| blob | d2d2de8801a7f2e6aeda150144cefffdcd1a1969 |
1 ;;; cc-langs.el --- language specific settings for CC Mode -*- coding: utf-8 -*-
3 ;; Copyright (C) 1985, 1987, 1992-2014 Free Software Foundation, Inc.
5 ;; Authors: 2002- Alan Mackenzie
6 ;; 1998- Martin Stjernholm
7 ;; 1992-1999 Barry A. Warsaw
8 ;; 1987 Dave Detlefs
9 ;; 1987 Stewart Clamen
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
14 ;; Package: cc-mode
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/>.
31 ;;; Commentary:
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
36 ;; this:
37 ;;
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:
48 ;;
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.
54 ;;
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.
60 ;;
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.
72 ;;
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.
83 ;;
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.
94 ;;
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:
100 ;;
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.
114 ;;; Code:
116 ;; For Emacs < 22.2.
125 load-path)))
132 ;; This file is not always loaded. See note above.
133 ;; Except it is always loaded - see bug#17463.
134 ;;;(cc-external-require 'cl)
137 \f
138 ;;; Setup for the `c-lang-defvar' system.
141 ;; These are used to collect the init forms from the subsequent
142 ;; `c-lang-defvar' and `c-lang-setvar'. They are used to build the
143 ;; lambda in `c-make-init-lang-vars-fun' below, and to build `defvar's
144 ;; and `make-variable-buffer-local's in cc-engine and
145 ;; `make-local-variable's in `c-init-language-vars-for'.
149 c-lang-variable-inits-tail c-lang-variable-inits)
153 c-emacs-variable-inits-tail c-emacs-variable-inits))
156 "Declares the buffer local variable VAR to get the value VAL. VAL is
157 evaluated and assigned at mode initialization. More precisely, VAL is
158 evaluated and bound to VAR when the result from the macro
159 `c-init-language-vars' is evaluated.
161 `c-lang-const' is typically used in VAL to get the right value for the
162 language being initialized, and such calls will be macro expanded to
163 the evaluated constant value at compile time."
169 ;; Special case: If there's no docstring and the value is a
170 ;; simple (c-lang-const foo) where foo is the same name as VAR
171 ;; then take the docstring from the language constant foo.
183 ;; Return the symbol, like the other def* forms.
187 "Causes the variable VAR to be made buffer local and to get set to the
188 value VAL. VAL is evaluated and assigned at mode initialization. More
189 precisely, VAL is evaluated and bound to VAR when the result from the
190 macro `c-init-language-vars' is evaluated. VAR is typically a standard
191 Emacs variable like `comment-start'.
193 `c-lang-const' is typically used in VAL to get the right value for the
194 language being initialized, and such calls will be macro expanded to
195 the evaluated constant value at compile time."
202 ;; Return the symbol, like the other def* forms.
206 ; (eval-after-load "edebug" ; 2006-07-09: def-edebug-spec is now in subr.el.
207 ; '
211 ;; Suppress "might not be defined at runtime" warning.
212 ;; This file is only used when compiling other cc files.
213 ;; These are defined in cl as aliases to the cl- versions.
214 ;(declare-function delete-duplicates "cl-seq" (cl-seq &rest cl-keys) t)
215 ;(declare-function mapcan "cl-extra" (cl-func cl-seq &rest cl-rest) t)
216 ;(declare-function cl-macroexpand-all "cl" (form &optional env))
219 ;; Some helper functions used when building the language constants.
222 ;; Extract a subset of the operators in the list OPS in a DWIM:ey
223 ;; way. The return value is a plain list of operators:
224 ;;
225 ;; OPS either has the structure of `c-operators', is a single
226 ;; group in `c-operators', or is a plain list of operators.
227 ;;
228 ;; OPGROUP-FILTER specifies how to select the operator groups. It
229 ;; can be t to choose all groups, a list of group type symbols
230 ;; (such as 'prefix) to accept, or a function which will be called
231 ;; with the group symbol for each group and should return non-nil
232 ;; if that group is to be included.
233 ;;
234 ;; If XLATE is given, it's a function which is called for each
235 ;; matching operator and its return value is collected instead.
236 ;; If it returns a list, the elements are spliced directly into
237 ;; the final result, which is returned as a list with duplicates
238 ;; removed using `equal'.
239 ;;
240 ;; `c-mode-syntax-table' for the current mode is in effect during
241 ;; the whole procedure.
262 t)
263 t)
268 opgroup)))
269 ops)
272 \f
273 ;;; Various mode specific values that aren't language related.
276 ;; The definition for the mode menu. The menu title is prepended to
277 ;; this before it's fed to `easy-menu-define'.
287 "----"
291 ;; Only applicable if there's a cpp preprocessor.
295 "----"
300 "----"
304 "Style Name: %s"
309 c-guess-guessed-basic-offset) ]
312 c-guess-guessed-basic-offset) ])
313 "----"
325 subword-mode)])))
327 \f
328 ;;; Syntax tables.
331 "Populate the given syntax table as necessary for a C-like language.
349 ;; Set up block and line oriented comments. The new C
350 ;; standard mandates both comment styles even in C, so since
351 ;; all languages now require dual comments, we make this the
352 ;; default.
