1 ;;; cc-langs.el --- language specific settings for CC Mode
3 ;; Copyright (C) 1985, 1987, 1992-2011 Free Software Foundation, Inc.
5 ;; Authors: 2002- Alan Mackenzie
6 ;; 1998- Martin Stjernholm
7 ;; 1992-1999 Barry A. Warsaw
10 ;; 1985 Richard M. Stallman
11 ;; Maintainer: bug-cc-mode@gnu.org
12 ;; Created: 22-Apr-1997 (split from cc-mode.el)
13 ;; Keywords: c languages
16 ;; This file is part of GNU Emacs.
18 ;; GNU Emacs is free software: you can redistribute it and/or modify
19 ;; it under the terms of the GNU General Public License as published by
20 ;; the Free Software Foundation, either version 3 of the License, or
21 ;; (at your option) any later version.
23 ;; GNU Emacs is distributed in the hope that it will be useful,
24 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
25 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 ;; GNU General Public License for more details.
28 ;; You should have received a copy of the GNU General Public License
29 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
33 ;; HACKERS NOTE: There's heavy macro magic here. If you need to make
34 ;; changes in this or other files containing `c-lang-defconst' but
35 ;; don't want to read through the longer discussion below then read
38 ;; o A change in a `c-lang-defconst' or `c-lang-defvar' will not take
39 ;; effect if the file containing the mode init function (typically
40 ;; cc-mode.el) is byte compiled.
41 ;; o To make changes show in font locking you need to reevaluate the
42 ;; `*-font-lock-keywords-*' constants, which normally is easiest to
43 ;; do with M-x eval-buffer in cc-fonts.el.
44 ;; o In either case it's necessary to reinitialize the mode to make
45 ;; the changes show in an existing buffer.
47 ;;; Introduction to the language dependent variable system:
49 ;; This file contains all the language dependent variables, except
50 ;; those specific for font locking which reside in cc-fonts.el. As
51 ;; far as possible, all the differences between the languages that CC
52 ;; Mode supports are described with these variables only, so that the
53 ;; code can be shared.
55 ;; The language constant system (see cc-defs.el) is used to specify
56 ;; various language dependent info at a high level, such as lists of
57 ;; keywords, and then from them generate - at compile time - the
58 ;; various regexps and other low-level structures actually employed in
59 ;; the code at runtime.
61 ;; This system is also designed to make it easy for developers of
62 ;; derived modes to customize the source constants for new language
63 ;; variants, without having to keep up with the exact regexps etc that
64 ;; are used in each CC Mode version. It's possible from an external
65 ;; package to add a new language by inheriting an existing one, and
66 ;; then change specific constants as necessary for the new language.
67 ;; The old values for those constants (and the values of all the other
68 ;; high-level constants) may be used to build the new ones, and those
69 ;; new values will in turn be used by the low-level definitions here
70 ;; to build the runtime constants appropriately for the new language
71 ;; in the current version of CC Mode.
73 ;; Like elsewhere in CC Mode, the existence of a doc string signifies
74 ;; that a language constant is part of the external API, and that it
75 ;; therefore can be used with a high confidence that it will continue
76 ;; to work with future versions of CC Mode. Even so, it's not
77 ;; unlikely that such constants will change meaning slightly as this
78 ;; system is refined further; a certain degree of dependence on the CC
79 ;; Mode version is unavoidable when hooking in at this level. Also
80 ;; note that there's still work to be done to actually use these
81 ;; constants everywhere inside CC Mode; there are still hardcoded
82 ;; values in many places in the code.
84 ;; Separate packages will also benefit from the compile time
85 ;; evaluation; the byte compiled file(s) for them will contain the
86 ;; compiled runtime constants ready for use by (the byte compiled) CC
87 ;; Mode, and the source definitions in this file don't have to be
88 ;; loaded then. However, if a byte compiled package is loaded that
89 ;; has been compiled with a different version of CC Mode than the one
90 ;; currently loaded, then the compiled-in values will be discarded and
91 ;; new ones will be built when the mode is initialized. That will
92 ;; automatically trig a load of the file(s) containing the source
93 ;; definitions (i.e. this file and/or cc-fonts.el) if necessary.
95 ;; A small example of a derived mode is available at
96 ;; <http://cc-mode.sourceforge.net/derived-mode-ex.el>. It also
97 ;; contains some useful hints for derived mode developers.
99 ;;; Using language variables:
101 ;; The `c-lang-defvar' forms in this file comprise the language
102 ;; variables that CC Mode uses. It does not work to use
103 ;; `c-lang-defvar' anywhere else (which isn't much of a limitation
104 ;; since these variables sole purpose is to interface with the CC Mode
105 ;; core functions). The values in these `c-lang-defvar's are not
106 ;; evaluated right away but instead collected to a single large `setq'
107 ;; that can be inserted for a particular language with the
108 ;; `c-init-language-vars' macro.
110 ;; This file is only required at compile time, or when not running
111 ;; from byte compiled files, or when the source definitions for the
112 ;; language constants are requested.
118 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
122 (if (and (boundp 'byte-compile-dest-file)
123 (stringp byte-compile-dest-file))
124 (cons (file-name-directory byte-compile-dest-file) load-path)
126 (load "cc-bytecomp" nil t)))
128 (cc-require 'cc-defs)
129 (cc-require 'cc-vars)
132 ;; This file is not always loaded. See note above.
133 (cc-external-require 'cl)
136 ;;; Setup for the `c-lang-defvar' system.
139 ;; These are used to collect the init forms from the subsequent
140 ;; `c-lang-defvar' and `c-lang-setvar'. They are used to build the
141 ;; lambda in `c-make-init-lang-vars-fun' below, and to build `defvar's
142 ;; and `make-variable-buffer-local's in cc-engine and
143 ;; `make-local-variable's in `c-init-language-vars-for'.
144 (defvar c-lang-variable-inits nil)
145 (defvar c-lang-variable-inits-tail nil)
146 (setq c-lang-variable-inits (list nil)
147 c-lang-variable-inits-tail c-lang-variable-inits)
148 (defvar c-emacs-variable-inits nil)
149 (defvar c-emacs-variable-inits-tail nil)
150 (setq c-emacs-variable-inits (list nil)
151 c-emacs-variable-inits-tail c-emacs-variable-inits))
153 (defmacro c-lang-defvar (var val &optional doc)
154 "Declares the buffer local variable VAR to get the value VAL. VAL is
155 evaluated and assigned at mode initialization. More precisely, VAL is
156 evaluated and bound to VAR when the result from the macro
157 `c-init-language-vars' is evaluated.
159 `c-lang-const' is typically used in VAL to get the right value for the
160 language being initialized, and such calls will be macro expanded to
161 the evaluated constant value at compile time."
164 (eq (car-safe val) 'c-lang-const)
167 ;; Special case: If there's no docstring and the value is a
168 ;; simple (c-lang-const foo) where foo is the same name as VAR
169 ;; then take the docstring from the language constant foo.
170 (setq doc (get (intern (symbol-name (nth 1 val)) c-lang-constants)
171 'variable-documentation)))
175 (let ((elem (assq var (cdr c-lang-variable-inits))))
177 (setcdr elem (list val doc))
178 (setcdr c-lang-variable-inits-tail (list (list var val doc)))
179 (setq c-lang-variable-inits-tail (cdr c-lang-variable-inits-tail))))
181 ;; Return the symbol, like the other def* forms.
184 (defmacro c-lang-setvar (var val)
185 "Causes the variable VAR to be made buffer local and to get set to the
186 value VAL. VAL is evaluated and assigned at mode initialization. More
187 precisely, VAL is evaluated and bound to VAR when the result from the
188 macro `c-init-language-vars' is evaluated. VAR is typically a standard
189 Emacs variable like `comment-start'.
191 `c-lang-const' is typically used in VAL to get the right value for the
192 language being initialized, and such calls will be macro expanded to
193 the evaluated constant value at compile time."
194 (let ((elem (assq var (cdr c-emacs-variable-inits))))
196 (setcdr elem (list val)) ; Maybe remove "list", sometime. 2006-07-19
197 (setcdr c-emacs-variable-inits-tail (list (list var val)))
198 (setq c-emacs-variable-inits-tail (cdr c-emacs-variable-inits-tail))))
200 ;; Return the symbol, like the other def* forms.
203 (put 'c-lang-defvar 'lisp-indent-function 'defun)
204 ; (eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
206 (def-edebug-spec c-lang-defvar
207 (&define name def-form &optional stringp)) ;)
209 ;; Suppress "might not be defined at runtime" warning.
210 ;; This file is only used when compiling other cc files.
211 (declare-function delete-duplicates "cl-seq" (cl-seq &rest cl-keys))
212 (declare-function mapcan "cl-extra" (cl-func cl-seq &rest cl-rest))
213 (declare-function cl-macroexpand-all "cl-extra" (form &optional env))
216 ;; Some helper functions used when building the language constants.
218 (defun c-filter-ops (ops opgroup-filter op-filter &optional xlate)
219 ;; Extract a subset of the operators in the list OPS in a DWIM:ey
220 ;; way. The return value is a plain list of operators:
222 ;; OPS either has the structure of `c-operators', is a single
223 ;; group in `c-operators', or is a plain list of operators.
225 ;; OPGROUP-FILTER specifies how to select the operator groups. It
226 ;; can be t to choose all groups, a list of group type symbols
227 ;; (such as 'prefix) to accept, or a function which will be called
228 ;; with the group symbol for each group and should return non-nil
229 ;; if that group is to be included.
231 ;; If XLATE is given, it's a function which is called for each
232 ;; matching operator and its return value is collected instead.
233 ;; If it returns a list, the elements are spliced directly into
234 ;; the final result, which is returned as a list with duplicates
235 ;; removed using `equal'.
237 ;; `c-mode-syntax-table' for the current mode is in effect during
238 ;; the whole procedure.
239 (unless (listp (car-safe ops))
240 (setq ops (list ops)))
241 (cond ((eq opgroup-filter t)
242 (setq opgroup-filter (lambda (opgroup) t)))
243 ((not (functionp opgroup-filter))
244 (setq opgroup-filter `(lambda (opgroup)
245 (memq opgroup ',opgroup-filter)))))
246 (cond ((eq op-filter t)
247 (setq op-filter (lambda (op) t)))
249 (setq op-filter `(lambda (op)
250 (string-match ,op-filter op)))))
252 (setq xlate 'identity))
253 (c-with-syntax-table (c-lang-const c-mode-syntax-table)
255 (mapcan (lambda (opgroup)
256 (when (if (symbolp (car opgroup))
257 (when (funcall opgroup-filter (car opgroup))
258 (setq opgroup (cdr opgroup))
262 (when (funcall op-filter op)
263 (let ((res (funcall xlate op)))
264 (if (listp res) res (list res)))))
270 ;;; Various mode specific values that aren't language related.
272 (c-lang-defconst c-mode-menu
273 ;; The definition for the mode menu. The menu title is prepended to
274 ;; this before it's fed to `easy-menu-define'.
275 t `(["Comment Out Region" comment-region
276 (c-fn-region-is-active-p)]
277 ["Uncomment Region" (comment-region (region-beginning)
279 (c-fn-region-is-active-p)]
280 ["Indent Expression" c-indent-exp
281 (memq (char-after) '(?\( ?\[ ?\{))]
282 ["Indent Line or Region" c-indent-line-or-region t]
283 ["Fill Comment Paragraph" c-fill-paragraph t]
285 ["Backward Statement" c-beginning-of-statement t]
286 ["Forward Statement" c-end-of-statement t]
287 ,@(when (c-lang-const c-opt-cpp-prefix)
288 ;; Only applicable if there's a cpp preprocessor.
289 `(["Up Conditional" c-up-conditional t]
290 ["Backward Conditional" c-backward-conditional t]
291 ["Forward Conditional" c-forward-conditional t]
293 ["Macro Expand Region" c-macro-expand
294 (c-fn-region-is-active-p)]
295 ["Backslashify" c-backslash-region
296 (c-fn-region-is-active-p)]))
299 ["Set Style..." c-set-style t]
300 ["Show Current Style Name" (message
302 c-indentation-style) t]
303 ["Guess Style from this Buffer" c-guess-buffer-no-install t]
304 ["Install the Last Guessed Style..." c-guess-install
305 (and c-guess-guessed-offsets-alist
306 c-guess-guessed-basic-offset) ]
307 ["View the Last Guessed Style" c-guess-view
308 (and c-guess-guessed-offsets-alist
309 c-guess-guessed-basic-offset) ])
312 ["Syntactic indentation" c-toggle-syntactic-indentation
313 :style toggle :selected c-syntactic-indentation]
314 ["Electric mode" c-toggle-electric-state
315 :style toggle :selected c-electric-flag]
316 ["Auto newline" c-toggle-auto-newline
317 :style toggle :selected c-auto-newline]
318 ["Hungry delete" c-toggle-hungry-state
319 :style toggle :selected c-hungry-delete-key]
320 ["Subword mode" subword-mode
321 :style toggle :selected (and (boundp 'subword-mode)
327 (defun c-populate-syntax-table (table)
328 "Populate the given syntax table as necessary for a C-like language.
329 This includes setting ' and \" as string delimiters, and setting up
330 the comment syntax to handle both line style \"//\" and block style
331 \"/*\" \"*/\" comments."
333 (modify-syntax-entry ?_ "_" table)
334 (modify-syntax-entry ?\\ "\\" table)
335 (modify-syntax-entry ?+ "." table)
336 (modify-syntax-entry ?- "." table)
337 (modify-syntax-entry ?= "." table)
338 (modify-syntax-entry ?% "." table)
339 (modify-syntax-entry ?< "." table)
340 (modify-syntax-entry ?> "." table)
341 (modify-syntax-entry ?& "." table)
342 (modify-syntax-entry ?| "." table)
343 (modify-syntax-entry ?\' "\"" table)
344 (modify-syntax-entry ?\240 "." table)
346 ;; Set up block and line oriented comments. The new C
347 ;; standard mandates both comment styles even in C, so since
348 ;; all languages now require dual comments, we make this the
352 ((memq '8-bit c-emacs-features)
353 (modify-syntax-entry ?/ ". 1456" table)
354 (modify-syntax-entry ?* ". 23" table))
356 ((memq '1-bit c-emacs-features)
357 (modify-syntax-entry ?/ ". 124b" table)
358 (modify-syntax-entry ?* ". 23" table))
360 (t (error "CC Mode is incompatible with this version of Emacs")))
362 (modify-syntax-entry ?\n "> b" table)
363 ;; Give CR the same syntax as newline, for selective-display
364 (modify-syntax-entry ?\^m "> b" table))
366 (c-lang-defconst c-make-mode-syntax-table
367 "Functions that generates the mode specific syntax tables.
368 The syntax tables aren't stored directly since they're quite large."
370 (let ((table (make-syntax-table)))
371 (c-populate-syntax-table table)
372 ;; Mode specific syntaxes.
373 ,(cond ((or (c-major-mode-is 'objc-mode) (c-major-mode-is 'java-mode))
374 ;; Let '@' be part of symbols in ObjC to cope with
375 ;; its compiler directives as single keyword tokens.
376 ;; This is then necessary since it's assumed that
377 ;; every keyword is a single symbol.
378 `(modify-syntax-entry ?@ "_" table))
379 ((c-major-mode-is 'pike-mode)
380 `(modify-syntax-entry ?@ "." table)))
383 (c-lang-defconst c-mode-syntax-table
384 ;; The syntax tables in evaluated form. Only used temporarily when
385 ;; the constants in this file are evaluated.
386 t (funcall (c-lang-const c-make-mode-syntax-table)))
388 (c-lang-defconst c++-make-template-syntax-table
389 ;; A variant of `c++-mode-syntax-table' that defines `<' and `>' as
390 ;; parenthesis characters. Used temporarily when template argument
391 ;; lists are parsed. Note that this encourages incorrect parsing of
392 ;; templates since they might contain normal operators that uses the
393 ;; '<' and '>' characters. Therefore this syntax table might go
394 ;; away when CC Mode handles templates correctly everywhere.
