-protection-kwds)))
3267 (c-lang-defvar c-opt-extra-label-key (c-lang-const c-opt-extra-label-key))
3269 (c-lang-defconst c-opt-friend-key
3270 ;; Regexp describing friend declarations classes, or nil in
3271 ;; languages that don't have such things.
3273 ;; TODO: Ought to use `c-prefix-spec-kwds-re' or similar, and the
3274 ;; template skipping isn't done properly. This will disappear soon.
3276 c++ (concat "friend" (c-lang-const c-simple-ws) "+"
3279 (c-lang-const c-simple-ws) "*"
3281 (c-lang-const c-simple-ws) "*"
3283 (c-lang-const c-simple-ws) "+")))
3284 (c-lang-defvar c-opt-friend-key (c-lang-const c-opt-friend-key))
3286 (c-lang-defconst c-opt-method-key
3287 ;; Special regexp to match the start of Objective-C methods. The
3288 ;; first submatch is assumed to end after the + or - key.
3291 ;; TODO: Ought to use a better method than anchoring on bol.
3294 (c-lang-const c-simple-ws) "*"
3295 (concat "\\(" ; Return type.
3297 (c-lang-const c-simple-ws) "*"
3299 "\\(" (c-lang-const c-symbol-key) "\\)"))
3300 (c-lang-defvar c-opt-method-key (c-lang-const c-opt-method-key))
3302 (c-lang-defconst c-type-decl-end-used
3303 ;; Must be set in buffers where the `c-type' text property might be
3304 ;; used with the value `c-decl-end'.
3306 ;; `c-decl-end' is used to mark the ends of labels and access keys
3307 ;; to make interactive refontification work better.
3308 t (or (c-lang-const c-recognize-colon-labels)
3309 (and (c-lang-const c-label-kwds) t))
3310 ;; `c-decl-end' is used to mark the end of the @-style directives in
3313 (c-lang-defvar c-type-decl-end-used (c-lang-const c-type-decl-end-used))
3315 (c-lang-defconst c-maybe-decl-faces
3316 "List of faces that might be put at the start of a type when
3317 `c-font-lock-declarations' runs. This must be evaluated (with `eval') at
3318 runtime to get the actual list of faces. This ensures that face name
3319 aliases in Emacs are resolved."
3322 c-reference-face-name
3323 font-lock-keyword-face)
3324 java (append (c-lang-const c-maybe-decl-faces)
3325 '(font-lock-preprocessor-face)))
3326 (c-lang-defvar c-maybe-decl-faces (c-lang-const c-maybe-decl-faces))
3329 ;;; Wrap up the `c-lang-defvar' system.
3331 ;; Compile in the list of language variables that has been collected
3332 ;; with the `c-lang-defvar' and `c-lang-setvar' macros. Note that the
3333 ;; first element of each is nil.
3334 (defconst c-lang-variable-inits (cc-eval-when-compile c-lang-variable-inits))
3335 (defconst c-emacs-variable-inits (cc-eval-when-compile c-emacs-variable-inits))
3337 ;; Make the `c-lang-setvar' variables buffer local in the current buffer.
3338 ;; These are typically standard emacs variables such as `comment-start'.
3339 (defmacro c-make-emacs-variables-local ()
3341 ,@(mapcar (lambda (init)
3342 `(make-local-variable ',(car init)))
3343 (cdr c-emacs-variable-inits))))
3345 (defun c-make-init-lang-vars-fun (mode)
3346 "Create a function that initializes all the language dependent variables
3349 This function should be evaluated at compile time, so that the
3350 function it returns is byte compiled with all the evaluated results
3351 from the language constants. Use the `c-init-language-vars' macro to
3352 accomplish that conveniently."
3354 (if (cc-bytecomp-is-compiling)
3355 ;; No need to byte compile this lambda since the byte compiler is
3356 ;; smart enough to detect the `funcall' construct in the
3357 ;; `c-init-language-vars' macro below and compile it all straight
3358 ;; into the function that contains `c-init-language-vars'.
3361 ;; This let sets up the context for `c-mode-var' and similar
3362 ;; that could be in the result from `c--macroexpand-all'.
3363 (let ((c-buffer-is-cc-mode ',mode)
3364 current-var source-eval)
3365 (c-make-emacs-variables-local)
3368 (if (eq c-version-sym ',c-version-sym)
3369 (setq ,@(let ((c-buffer-is-cc-mode mode)
3370 (c-lang-const-expansion 'immediate))
3371 ;; `c-lang-const' will expand to the evaluated
3372 ;; constant immediately in `c--macroexpand-all'
3376 `(current-var ',(car init)
3377 ,(car init) ,(c--macroexpand-all
3379 ;; Note: The following `append' copies the
3380 ;; first argument. That list is small, so
3381 ;; this doesn't matter too much.
3382 (append (cdr c-emacs-variable-inits)
3383 (cdr c-lang-variable-inits)))))
3385 ;; This diagnostic message isn't useful for end
3386 ;; users, so it's disabled.
3387 ;;(unless (get ',mode 'c-has-warned-lang-consts)
3388 ;; (message ,(concat "%s compiled with CC Mode %s "
3389 ;; "but loaded with %s - evaluating "
3390 ;; "language constants from source")
3391 ;; ',mode ,c-version c-version)
3392 ;; (put ',mode 'c-has-warned-lang-consts t))
3394 (setq source-eval t)
3395 (let ((init ',(append (cdr c-emacs-variable-inits)
3396 (cdr c-lang-variable-inits))))
3397 (dolist (var-init init)
3398 (setq current-var (car var-init))
3399 (set (car var-init) (eval (cadr var-init))))))
3403 (message "Eval error in the `c-lang-defvar' or `c-lang-setvar' for `%s'%s: %S"
3407 (fallback source eval - %s compiled with CC Mode %s but loaded with %s)"
3408 ',mode ,c-version c-version)
3411 (signal (car err) (cdr err)))))))
3413 ;; Being evaluated from source. Always use the dynamic method to
3414 ;; work well when `c-lang-defvar's in this file are reevaluated
3418 (let ((c-buffer-is-cc-mode ',mode)
3419 (init (append (cdr c-emacs-variable-inits)
3420 (cdr c-lang-variable-inits)))
3422 (c-make-emacs-variables-local)
3425 (dolist (var-init init)
3426 (setq current-var (car var-init))
3427 (set (car var-init) (eval (cadr var-init))))
3432 "Eval error in the `c-lang-defvar' or `c-lang-setver' for `%s' (source eval): %S"
3434 (signal (car err) (cdr err)))))))
3437 (defmacro c-init-language-vars (mode)
3438 "Initialize all the language dependent variables for the given mode.
3439 This macro is expanded at compile time to a form tailored for the mode
3440 in question, so MODE must be a constant. Therefore MODE is not
3441 evaluated and should not be quoted."
3442 `(funcall ,(c-make-init-lang-vars-fun mode)))
3445 (cc-provide 'cc-langs)
3448 ;; indent-tabs-mode: t
3451 ;;; cc-langs.el ends here