354 ;; XEmacs
358 ;; Emacs
362 ;; incompatible
366 ;; Give CR the same syntax as newline, for selective-display
370 "Functions that generates the mode specific syntax tables.
371 The syntax tables aren't stored directly since they're quite large."
375 ;; Mode specific syntaxes.
377 ;; Let '@' be part of symbols in ObjC to cope with
378 ;; its compiler directives as single keyword tokens.
379 ;; This is then necessary since it's assumed that
380 ;; every keyword is a single symbol.
384 table)))
387 ;; The syntax tables in evaluated form. Only used temporarily when
388 ;; the constants in this file are evaluated.
392 ;; A variant of `c++-mode-syntax-table' that defines `<' and `>' as
393 ;; parenthesis characters. Used temporarily when template argument
394 ;; lists are parsed. Note that this encourages incorrect parsing of
395 ;; templates since they might contain normal operators that uses the
396 ;; '<' and '>' characters. Therefore this syntax table might go
397 ;; away when CC Mode handles templates correctly everywhere.
398 t nil
403 table)))
409 ;; A variant of the standard syntax table which is used to find matching
410 ;; "<"s and ">"s which have been marked as parens using syntax table
411 ;; properties. The other paren characters (e.g. "{", ")" "]") are given a
412 ;; non-paren syntax here. so that the list commands will work on "< ... >"
413 ;; even when there's unbalanced other parens inside them.
414 ;;
415 ;; This variable is nil for languages which don't have template stuff.
425 table))))
430 "A list that describes the modifications that should be done to the
431 mode syntax table to get a syntax table that matches all identifiers
432 and keywords as words.
434 The list is just like the one used in `font-lock-defaults': Each
435 element is a cons where the car is the character to modify and the cdr
436 the new syntax, as accepted by `modify-syntax-entry'."
437 ;; The $ character is not allowed in most languages (one exception
438 ;; is Java which allows it for legacy reasons) but we still classify
439 ;; it as an identifier character since it's often used in various
440 ;; machine generated identifiers.
451 mod)
456 table)
457 "Syntax table built on the mode syntax table but additionally
458 classifies symbol constituents like '_' and '$' as word constituents,
462 ;; For documentation see the following c-lang-defvar of the same name.
463 ;; The value here may be a list of functions or a single function.
464 t nil
466 c-before-change-check-<>-operators
467 c-invalidate-macro-cache)
469 ;; java 'c-before-change-check-<>-operators
474 fs
476 "If non-nil, a list of functions called from c-before-change-hook.
477 Typically these will record enough state to allow
478 `c-before-font-lock-function' to extend the region to fontify,
479 and may do such things as removing text-properties which must be
480 recalculated.
482 These functions will be run in the order given. Each of them
483 takes 2 parameters, the BEG and END supplied to every
484 before-change function; on entry, the buffer will have been
485 widened and match-data will have been saved; point is undefined
486 on both entry and exit; the return value is ignored.
488 The functions are called even when font locking isn't enabled.
490 When the mode is initialized, the functions are called with
494 ;; For documentation see the following c-lang-defvar of the same name.
495 ;; The value here may be a list of functions or a single function.
496 t 'c-change-set-fl-decl-start
498 c-change-set-fl-decl-start)
503 fs
505 "If non-nil, a list of functions called just before font locking.
506 Typically they will extend the region about to be fontified \(see
507 below) and will set `syntax-table' text properties on the region.
509 These functions will be run in the order given. Each of them
510 takes 3 parameters, the BEG, END, and OLD-LEN supplied to every
511 after-change function; point is undefined on both entry and exit;
512 on entry, the buffer will have been widened and match-data will
513 have been saved; the return value is ignored.
515 The functions may extend the region to be fontified by setting the
516 buffer local variables c-new-BEG and c-new-END.
518 The functions are called even when font locking is disabled.
520 When the mode is initialized, these functions are called with
524 awk nil
526 ;; For documentation see the following c-lang-defvar of the same name.
527 ;; The value here may be a list of functions or a single function.
531 fs
533 "If non-nil, a list of functions called just before context (or
534 other non-change) fontification is done. Typically they will
535 extend the region.
537 These functions will be run in the order given. Each of them
538 takes 2 parameters, the BEG and END of the region to be
539 fontified. Point is undefined on both entry and exit. On entry,
540 the buffer will have been widened and match-data will have been
541 saved; the return value is a cons of the adjusted
544 \f
545 ;;; Syntactic analysis ("virtual semicolons") for line-oriented languages (AWK).
548 Such a function takes one optional parameter, a buffer position (defaults to
549 point), and returns nil or t. This variable contains nil for languages which
550 don't have EOL terminated statements. "
551 t nil
558 The (admittedly kludgy) purpose of such a function is to prevent an infinite
559 recursion in c-beginning-of-statement-1 when point starts at a `while' token.
560 The function MUST NOT UNDER ANY CIRCUMSTANCES call c-beginning-of-statement-1,
561 even indirectly. This variable contains nil for languages which don't have
562 EOL terminated statements."
563 t nil
569 \f
570 ;;; Lexer-level syntax (identifiers, tokens etc).
573 "Whether the language has bitfield declarations."
574 t nil
579 "Regexp that matches the start of a symbol, i.e. any identifier or
581 operator at the top level."
589 "Set of characters that can be part of a symbol.