396 (java c++) `(lambda ()
397 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
398 (modify-syntax-entry ?< "(>" table)
399 (modify-syntax-entry ?> ")<" table)
401 (c-lang-defvar c++-template-syntax-table
402 (and (c-lang-const c++-make-template-syntax-table)
403 (funcall (c-lang-const c++-make-template-syntax-table))))
405 (c-lang-defconst c-no-parens-syntax-table
406 ;; A variant of the standard syntax table which is used to find matching
407 ;; "<"s and ">"s which have been marked as parens using syntax table
408 ;; properties. The other paren characters (e.g. "{", ")" "]") are given a
409 ;; non-paren syntax here. so that the list commands will work on "< ... >"
410 ;; even when there's unbalanced other parens inside them.
412 ;; This variable is nil for languages which don't have template stuff.
414 (if (c-lang-const c-recognize-<>-arglists)
415 (let ((table (funcall ,(c-lang-const c-make-mode-syntax-table))))
416 (modify-syntax-entry ?\( "." table)
417 (modify-syntax-entry ?\) "." table)
418 (modify-syntax-entry ?\[ "." table)
419 (modify-syntax-entry ?\] "." table)
420 (modify-syntax-entry ?\{ "." table)
421 (modify-syntax-entry ?\} "." table)
423 (c-lang-defvar c-no-parens-syntax-table
424 (funcall (c-lang-const c-no-parens-syntax-table)))
426 (c-lang-defconst c-identifier-syntax-modifications
427 "A list that describes the modifications that should be done to the
428 mode syntax table to get a syntax table that matches all identifiers
429 and keywords as words.
431 The list is just like the one used in `font-lock-defaults': Each
432 element is a cons where the car is the character to modify and the cdr
433 the new syntax, as accepted by `modify-syntax-entry'."
434 ;; The $ character is not allowed in most languages (one exception
435 ;; is Java which allows it for legacy reasons) but we still classify
436 ;; it as an identifier character since it's often used in various
437 ;; machine generated identifiers.
438 t '((?_ . "w") (?$ . "w"))
439 (objc java) (append '((?@ . "w"))
440 (c-lang-const c-identifier-syntax-modifications))
442 (c-lang-defvar c-identifier-syntax-modifications
443 (c-lang-const c-identifier-syntax-modifications))
445 (c-lang-defvar c-identifier-syntax-table
446 (let ((table (copy-syntax-table (c-mode-var "mode-syntax-table")))
447 (mods c-identifier-syntax-modifications)
452 (modify-syntax-entry (car mod) (cdr mod) table))
454 "Syntax table built on the mode syntax table but additionally
455 classifies symbol constituents like '_' and '$' as word constituents,
456 so that all identifiers are recognized as words.")
458 (c-lang-defconst c-get-state-before-change-functions
459 ;; For documentation see the following c-lang-defvar of the same name.
460 ;; The value here may be a list of functions or a single function.
462 c++ '(c-extend-region-for-CPP c-before-change-check-<>-operators)
463 (c objc) 'c-extend-region-for-CPP
464 ;; java 'c-before-change-check-<>-operators
465 awk 'c-awk-record-region-clear-NL)
466 (c-lang-defvar c-get-state-before-change-functions
467 (let ((fs (c-lang-const c-get-state-before-change-functions)))
471 "If non-nil, a list of functions called from c-before-change-hook.
472 Typically these will record enough state to allow
473 `c-before-font-lock-function' to extend the region to fontify,
474 and may do such things as removing text-properties which must be
477 These functions will be run in the order given. Each of them
478 takes 2 parameters, the BEG and END supplied to every
479 before-change function; on entry, the buffer will have been
480 widened and match-data will have been saved; point is undefined
481 on both entry and exit; the return value is ignored.
483 The functions are called even when font locking isn't enabled.
485 When the mode is initialized, the functions are called with
486 parameters \(point-min) and \(point-max).")
488 (c-lang-defconst c-before-font-lock-function
489 "If non-nil, a function called just before font locking.
490 Typically it will extend the region about to be fontified \(see
491 below) and will set `syntax-table' text properties on the region.
493 It takes 3 parameters, the BEG, END, and OLD-LEN supplied to
494 every after-change function; point is undefined on both entry and
495 exit; on entry, the buffer will have been widened and match-data
496 will have been saved; the return value is ignored.
498 The function may extend the region to be fontified by setting the
499 buffer local variables c-new-BEG and c-new-END.
501 The function is called even when font locking is disabled.
503 When the mode is initialized, this function is called with
504 parameters \(point-min), \(point-max) and <buffer size>."
506 (c c++ objc) 'c-neutralize-syntax-in-and-mark-CPP
507 awk 'c-awk-extend-and-syntax-tablify-region)
508 (c-lang-defvar c-before-font-lock-function
509 (c-lang-const c-before-font-lock-function))
512 ;;; Syntactic analysis ("virtual semicolons") for line-oriented languages (AWK).
513 (c-lang-defconst c-at-vsemi-p-fn
514 "Contains a function \"Is there a virtual semicolon at POS or point?\".
515 Such a function takes one optional parameter, a buffer position (defaults to
516 point), and returns nil or t. This variable contains nil for languages which
517 don't have EOL terminated statements. "
519 (c c++ objc) 'c-at-macro-vsemi-p
520 awk 'c-awk-at-vsemi-p)
521 (c-lang-defvar c-at-vsemi-p-fn (c-lang-const c-at-vsemi-p-fn))
523 (c-lang-defconst c-vsemi-status-unknown-p-fn
524 "Contains a function \"are we unsure whether there is a virtual semicolon on this line?\".
525 The (admittedly kludgy) purpose of such a function is to prevent an infinite
526 recursion in c-beginning-of-statement-1 when point starts at a `while' token.
527 The function MUST NOT UNDER ANY CIRCUMSTANCES call c-beginning-of-statement-1,
528 even indirectly. This variable contains nil for languages which don't have
529 EOL terminated statements."
531 (c c++ objc) 'c-macro-vsemi-status-unknown-p
532 awk 'c-awk-vsemi-status-unknown-p)
533 (c-lang-defvar c-vsemi-status-unknown-p-fn
534 (c-lang-const c-vsemi-status-unknown-p-fn))
537 ;;; Lexer-level syntax (identifiers, tokens etc).
539 (c-lang-defconst c-has-bitfields
540 "Whether the language has bitfield declarations."
543 (c-lang-defvar c-has-bitfields (c-lang-const c-has-bitfields))
545 (c-lang-defconst c-symbol-start
546 "Regexp that matches the start of a symbol, i.e. any identifier or
547 keyword. It's unspecified how far it matches. Does not contain a \\|
548 operator at the top level."
549 t (concat "[" c-alpha "_]")
550 java (concat "[" c-alpha "_@]")
551 objc (concat "[" c-alpha "@]")
552 pike (concat "[" c-alpha "_`]"))
553 (c-lang-defvar c-symbol-start (c-lang-const c-symbol-start))
555 (c-lang-defconst c-symbol-chars
556 "Set of characters that can be part of a symbol.
557 This is of the form that fits inside [ ] in a regexp."
558 ;; Pike note: With the backquote identifiers this would include most
559 ;; operator chars too, but they are handled with other means instead.
560 t (concat c-alnum "_$")
561 objc (concat c-alnum "_$@"))
562 (c-lang-defvar c-symbol-chars (c-lang-const c-symbol-chars))
564 (c-lang-defconst c-symbol-key
565 "Regexp matching identifiers and keywords (with submatch 0). Assumed
566 to match if `c-symbol-start' matches on the same position."
567 t (concat (c-lang-const c-symbol-start)
568 "[" (c-lang-const c-symbol-chars) "]*")
570 ;; Use the value from C here since the operator backquote is
571 ;; covered by the other alternative.
572 (c-lang-const c-symbol-key c)
574 (c-make-keywords-re nil
575 (c-lang-const c-overloadable-operators))))
576 (c-lang-defvar c-symbol-key (c-lang-const c-symbol-key))
578 (c-lang-defconst c-symbol-key-depth
579 ;; Number of regexp grouping parens in `c-symbol-key'.
580 t (regexp-opt-depth (c-lang-const c-symbol-key)))
582 (c-lang-defconst c-nonsymbol-chars
583 "This is the set of chars that can't be part of a symbol, i.e. the
584 negation of `c-symbol-chars'."
585 t (concat "^" (c-lang-const c-symbol-chars)))
586 (c-lang-defvar c-nonsymbol-chars (c-lang-const c-nonsymbol-chars))
588 (c-lang-defconst c-nonsymbol-key
589 "Regexp that matches any character that can't be part of a symbol.
590 It's usually appended to other regexps to avoid matching a prefix.
591 It's assumed to not contain any submatchers."
592 ;; The same thing regarding Unicode identifiers applies here as to
594 t (concat "[" (c-lang-const c-nonsymbol-chars) "]"))
596 (c-lang-defconst c-identifier-ops
597 "The operators that make up fully qualified identifiers. nil in
598 languages that don't have such things. See `c-operators' for a
599 description of the format. Binary operators can concatenate symbols,
600 e.g. \"::\" in \"A::B::C\". Prefix operators can precede identifiers,
601 e.g. \"~\" in \"~A::B\". Other types of operators aren't supported.
603 This value is by default merged into `c-operators'."
605 c++ '((prefix "~" "??-" "compl")
608 ;; Java has "." to concatenate identifiers but it's also used for
609 ;; normal indexing. There's special code in the Java font lock
610 ;; rules to fontify qualified identifiers based on the standard
611 ;; naming conventions. We still define "." here to make
612 ;; `c-forward-name' move over as long names as possible which is
613 ;; necessary to e.g. handle throws clauses correctly.
614 java '((left-assoc "."))
615 idl '((left-assoc "::")
617 pike '((left-assoc "::")
621 (c-lang-defconst c-opt-identifier-concat-key
622 ;; Appendable adorned regexp matching the operators that join
623 ;; symbols to fully qualified identifiers, or nil in languages that
624 ;; don't have such things.
626 ;; This was a docstring constant in 5.30. It still works but is now
627 ;; considered internal - change `c-identifier-ops' instead.
628 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
629 '(left-assoc right-assoc)
632 (c-make-keywords-re 'appendable ops))))
633 (c-lang-defvar c-opt-identifier-concat-key
634 (c-lang-const c-opt-identifier-concat-key)
637 (c-lang-defconst c-opt-identifier-concat-key-depth
638 ;; Number of regexp grouping parens in `c-opt-identifier-concat-key'.
639 t (regexp-opt-depth (c-lang-const c-opt-identifier-concat-key)))
641 (c-lang-defconst c-opt-identifier-prefix-key
642 ;; Appendable adorned regexp matching operators that might precede
643 ;; an identifier and that are part of the identifier in that case.
644 ;; nil in languages without such things.
645 t (let ((ops (c-filter-ops (c-lang-const c-identifier-ops)
649 (c-make-keywords-re 'appendable ops))))
651 (c-lang-defconst c-after-id-concat-ops
652 "Operators that can occur after a binary operator on `c-identifier-ops'
653 in identifiers. nil in languages that don't have such things.
655 Operators here should also have appropriate entries in `c-operators' -
656 it's not taken care of by default."
658 ;; '~' for destructors in C++, '*' for member pointers.
660 ;; In Java we recognize '*' to deal with "foo.bar.*" that can occur
661 ;; in import declarations. (This will also match bogus things like
662 ;; "foo.*bar" but we don't bother.)
665 (c-lang-defconst c-opt-after-id-concat-key
666 ;; Regexp that must match the token after
667 ;; `c-opt-identifier-concat-key' for it to be considered an
668 ;; identifier concatenation operator (which e.g. causes the
669 ;; preceding identifier to be fontified as a reference). Assumed to
670 ;; be a string if `c-opt-identifier-concat-key' is.
672 ;; This was a docstring constant in 5.30. It still works but is now
673 ;; considered internal - change `c-after-id-concat-ops' instead.
674 t (concat (c-lang-const c-symbol-start)
675 (if (c-lang-const c-after-id-concat-ops)
676 (concat "\\|" (c-make-keywords-re 'appendable
677 (c-lang-const c-after-id-concat-ops)))
680 (c-lang-defconst c-identifier-start
681 "Regexp that matches the start of an (optionally qualified) identifier.
682 It should also match all keywords. It's unspecified how far it
684 t (concat (c-lang-const c-symbol-start)
685 (if (c-lang-const c-opt-identifier-prefix-key)
687 (c-lang-const c-opt-identifier-prefix-key))
689 (c-lang-defvar c-identifier-start (c-lang-const c-identifier-start))
691 (c-lang-defconst c-identifier-key
692 "Regexp matching a fully qualified identifier, like \"A::B::c\" in
693 C++. It does not recognize the full range of syntactic whitespace
694 between the tokens; `c-forward-name' has to be used for that. It
695 should also not match identifiers containing parenthesis groupings,
696 e.g. identifiers with template arguments such as \"A<X,Y>\" in C++."
697 ;; This regexp is more complex than strictly necessary to ensure
698 ;; that it can be matched with a minimum of backtracking.
699 t (concat (if (c-lang-const c-opt-identifier-prefix-key)
702 (c-lang-const c-opt-identifier-prefix-key)
703 (c-lang-const c-simple-ws) "*"
706 "\\(" (c-lang-const c-symbol-key) "\\)"
707 (if (c-lang-const c-opt-identifier-concat-key)
710 (c-lang-const c-simple-ws) "*"
711 (c-lang-const c-opt-identifier-concat-key)
712 (c-lang-const c-simple-ws) "*"
713 (if (c-lang-const c-after-id-concat-ops)
716 (c-make-keywords-re 'appendable
717 (c-lang-const c-after-id-concat-ops))
719 ;; For flexibility, consider the symbol match
720 ;; optional if we've hit a
721 ;; `c-after-id-concat-ops' operator. This is
722 ;; also necessary to handle the "*" that can
723 ;; end import declaration identifiers in Java.
725 (c-lang-const c-simple-ws) "*"
726 "\\(" (c-lang-const c-symbol-key) "\\)"
729 "\\(" (c-lang-const c-symbol-key) "\\)"
731 (concat "\\(" (c-lang-const c-symbol-key) "\\)"))
734 (c-lang-defvar c-identifier-key (c-lang-const c-identifier-key))
736 (c-lang-defconst c-identifier-last-sym-match
737 ;; This was a docstring constant in 5.30 but it's no longer used.
738 ;; It's only kept to avoid breaking third party code.
740 ;; Used to identify the submatch in `c-identifier-key' that
741 ;; surrounds the last symbol in the qualified identifier. It's a
742 ;; list of submatch numbers, of which the first that has a match is
743 ;; taken. It's assumed that at least one does when the regexp has
747 (c-lang-defconst c-string-escaped-newlines
748 "Set if the language support backslash escaped newlines inside string
752 (c-lang-defvar c-string-escaped-newlines
753 (c-lang-const c-string-escaped-newlines))
755 (c-lang-defconst c-multiline-string-start-char
756 "Set if the language supports multiline string literals without escaped
757 newlines. If t, all string literals are multiline. If a character,
758 only literals where the open quote is immediately preceded by that
759 literal are multiline."
762 (c-lang-defvar c-multiline-string-start-char
763 (c-lang-const c-multiline-string-start-char))
765 (c-lang-defconst c-opt-cpp-symbol
766 "The symbol which starts preprocessor constructs when in the margin."
769 (c-lang-defvar c-opt-cpp-symbol (c-lang-const c-opt-cpp-symbol))
771 (c-lang-defconst c-opt-cpp-prefix
772 "Regexp matching the prefix of a cpp directive in the languages that
773 normally use that macro preprocessor. Tested at bol or at boi.
774 Assumed to not contain any submatches or \\| operators."
775 ;; TODO (ACM, 2005-04-01). Amend the following to recognize escaped NLs;
776 ;; amend all uses of c-opt-cpp-prefix which count regexp-depth.
779 (c-lang-defvar c-opt-cpp-prefix (c-lang-const c-opt-cpp-prefix))
781 (c-lang-defconst c-anchored-cpp-prefix
782 "Regexp matching the prefix of a cpp directive anchored to BOL,
783 in the languages that have a macro preprocessor."
784 t (if (c-lang-const c-opt-cpp-prefix)
785 (concat "^" (c-lang-const c-opt-cpp-prefix))))
786 (c-lang-defvar c-anchored-cpp-prefix (c-lang-const c-anchored-cpp-prefix))
788 (c-lang-defconst c-opt-cpp-start
789 "Regexp matching the prefix of a cpp directive including the directive
790 name, or nil in languages without preprocessor support. The first
791 submatch surrounds the directive name."