590 This is of the form that fits inside [ ] in a regexp."
591 ;; Pike note: With the backquote identifiers this would include most
592 ;; operator chars too, but they are handled with other means instead.
598 "Regexp matching identifiers and keywords (with submatch 0). Assumed
599 to match if `c-symbol-start' matches on the same position."
603 ;; Use the value from C here since the operator backquote is
604 ;; covered by the other alternative.
612 ;; Number of regexp grouping parens in `c-symbol-key'.
616 "This is the set of chars that can't be part of a symbol, i.e. the
617 negation of `c-symbol-chars'."
622 "Regexp that matches any character that can't be part of a symbol.
623 It's usually appended to other regexps to avoid matching a prefix.
624 It's assumed to not contain any submatchers."
625 ;; The same thing regarding Unicode identifiers applies here as to
626 ;; `c-symbol-key'.
630 "The operators that make up fully qualified identifiers. nil in
631 languages that don't have such things. See `c-operators' for a
632 description of the format. Binary operators can concatenate symbols,
636 This value is by default merged into `c-operators'."
637 t nil
641 ;; Java has "." to concatenate identifiers but it's also used for
642 ;; normal indexing. There's special code in the Java font lock
643 ;; rules to fontify qualified identifiers based on the standard
644 ;; naming conventions. We still define "." here to make
645 ;; `c-forward-name' move over as long names as possible which is
646 ;; necessary to e.g. handle throws clauses correctly.
655 ;; Appendable adorned regexp matching the operators that join
656 ;; symbols to fully qualified identifiers, or nil in languages that
657 ;; don't have such things.
658 ;;
659 ;; This was a docstring constant in 5.30. It still works but is now
660 ;; considered internal - change `c-identifier-ops' instead.
663 t)))
671 ;; Number of regexp grouping parens in `c-opt-identifier-concat-key'.
675 ;; Appendable adorned regexp matching operators that might precede
676 ;; an identifier and that are part of the identifier in that case.
677 ;; nil in languages without such things.
680 t)))
685 "Operators that can occur after a binary operator on `c-identifier-ops'
686 in identifiers. nil in languages that don't have such things.
688 Operators here should also have appropriate entries in `c-operators' -
689 it's not taken care of by default."
690 t nil
691 ;; '~' for destructors in C++, '*' for member pointers.
693 ;; In Java we recognize '*' to deal with "foo.bar.*" that can occur
694 ;; in import declarations. (This will also match bogus things like
695 ;; "foo.*bar" but we don't bother.)
699 ;; Regexp that must match the token after
700 ;; `c-opt-identifier-concat-key' for it to be considered an
701 ;; identifier concatenation operator (which e.g. causes the
702 ;; preceding identifier to be fontified as a reference). Assumed to
703 ;; be a string if `c-opt-identifier-concat-key' is.
704 ;;
705 ;; This was a docstring constant in 5.30. It still works but is now
706 ;; considered internal - change `c-after-id-concat-ops' instead.
714 "Regexp that matches the start of an (optionally qualified) identifier.
715 It should also match all keywords. It's unspecified how far it
716 matches."
726 C++. It does not recognize the full range of syntactic whitespace
727 between the tokens; `c-forward-name' has to be used for that. It
728 should also not match identifiers containing parenthesis groupings,
730 ;; This regexp is more complex than strictly necessary to ensure
731 ;; that it can be matched with a minimum of backtracking.
752 ;; For flexibility, consider the symbol match
753 ;; optional if we've hit a
754 ;; `c-after-id-concat-ops' operator. This is
755 ;; also necessary to handle the "*" that can
756 ;; end import declaration identifiers in Java.
770 ;; This was a docstring constant in 5.30 but it's no longer used.
771 ;; It's only kept to avoid breaking third party code.
772 ;;
773 ;; Used to identify the submatch in `c-identifier-key' that
774 ;; surrounds the last symbol in the qualified identifier. It's a
775 ;; list of submatch numbers, of which the first that has a match is
776 ;; taken. It's assumed that at least one does when the regexp has
777 ;; matched.
778 t nil)
781 "Set if the language support backslash escaped newlines inside string
782 literals."
783 t nil
789 "Set if the language supports multiline string literals without escaped
790 newlines. If t, all string literals are multiline. If a character,
791 only literals where the open quote is immediately preceded by that
792 literal are multiline."
793 t nil
794 pike ?#)
799 "The symbol which starts preprocessor constructs when in the margin."
800 t "#"
805 "Regexp matching the prefix of a cpp directive in the languages that
806 normally use that macro preprocessor. Tested at bol or at boi.
808 ;; TODO (ACM, 2005-04-01). Amend the following to recognize escaped NLs;
809 ;; amend all uses of c-opt-cpp-prefix which count regexp-depth.
815 "Regexp matching the prefix of a cpp directive anchored to BOL,
816 in the languages that have a macro preprocessor."
822 "Regexp matching the prefix of a cpp directive including the directive
823 name, or nil in languages without preprocessor support. The first
824 submatch surrounds the directive name."
828 ;; Pike, being a scripting language, recognizes hash-bangs too.
834 "List of cpp directives (without the prefix) that are followed by a
835 string message."
841 "List of cpp directives (without the prefix) that are followed by a
842 file name in angle brackets or quotes."
848 "Cpp directive (without the prefix) that is followed by a macro
849 definition, or nil if the language doesn't have any."
856 ;; Regexp matching everything up to the macro body of a cpp define, or the
857 ;; end of the logical line if there is none. Submatch 1 is the name of the
858 ;; macro. Set if c-opt-cpp-macro-define is.
863 ;; ^ ^ #defined name
869 ;; Regexp matching everything up to the end of the identifier defined
870 ;; by a cpp define.
879 "List of cpp directives (without the prefix) that are followed by an
880 expression."
885 "Regexp which matches the start of a CPP directive which contains an
886 expression, or nil if there aren't any in the language."
895 "List of functions in cpp expressions."
901 "List of all assignment operators."
907 idl nil)
910 "List describing all operators, along with their precedence and
911 associativity. The order in the list corresponds to the precedence of
912 the operators: The operators in each element are a group with the same
913 precedence, and the group has higher precedence than the groups in all
914 following elements. The car of each element describes the type of the
915 operator group, and the cdr is a list of the operator tokens in it.
916 The operator group types are:
918 'prefix Unary prefix operators.
919 'postfix Unary postfix operators.
920 'postfix-if-paren
921 Unary postfix operators if and only if the chars have
922 parenthesis syntax.
923 'left-assoc Binary left associative operators (i.e. a+b+c means (a+b)+c).
924 'right-assoc Binary right associative operators (i.e. a=b=c means a=(b=c)).
925 'right-assoc-sequence
926 Right associative operator that constitutes of a
927 sequence of tokens that separate expressions. All the
928 tokens in the group are in this case taken as
929 describing the sequence in one such operator, and the
930 order between them is therefore significant.
932 Operators containing a character with paren syntax are taken to match
933 with a corresponding open/close paren somewhere else. A postfix
934 operator with close paren syntax is taken to end a postfix expression
935 started somewhere earlier, rather than start a new one at point. Vice
936 versa for prefix operators with open paren syntax.
939 often are described as postfix operators are considered binary here,
940 since CC Mode treats every identifier as an expression."
942 ;; There's currently no code in CC Mode that exploit all the info
943 ;; in this variable; precedence, associativity etc are present as a
944 ;; preparation for future work.
955 ;; Primary.
964 ;; Postfix.
966 ;; The following need special treatment.
976 ;; Unary.
983 ;; The following need special treatment.
994 ;; Member selection.
998 ;; Multiplicative.
1001 ;; Additive.
1004 ;; Shift.
1009 ;; Relational.
1014 ;; Equality.
1018 ;; Bitwise and.
1022 ;; Bitwise exclusive or.
1028 ;; Bitwise or.
1034 ;; Logical and.
1038 ;; Logical or.
1044 ;; Conditional.
1047 ;; Assignment.
1050 ;; Exception.
1054 ;; Sequence.
1057 ;; IDL got its own definition since it has a much smaller operator
1058 ;; set than the other languages.
1062 ;; Primary.
1064 ;; Unary.
1066 ;; Multiplicative.
1068 ;; Additive.
1070 ;; Shift.
1072 ;; And.
1074 ;; Xor.
1076 ;; Or.
1080 ;; The operators as a flat list (without duplicates).
1086 t nil
1095 ;; These work like identifiers in Pike.
1102 ;; Regexp tested after an "operator" token in C++.
1103 t nil
1109 "Regexp matching the token before the ones in
1110 `c-overloadable-operators' when operators are specified in their
1113 languages without operator functions or where the complete operator
1114 identifier is listed in `c-overloadable-operators'.
1116 This regexp is assumed to not match any non-operator identifier."
1117 t nil
1122 ;; Note: the following alias is an old name which was a mis-spelling. It has
1123 ;; been corrected above and throughout cc-engine.el. It will be removed at
1124 ;; some release very shortly in the future. ACM, 2006-04-14.
1130 "List of the tokens made up of characters in the punctuation or
1131 parenthesis syntax classes that have uses other than as expression
1132 operators."
1150 ;; List of all tokens in the punctuation and parenthesis syntax
1151 ;; classes.
1157 ;; List containing all chars not in the word, symbol or
1158 ;; syntactically irrelevant syntax classes, i.e. all punctuation,
1159 ;; parenthesis and string delimiter chars.
1161 ;; Only go through the chars in the printable ASCII range. No
1162 ;; language so far has 8-bit or widestring operators.
1168 list)))
1171 ;; Regexp matching all tokens in the punctuation and parenthesis
1172 ;; syntax classes. Note that this also matches ".", which can start
1173 ;; a float.
1176 t
1182 ;; Regexp matching all assignment operators and only them. The
1183 ;; beginning of the first submatch is used to detect the end of the
1184 ;; token, along with the end of the whole match.
1187 ;; Need special case for "=" since it's a prefix of "==".
1199 ;; Regexp matching all tokens containing "<" or ">" which are longer
1200 ;; than one char.
1203 t
1209 ;; Regexp matching the second and subsequent characters of all
1210 ;; multicharacter tokens that begin with "<".
1213 t
1220 ;; Regexp matching the second and subsequent characters of all
1221 ;; multicharacter tokens that begin with ">".
1224 t
1229 t
1236 ;; The characters that should be considered to bound statements. To
1237 ;; optimize `c-crosses-statement-barrier-p' somewhat, it's assumed to
1238 ;; begin with "^" to negate the set. If ? : operators should be
1239 ;; detected then the string must end with "?:".