792 t (if (c-lang-const c-opt-cpp-prefix)
793 (concat (c-lang-const c-opt-cpp-prefix)
794 "\\([" c-alnum "]+\\)"))
795 ;; Pike, being a scripting language, recognizes hash-bangs too.
796 pike (concat (c-lang-const c-opt-cpp-prefix)
797 "\\([" c-alnum "]+\\|!\\)"))
798 (c-lang-defvar c-opt-cpp-start (c-lang-const c-opt-cpp-start))
800 (c-lang-defconst c-cpp-message-directives
801 "List of cpp directives (without the prefix) that are followed by a
803 t (if (c-lang-const c-opt-cpp-prefix)
805 (c c++ objc pike) '("error" "warning"))
807 (c-lang-defconst c-cpp-include-directives
808 "List of cpp directives (without the prefix) that are followed by a
809 file name in angle brackets or quotes."
810 t (if (c-lang-const c-opt-cpp-prefix)
812 objc '("include" "import"))
814 (c-lang-defconst c-opt-cpp-macro-define
815 "Cpp directive (without the prefix) that is followed by a macro
816 definition, or nil if the language doesn't have any."
817 t (if (c-lang-const c-opt-cpp-prefix)
819 (c-lang-defvar c-opt-cpp-macro-define
820 (c-lang-const c-opt-cpp-macro-define))
822 (c-lang-defconst c-opt-cpp-macro-define-start
823 ;; Regexp matching everything up to the macro body of a cpp define, or the
824 ;; end of the logical line if there is none. Submatch 1 is the name of the
825 ;; macro. Set if c-opt-cpp-macro-define is.
826 t (if (c-lang-const c-opt-cpp-macro-define)
827 (concat (c-lang-const c-opt-cpp-prefix)
828 (c-lang-const c-opt-cpp-macro-define)
829 "[ \t]+\\(\\(\\sw\\|_\\)+\\)\\(\([^\)]*\)\\)?"
831 "\\([ \t]\\|\\\\\n\\)*")))
832 (c-lang-defvar c-opt-cpp-macro-define-start
833 (c-lang-const c-opt-cpp-macro-define-start))
835 (c-lang-defconst c-opt-cpp-macro-define-id
836 ;; Regexp matching everything up to the end of the identifier defined
838 t (if (c-lang-const c-opt-cpp-macro-define)
839 (concat (c-lang-const c-opt-cpp-prefix) ; #
840 (c-lang-const c-opt-cpp-macro-define) ; define
841 "[ \t]+\\(\\sw\\|_\\)+")))
842 (c-lang-defvar c-opt-cpp-macro-define-id
843 (c-lang-const c-opt-cpp-macro-define-id))
845 (c-lang-defconst c-cpp-expr-directives
846 "List of cpp directives (without the prefix) that are followed by an
848 t (if (c-lang-const c-opt-cpp-prefix)
851 (c-lang-defconst c-cpp-expr-intro-re
852 "Regexp which matches the start of a CPP directive which contains an
853 expression, or nil if there aren't any in the language."
854 t (if (c-lang-const c-cpp-expr-directives)
856 (c-lang-const c-opt-cpp-prefix)
857 (c-make-keywords-re t (c-lang-const c-cpp-expr-directives)))))
858 (c-lang-defvar c-cpp-expr-intro-re
859 (c-lang-const c-cpp-expr-intro-re))
861 (c-lang-defconst c-cpp-expr-functions
862 "List of functions in cpp expressions."
863 t (if (c-lang-const c-opt-cpp-prefix)
865 pike '("defined" "efun" "constant"))
867 (c-lang-defconst c-assignment-operators
868 "List of all assignment operators."
869 t '("=" "*=" "/=" "%=" "+=" "-=" ">>=" "<<=" "&=" "^=" "|=")
870 java (append (c-lang-const c-assignment-operators)
872 c++ (append (c-lang-const c-assignment-operators)
873 '("and_eq" "or_eq" "xor_eq" "??!=" "??'="))
876 (c-lang-defconst c-operators
877 "List describing all operators, along with their precedence and
878 associativity. The order in the list corresponds to the precedence of
879 the operators: The operators in each element are a group with the same
880 precedence, and the group has higher precedence than the groups in all
881 following elements. The car of each element describes the type of the
882 operator group, and the cdr is a list of the operator tokens in it.
883 The operator group types are:
885 'prefix Unary prefix operators.
886 'postfix Unary postfix operators.
888 Unary postfix operators if and only if the chars have
890 'left-assoc Binary left associative operators (i.e. a+b+c means (a+b)+c).
891 'right-assoc Binary right associative operators (i.e. a=b=c means a=(b=c)).
892 'right-assoc-sequence
893 Right associative operator that constitutes of a
894 sequence of tokens that separate expressions. All the
895 tokens in the group are in this case taken as
896 describing the sequence in one such operator, and the
897 order between them is therefore significant.
899 Operators containing a character with paren syntax are taken to match
900 with a corresponding open/close paren somewhere else. A postfix
901 operator with close paren syntax is taken to end a postfix expression
902 started somewhere earlier, rather than start a new one at point. Vice
903 versa for prefix operators with open paren syntax.
905 Note that operators like \".\" and \"->\" which in language references
906 often are described as postfix operators are considered binary here,
907 since CC Mode treats every identifier as an expression."
909 ;; There's currently no code in CC Mode that exploit all the info
910 ;; in this variable; precedence, associativity etc are present as a
911 ;; preparation for future work.
914 ,@(when (c-lang-const c-opt-cpp-prefix)
916 ,@(when (c-major-mode-is '(c-mode c++-mode))
919 ,@(when (c-major-mode-is '(c-mode c++-mode))
920 '("%:%:" "??=??=")))))
923 ,@(c-lang-const c-identifier-ops)
924 ,@(cond ((or (c-major-mode-is 'c++-mode) (c-major-mode-is 'java-mode))
925 `((postfix-if-paren "<" ">"))) ; Templates.
926 ((c-major-mode-is 'pike-mode)
927 `((prefix "global" "predef")))
928 ((c-major-mode-is 'java-mode)
929 `((prefix "super"))))
932 ,@(when (c-major-mode-is 'c++-mode)
933 ;; The following need special treatment.
934 `((prefix "dynamic_cast" "static_cast"
935 "reinterpret_cast" "const_cast" "typeid")))
937 ,@(unless (c-major-mode-is 'java-mode)
939 (postfix "++" "--" "[" "]" "(" ")"
940 ,@(when (c-major-mode-is '(c-mode c++-mode))
941 '("<:" ":>" "??(" "??)")))
944 (prefix "++" "--" "+" "-" "!" "~"
945 ,@(when (c-major-mode-is 'c++-mode) '("not" "compl"))
946 ,@(when (c-major-mode-is '(c-mode c++-mode))
947 '("*" "&" "sizeof" "??-"))
948 ,@(when (c-major-mode-is 'objc-mode)
949 '("@selector" "@protocol" "@encode"))
950 ;; The following need special treatment.
951 ,@(cond ((c-major-mode-is 'c++-mode)
953 ((c-major-mode-is 'java-mode)
955 ((c-major-mode-is 'pike-mode)
956 '("class" "lambda" "catch" "throw" "gauge")))
958 ,@(when (c-major-mode-is 'pike-mode)
959 '("[" "]"))) ; Type cast.
962 ,@(when (c-major-mode-is 'c++-mode)
963 `((left-assoc ".*" "->*")))
966 (left-assoc "*" "/" "%")
972 (left-assoc "<<" ">>"
973 ,@(when (c-major-mode-is 'java-mode)
977 (left-assoc "<" ">" "<=" ">="
978 ,@(when (c-major-mode-is 'java-mode)
982 (left-assoc "==" "!="
983 ,@(when (c-major-mode-is 'c++-mode) '("not_eq")))
987 ,@(when (c-major-mode-is 'c++-mode) '("bitand")))
989 ;; Bitwise exclusive or.
991 ,@(when (c-major-mode-is '(c-mode c++-mode))
993 ,@(when (c-major-mode-is 'c++-mode) '("xor")))
997 ,@(when (c-major-mode-is '(c-mode c++-mode))
999 ,@(when (c-major-mode-is 'c++-mode) '("bitor")))
1003 ,@(when (c-major-mode-is 'c++-mode) '("and")))
1007 ,@(when (c-major-mode-is '(c-mode c++-mode))
1009 ,@(when (c-major-mode-is 'c++-mode) '("or")))
1012 (right-assoc-sequence "?" ":")
1015 (right-assoc ,@(c-lang-const c-assignment-operators))
1018 ,@(when (c-major-mode-is 'c++-mode)
1019 '((prefix "throw")))
1024 ;; IDL got its own definition since it has a much smaller operator
1025 ;; set than the other languages.
1026 idl `(;; Preprocessor.
1030 ,@(c-lang-const c-identifier-ops)
1032 (prefix "+" "-" "~")
1034 (left-assoc "*" "/" "%")
1036 (left-assoc "+" "-")
1038 (left-assoc "<<" ">>")
1046 (c-lang-defconst c-operator-list
1047 ;; The operators as a flat list (without duplicates).
1048 t (c-filter-ops (c-lang-const c-operators) t t))
1050 (c-lang-defconst c-overloadable-operators
1051 "List of the operators that are overloadable, in their \"identifier
1052 form\". See also `c-op-identifier-prefix'."
1054 c++ '("new" "delete" ;; Can be followed by "[]" but we ignore that.
1056 "^" "??'" "xor" "&" "bitand" "|" "??!" "bitor" "~" "??-" "compl"
1057 "!" "=" "<" ">" "+=" "-=" "*=" "/=" "%=" "^="
1058 "??'=" "xor_eq" "&=" "and_eq" "|=" "??!=" "or_eq"
1059 "<<" ">>" ">>=" "<<=" "==" "!=" "not_eq" "<=" ">="
1060 "&&" "and" "||" "??!??!" "or" "++" "--" "," "->*" "->"
1061 "()" "[]" "<::>" "??(??)")
1062 ;; These work like identifiers in Pike.
1063 pike '("`+" "`-" "`&" "`|" "`^" "`<<" "`>>" "`*" "`/" "`%" "`~"
1064 "`==" "`<" "`>" "`!" "`[]" "`[]=" "`->" "`->=" "`()" "``+"
1065 "``-" "``&" "``|" "``^" "``<<" "``>>" "``*" "``/" "``%"
1068 (c-lang-defconst c-overloadable-operators-regexp
1069 ;; Regexp tested after an "operator" token in C++.
1071 c++ (c-make-keywords-re nil (c-lang-const c-overloadable-operators)))
1072 (c-lang-defvar c-overloadable-operators-regexp
1073 (c-lang-const c-overloadable-operators-regexp))
1075 (c-lang-defconst c-opt-op-identifier-prefix
1076 "Regexp matching the token before the ones in
1077 `c-overloadable-operators' when operators are specified in their
1078 \"identifier form\". This typically matches \"operator\" in C++ where
1079 operator functions are specified as e.g. \"operator +\". It's nil in
1080 languages without operator functions or where the complete operator
1081 identifier is listed in `c-overloadable-operators'.
1083 This regexp is assumed to not match any non-operator identifier."
1085 c++ (c-make-keywords-re t '("operator")))
1086 (c-lang-defvar c-opt-op-identifier-prefix
1087 (c-lang-const c-opt-op-identifier-prefix))
1089 ;; Note: the following alias is an old name which was a mis-spelling. It has
1090 ;; been corrected above and throughout cc-engine.el. It will be removed at
1091 ;; some release very shortly in the future. ACM, 2006-04-14.
1092 (defvaralias 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix)
1093 (make-obsolete-variable 'c-opt-op-identitier-prefix 'c-opt-op-identifier-prefix
1094 "CC Mode 5.31.4, 2006-04-14")
1096 (c-lang-defconst c-other-op-syntax-tokens
1097 "List of the tokens made up of characters in the punctuation or
1098 parenthesis syntax classes that have uses other than as expression
1100 t '("{" "}" "(" ")" "[" "]" ";" ":" "," "=" "/*" "*/" "//")
1101 (c c++ pike) (append '("#" "##" ; Used by cpp.
1103 (c-lang-const c-other-op-syntax-tokens))
1104 (c c++) (append '("*") (c-lang-const c-other-op-syntax-tokens))
1105 c++ (append '("&" "<%" "%>" "<:" ":>" "%:" "%:%:")
1106 (c-lang-const c-other-op-syntax-tokens))
1107 objc (append '("#" "##" ; Used by cpp.
1108 "+" "-") (c-lang-const c-other-op-syntax-tokens))
1109 idl (append '("#" "##") ; Used by cpp.
1110 (c-lang-const c-other-op-syntax-tokens))
1111 pike (append '("..")
1112 (c-lang-const c-other-op-syntax-tokens)
1113 (c-lang-const c-overloadable-operators))
1114 awk '("{" "}" "(" ")" "[" "]" ";" "," "=" "/"))
1116 (c-lang-defconst c-all-op-syntax-tokens
1117 ;; List of all tokens in the punctuation and parenthesis syntax
1119 t (delete-duplicates (append (c-lang-const c-other-op-syntax-tokens)
1120 (c-lang-const c-operator-list))
1121 :test 'string-equal))
1123 (c-lang-defconst c-nonsymbol-token-char-list
1124 ;; List containing all chars not in the word, symbol or
1125 ;; syntactically irrelevant syntax classes, i.e. all punctuation,
1126 ;; parenthesis and string delimiter chars.
1127 t (c-with-syntax-table (c-lang-const c-mode-syntax-table)
1128 ;; Only go through the chars in the printable ASCII range. No
1129 ;; language so far has 8-bit or widestring operators.
1130 (let (list (char 32))
1132 (or (memq (char-syntax char) '(?w ?_ ?< ?> ?\ ))
1133 (setq list (cons (c-int-to-char char) list)))
1134 (setq char (1+ char)))
1137 (c-lang-defconst c-nonsymbol-token-regexp
1138 ;; Regexp matching all tokens in the punctuation and parenthesis
1139 ;; syntax classes. Note that this also matches ".", which can start
1141 t (c-make-keywords-re nil
1142 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1144 "\\`\\(\\s.\\|\\s\(\\|\\s\)\\)+\\'")))
1145 (c-lang-defvar c-nonsymbol-token-regexp
1146 (c-lang-const c-nonsymbol-token-regexp))
1148 (c-lang-defconst c-assignment-op-regexp
1149 ;; Regexp matching all assignment operators and only them. The
1150 ;; beginning of the first submatch is used to detect the end of the
1151 ;; token, along with the end of the whole match.
1152 t (if (c-lang-const c-assignment-operators)
1154 ;; Need special case for "=" since it's a prefix of "==".
1157 (c-make-keywords-re nil
1158 (set-difference (c-lang-const c-assignment-operators)
1160 :test 'string-equal)))
1162 (c-lang-defvar c-assignment-op-regexp
1163 (c-lang-const c-assignment-op-regexp))
1165 (c-lang-defconst c-<>-multichar-token-regexp
1166 ;; Regexp matching all tokens containing "<" or ">" which are longer
1168 t (c-make-keywords-re nil
1169 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1172 (c-lang-defvar c-<>-multichar-token-regexp
1173 (c-lang-const c-<>-multichar-token-regexp))
1175 (c-lang-defconst c-<-op-cont-regexp
1176 ;; Regexp matching the second and subsequent characters of all
1177 ;; multicharacter tokens that begin with "<".
1178 t (c-make-keywords-re nil
1179 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1182 (lambda (op) (substring op 1)))))
1184 (c-lang-defvar c-<-op-cont-regexp (c-lang-const c-<-op-cont-regexp))
1186 (c-lang-defconst c->-op-cont-regexp
1187 ;; Regexp matching the second and subsequent characters of all
1188 ;; multicharacter tokens that begin with ">".
1189 t (c-make-keywords-re nil
1190 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1193 (lambda (op) (substring op 1))))
1194 java (c-make-keywords-re nil
1195 (c-filter-ops (c-lang-const c-all-op-syntax-tokens)
1197 "\\`>[^>]\\|\\`>>[^>]"
1198 (lambda (op) (substring op 1)))))
1200 (c-lang-defvar c->-op-cont-regexp (c-lang-const c->-op-cont-regexp))
1202 (c-lang-defconst c-stmt-delim-chars
1203 ;; The characters that should be considered to bound statements. To
1204 ;; optimize `c-crosses-statement-barrier-p' somewhat, it's assumed to
1205 ;; begin with "^" to negate the set. If ? : operators should be
1206 ;; detected then the string must end with "?:".
1208 (c-lang-defvar c-stmt-delim-chars (c-lang-const c-stmt-delim-chars))
1210 (c-lang-defconst c-stmt-delim-chars-with-comma
1211 ;; Variant of `c-stmt-delim-chars' that additionally contains ','.
1213 (c-lang-defvar c-stmt-delim-chars-with-comma
1214 (c-lang-const c-stmt-delim-chars-with-comma))
1217 ;;; Syntactic whitespace.
1219 (c-lang-defconst c-simple-ws
1220 "Regexp matching an ordinary whitespace character.
1221 Does not contain a \\| operator at the top level."
1222 ;; "\\s " is not enough since it doesn't match line breaks.
1223 t "\\(\\s \\|[\n\r]\\)")
1225 (c-lang-defconst c-simple-ws-depth
1226 ;; Number of regexp grouping parens in `c-simple-ws'.
1227 t (regexp-opt-depth (c-lang-const c-simple-ws)))
1229 (c-lang-defconst c-line-comment-starter
1230 "String that starts line comments, or nil if such don't exist.
1231 Line comments are always terminated by newlines. At least one of
1232 `c-block-comment-starter' and this one is assumed to be set.
1234 Note that it's currently not enough to set this to support a new
1235 comment style. Other stuff like the syntax table must also be set up
1239 (c-lang-defvar c-line-comment-starter (c-lang-const c-line-comment-starter))
1241 (c-lang-defconst c-block-comment-starter
1242 "String that starts block comments, or nil if such don't exist.
1243 Block comments are ended by `c-block-comment-ender', which is assumed
1244 to be set if this is. At least one of `c-line-comment-starter' and
1245 this one is assumed to be set.
1247 Note that it's currently not enough to set this to support a new
1248 comment style. Other stuff like the syntax table must also be set up
1253 (c-lang-defconst c-block-comment-ender
1254 "String that ends block comments, or nil if such don't exist.
1256 Note that it's currently not enough to set this to support a new
1257 comment style. Other stuff like the syntax table must also be set up
1262 (c-lang-defconst c-comment-start-regexp
1263 ;; Regexp to match the start of any type of comment.
1264 t (let ((re (c-make-keywords-re nil
1265 (list (c-lang-const c-line-comment-starter)
1266 (c-lang-const c-block-comment-starter)))))
1267 (if (memq 'gen-comment-delim c-emacs-features)
1268 (concat re "\\|\\s!")
1270 (c-lang-defvar c-comment-start-regexp (c-lang-const c-comment-start-regexp))
1272 (c-lang-defconst c-block-comment-start-regexp
1273 ;; Regexp which matches the start of a block comment (if such exists in the
1275 t (if (c-lang-const c-block-comment-starter)
1276 (regexp-quote (c-lang-const c-block-comment-starter))
1278 (c-lang-defvar c-block-comment-start-regexp
1279 (c-lang-const c-block-comment-start-regexp))
1281 (c-lang-defconst c-line-comment-start-regexp
1282 ;; Regexp which matches the start of a line comment (if such exists in the
1283 ;; language; it does in all 7 CC Mode languages).
1284 t (if (c-lang-const c-line-comment-starter)
1285 (regexp-quote (c-lang-const c-line-comment-starter))
1287 (c-lang-defvar c-line-comment-start-regexp
1288 (c-lang-const c-line-comment-start-regexp))
1290 (c-lang-defconst c-literal-start-regexp
1291 ;; Regexp to match the start of comments and string literals.
1292 t (concat (c-lang-const c-comment-start-regexp)
1294 (if (memq 'gen-string-delim c-emacs-features)
1297 (c-lang-defvar c-literal-start-regexp (c-lang-const c-literal-start-regexp))
1299 (c-lang-defconst c-doc-comment-start-regexp
1300 "Regexp to match the start of documentation comments."
1302 ;; From font-lock.el: `doxygen' uses /*! while others use /**.
1303 (c c++ objc) "/\\*[*!]"
1306 (c-lang-defvar c-doc-comment-start-regexp
1307 (c-lang-const c-doc-comment-start-regexp))
1309 (c-lang-defconst comment-start
1310 "String that starts comments inserted with M-; etc.
1311 `comment-start' is initialized from this."
1312 ;; Default: Prefer line comments to block comments, and pad with a space.
1313 t (concat (or (c-lang-const c-line-comment-starter)
1314 (c-lang-const c-block-comment-starter))
1316 ;; In C we still default to the block comment style since line
1317 ;; comments aren't entirely portable.
1319 (c-lang-setvar comment-start (c-lang-const comment-start))
1321 (c-lang-defconst comment-end
1322 "String that ends comments inserted with M-; etc.
1323 `comment-end' is initialized from this."
1324 ;; Default: Use block comment style if comment-start uses block
1325 ;; comments, and pad with a space in that case.
1326 t (if (string-match (concat "\\`\\("
1327 (c-lang-const c-block-comment-start-regexp)
1329 (c-lang-const comment-start))
1330 (concat " " (c-lang-const c-block-comment-ender))
1332 (c-lang-setvar comment-end (c-lang-const comment-end))
1334 (c-lang-defconst comment-start-skip
1335 "Regexp to match the start of a comment plus everything up to its body.
1336 `comment-start-skip' is initialized from this."
1337 ;; Default: Allow the last char of the comment starter(s) to be
1338 ;; repeated, then allow any amount of horizontal whitespace.
1341 (mapcar (lambda (cs)
1343 (concat (regexp-quote cs) "+")))
1344 (list (c-lang-const c-line-comment-starter)
1345 (c-lang-const c-block-comment-starter)))
1348 (c-lang-setvar comment-start-skip (c-lang-const comment-start-skip))
1350 (c-lang-defconst c-syntactic-ws-start
1351 ;; Regexp matching any sequence that can start syntactic whitespace.
1352 ;; The only uncertain case is '#' when there are cpp directives.
1354 (c-make-keywords-re nil
1355 (append (list (c-lang-const c-line-comment-starter)
1356 (c-lang-const c-block-comment-starter)
1357 (when (c-lang-const c-opt-cpp-prefix)
1361 (when (memq 'gen-comment-delim c-emacs-features)
1363 (c-lang-defvar c-syntactic-ws-start (c-lang-const c-syntactic-ws-start))
1365 (c-lang-defconst c-syntactic-ws-end
1366 ;; Regexp matching any single character that might end syntactic whitespace.
1368 (c-make-keywords-re nil
1369 (append (when (c-lang-const c-block-comment-ender)
1372 (elt (c-lang-const c-block-comment-ender)
1374 (c-lang-const c-block-comment-ender)))))))
1376 (when (memq 'gen-comment-delim c-emacs-features)
1378 (c-lang-defvar c-syntactic-ws-end (c-lang-const c-syntactic-ws-end))
1380 (c-lang-defconst c-unterminated-block-comment-regexp
1381 ;; Regexp matching an unterminated block comment that doesn't
1382 ;; contain line breaks, or nil in languages without block comments.
1383 ;; Does not contain a \| operator at the top level.
1384 t (when (c-lang-const c-block-comment-starter)
1386 (regexp-quote (c-lang-const c-block-comment-starter))
1387 ;; It's messy to cook together a regexp that matches anything
1388 ;; but c-block-comment-ender.
1389 (let ((end (c-lang-const c-block-comment-ender)))
1390 (cond ((= (length end) 1)
1391 (concat "[^" end "\n\r]*"))
1393 (concat "[^" (substring end 0 1) "\n\r]*"
1395 (regexp-quote (substring end 0 1)) "+"
1397 ;; The quoting rules inside char classes are silly. :P
1398 (cond ((= (elt end 0) (elt end 1))
1399 (concat (substring end 0 1) "\n\r"))
1400 ((= (elt end 1) ?\])
1401 (concat (substring end 1 2) "\n\r"
1402 (substring end 0 1)))
1404 (concat (substring end 0 1) "\n\r"
1405 (substring end 1 2))))
1407 "[^" (substring end 0 1) "\n\r]*"
1410 (error "Can't handle a block comment ender of length %s"
1413 (c-lang-defconst c-block-comment-regexp
1414 ;; Regexp matching a block comment that doesn't contain line breaks,
1415 ;; or nil in languages without block comments. The reason we don't
1416 ;; allow line breaks is to avoid going very far and risk running out
1417 ;; of regexp stack; this regexp is intended to handle only short
1418 ;; comments that might be put in the middle of limited constructs
1419 ;; like declarations. Does not contain a \| operator at the top
1421 t (when (c-lang-const c-unterminated-block-comment-regexp)
1423 (c-lang-const c-unterminated-block-comment-regexp)
1424 (let ((end (c-lang-const c-block-comment-ender)))
1425 (cond ((= (length end) 1)
1428 (concat (regexp-quote (substring end 0 1)) "+"
1429 (regexp-quote (substring end 1 2))))
1431 (error "Can't handle a block comment ender of length %s"
1434 (c-lang-defconst c-nonwhite-syntactic-ws
1435 ;; Regexp matching a piece of syntactic whitespace that isn't a
1436 ;; sequence of simple whitespace characters. As opposed to
1437 ;; `c-(forward|backward)-syntactic-ws', this doesn't regard cpp
1438 ;; directives as syntactic whitespace.
1439 t (c-concat-separated
1440 (list (when (c-lang-const c-line-comment-starter)
1441 (concat (regexp-quote (c-lang-const c-line-comment-starter))
1443 (c-lang-const c-block-comment-regexp)
1445 (when (memq 'gen-comment-delim c-emacs-features)
1449 (c-lang-defconst c-syntactic-ws
1450 ;; Regexp matching syntactic whitespace, including possibly the
1451 ;; empty string. As opposed to `c-(forward|backward)-syntactic-ws',
1452 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1453 ;; not contain a \| operator at the top level.
1454 t (concat (c-lang-const c-simple-ws) "*"
1456 (concat "\\(" (c-lang-const c-nonwhite-syntactic-ws) "\\)"
1457 (c-lang-const c-simple-ws) "*")
1460 (c-lang-defconst c-syntactic-ws-depth
1461 ;; Number of regexp grouping parens in `c-syntactic-ws'.
1462 t (regexp-opt-depth (c-lang-const c-syntactic-ws)))
1464 (c-lang-defconst c-nonempty-syntactic-ws
1465 ;; Regexp matching syntactic whitespace, which is at least one
1466 ;; character long. As opposed to `c-(forward|backward)-syntactic-ws',
1467 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1468 ;; not contain a \| operator at the top level.
1470 (c-lang-const c-simple-ws)
1472 (c-lang-const c-nonwhite-syntactic-ws)
1475 (c-lang-defconst c-nonempty-syntactic-ws-depth
1476 ;; Number of regexp grouping parens in `c-nonempty-syntactic-ws'.
1477 t (regexp-opt-depth (c-lang-const c-nonempty-syntactic-ws)))
1479 (c-lang-defconst c-single-line-syntactic-ws
1480 ;; Regexp matching syntactic whitespace without any line breaks. As
1481 ;; opposed to `c-(forward|backward)-syntactic-ws', this doesn't
1482 ;; regard cpp directives as syntactic whitespace. Does not contain
1483 ;; a \| operator at the top level.
1484 t (if (c-lang-const c-block-comment-regexp)
1486 (c-lang-const c-block-comment-regexp)
1490 (c-lang-defconst c-single-line-syntactic-ws-depth
1491 ;; Number of regexp grouping parens in `c-single-line-syntactic-ws'.
1492 t (regexp-opt-depth (c-lang-const c-single-line-syntactic-ws)))
1494 (c-lang-defconst c-syntactic-eol
1495 ;; Regexp that matches when there is no syntactically significant
1496 ;; text before eol. Macros are regarded as syntactically
1497 ;; significant text here.
1498 t (concat (c-lang-const c-single-line-syntactic-ws)
1499 ;; Match eol (possibly inside a block comment or preceded
1500 ;; by a line continuation backslash), or the beginning of a
1501 ;; line comment. Note: This has to be modified for awk
1502 ;; where line comments start with '#'.
1505 (list (when (c-lang-const c-line-comment-starter)
1506 (regexp-quote (c-lang-const c-line-comment-starter)))
1507 (when (c-lang-const c-unterminated-block-comment-regexp)
1508 (concat (c-lang-const c-unterminated-block-comment-regexp)
1514 (c-lang-defvar c-syntactic-eol (c-lang-const c-syntactic-eol))
1519 ;; The Emacs variables beginning-of-defun-function and
1520 ;; end-of-defun-function will be set so that commands like
1521 ;; `mark-defun' and `narrow-to-defun' work right. The key sequences
1522 ;; C-M-a and C-M-e are, however, bound directly to the CC Mode
1523 ;; functions, allowing optimization for large n.
1524 (c-lang-defconst beginning-of-defun-function
1525 "Function to which beginning-of-defun-function will be set."
1526 t 'c-beginning-of-defun
1527 awk 'c-awk-beginning-of-defun)
1528 (c-lang-setvar beginning-of-defun-function
1529 (c-lang-const beginning-of-defun-function))
1531 (c-lang-defconst end-of-defun-function
1532 "Function to which end-of-defun-function will be set."
1534 awk 'c-awk-end-of-defun)
1535 (c-lang-setvar end-of-defun-function (c-lang-const end-of-defun-function))
1537 ;;; In-comment text handling.
1539 (c-lang-defconst c-paragraph-start
1540 "Regexp to append to `paragraph-start'."
1542 java "\\(@[a-zA-Z]+\\>\\|$\\)" ; For Javadoc.
1543 pike "\\(@[a-zA-Z_-]+\\>\\([^{]\\|$\\)\\|$\\)") ; For Pike refdoc.
1544 (c-lang-defvar c-paragraph-start (c-lang-const c-paragraph-start))
1546 (c-lang-defconst c-paragraph-separate
1547 "Regexp to append to `paragraph-separate'."
1549 pike (c-lang-const c-paragraph-start))
1550 (c-lang-defvar c-paragraph-separate (c-lang-const c-paragraph-separate))
1555 ;; Note: All and only all language constants containing keyword lists
1556 ;; should end with "-kwds"; they're automatically collected into the
1557 ;; `c-kwds-lang-consts' list below and used to build `c-keywords' etc.
1559 (c-lang-defconst c-primitive-type-kwds
1560 "Primitive type keywords. As opposed to the other keyword lists, the
1561 keywords listed here are fontified with the type face instead of the
1564 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1565 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1566 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1569 Do not try to modify this list for end user customizations; the
1570 `*-font-lock-extra-types' variable, where `*' is the mode prefix, is
1571 the appropriate place for that."
1572 t '("char" "double" "float" "int" "long" "short" "signed"
1575 '("_Bool" "_Complex" "_Imaginary") ; Conditionally defined in C99.
1576 (c-lang-const c-primitive-type-kwds))
1579 (c-lang-const c-primitive-type-kwds))
1580 ;; Objective-C extends C, but probably not the new stuff in C99.
1582 '("id" "Class" "SEL" "IMP" "BOOL")
1583 (c-lang-const c-primitive-type-kwds))
1584 java '("boolean" "byte" "char" "double" "float" "int" "long" "short" "void")
1585 idl '("Object" "ValueBase" "any" "boolean" "char" "double" "fixed" "float"
1586 "long" "octet" "sequence" "short" "string" "void" "wchar" "wstring"
1589 ;; The following can't really end a type, but we have to specify them
1590 ;; here due to the assumption in `c-primitive-type-prefix-kwds'. It
1591 ;; doesn't matter that much.
1592 "unsigned" "strong")
1593 pike '(;; this_program isn't really a keyword, but it's practically
1594 ;; used as a builtin type.
1595 "array" "float" "function" "int" "mapping" "mixed" "multiset"
1596 "object" "program" "string" "this_program" "void"))
1598 (c-lang-defconst c-primitive-type-key
1599 ;; An adorned regexp that matches `c-primitive-type-kwds'.
1600 t (c-make-keywords-re t (c-lang-const c-primitive-type-kwds)))
1601 (c-lang-defvar c-primitive-type-key (c-lang-const c-primitive-type-key))
1603 (c-lang-defconst c-primitive-type-prefix-kwds
1604 "Keywords that might act as prefixes for primitive types. Assumed to
1605 be a subset of `c-primitive-type-kwds'."
1607 (c c++) '("long" "short" "signed" "unsigned")
1608 idl '("long" "unsigned"
1612 (c-lang-defconst c-typedef-kwds
1613 "Prefix keyword\(s\) like \"typedef\" which make a type declaration out
1614 of a variable declaration."