1244 ;; Variant of `c-stmt-delim-chars' that additionally contains ','.
1249 \f
1250 ;;; Syntactic whitespace.
1253 "Regexp matching an ordinary whitespace character.
1255 ;; "\\s " is not enough since it doesn't match line breaks.
1259 ;; Number of regexp grouping parens in `c-simple-ws'.
1263 "String that starts line comments, or nil if such don't exist.
1264 Line comments are always terminated by newlines. At least one of
1265 `c-block-comment-starter' and this one is assumed to be set.
1267 Note that it's currently not enough to set this to support a new
1268 comment style. Other stuff like the syntax table must also be set up
1269 properly."
1270 t "//"
1275 "String that starts block comments, or nil if such don't exist.
1276 Block comments are ended by `c-block-comment-ender', which is assumed
1277 to be set if this is. At least one of `c-line-comment-starter' and
1278 this one is assumed to be set.
1280 Note that it's currently not enough to set this to support a new
1281 comment style. Other stuff like the syntax table must also be set up
1282 properly."
1283 t "/*"
1284 awk nil)
1287 "String that ends block comments, or nil if such don't exist.
1289 Note that it's currently not enough to set this to support a new
1290 comment style. Other stuff like the syntax table must also be set up
1291 properly."
1292 t "*/"
1293 awk nil)
1296 ;; Regexp to match the start of any type of comment.
1302 re)))
1306 ;; Regexp which matches the start of a block comment (if such exists in the
1307 ;; language)
1315 ;; Regexp which matches the start of a line comment (if such exists in the
1316 ;; language; it does in all 7 CC Mode languages).
1324 ;; Regexp to match the start of comments and string literals.
1333 "Regexp to match the start of documentation comments."
1335 ;; From font-lock.el: `doxygen' uses /*! while others use /**.
1343 "String that starts comments inserted with M-; etc.
1344 `comment-start' is initialized from this."
1345 ;; Default: Prefer line comments to block comments, and pad with a space.
1349 ;; In C we still default to the block comment style since line
1350 ;; comments aren't entirely portable.
1355 "String that ends comments inserted with M-; etc.
1356 `comment-end' is initialized from this."
1357 ;; Default: Use block comment style if comment-start uses block
1358 ;; comments, and pad with a space in that case.
1368 "Regexp to match the start of a comment plus everything up to its body.
1369 `comment-start-skip' is initialized from this."
1370 ;; Default: Allow the last char of the comment starter(s) to be
1371 ;; repeated, then allow any amount of horizontal whitespace.
1384 ;; Regexp matching any sequence that can start syntactic whitespace.
1385 ;; The only uncertain case is '#' when there are cpp directives.
1399 ;; Regexp matching any single character that might end syntactic whitespace.
1414 ;; Regexp matching an unterminated block comment that doesn't
1415 ;; contain line breaks, or nil in languages without block comments.
1416 ;; Does not contain a \| operator at the top level.
1420 ;; It's messy to cook together a regexp that matches anything
1421 ;; but c-block-comment-ender.
1429 "[^"
1430 ;; The quoting rules inside char classes are silly. :P
1439 "]"
1447 ;; Regexp matching a block comment that doesn't contain line breaks,
1448 ;; or nil in languages without block comments. The reason we don't
1449 ;; allow line breaks is to avoid going very far and risk running out
1450 ;; of regexp stack; this regexp is intended to handle only short
1451 ;; comments that might be put in the middle of limited constructs
1452 ;; like declarations. Does not contain a \| operator at the top
1453 ;; level.
1468 ;; Regexp matching a piece of syntactic whitespace that isn't a
1469 ;; sequence of simple whitespace characters. As opposed to
1470 ;; `c-(forward|backward)-syntactic-ws', this doesn't regard cpp
1471 ;; directives as syntactic whitespace.
1483 ;; Regexp matching syntactic whitespace, including possibly the
1484 ;; empty string. As opposed to `c-(forward|backward)-syntactic-ws',
1485 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1486 ;; not contain a \| operator at the top level.
1494 ;; Number of regexp grouping parens in `c-syntactic-ws'.
1498 ;; Regexp matching syntactic whitespace, which is at least one
1499 ;; character long. As opposed to `c-(forward|backward)-syntactic-ws',
1500 ;; this doesn't regard cpp directives as syntactic whitespace. Does
1501 ;; not contain a \| operator at the top level.
1509 ;; Number of regexp grouping parens in `c-nonempty-syntactic-ws'.
1513 ;; Regexp matching syntactic whitespace without any line breaks. As
1514 ;; opposed to `c-(forward|backward)-syntactic-ws', this doesn't
1515 ;; regard cpp directives as syntactic whitespace. Does not contain
1516 ;; a \| operator at the top level.
1524 ;; Number of regexp grouping parens in `c-single-line-syntactic-ws'.
1528 ;; Regexp that matches when there is no syntactically significant
1529 ;; text before eol. Macros are regarded as syntactically
1530 ;; significant text here.
1532 ;; Match eol (possibly inside a block comment or preceded
1533 ;; by a line continuation backslash), or the beginning of a
1534 ;; line comment. Note: This has to be modified for awk
1535 ;; where line comments start with '#'.