1618 (c-lang-defconst c-typedef-key
1619 ;; Adorned regexp matching `c-typedef-kwds'.
1620 t (c-make-keywords-re t (c-lang-const c-typedef-kwds)))
1621 (c-lang-defvar c-typedef-key (c-lang-const c-typedef-key))
1623 (c-lang-defconst c-type-prefix-kwds
1624 "Keywords where the following name - if any - is a type name, and
1625 where the keyword together with the symbol works as a type in
1628 Note that an alternative if the second part doesn't hold is
1629 `c-type-list-kwds'. Keywords on this list are typically also present
1630 on one of the `*-decl-kwds' lists."
1632 c '("struct" "union" "enum")
1633 c++ (append '("class" "typename")
1634 (c-lang-const c-type-prefix-kwds c)))
1636 (c-lang-defconst c-type-prefix-key
1637 ;; Adorned regexp matching `c-type-prefix-kwds'.
1638 t (c-make-keywords-re t (c-lang-const c-type-prefix-kwds)))
1639 (c-lang-defvar c-type-prefix-key (c-lang-const c-type-prefix-key))
1641 (c-lang-defconst c-type-modifier-kwds
1642 "Type modifier keywords. These can occur almost anywhere in types
1643 but they don't build a type of themselves. Unlike the keywords on
1644 `c-primitive-type-kwds', they are fontified with the keyword face and
1647 c '("const" "restrict" "volatile")
1648 c++ '("const" "volatile" "throw")
1649 objc '("const" "volatile"))
1651 (c-lang-defconst c-opt-type-modifier-key
1652 ;; Adorned regexp matching `c-type-modifier-kwds', or nil in
1653 ;; languages without such keywords.
1654 t (and (c-lang-const c-type-modifier-kwds)
1655 (c-make-keywords-re t (c-lang-const c-type-modifier-kwds))))
1656 (c-lang-defvar c-opt-type-modifier-key (c-lang-const c-opt-type-modifier-key))
1658 (c-lang-defconst c-opt-type-component-key
1659 ;; An adorned regexp that matches `c-primitive-type-prefix-kwds' and
1660 ;; `c-type-modifier-kwds', or nil in languages without any of them.
1661 t (and (or (c-lang-const c-primitive-type-prefix-kwds)
1662 (c-lang-const c-type-modifier-kwds))
1663 (c-make-keywords-re t
1664 (append (c-lang-const c-primitive-type-prefix-kwds)
1665 (c-lang-const c-type-modifier-kwds)))))
1666 (c-lang-defvar c-opt-type-component-key
1667 (c-lang-const c-opt-type-component-key))
1669 (c-lang-defconst c-type-start-kwds
1670 ;; All keywords that can start a type (i.e. are either a type prefix
1671 ;; or a complete type).
1672 t (delete-duplicates (append (c-lang-const c-primitive-type-kwds)
1673 (c-lang-const c-type-prefix-kwds)
1674 (c-lang-const c-type-modifier-kwds))
1675 :test 'string-equal))
1677 (c-lang-defconst c-class-decl-kwds
1678 "Keywords introducing declarations where the following block (if any)
1679 contains another declaration level that should be considered a class.
1681 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1682 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1683 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1686 Note that presence on this list does not automatically treat the
1687 following identifier as a type; the keyword must also be present on
1688 `c-type-prefix-kwds' or `c-type-list-kwds' to accomplish that."
1690 c '("struct" "union")
1691 c++ '("class" "struct" "union")
1692 objc '("struct" "union"
1693 "@interface" "@implementation" "@protocol")
1694 java '("class" "@interface" "interface")
1695 idl '("component" "eventtype" "exception" "home" "interface" "struct"
1698 "storagehome" "storagetype"
1700 "catalog" "executor" "manages" "segment")
1703 (c-lang-defconst c-class-key
1704 ;; Regexp matching the start of a class.
1705 t (c-make-keywords-re t (c-lang-const c-class-decl-kwds)))
1706 (c-lang-defvar c-class-key (c-lang-const c-class-key))
1708 (c-lang-defconst c-brace-list-decl-kwds
1709 "Keywords introducing declarations where the following block (if
1710 any) is a brace list.
1712 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1713 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1714 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1719 (c-lang-defconst c-brace-list-key
1720 ;; Regexp matching the start of declarations where the following
1721 ;; block is a brace list.
1722 t (c-make-keywords-re t (c-lang-const c-brace-list-decl-kwds)))
1723 (c-lang-defvar c-brace-list-key (c-lang-const c-brace-list-key))
1725 (c-lang-defconst c-other-block-decl-kwds
1726 "Keywords where the following block (if any) contains another
1727 declaration level that should not be considered a class. For every
1728 keyword here, CC Mode will add a set of special syntactic symbols for
1729 those blocks. E.g. if the keyword is \"foo\" then there will be
1730 `foo-open', `foo-close', and `infoo' symbols.
1732 The intention is that this category should be used for block
1733 constructs that aren't related to object orientation concepts like
1734 classes (which thus also include e.g. interfaces, templates,
1735 contracts, structs, etc). The more pragmatic distinction is that
1736 while most want some indentation inside classes, it's fairly common
1737 that they don't want it in some of these constructs, so it should be
1738 simple to configure that differently from classes. See also
1739 `c-class-decl-kwds'.
1741 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1742 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1743 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1746 (c objc) '("extern")
1747 c++ '("namespace" "extern")
1752 (c-lang-defconst c-other-decl-block-key
1753 ;; Regexp matching the start of blocks besides classes that contain
1754 ;; another declaration level.
1755 t (c-make-keywords-re t (c-lang-const c-other-block-decl-kwds)))
1756 (c-lang-defvar c-other-decl-block-key (c-lang-const c-other-decl-block-key))
1758 (c-lang-defvar c-other-decl-block-key-in-symbols-alist
1762 (if (string= elt "extern")
1764 (intern (concat "in" elt)))))
1765 (c-lang-const c-other-block-decl-kwds))
1766 "Alist associating keywords in c-other-decl-block-decl-kwds with
1767 their matching \"in\" syntactic symbols.")
1769 (c-lang-defconst c-typedef-decl-kwds
1770 "Keywords introducing declarations where the identifier(s) being
1773 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1774 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1775 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1777 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1778 ;; (since e.g. "Foo" is a type that's being defined in "class Foo
1780 t (append (c-lang-const c-class-decl-kwds)
1781 (c-lang-const c-brace-list-decl-kwds))
1782 ;; Languages that have a "typedef" construct.
1783 (c c++ objc idl pike) (append (c-lang-const c-typedef-decl-kwds)
1785 ;; Unlike most other languages, exception names are not handled as
1786 ;; types in IDL since they only can occur in "raises" specs.
1787 idl (delete "exception" (append (c-lang-const c-typedef-decl-kwds) nil)))
1789 (c-lang-defconst c-typedef-decl-key
1790 t (c-make-keywords-re t (c-lang-const c-typedef-decl-kwds)))
1791 (c-lang-defvar c-typedef-decl-key (c-lang-const c-typedef-decl-key))
1793 (c-lang-defconst c-typeless-decl-kwds
1794 "Keywords introducing declarations where the \(first) identifier
1795 \(declarator) follows directly after the keyword, without any type.
1797 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1798 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1799 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1801 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1802 ;; (since e.g. "Foo" is the identifier being defined in "class Foo
1804 t (append (c-lang-const c-class-decl-kwds)
1805 (c-lang-const c-brace-list-decl-kwds))
1806 ;; Note: "manages" for CORBA CIDL clashes with its presence on
1807 ;; `c-type-list-kwds' for IDL.
1808 idl (append (c-lang-const c-typeless-decl-kwds)
1809 '("factory" "finder" "native"
1814 pike (append (c-lang-const c-class-decl-kwds)
1817 (c-lang-defconst c-modifier-kwds
1818 "Keywords that can prefix normal declarations of identifiers
1819 \(and typically act as flags). Things like argument declarations
1820 inside function headers are also considered declarations in this
1823 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1824 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1825 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1828 (c c++) '("auto" "extern" "inline" "register" "static")
1829 c++ (append '("explicit" "friend" "mutable" "template" "using" "virtual")
1830 (c-lang-const c-modifier-kwds))
1831 objc '("auto" "bycopy" "byref" "extern" "in" "inout" "oneway" "out" "static")
1832 ;; FIXME: Some of those below ought to be on `c-other-decl-kwds' instead.
1833 idl '("abstract" "attribute" "const" "consumes" "custom" "emits" "import"
1834 "in" "inout" "local" "multiple" "oneway" "out" "private" "provides"
1835 "public" "publishes" "readonly" "typeid" "typeprefix" "uses"
1839 "bindsTo" "delegatesTo" "implements" "proxy" "storedOn")
1840 ;; Note: "const" is not used in Java, but it's still a reserved keyword.
1841 java '("abstract" "const" "final" "native" "private" "protected" "public"
1842 "static" "strictfp" "synchronized" "transient" "volatile")
1843 pike '("final" "inline" "local" "nomask" "optional" "private" "protected"
1844 "public" "static" "variant"))
1846 (c-lang-defconst c-other-decl-kwds
1847 "Keywords that can start or prefix any declaration level construct,
1848 besides those on `c-class-decl-kwds', `c-brace-list-decl-kwds',
1849 `c-other-block-decl-kwds', `c-typedef-decl-kwds',
1850 `c-typeless-decl-kwds' and `c-modifier-kwds'.
1852 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1853 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1854 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1857 objc '("@class" "@end" "@defs")
1858 java '("import" "package")
1859 pike '("import" "inherit"))
1861 (c-lang-defconst c-decl-start-kwds
1862 "Keywords that always start declarations, wherever they occur.
1863 This can be used for declarations that aren't recognized by the normal
1864 combination of `c-decl-prefix-re' and `c-decl-start-re'."
1866 ;; Classes can be declared anywhere in a Pike expression.
1869 (c-lang-defconst c-decl-hangon-kwds
1870 "Keywords that can occur anywhere in a declaration level construct.
1871 This is used for self-contained things that can be tacked on anywhere
1872 on a declaration and that should be ignored to be able to recognize it
1873 correctly. Typical cases are compiler extensions like
1874 \"__attribute__\" or \"__declspec\":
1876 __declspec(noreturn) void foo();
1877 class __declspec(dllexport) classname {...};
1878 void foo() __attribute__((noreturn));
1880 Note that unrecognized plain symbols are skipped anyway if they occur
1881 before the type, so such things are not necessary to mention here.
1882 Mentioning them here is necessary only if they can occur in other
1883 places, or if they are followed by a construct that must be skipped
1884 over \(like the parens in the \"__attribute__\" and \"__declspec\"
1885 examples above). In the last case, they alse need to be present on
1886 one of `c-type-list-kwds', `c-ref-list-kwds',
1887 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1888 `c-<>-type-kwds', or `c-<>-arglist-kwds'."
1889 ;; NB: These are currently not recognized in all parts of a
1890 ;; declaration. Specifically, they aren't recognized in the middle
1891 ;; of multi-token types, inside declarators, and between the
1892 ;; identifier and the arglist paren of a function declaration.
1894 ;; FIXME: This ought to be user customizable since compiler stuff
1895 ;; like this usually is wrapped in project specific macros. (It'd
1896 ;; of course be even better if we could cope without knowing this.)
1898 (c c++) '(;; GCC extension.
1903 (c-lang-defconst c-decl-hangon-key
1904 ;; Adorned regexp matching `c-decl-hangon-kwds'.
1905 t (c-make-keywords-re t (c-lang-const c-decl-hangon-kwds)))
1906 (c-lang-defvar c-decl-hangon-key (c-lang-const c-decl-hangon-key))
1908 (c-lang-defconst c-prefix-spec-kwds
1909 ;; All keywords that can occur in the preamble of a declaration.
1910 ;; They typically occur before the type, but they are also matched
1911 ;; after presumptive types since we often can't be sure that
1912 ;; something is a type or just some sort of macro in front of the
1913 ;; declaration. They might be ambiguous with types or type
1915 t (delete-duplicates (append (c-lang-const c-class-decl-kwds)
1916 (c-lang-const c-brace-list-decl-kwds)
1917 (c-lang-const c-other-block-decl-kwds)
1918 (c-lang-const c-typedef-decl-kwds)
1919 (c-lang-const c-typeless-decl-kwds)
1920 (c-lang-const c-modifier-kwds)
1921 (c-lang-const c-other-decl-kwds)
1922 (c-lang-const c-decl-start-kwds)
1923 (c-lang-const c-decl-hangon-kwds))
1924 :test 'string-equal))
1926 (c-lang-defconst c-prefix-spec-kwds-re
1927 ;; Adorned regexp of `c-prefix-spec-kwds'.
1928 t (c-make-keywords-re t (c-lang-const c-prefix-spec-kwds)))
1930 (c-lang-defvar c-prefix-spec-kwds-re (c-lang-const c-prefix-spec-kwds-re))
1932 (c-lang-defconst c-specifier-key
1933 ;; Adorned regexp of the keywords in `c-prefix-spec-kwds' that aren't
1934 ;; ambiguous with types or type prefixes. These are the keywords (like
1935 ;; extern, namespace, but NOT template) that can modify a declaration.
1936 t (c-make-keywords-re t
1937 (set-difference (c-lang-const c-prefix-spec-kwds)
1938 (append (c-lang-const c-type-start-kwds)
1939 (c-lang-const c-<>-arglist-kwds))
1940 :test 'string-equal)))
1941 (c-lang-defvar c-specifier-key (c-lang-const c-specifier-key))
1943 (c-lang-defconst c-postfix-spec-kwds
1944 ;; Keywords that can occur after argument list of a function header
1945 ;; declaration, i.e. in the "K&R region".
1946 t (append (c-lang-const c-postfix-decl-spec-kwds)
1947 (c-lang-const c-decl-hangon-kwds)))
1949 (c-lang-defconst c-not-decl-init-keywords
1950 ;; Adorned regexp matching all keywords that can't appear at the
1951 ;; start of a declaration.
1952 t (c-make-keywords-re t
1953 (set-difference (c-lang-const c-keywords)
1954 (append (c-lang-const c-type-start-kwds)
1955 (c-lang-const c-prefix-spec-kwds))
1956 :test 'string-equal)))
1957 (c-lang-defvar c-not-decl-init-keywords
1958 (c-lang-const c-not-decl-init-keywords))
1960 (c-lang-defconst c-not-primitive-type-keywords
1961 "List of all keywords apart from primitive types (like \"int\")."
1962 t (set-difference (c-lang-const c-keywords)
1963 (c-lang-const c-primitive-type-kwds)
1964 :test 'string-equal)
1965 ;; The "more" for C++ is the QT keyword (as in "more slots:").
1966 ;; This variable is intended for use in c-beginning-of-statement-1.
1967 c++ (append (c-lang-const c-not-primitive-type-keywords) '("more")))
1969 (c-lang-defconst c-not-primitive-type-keywords-regexp
1970 t (c-make-keywords-re t
1971 (c-lang-const c-not-primitive-type-keywords)))
1972 (c-lang-defvar c-not-primitive-type-keywords-regexp
1973 (c-lang-const c-not-primitive-type-keywords-regexp))
1975 (c-lang-defconst c-protection-kwds
1976 "Access protection label keywords in classes."
1978 c++ '("private" "protected" "public")
1979 objc '("@private" "@protected" "@public"))
1981 (c-lang-defconst c-block-decls-with-vars
1982 "Keywords introducing declarations that can contain a block which
1983 might be followed by variable declarations, e.g. like \"foo\" in
1984 \"class Foo { ... } foo;\". So if there is a block in a declaration
1985 like that, it ends with the following ';' and not right away.
1987 The keywords on list are assumed to also be present on one of the
1988 `*-decl-kwds' lists."
1990 (c objc) '("struct" "union" "enum" "typedef")
1991 c++ '("class" "struct" "union" "enum" "typedef"))
1993 (c-lang-defconst c-opt-block-decls-with-vars-key
1994 ;; Regexp matching the `c-block-decls-with-vars' keywords, or nil in
1995 ;; languages without such constructs.
1996 t (and (c-lang-const c-block-decls-with-vars)
1997 (c-make-keywords-re t (c-lang-const c-block-decls-with-vars))))
1998 (c-lang-defvar c-opt-block-decls-with-vars-key
1999 (c-lang-const c-opt-block-decls-with-vars-key))
2001 (c-lang-defconst c-postfix-decl-spec-kwds
2002 "Keywords introducing extra declaration specifiers in the region
2003 between the header and the body \(i.e. the \"K&R-region\") in
2006 java '("extends" "implements" "throws")
2007 idl '("context" "getraises" "manages" "primarykey" "raises" "setraises"
2010 "as" "const" "implements" "of" "ref"))
2012 (c-lang-defconst c-nonsymbol-sexp-kwds
2013 "Keywords that may be followed by a nonsymbol sexp before whatever
2014 construct it's part of continues."
2016 (c c++ objc) '("extern"))
2018 (c-lang-defconst c-type-list-kwds
2019 "Keywords that may be followed by a comma separated list of type
2020 identifiers, where each optionally can be prefixed by keywords. (Can
2021 also be used for the special case when the list can contain only one
2024 Assumed to be mutually exclusive with `c-ref-list-kwds'. There's no
2025 reason to put keywords on this list if they are on `c-type-prefix-kwds'.
2026 There's also no reason to add keywords that prefixes a normal
2027 declaration consisting of a type followed by a declarator (list), so
2028 the keywords on `c-modifier-kwds' should normally not be listed here
2031 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2032 or variable identifier (that's being defined)."
2036 java '("import" "new" "extends" "super" "implements" "throws")
2037 idl '("manages" "native" "primarykey" "supports"
2039 "as" "implements" "of" "scope")
2042 (c-lang-defconst c-ref-list-kwds
2043 "Keywords that may be followed by a comma separated list of
2044 reference (i.e. namespace/scope/module) identifiers, where each
2045 optionally can be prefixed by keywords. (Can also be used for the
2046 special case when the list can contain only one element.) Assumed to
2047 be mutually exclusive with `c-type-list-kwds'.
2049 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2050 or variable identifier (that's being defined)."
2054 idl '("import" "module"
2059 (c-lang-defconst c-colon-type-list-kwds
2060 "Keywords that may be followed (not necessarily directly) by a colon
2061 and then a comma separated list of type identifiers, where each
2062 optionally can be prefixed by keywords. (Can also be used for the
2063 special case when the list can contain only one element.)"
2065 c++ '("class" "struct")
2066 idl '("component" "eventtype" "home" "interface" "valuetype"
2068 "storagehome" "storagetype"))
2070 (c-lang-defconst c-colon-type-list-re
2071 "Regexp matched after the keywords in `c-colon-type-list-kwds' to skip
2072 forward to the colon. The end of the match is assumed to be directly
2073 after the colon, so the regexp should end with \":\". Must be a
2074 regexp if `c-colon-type-list-kwds' isn't nil."
2075 t (if (c-lang-const c-colon-type-list-kwds)
2076 ;; Disallow various common punctuation chars that can't come
2077 ;; before the ":" that starts the inherit list after "class"
2078 ;; or "struct" in C++. (Also used as default for other
2080 "[^\]\[{}();,/#=:]*:"))
2081 (c-lang-defvar c-colon-type-list-re (c-lang-const c-colon-type-list-re))
2083 (c-lang-defconst c-paren-nontype-kwds
2084 "Keywords that may be followed by a parenthesis expression that doesn't
2085 contain type identifiers."
2087 (c c++) '(;; GCC extension.
2092 (c-lang-defconst c-paren-type-kwds
2093 "Keywords that may be followed by a parenthesis expression containing
2094 type identifiers separated by arbitrary tokens."
2099 pike '("array" "function" "int" "mapping" "multiset" "object" "program"))
2101 (c-lang-defconst c-paren-any-kwds
2102 t (delete-duplicates (append (c-lang-const c-paren-nontype-kwds)
2103 (c-lang-const c-paren-type-kwds))
2104 :test 'string-equal))
2106 (c-lang-defconst c-<>-type-kwds
2107 "Keywords that may be followed by an angle bracket expression
2108 containing type identifiers separated by \",\". The difference from
2109 `c-<>-arglist-kwds' is that unknown names are taken to be types and
2110 not other identifiers. `c-recognize-<>-arglists' is assumed to be set
2118 (c-lang-defconst c-<>-arglist-kwds
2119 "Keywords that can be followed by a C++ style template arglist; see
2120 `c-recognize-<>-arglists' for details. That language constant is
2121 assumed to be set if this isn't nil."
2124 idl '("fixed" "string" "wstring"))
2126 (c-lang-defconst c-<>-sexp-kwds
2127 ;; All keywords that can be followed by an angle bracket sexp.
2128 t (delete-duplicates (append (c-lang-const c-<>-type-kwds)
2129 (c-lang-const c-<>-arglist-kwds))
2130 :test 'string-equal))
2132 (c-lang-defconst c-opt-<>-sexp-key
2133 ;; Adorned regexp matching keywords that can be followed by an angle
2134 ;; bracket sexp. Always set when `c-recognize-<>-arglists' is.
2135 t (if (c-lang-const c-recognize-<>-arglists)
2136 (c-make-keywords-re t (c-lang-const c-<>-sexp-kwds))))
2137 (c-lang-defvar c-opt-<>-sexp-key (c-lang-const c-opt-<>-sexp-key))
2139 (c-lang-defconst c-brace-id-list-kwds
2140 "Keywords that may be followed by a brace block containing a comma
2141 separated list of identifier definitions, i.e. like the list of
2142 identifiers that follows the type in a normal declaration."
2143 t (c-lang-const c-brace-list-decl-kwds))
2145 (c-lang-defconst c-block-stmt-1-kwds
2146 "Statement keywords followed directly by a substatement."
2148 c++ '("do" "else" "try")
2149 objc '("do" "else" "@finally" "@try")
2150 java '("do" "else" "finally" "try")
2153 (c-lang-defconst c-block-stmt-1-key
2154 ;; Regexp matching the start of any statement followed directly by a
2155 ;; substatement (doesn't match a bare block, however).
2156 t (c-make-keywords-re t (c-lang-const c-block-stmt-1-kwds)))
2157 (c-lang-defvar c-block-stmt-1-key (c-lang-const c-block-stmt-1-key))
2159 (c-lang-defconst c-block-stmt-2-kwds
2160 "Statement keywords followed by a paren sexp and then by a substatement."
2161 t '("for" "if" "switch" "while")
2162 c++ '("for" "if" "switch" "while" "catch")
2163 objc '("for" "if" "switch" "while" "@catch" "@synchronized")
2164 java '("for" "if" "switch" "while" "catch" "synchronized")
2166 pike '("for" "if" "switch" "while" "foreach")
2167 awk '("for" "if" "while"))
2169 (c-lang-defconst c-block-stmt-2-key
2170 ;; Regexp matching the start of any statement followed by a paren sexp
2171 ;; and then by a substatement.
2172 t (c-make-keywords-re t (c-lang-const c-block-stmt-2-kwds)))
2173 (c-lang-defvar c-block-stmt-2-key (c-lang-const c-block-stmt-2-key))
2175 (c-lang-defconst c-block-stmt-kwds
2176 ;; Union of `c-block-stmt-1-kwds' and `c-block-stmt-2-kwds'.
2177 t (delete-duplicates (append (c-lang-const c-block-stmt-1-kwds)
2178 (c-lang-const c-block-stmt-2-kwds))
2179 :test 'string-equal))
2181 (c-lang-defconst c-opt-block-stmt-key
2182 ;; Regexp matching the start of any statement that has a
2183 ;; substatement (except a bare block). Nil in languages that
2184 ;; don't have such constructs.
2185 t (if (or (c-lang-const c-block-stmt-1-kwds)
2186 (c-lang-const c-block-stmt-2-kwds))
2187 (c-make-keywords-re t
2188 (append (c-lang-const c-block-stmt-1-kwds)
2189 (c-lang-const c-block-stmt-2-kwds)))))
2190 (c-lang-defvar c-opt-block-stmt-key (c-lang-const c-opt-block-stmt-key))
2192 (c-lang-defconst c-simple-stmt-kwds
2193 "Statement keywords followed by an expression or nothing."
2194 t '("break" "continue" "goto" "return")
2195 objc '("break" "continue" "goto" "return" "@throw")
2196 ;; Note: `goto' is not valid in Java, but the keyword is still reserved.
2197 java '("break" "continue" "goto" "return" "throw")
2199 pike '("break" "continue" "return")
2200 awk '(;; Not sure about "delete", "exit", "getline", etc. ; ACM 2002/5/30
2201 "break" "continue" "return" "delete" "exit" "getline" "next"
2202 "nextfile" "print" "printf"))
2204 (c-lang-defconst c-simple-stmt-key
2205 ;; Adorned regexp matching `c-simple-stmt-kwds'.
2206 t (c-make-keywords-re t (c-lang-const c-simple-stmt-kwds)))
2207 (c-lang-defvar c-simple-stmt-key (c-lang-const c-simple-stmt-key))
2209 (c-lang-defconst c-paren-stmt-kwds
2210 "Statement keywords followed by a parenthesis expression that
2211 nevertheless contains a list separated with ';' and not ','."
2215 (c-lang-defconst c-paren-stmt-key
2216 ;; Adorned regexp matching `c-paren-stmt-kwds'.
2217 t (c-make-keywords-re t (c-lang-const c-paren-stmt-kwds)))
2218 (c-lang-defvar c-paren-stmt-key (c-lang-const c-paren-stmt-key))
2220 (c-lang-defconst c-asm-stmt-kwds
2221 "Statement keywords followed by an assembler expression."
2223 (c c++) '("asm" "__asm__")) ;; Not standard, but common.
2225 (c-lang-defconst c-opt-asm-stmt-key
2226 ;; Regexp matching the start of an assembler statement. Nil in
2227 ;; languages that don't support that.
2228 t (if (c-lang-const c-asm-stmt-kwds)
2229 (c-make-keywords-re t (c-lang-const c-asm-stmt-kwds))))
2230 (c-lang-defvar c-opt-asm-stmt-key (c-lang-const c-opt-asm-stmt-key))
2232 (c-lang-defconst c-case-kwds
2233 "The keyword\(s) which introduce a \"case\" like construct.
2234 This construct is \"<keyword> <expression> :\"."
2238 (c-lang-defconst c-case-kwds-regexp
2239 ;; Adorned regexp matching any "case"-like keyword.
2240 t (c-make-keywords-re t (c-lang-const c-case-kwds)))
2241 (c-lang-defvar c-case-kwds-regexp (c-lang-const c-case-kwds-regexp))
2243 (c-lang-defconst c-label-kwds
2244 "Keywords introducing colon terminated labels in blocks."
2245 t '("case" "default"))
2247 (c-lang-defconst c-label-kwds-regexp
2248 ;; Adorned regexp matching any keyword that introduces a label.
2249 t (c-make-keywords-re t (c-lang-const c-label-kwds)))
2250 (c-lang-defvar c-label-kwds-regexp (c-lang-const c-label-kwds-regexp))
2252 (c-lang-defconst c-before-label-kwds
2253 "Keywords that might be followed by a label identifier."
2255 (java pike) (append '("break" "continue")
2256 (c-lang-const c-before-label-kwds))
2260 (c-lang-defconst c-constant-kwds
2261 "Keywords for constants."
2263 (c c++) '("NULL" ;; Not a keyword, but practically works as one.
2264 "false" "true") ; Defined in C99.
2265 objc '("nil" "Nil" "YES" "NO" "NS_DURING" "NS_HANDLER" "NS_ENDHANDLER")
2266 idl '("TRUE" "FALSE")
2267 java '("true" "false" "null") ; technically "literals", not keywords
2268 pike '("UNDEFINED")) ;; Not a keyword, but practically works as one.
2270 (c-lang-defconst c-primary-expr-kwds
2271 "Keywords besides constants and operators that start primary expressions."
2273 c++ '("operator" "this")
2274 objc '("super" "self")
2276 pike '("this")) ;; Not really a keyword, but practically works as one.
2278 (c-lang-defconst c-expr-kwds
2279 ;; Keywords that can occur anywhere in expressions. Built from
2280 ;; `c-primary-expr-kwds' and all keyword operators in `c-operators'.
2281 t (delete-duplicates
2282 (append (c-lang-const c-primary-expr-kwds)
2283 (c-filter-ops (c-lang-const c-operator-list)
2285 "\\`\\(\\w\\|\\s_\\)+\\'"))
2286 :test 'string-equal))
2288 (c-lang-defconst c-lambda-kwds
2289 "Keywords that start lambda constructs, i.e. function definitions in
2294 (c-lang-defconst c-inexpr-block-kwds
2295 "Keywords that start constructs followed by statement blocks which can
2296 be used in expressions \(the gcc extension for this in C and C++ is
2297 handled separately by `c-recognize-paren-inexpr-blocks')."
2299 pike '("catch" "gauge"))
2301 (c-lang-defconst c-inexpr-class-kwds
2302 "Keywords that can start classes inside expressions."
2307 (c-lang-defconst c-inexpr-brace-list-kwds
2308 "Keywords that can start brace list blocks inside expressions.
2309 Note that Java specific rules are currently applied to tell this from
2310 `c-inexpr-class-kwds'."
2314 (c-lang-defconst c-opt-inexpr-brace-list-key
2315 ;; Regexp matching the start of a brace list in an expression, or
2316 ;; nil in languages that don't have such things. This should not
2317 ;; match brace lists recognized through `c-special-brace-lists'.
2318 t (and (c-lang-const c-inexpr-brace-list-kwds)
2319 (c-make-keywords-re t (c-lang-const c-inexpr-brace-list-kwds))))
2320 (c-lang-defvar c-opt-inexpr-brace-list-key
2321 (c-lang-const c-opt-inexpr-brace-list-key))
2323 (c-lang-defconst c-decl-block-key
2324 ;; Regexp matching keywords in any construct that contain another
2325 ;; declaration level, i.e. that isn't followed by a function block
2326 ;; or brace list. When the first submatch matches, it's an
2327 ;; unambiguous construct, otherwise it's an ambiguous match that
2328 ;; might also be the return type of a function declaration.
2329 t (let* ((decl-kwds (append (c-lang-const c-class-decl-kwds)
2330 (c-lang-const c-other-block-decl-kwds)
2331 (c-lang-const c-inexpr-class-kwds)))
2332 (unambiguous (set-difference decl-kwds
2333 (c-lang-const c-type-start-kwds)
2334 :test 'string-equal))
2335 (ambiguous (intersection decl-kwds
2336 (c-lang-const c-type-start-kwds)
2337 :test 'string-equal)))
2339 (concat (c-make-keywords-re t unambiguous)
2341 (c-make-keywords-re t ambiguous))
2342 (c-make-keywords-re t unambiguous))))
2343 (c-lang-defvar c-decl-block-key (c-lang-const c-decl-block-key))
2345 (c-lang-defconst c-bitfield-kwds
2346 "Keywords that can introduce bitfields."
2348 (c c++ objc) '("char" "int" "long" "signed" "unsigned"))
2350 (c-lang-defconst c-opt-bitfield-key
2351 ;; Regexp matching the start of a bitfield (not uniquely), or nil in
2352 ;; languages without bitfield support.
2354 (c c++) (c-make-keywords-re t (c-lang-const c-bitfield-kwds)))
2355 (c-lang-defvar c-opt-bitfield-key (c-lang-const c-opt-bitfield-key))
2357 (c-lang-defconst c-other-kwds
2358 "Keywords not accounted for by any other `*-kwds' language constant."
2361 ;; In CORBA CIDL: (These are declaration keywords that never
2362 ;; can start a declaration.)
2363 "entity" "process" "service" "session" "storage"))
2366 ;;; Constants built from keywords.
2368 ;; Note: No `*-kwds' language constants may be defined below this point.
2371 (defconst c-kwds-lang-consts
2372 ;; List of all the language constants that contain keyword lists.
2374 (mapatoms (lambda (sym)
2375 (when (and (boundp sym)
2376 (string-match "-kwds\\'" (symbol-name sym)))
2377 ;; Make the list of globally interned symbols
2378 ;; instead of ones interned in `c-lang-constants'.
2379 (setq list (cons (intern (symbol-name sym)) list))))
2383 (c-lang-defconst c-keywords
2384 ;; All keywords as a list.
2385 t (delete-duplicates
2386 (c-lang-defconst-eval-immediately
2387 `(append ,@(mapcar (lambda (kwds-lang-const)
2388 `(c-lang-const ,kwds-lang-const))
2391 :test 'string-equal))
2393 (c-lang-defconst c-keywords-regexp
2394 ;; All keywords as an adorned regexp.