1549 \f
1550 ;;; Defun functions
1552 ;; The Emacs variables beginning-of-defun-function and
1553 ;; end-of-defun-function will be set so that commands like
1554 ;; `mark-defun' and `narrow-to-defun' work right. The key sequences
1555 ;; C-M-a and C-M-e are, however, bound directly to the CC Mode
1556 ;; functions, allowing optimization for large n.
1558 "Function to which beginning-of-defun-function will be set."
1559 t 'c-beginning-of-defun
1565 "Function to which end-of-defun-function will be set."
1566 t 'c-end-of-defun
1569 \f
1570 ;;; In-comment text handling.
1573 "Regexp to append to `paragraph-start'."
1574 t "$"
1580 "Regexp to append to `paragraph-separate'."
1581 t "$"
1585 \f
1586 ;;; Keyword lists.
1588 ;; Note: All and only all language constants containing keyword lists
1589 ;; should end with "-kwds"; they're automatically collected into the
1590 ;; `c-kwds-lang-consts' list below and used to build `c-keywords' etc.
1593 "Primitive type keywords. As opposed to the other keyword lists, the
1594 keywords listed here are fontified with the type face instead of the
1595 keyword face.
1597 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1598 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1599 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1600 will be handled.
1602 Do not try to modify this list for end user customizations; the
1603 `*-font-lock-extra-types' variable, where `*' is the mode prefix, is
1604 the appropriate place for that."
1613 ;; Objective-C extends C, but probably not the new stuff in C99.
1620 ;; In CORBA PSDL:
1621 "ref"
1622 ;; The following can't really end a type, but we have to specify them
1623 ;; here due to the assumption in `c-primitive-type-prefix-kwds'. It
1624 ;; doesn't matter that much.
1627 ;; used as a builtin type.
1632 ;; An adorned regexp that matches `c-primitive-type-kwds'.
1637 "Keywords that might act as prefixes for primitive types. Assumed to
1638 be a subset of `c-primitive-type-kwds'."
1639 t nil
1642 ;; In CORBA PSDL:
1647 of a variable declaration."
1652 ;; Adorned regexp matching `c-typedef-kwds'.
1657 "Keywords where the following name - if any - is a type name, and
1658 where the keyword together with the symbol works as a type in
1659 declarations.
1661 Note that an alternative if the second part doesn't hold is
1662 `c-type-list-kwds'. Keywords on this list are typically also present
1663 on one of the `*-decl-kwds' lists."
1664 t nil
1670 ;; Adorned regexp matching `c-type-prefix-kwds'.
1675 "Type modifier keywords. These can occur almost anywhere in types
1676 but they don't build a type of themselves. Unlike the keywords on
1677 `c-primitive-type-kwds', they are fontified with the keyword face and
1678 not the type face."
1679 t nil
1685 ;; Adorned regexp matching `c-type-modifier-kwds', or nil in
1686 ;; languages without such keywords.
1692 ;; An adorned regexp that matches `c-primitive-type-prefix-kwds' and
1693 ;; `c-type-modifier-kwds', or nil in languages without any of them.
1703 ;; All keywords that can start a type (i.e. are either a type prefix
1704 ;; or a complete type).
1711 "Keywords introducing declarations where the following block (if any)
1712 contains another declaration level that should be considered a class.
1714 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1715 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1716 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1717 will be handled.
1719 Note that presence on this list does not automatically treat the
1720 following identifier as a type; the keyword must also be present on
1721 `c-type-prefix-kwds' or `c-type-list-kwds' to accomplish that."
1722 t nil
1730 ;; In CORBA PSDL:
1732 ;; In CORBA CIDL:
1737 ;; Regexp matching the start of a class.
1742 "Keywords introducing declarations where the following block (if
1743 any) is a brace list.
1745 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1746 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1747 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1748 will be handled."
1753 ;; Regexp matching the start of declarations where the following
1754 ;; block is a brace list.
1759 "Keywords where the following block (if any) contains another
1760 declaration level that should not be considered a class. For every
1761 keyword here, CC Mode will add a set of special syntactic symbols for
1763 `foo-open', `foo-close', and `infoo' symbols.
1765 The intention is that this category should be used for block
1766 constructs that aren't related to object orientation concepts like
1767 classes (which thus also include e.g. interfaces, templates,
1768 contracts, structs, etc). The more pragmatic distinction is that
1769 while most want some indentation inside classes, it's fairly common
1770 that they don't want it in some of these constructs, so it should be
1771 simple to configure that differently from classes. See also
1772 `c-class-decl-kwds'.
1774 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1775 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1776 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1777 will be handled."
1778 t nil
1782 ;; In CORBA CIDL:
1786 ;; Regexp matching the start of blocks besides classes that contain
1787 ;; another declaration level.
1796 'inextern-lang
1799 "Alist associating keywords in c-other-decl-block-decl-kwds with
1803 "Keywords introducing declarations where the identifier(s) being
1804 declared are types.
1806 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1807 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1808 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1809 will be handled."
1810 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1811 ;; (since e.g. "Foo" is a type that's being defined in "class Foo
1812 ;; {...}").
1815 ;; Languages that have a "typedef" construct.
1818 ;; Unlike most other languages, exception names are not handled as
1819 ;; types in IDL since they only can occur in "raises" specs.