2395 t (c-make-keywords-re t (c-lang-const c-keywords)))
2396 (c-lang-defvar c-keywords-regexp (c-lang-const c-keywords-regexp))
2398 (c-lang-defconst c-keyword-member-alist
2399 ;; An alist with all the keywords in the cars. The cdr for each
2400 ;; keyword is a list of the symbols for the `*-kwds' lists that
2402 t (let ((kwd-list-alist
2403 (c-lang-defconst-eval-immediately
2404 `(list ,@(mapcar (lambda (kwds-lang-const)
2405 `(cons ',kwds-lang-const
2406 (c-lang-const ,kwds-lang-const)))
2407 c-kwds-lang-consts))))
2408 lang-const kwd-list kwd
2410 (while kwd-list-alist
2411 (setq lang-const (caar kwd-list-alist)
2412 kwd-list (cdar kwd-list-alist)
2413 kwd-list-alist (cdr kwd-list-alist))
2415 (setq kwd (car kwd-list)
2416 kwd-list (cdr kwd-list))
2417 (unless (setq elem (assoc kwd result-alist))
2418 (setq result-alist (cons (setq elem (list kwd)) result-alist)))
2419 (unless (memq lang-const (cdr elem))
2420 (setcdr elem (cons lang-const (cdr elem))))))
2423 (c-lang-defvar c-keywords-obarray
2424 ;; An obarray containing all keywords as symbols. The property list
2425 ;; of each symbol has a non-nil entry for the specific `*-kwds'
2426 ;; lists it's a member of.
2428 ;; E.g. to see whether the string str contains a keyword on
2429 ;; `c-class-decl-kwds', one can do like this:
2430 ;; (get (intern-soft str c-keyword-obarray) 'c-class-decl-kwds)
2431 ;; Which preferably is written using the associated functions in
2433 ;; (c-keyword-member (c-keyword-sym str) 'c-class-decl-kwds)
2435 ;; The obarray is not stored directly as a language constant since
2436 ;; the printed representation for obarrays used in .elc files isn't
2439 (let* ((alist (c-lang-const c-keyword-member-alist))
2441 (obarray (make-vector (* (length alist) 2) 0)))
2443 (setq kwd (caar alist)
2444 lang-const-list (cdar alist)
2446 (setplist (intern kwd obarray)
2447 ;; Emacs has an odd bug that causes `mapcan' to fail
2448 ;; with unintelligible errors. (XEmacs works.)
2449 ;;(mapcan (lambda (lang-const)
2450 ;; (list lang-const t))
2452 (apply 'nconc (mapcar (lambda (lang-const)
2453 (list lang-const t))
2457 (c-lang-defconst c-regular-keywords-regexp
2458 ;; Adorned regexp matching all keywords that should be fontified
2459 ;; with the keywords face. I.e. that aren't types or constants.
2460 t (c-make-keywords-re t
2461 (set-difference (c-lang-const c-keywords)
2462 (append (c-lang-const c-primitive-type-kwds)
2463 (c-lang-const c-constant-kwds))
2464 :test 'string-equal)))
2465 (c-lang-defvar c-regular-keywords-regexp
2466 (c-lang-const c-regular-keywords-regexp))
2468 (c-lang-defconst c-primary-expr-regexp
2469 ;; Regexp matching the start of any primary expression, i.e. any
2470 ;; literal, symbol, prefix operator, and '('. It doesn't need to
2471 ;; exclude keywords; they are excluded afterwards unless the second
2472 ;; submatch matches. If the first but not the second submatch
2473 ;; matches then it is an ambiguous primary expression; it could also
2474 ;; be a match of e.g. an infix operator. (The case with ambiguous
2475 ;; keyword operators isn't handled.)
2477 t (let* ((prefix-ops
2478 (c-filter-ops (c-lang-const c-operators)
2481 ;; Filter out the special case prefix
2482 ;; operators that are close parens.
2483 (not (string-match "\\s)" op)))))
2485 (nonkeyword-prefix-ops
2486 (c-filter-ops prefix-ops
2488 "\\`\\(\\s.\\|\\s(\\|\\s)\\)+\\'"))
2491 (c-filter-ops (c-lang-const c-operators)
2496 right-assoc-sequence)
2499 (unambiguous-prefix-ops (set-difference nonkeyword-prefix-ops
2501 :test 'string-equal))
2502 (ambiguous-prefix-ops (intersection nonkeyword-prefix-ops
2504 :test 'string-equal)))
2508 ;; Take out all symbol class operators from `prefix-ops' and make the
2509 ;; first submatch from them together with `c-primary-expr-kwds'.
2510 (c-make-keywords-re t
2511 (append (c-lang-const c-primary-expr-kwds)
2512 (set-difference prefix-ops nonkeyword-prefix-ops
2513 :test 'string-equal)))
2516 ;; Match all ambiguous operators.
2517 (c-make-keywords-re nil
2518 (intersection nonkeyword-prefix-ops in-or-postfix-ops
2519 :test 'string-equal))
2523 ;; Now match all other symbols.
2524 (c-lang-const c-symbol-start)
2527 ;; The chars that can start integer and floating point
2532 ;; The unambiguous operators from `prefix-ops'.
2533 (c-make-keywords-re nil
2534 (set-difference nonkeyword-prefix-ops in-or-postfix-ops
2535 :test 'string-equal))
2538 ;; Match string and character literals.
2540 (if (memq 'gen-string-delim c-emacs-features)
2543 (c-lang-defvar c-primary-expr-regexp (c-lang-const c-primary-expr-regexp))
2546 ;;; Additional constants for parser-level constructs.
2548 (c-lang-defconst c-decl-prefix-re
2549 "Regexp matching something that might precede a declaration, cast or
2550 label, such as the last token of a preceding statement or declaration.
2551 This is used in the common situation where a declaration or cast
2552 doesn't start with any specific token that can be searched for.
2554 The regexp should not match bob; that is done implicitly. It can't
2555 require a match longer than one token. The end of the token is taken
2556 to be at the end of the first submatch, which is assumed to always
2557 match. It's undefined whether identifier syntax (see
2558 `c-identifier-syntax-table') is in effect or not. This regexp is
2559 assumed to be a superset of `c-label-prefix-re' if
2560 `c-recognize-colon-labels' is set.
2562 Besides this, `c-decl-start-kwds' is used to find declarations.
2564 Note: This variable together with `c-decl-start-re' and
2565 `c-decl-start-kwds' is only used to detect \"likely\"
2566 declaration/cast/label starts. I.e. they might produce more matches
2567 but should not miss anything (or else it's necessary to use text
2568 properties - see the next note). Wherever they match, the following
2569 construct is analyzed to see if it indeed is a declaration, cast or
2570 label. That analysis is not cheap, so it's important that not too
2571 many false matches are triggered.
2573 Note: If a declaration/cast/label start can't be detected with this
2574 variable, it's necessary to use the `c-type' text property with the
2575 value `c-decl-end' on the last char of the last token preceding the
2576 declaration. See the comment blurb at the start of cc-engine.el for
2579 ;; We match a sequence of characters to skip over things like \"};\"
2580 ;; more quickly. We match ")" in C for K&R region declarations, and
2581 ;; in all languages except Java for when a cpp macro definition
2582 ;; begins with a declaration.
2583 t "\\([\{\}\(\);,]+\\)"
2584 java "\\([\{\}\(;,<]+\\)"
2585 ;; Match "<" in C++ to get the first argument in a template arglist.
2586 ;; In that case there's an additional check in `c-find-decl-spots'
2587 ;; that it got open paren syntax.
2588 c++ "\\([\{\}\(\);,<]+\\)"
2589 ;; Additionally match the protection directives in Objective-C.
2590 ;; Note that this doesn't cope with the longer directives, which we
2591 ;; would have to match from start to end since they don't end with
2592 ;; any easily recognized characters.
2593 objc (concat "\\([\{\}\(\);,]+\\|"
2594 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
2596 ;; Pike is like C but we also match "[" for multiple value
2597 ;; assignments and type casts.
2598 pike "\\([\{\}\(\)\[;,]+\\)")
2599 (c-lang-defvar c-decl-prefix-re (c-lang-const c-decl-prefix-re)
2602 (c-lang-defconst c-decl-start-re
2603 "Regexp matching the start of any declaration, cast or label.
2604 It's used on the token after the one `c-decl-prefix-re' matched. This
2605 regexp should not try to match those constructs accurately as it's
2606 only used as a sieve to avoid spending more time checking other
2608 t (c-lang-const c-identifier-start))
2609 (c-lang-defvar c-decl-start-re (c-lang-const c-decl-start-re))
2611 (c-lang-defconst c-decl-prefix-or-start-re
2612 ;; Regexp matching something that might precede or start a
2613 ;; declaration, cast or label.
2615 ;; If the first submatch matches, it's taken to match the end of a
2616 ;; token that might precede such a construct, e.g. ';', '}' or '{'.
2617 ;; It's built from `c-decl-prefix-re'.
2619 ;; If the first submatch did not match, the match of the whole
2620 ;; regexp is taken to be at the first token in the declaration.
2621 ;; `c-decl-start-re' is not checked in this case.
2623 ;; Design note: The reason the same regexp is used to match both
2624 ;; tokens that precede declarations and start them is to avoid an
2625 ;; extra regexp search from the previous declaration spot in
2626 ;; `c-find-decl-spots'. Users of `c-find-decl-spots' also count on
2627 ;; that it finds all declaration/cast/label starts in approximately
2628 ;; linear order, so we can't do the searches in two separate passes.
2629 t (if (c-lang-const c-decl-start-kwds)
2630 (concat (c-lang-const c-decl-prefix-re)
2632 (c-make-keywords-re t (c-lang-const c-decl-start-kwds)))
2633 (c-lang-const c-decl-prefix-re)))
2634 (c-lang-defvar c-decl-prefix-or-start-re
2635 (c-lang-const c-decl-prefix-or-start-re)
2638 (c-lang-defconst c-cast-parens
2639 ;; List containing the paren characters that can open a cast, or nil in
2640 ;; languages without casts.
2641 t (c-filter-ops (c-lang-const c-operators)
2644 (lambda (op) (elt op 0))))
2645 (c-lang-defvar c-cast-parens (c-lang-const c-cast-parens))
2647 (c-lang-defconst c-block-prefix-disallowed-chars
2648 "List of syntactically relevant characters that never can occur before
2649 the open brace in any construct that contains a brace block, e.g. in
2650 the \"class Foo: public Bar\" part of:
2652 class Foo: public Bar {int x();} a, *b;
2654 If parens can occur, the chars inside those aren't filtered with this
2657 '<' and '>' should be disallowed even if angle bracket arglists can
2658 occur. That since the search function needs to stop at them anyway to
2659 ensure they are given paren syntax.
2661 This is used to skip backward from the open brace to find the region
2662 in which to look for a construct like \"class\", \"enum\",
2663 \"namespace\" or whatever. That skipping should be as tight as
2664 possible for good performance."
2666 ;; Default to all chars that only occurs in nonsymbol tokens outside
2669 (c-lang-const c-nonsymbol-token-char-list)
2670 (c-filter-ops (append (c-lang-const c-identifier-ops)
2672 (c-lang-const c-after-id-concat-ops))))
2677 (while (string-match "\\(\\s.\\|\\s(\\|\\s)\\)"
2679 (setq res (cons (aref op (match-beginning 1)) res)
2683 ;; Allow cpp operations (where applicable).
2684 t (if (c-lang-const c-opt-cpp-prefix)
2685 (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2687 (c-lang-const c-block-prefix-disallowed-chars))
2689 ;; Allow ':' for inherit list starters.
2690 (c++ objc idl) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2693 ;; Allow ',' for multiple inherits.
2694 (c++ java) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2697 ;; Allow parentheses for anonymous inner classes in Java and class
2698 ;; initializer lists in Pike.
2699 (java pike) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2702 ;; Allow '"' for extern clauses (e.g. extern "C" {...}).
2703 (c c++ objc) (set-difference (c-lang-const c-block-prefix-disallowed-chars)
2706 (c-lang-defconst c-block-prefix-charset
2707 ;; `c-block-prefix-disallowed-chars' as an inverted charset suitable
2708 ;; for `c-syntactic-skip-backward'.
2709 t (c-make-bare-char-alt (c-lang-const c-block-prefix-disallowed-chars) t))
2710 (c-lang-defvar c-block-prefix-charset (c-lang-const c-block-prefix-charset))
2712 (c-lang-defconst c-type-decl-prefix-key
2713 "Regexp matching the declarator operators that might precede the
2714 identifier in a declaration, e.g. the \"*\" in \"char *argv\". This
2715 regexp should match \"(\" if parentheses are valid in declarators.
2716 The end of the first submatch is taken as the end of the operator.
2717 Identifier syntax is in effect when this is matched \(see
2718 `c-identifier-syntax-table')."
2719 t (if (c-lang-const c-type-modifier-kwds)
2720 (concat (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>")
2721 ;; Default to a regexp that never matches.
2723 ;; Check that there's no "=" afterwards to avoid matching tokens
2725 (c objc) (concat "\\("
2728 (c-lang-const c-type-decl-prefix-key)
2734 (c-lang-const c-type-decl-prefix-key)
2737 ;; If this matches there's special treatment in
2738 ;; `c-font-lock-declarators' and
2739 ;; `c-font-lock-declarations' that check for a
2740 ;; complete name followed by ":: *".
2741 (c-lang-const c-identifier-start)
2745 pike "\\(\\*\\)\\([^=]\\|$\\)")
2746 (c-lang-defvar c-type-decl-prefix-key (c-lang-const c-type-decl-prefix-key)
2749 (c-lang-defconst c-type-decl-suffix-key
2750 "Regexp matching the declarator operators that might follow after the
2751 identifier in a declaration, e.g. the \"[\" in \"char argv[]\". This
2752 regexp should match \")\" if parentheses are valid in declarators. If
2753 it matches an open paren of some kind, the type declaration check
2754 continues at the corresponding close paren, otherwise the end of the
2755 first submatch is taken as the end of the operator. Identifier syntax
2756 is in effect when this is matched (see `c-identifier-syntax-table')."
2757 ;; Default to a regexp that matches `c-type-modifier-kwds' and a
2758 ;; function argument list parenthesis.
2759 t (if (c-lang-const c-type-modifier-kwds)
2761 (regexp-opt (c-lang-const c-type-modifier-kwds) t) "\\>"
2764 (c c++ objc) (concat
2767 (if (c-lang-const c-type-modifier-kwds)
2770 ;; "throw" in `c-type-modifier-kwds' is followed
2771 ;; by a parenthesis list, but no extra measures
2772 ;; are necessary to handle that.
2773 (regexp-opt (c-lang-const c-type-modifier-kwds) t)
2777 (java idl) "\\([\[\(]\\)")
2778 (c-lang-defvar c-type-decl-suffix-key (c-lang-const c-type-decl-suffix-key)
2781 (c-lang-defconst c-after-suffixed-type-decl-key
2782 "This regexp is matched after a declarator expression where
2783 `c-type-decl-suffix-key' has matched. If it matches then the
2784 construct is taken as a declaration. It's typically used to match the
2785 beginning of a function body or whatever might occur after the
2786 function header in a function declaration or definition. It's
2787 undefined whether identifier syntax (see `c-identifier-syntax-table')
2788 is in effect or not.
2790 Note that it's used in cases like after \"foo (bar)\" so it should
2791 only match when it's certain that it's a declaration, e.g \"{\" but
2792 not \",\" or \";\"."
2794 ;; If K&R style declarations should be recognized then one could
2795 ;; consider to match the start of any symbol since we want to match
2796 ;; the start of the first declaration in the "K&R region". That
2797 ;; could however produce false matches on code like "FOO(bar) x"
2798 ;; where FOO is a cpp macro, so it's better to leave it out and rely
2799 ;; on the other heuristics in that case.
2800 t (if (c-lang-const c-postfix-spec-kwds)
2801 ;; Add on the keywords in `c-postfix-spec-kwds'.
2802 (concat (c-lang-const c-after-suffixed-type-decl-key)
2804 (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
2805 (c-lang-const c-after-suffixed-type-decl-key))
2806 ;; Also match the colon that starts a base class initializer list in
2807 ;; C++. That can be confused with a function call before the colon
2808 ;; in a ? : operator, but we count on that `c-decl-prefix-re' won't
2809 ;; match before such a thing (as a declaration-level construct;
2810 ;; matches inside arglist contexts are already excluded).