1827 "Keywords introducing declarations where the \(first) identifier
1828 \(declarator) follows directly after the keyword, without any type.
1830 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1831 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1832 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1833 will be handled."
1834 ;; Default to `c-class-decl-kwds' and `c-brace-list-decl-kwds'
1835 ;; (since e.g. "Foo" is the identifier being defined in "class Foo
1836 ;; {...}").
1839 ;; Note: "manages" for CORBA CIDL clashes with its presence on
1840 ;; `c-type-list-kwds' for IDL.
1843 ;; In CORBA PSDL:
1845 ;; In CORBA CIDL:
1851 "Keywords that can prefix normal declarations of identifiers
1852 \(and typically act as flags). Things like argument declarations
1853 inside function headers are also considered declarations in this
1854 sense.
1856 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1857 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1858 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1859 will be handled."
1860 t nil
1865 ;; FIXME: Some of those below ought to be on `c-other-decl-kwds' instead.
1869 ;; In CORBA PSDL:
1871 ;; In CORBA CIDL:
1873 ;; Note: "const" is not used in Java, but it's still a reserved keyword.
1880 "Keywords that can start or prefix any declaration level construct,
1881 besides those on `c-class-decl-kwds', `c-brace-list-decl-kwds',
1882 `c-other-block-decl-kwds', `c-typedef-decl-kwds',
1883 `c-typeless-decl-kwds' and `c-modifier-kwds'.
1885 If any of these also are on `c-type-list-kwds', `c-ref-list-kwds',
1886 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1887 `c-<>-type-kwds', or `c-<>-arglist-kwds' then the associated clauses
1888 will be handled."
1889 t nil
1895 "Keywords that always start declarations, wherever they occur.
1896 This can be used for declarations that aren't recognized by the normal
1897 combination of `c-decl-prefix-re' and `c-decl-start-re'."
1898 t nil
1899 ;; Classes can be declared anywhere in a Pike expression.
1903 "Keywords that can occur anywhere in a declaration level construct.
1904 This is used for self-contained things that can be tacked on anywhere
1905 on a declaration and that should be ignored to be able to recognize it
1906 correctly. Typical cases are compiler extensions like
1909 __declspec(noreturn) void foo();
1910 class __declspec(dllexport) classname {...};
1911 void foo() __attribute__((noreturn));
1913 Note that unrecognized plain symbols are skipped anyway if they occur
1914 before the type, so such things are not necessary to mention here.
1915 Mentioning them here is necessary only if they can occur in other
1916 places, or if they are followed by a construct that must be skipped
1918 examples above). In the last case, they alse need to be present on
1919 one of `c-type-list-kwds', `c-ref-list-kwds',
1920 `c-colon-type-list-kwds', `c-paren-nontype-kwds', `c-paren-type-kwds',
1921 `c-<>-type-kwds', or `c-<>-arglist-kwds'."
1922 ;; NB: These are currently not recognized in all parts of a
1923 ;; declaration. Specifically, they aren't recognized in the middle
1924 ;; of multi-token types, inside declarators, and between the
1925 ;; identifier and the arglist paren of a function declaration.
1926 ;;
1927 ;; FIXME: This ought to be user customizable since compiler stuff
1928 ;; like this usually is wrapped in project specific macros. (It'd
1929 ;; of course be even better if we could cope without knowing this.)
1930 t nil
1932 "__attribute__"
1933 ;; MSVC extension.
1937 ;; Adorned regexp matching `c-decl-hangon-kwds'.
1942 ;; All keywords that can occur in the preamble of a declaration.
1943 ;; They typically occur before the type, but they are also matched
1944 ;; after presumptive types since we often can't be sure that
1945 ;; something is a type or just some sort of macro in front of the
1946 ;; declaration. They might be ambiguous with types or type
1947 ;; prefixes.
1960 ;; Adorned regexp of `c-prefix-spec-kwds'.
1966 ;; Adorned regexp of the keywords in `c-prefix-spec-kwds' that aren't
1967 ;; ambiguous with types or type prefixes. These are the keywords (like
1968 ;; extern, namespace, but NOT template) that can modify a declaration.
1977 ;; Keywords that can occur after argument list of a function header
1978 ;; declaration, i.e. in the "K&R region".
1983 ;; Adorned regexp matching all keywords that can't appear at the
1984 ;; start of a declaration.
1998 ;; The "more" for C++ is the QT keyword (as in "more slots:").
1999 ;; This variable is intended for use in c-beginning-of-statement-1.
2009 "Access protection label keywords in classes."
2010 t nil
2015 "Keywords introducing declarations that can contain a block which
2018 like that, it ends with the following ';' and not right away.
2020 The keywords on list are assumed to also be present on one of the
2021 `*-decl-kwds' lists."
2022 t nil
2027 ;; Regexp matching the `c-block-decls-with-vars' keywords, or nil in
2028 ;; languages without such constructs.
2035 "Keywords introducing extra declaration specifiers in the region
2037 declarations."
2038 t nil
2041 "supports"
2042 ;; In CORBA PSDL:
2046 ;; Regexp matching the keywords in `c-postfix-decl-spec-kwds'.
2052 "Keywords that may be followed by a nonsymbol sexp before whatever
2053 construct it's part of continues."
2054 t nil
2058 "Keywords that may be followed by a comma separated list of type
2059 identifiers, where each optionally can be prefixed by keywords. (Can
2060 also be used for the special case when the list can contain only one
2061 element.)