2812 (c-lang-defvar c-after-suffixed-type-decl-key
2813 (c-lang-const c-after-suffixed-type-decl-key)
2816 (c-lang-defconst c-after-suffixed-type-maybe-decl-key
2817 ;; Regexp that in addition to `c-after-suffixed-type-decl-key'
2818 ;; matches ";" and ",".
2819 t (concat "\\(" (c-lang-const c-after-suffixed-type-decl-key) "\\)"
2821 (c-lang-defvar c-after-suffixed-type-maybe-decl-key
2822 (c-lang-const c-after-suffixed-type-maybe-decl-key))
2824 (c-lang-defconst c-opt-type-concat-key
2825 "Regexp matching operators that concatenate types, e.g. the \"|\" in
2826 \"int|string\" in Pike. The end of the first submatch is taken as the
2827 end of the operator. nil in languages without such operators. It's
2828 undefined whether identifier syntax (see `c-identifier-syntax-table')
2829 is in effect or not."
2831 pike "\\([|.&]\\)\\($\\|[^|.&]\\)")
2832 (c-lang-defvar c-opt-type-concat-key (c-lang-const c-opt-type-concat-key)
2835 (c-lang-defconst c-opt-type-suffix-key
2836 "Regexp matching operators that might follow after a type, or nil in
2837 languages that don't have such operators. The end of the first
2838 submatch is taken as the end of the operator. This should not match
2839 things like C++ template arglists if `c-recognize-<>-arglists' is set.
2840 It's undefined whether identifier syntax (see `c-identifier-syntax-table')
2841 is in effect or not."
2843 (c c++ objc pike) "\\(\\.\\.\\.\\)"
2844 java (concat "\\(\\[" (c-lang-const c-simple-ws) "*\\]\\|\\.\\.\\.\\)"))
2845 (c-lang-defvar c-opt-type-suffix-key (c-lang-const c-opt-type-suffix-key))
2847 (c-lang-defvar c-known-type-key
2848 ;; Regexp matching the known type identifiers. This is initialized
2849 ;; from the type keywords and `*-font-lock-extra-types'. The first
2850 ;; submatch is the one that matches the type. Note that this regexp
2851 ;; assumes that symbol constituents like '_' and '$' have word
2854 (when (boundp (c-mode-symbol "font-lock-extra-types"))
2855 (c-mode-var "font-lock-extra-types")))
2858 (mapcar (lambda (re)
2859 (when (string-match "[][.*+?^$\\]" re)
2864 (mapcar (lambda (re)
2865 (unless (string-match "[][.*+?^$\\]" re)
2870 (append (list (c-make-keywords-re nil
2871 (append (c-lang-const c-primitive-type-kwds)
2877 (c-lang-defconst c-special-brace-lists
2878 "List of open- and close-chars that makes up a pike-style brace list,
2879 i.e. for a ([Â ]) list there should be a cons (?\\[ . ?\\]) in this
2882 pike '((?{ . ?}) (?\[ . ?\]) (?< . ?>)))
2883 (c-lang-defvar c-special-brace-lists (c-lang-const c-special-brace-lists))
2885 (c-lang-defconst c-recognize-knr-p
2886 "Non-nil means K&R style argument declarations are valid."
2889 (c-lang-defvar c-recognize-knr-p (c-lang-const c-recognize-knr-p))
2891 (c-lang-defconst c-recognize-typeless-decls
2892 "Non-nil means function declarations without return type should be
2893 recognized. That can introduce an ambiguity with parenthesized macro
2894 calls before a brace block. This setting does not affect declarations
2895 that are preceded by a declaration starting keyword, so
2896 e.g. `c-typeless-decl-kwds' may still be used when it's set to nil."
2899 (c-lang-defvar c-recognize-typeless-decls
2900 (c-lang-const c-recognize-typeless-decls))
2902 (c-lang-defconst c-recognize-<>-arglists
2903 "Non-nil means C++ style template arglists should be handled. More
2904 specifically, this means a comma separated list of types or
2905 expressions surrounded by \"<\" and \">\". It's always preceded by an
2906 identifier or one of the keywords on `c-<>-type-kwds' or
2907 `c-<>-arglist-kwds'. If there's an identifier before then the whole
2908 expression is considered to be a type."
2909 t (or (consp (c-lang-const c-<>-type-kwds))
2910 (consp (c-lang-const c-<>-arglist-kwds))))
2911 (c-lang-defvar c-recognize-<>-arglists (c-lang-const c-recognize-<>-arglists))
2913 (c-lang-defconst c-recognize-paren-inits
2914 "Non-nil means that parenthesis style initializers exist,
2915 i.e. constructs like
2919 in addition to the more classic
2924 (c-lang-defvar c-recognize-paren-inits (c-lang-const c-recognize-paren-inits))
2926 (c-lang-defconst c-recognize-paren-inexpr-blocks
2927 "Non-nil to recognize gcc style in-expression blocks,
2928 i.e. compound statements surrounded by parentheses inside expressions."
2931 (c-lang-defvar c-recognize-paren-inexpr-blocks
2932 (c-lang-const c-recognize-paren-inexpr-blocks))
2934 (c-lang-defconst c-opt-<>-arglist-start
2935 ;; Regexp matching the start of angle bracket arglists in languages
2936 ;; where `c-recognize-<>-arglists' is set. Does not exclude
2937 ;; keywords outside `c-<>-arglist-kwds'. The first submatch is
2938 ;; assumed to surround the preceding symbol. The whole match is
2939 ;; assumed to end directly after the opening "<".
2940 t (if (c-lang-const c-recognize-<>-arglists)
2942 (c-lang-const c-symbol-key)
2944 (c-lang-const c-syntactic-ws)
2946 (c-lang-defvar c-opt-<>-arglist-start (c-lang-const c-opt-<>-arglist-start))
2948 (c-lang-defconst c-opt-<>-arglist-start-in-paren
2949 ;; Regexp that in addition to `c-opt-<>-arglist-start' matches close
2950 ;; parens. The first submatch is assumed to surround
2951 ;; `c-opt-<>-arglist-start'.
2952 t (if (c-lang-const c-opt-<>-arglist-start)
2954 (c-lang-const c-opt-<>-arglist-start)
2956 (c-lang-defvar c-opt-<>-arglist-start-in-paren
2957 (c-lang-const c-opt-<>-arglist-start-in-paren))
2959 (c-lang-defconst c-opt-postfix-decl-spec-key
2960 ;; Regexp matching the beginning of a declaration specifier in the
2961 ;; region between the header and the body of a declaration.
2963 ;; TODO: This is currently not used uniformly; c++-mode and
2964 ;; java-mode each have their own ways of using it.
2967 (c-lang-const c-simple-ws) "*"
2968 "\\(virtual" (c-lang-const c-simple-ws) "+\\)?\\("
2969 (c-make-keywords-re nil (c-lang-const c-protection-kwds))
2970 "\\)" (c-lang-const c-simple-ws) "+"
2971 "\\(" (c-lang-const c-symbol-key) "\\)")
2972 java (c-make-keywords-re t (c-lang-const c-postfix-spec-kwds)))
2973 (c-lang-defvar c-opt-postfix-decl-spec-key
2974 (c-lang-const c-opt-postfix-decl-spec-key))
2976 (c-lang-defconst c-recognize-colon-labels
2977 "Non-nil if generic labels ending with \":\" should be recognized.
2978 That includes labels in code and access keys in classes. This does
2979 not apply to labels recognized by `c-label-kwds' and
2980 `c-opt-extra-label-key'."
2982 (c c++ objc java pike) t)
2983 (c-lang-defvar c-recognize-colon-labels
2984 (c-lang-const c-recognize-colon-labels))
2986 (c-lang-defconst c-label-prefix-re
2987 "Regexp like `c-decl-prefix-re' that matches any token that can precede
2988 a generic colon label. Not used if `c-recognize-colon-labels' is
2991 (c-lang-defvar c-label-prefix-re
2992 (c-lang-const c-label-prefix-re))
2994 (c-lang-defconst c-nonlabel-token-key
2995 "Regexp matching things that can't occur in generic colon labels,
2996 neither in a statement nor in a declaration context. The regexp is
2997 tested at the beginning of every sexp in a suspected label,
2998 i.e. before \":\". Only used if `c-recognize-colon-labels' is set."
3000 ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
3001 (c-make-keywords-re t
3002 (set-difference (c-lang-const c-keywords)
3003 (append (c-lang-const c-label-kwds)
3004 (c-lang-const c-protection-kwds))
3005 :test 'string-equal)))
3006 ;; Don't allow string literals, except in AWK. Character constants are OK.
3007 (c objc java pike idl) (concat "\"\\|"
3008 (c-lang-const c-nonlabel-token-key))
3009 ;; Also check for open parens in C++, to catch member init lists in
3010 ;; constructors. We normally allow it so that macros with arguments
3012 c++ (concat "\\s\(\\|\"\\|" (c-lang-const c-nonlabel-token-key)))
3013 (c-lang-defvar c-nonlabel-token-key (c-lang-const c-nonlabel-token-key))
3015 (c-lang-defconst c-nonlabel-token-2-key
3016 "Regexp matching things that can't occur two symbols before a colon in
3017 a label construct. This catches C++'s inheritance construct \"class foo
3018 : bar\". Only used if `c-recognize-colon-labels' is set."
3019 t "\\<\\>" ; matches nothing
3020 c++ (c-make-keywords-re t '("class")))
3021 (c-lang-defvar c-nonlabel-token-2-key (c-lang-const c-nonlabel-token-2-key))
3023 (c-lang-defconst c-opt-extra-label-key
3024 "Optional regexp matching labels.
3025 Normally, labels are detected according to `c-nonlabel-token-key',
3026 `c-decl-prefix-re' and `c-nonlabel-decl-prefix-re'. This regexp can
3027 be used if there are additional labels that aren't recognized that
3030 objc (c-make-keywords-re t (c-lang-const c-protection-kwds)))
3031 (c-lang-defvar c-opt-extra-label-key (c-lang-const c-opt-extra-label-key))
3033 (c-lang-defconst c-opt-friend-key
3034 ;; Regexp describing friend declarations classes, or nil in
3035 ;; languages that don't have such things.
3037 ;; TODO: Ought to use `c-prefix-spec-kwds-re' or similar, and the
3038 ;; template skipping isn't done properly. This will disappear soon.
3040 c++ (concat "friend" (c-lang-const c-simple-ws) "+"
3043 (c-lang-const c-simple-ws) "*"
3045 (c-lang-const c-simple-ws) "*"
3047 (c-lang-const c-simple-ws) "+")))
3048 (c-lang-defvar c-opt-friend-key (c-lang-const c-opt-friend-key))
3050 (c-lang-defconst c-opt-method-key
3051 ;; Special regexp to match the start of Objective-C methods. The
3052 ;; first submatch is assumed to end after the + or - key.
3055 ;; TODO: Ought to use a better method than anchoring on bol.
3058 (c-lang-const c-simple-ws) "*"
3059 (concat "\\(" ; Return type.
3061 (c-lang-const c-simple-ws) "*"
3063 "\\(" (c-lang-const c-symbol-key) "\\)"))
3064 (c-lang-defvar c-opt-method-key (c-lang-const c-opt-method-key))
3066 (c-lang-defconst c-type-decl-end-used
3067 ;; Must be set in buffers where the `c-type' text property might be
3068 ;; used with the value `c-decl-end'.
3070 ;; `c-decl-end' is used to mark the ends of labels and access keys
3071 ;; to make interactive refontification work better.
3072 t (or (c-lang-const c-recognize-colon-labels)
3073 (and (c-lang-const c-label-kwds) t))
3074 ;; `c-decl-end' is used to mark the end of the @-style directives in
3077 (c-lang-defvar c-type-decl-end-used (c-lang-const c-type-decl-end-used))
3080 ;;; Wrap up the `c-lang-defvar' system.
3082 ;; Compile in the list of language variables that has been collected
3083 ;; with the `c-lang-defvar' and `c-lang-setvar' macros. Note that the
3084 ;; first element of each is nil.
3085 (defconst c-lang-variable-inits (cc-eval-when-compile c-lang-variable-inits))
3086 (defconst c-emacs-variable-inits (cc-eval-when-compile c-emacs-variable-inits))
3088 ;; Make the `c-lang-setvar' variables buffer local in the current buffer.
3089 ;; These are typically standard emacs variables such as `comment-start'.
3090 (defmacro c-make-emacs-variables-local ()
3092 ,@(mapcar (lambda (init)
3093 `(make-local-variable ',(car init)))
3094 (cdr c-emacs-variable-inits))))
3096 (defun c-make-init-lang-vars-fun (mode)
3097 "Create a function that initializes all the language dependent variables
3100 This function should be evaluated at compile time, so that the
3101 function it returns is byte compiled with all the evaluated results
3102 from the language constants. Use the `c-init-language-vars' macro to
3103 accomplish that conveniently."
3105 (if (and (not load-in-progress)
3106 (boundp 'byte-compile-dest-file)
3107 (stringp byte-compile-dest-file))
3109 ;; No need to byte compile this lambda since the byte compiler is
3110 ;; smart enough to detect the `funcall' construct in the
3111 ;; `c-init-language-vars' macro below and compile it all straight
3112 ;; into the function that contains `c-init-language-vars'.
3115 ;; This let sets up the context for `c-mode-var' and similar
3116 ;; that could be in the result from `cl-macroexpand-all'.
3117 (let ((c-buffer-is-cc-mode ',mode)
3118 current-var source-eval)
3119 (c-make-emacs-variables-local)
3122 (if (eq c-version-sym ',c-version-sym)
3123 (setq ,@(let ((c-buffer-is-cc-mode mode)
3124 (c-lang-const-expansion 'immediate))
3125 ;; `c-lang-const' will expand to the evaluated
3126 ;; constant immediately in `cl-macroexpand-all'
3130 `(current-var ',(car init)
3131 ,(car init) ,(cl-macroexpand-all
3133 ;; Note: The following `append' copies the
3134 ;; first argument. That list is small, so
3135 ;; this doesn't matter too much.
3136 (append (cdr c-emacs-variable-inits)
3137 (cdr c-lang-variable-inits)))))
3139 ;; This diagnostic message isn't useful for end
3140 ;; users, so it's disabled.
3141 ;;(unless (get ',mode 'c-has-warned-lang-consts)
3142 ;; (message ,(concat "%s compiled with CC Mode %s "
3143 ;; "but loaded with %s - evaluating "
3144 ;; "language constants from source")
3145 ;; ',mode ,c-version c-version)
3146 ;; (put ',mode 'c-has-warned-lang-consts t))
3148 (setq source-eval t)
3149 (let ((init ',(append (cdr c-emacs-variable-inits)
3150 (cdr c-lang-variable-inits))))
3152 (setq current-var (caar init))
3153 (set (caar init) (eval (cadar init)))
3154 (setq init (cdr init)))))
3158 (message "Eval error in the `c-lang-defvar' or `c-lang-setvar' for `%s'%s: %S"
3162 (fallback source eval - %s compiled with CC Mode %s but loaded with %s)"
3163 ',mode ,c-version c-version)
3166 (signal (car err) (cdr err)))))))
3168 ;; Being evaluated from source. Always use the dynamic method to
3169 ;; work well when `c-lang-defvar's in this file are reevaluated
3173 (let ((c-buffer-is-cc-mode ',mode)
3174 (init (append (cdr c-emacs-variable-inits)
3175 (cdr c-lang-variable-inits)))
3177 (c-make-emacs-variables-local)
3181 (setq current-var (caar init))
3182 (set (caar init) (eval (cadar init)))
3183 (setq init (cdr init)))
3188 "Eval error in the `c-lang-defvar' or `c-lang-setver' for `%s' (source eval): %S"
3190 (signal (car err) (cdr err)))))))
3193 (defmacro c-init-language-vars (mode)
3194 "Initialize all the language dependent variables for the given mode.
3195 This macro is expanded at compile time to a form tailored for the mode
3196 in question, so MODE must be a constant. Therefore MODE is not
3197 evaluated and should not be quoted."
3198 `(funcall ,(c-make-init-lang-vars-fun mode)))
3201 (cc-provide 'cc-langs)
3203 ;;; cc-langs.el ends here