2063 Assumed to be mutually exclusive with `c-ref-list-kwds'. There's no
2064 reason to put keywords on this list if they are on `c-type-prefix-kwds'.
2065 There's also no reason to add keywords that prefixes a normal
2066 declaration consisting of a type followed by a declarator (list), so
2067 the keywords on `c-modifier-kwds' should normally not be listed here
2068 either.
2070 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2071 or variable identifier (that's being defined)."
2072 t nil
2077 ;; In CORBA PSDL:
2082 "Keywords that may be followed by a comma separated list of
2083 reference (i.e. namespace/scope/module) identifiers, where each
2084 optionally can be prefixed by keywords. (Can also be used for the
2085 special case when the list can contain only one element.) Assumed to
2086 be mutually exclusive with `c-type-list-kwds'.
2088 Note: Use `c-typeless-decl-kwds' for keywords followed by a function
2089 or variable identifier (that's being defined)."
2090 t nil
2094 ;; In CORBA CIDL:
2099 "Keywords that may be followed (not necessarily directly) by a colon
2100 and then a comma separated list of type identifiers, where each
2101 optionally can be prefixed by keywords. (Can also be used for the
2102 special case when the list can contain only one element.)"
2103 t nil
2106 ;; In CORBA PSDL:
2110 "Regexp matched after the keywords in `c-colon-type-list-kwds' to skip
2111 forward to the colon. The end of the match is assumed to be directly
2113 regexp if `c-colon-type-list-kwds' isn't nil."
2115 ;; Disallow various common punctuation chars that can't come
2116 ;; before the ":" that starts the inherit list after "class"
2117 ;; or "struct" in C++. (Also used as default for other
2118 ;; languages.)
2123 "Keywords that may be followed by a parenthesis expression that doesn't
2124 contain type identifiers."
2125 t nil
2127 "__attribute__"
2128 ;; MSVC extension.
2132 "Keywords that may be followed by a parenthesis expression containing
2133 type identifiers separated by arbitrary tokens."
2134 t nil
2146 "Keywords that may be followed by an angle bracket expression
2148 `c-<>-arglist-kwds' is that unknown names are taken to be types and
2149 not other identifiers. `c-recognize-<>-arglists' is assumed to be set
2150 if this isn't nil."
2151 t nil
2154 ;; In CORBA PSDL:
2158 "Keywords that can be followed by a C++ style template arglist; see
2159 `c-recognize-<>-arglists' for details. That language constant is
2160 assumed to be set if this isn't nil."
2161 t nil
2166 ;; All keywords that can be followed by an angle bracket sexp.
2172 ;; Adorned regexp matching keywords that can be followed by an angle
2173 ;; bracket sexp. Always set when `c-recognize-<>-arglists' is.
2178 "Keywords that may be followed by a brace block containing a comma
2179 separated list of identifier definitions, i.e. like the list of
2180 identifiers that follows the type in a normal declaration."
2184 "Statement keywords followed directly by a substatement."
2189 idl nil)
2192 ;; Regexp matching the start of any statement followed directly by a
2193 ;; substatement (doesn't match a bare block, however).
2198 "Statement keywords optionally followed by a paren sexp.
2199 Keywords here should also be in `c-block-stmt-1-kwds'."
2200 t nil
2204 ;; Regexp matching the start of a statement which may be followed by a
2205 ;; paren sexp and will then be followed by a substatement.
2210 "Statement keywords followed by a paren sexp and then by a substatement."
2215 idl nil
2220 ;; Regexp matching the start of any statement followed by a paren sexp
2221 ;; and then by a substatement.
2226 ;; Union of `c-block-stmt-1-kwds' and `c-block-stmt-2-kwds'.
2232 ;; Regexp matching the start of any statement that has a
2233 ;; substatement (except a bare block). Nil in languages that
2234 ;; don't have such constructs.
2243 "Statement keywords followed by an expression or nothing."
2246 ;; Note: `goto' is not valid in Java, but the keyword is still reserved.
2248 idl nil
2255 ;; Adorned regexp matching `c-simple-stmt-kwds'.
2260 "Statement keywords followed by a parenthesis expression that
2261 nevertheless contains a list separated with ';' and not ','."
2263 idl nil)
2266 ;; Adorned regexp matching `c-paren-stmt-kwds'.
2271 "Statement keywords followed by an assembler expression."
2272 t nil
2276 ;; Regexp matching the start of an assembler statement. Nil in
2277 ;; languages that don't support that.
2286 awk nil)
2289 ;; Adorned regexp matching any "case"-like keyword.
2294 "Keywords introducing colon terminated labels in blocks."
2298 ;; Adorned regexp matching any keyword that introduces a label.
2303 "Keywords that might be followed by a label identifier."
2307 idl nil
2308 awk nil)
2311 "Keywords for constants."
2312 t nil
2321 "Keywords besides constants and operators that start primary expressions."
2322 t nil
2329 ;; Keywords that can occur anywhere in expressions. Built from
2330 ;; `c-primary-expr-kwds' and all keyword operators in `c-operators'.
2334 t
2339 "Keywords that start lambda constructs, i.e. function definitions in
2340 expressions."
2341 t nil
2345 "Keywords that start constructs followed by statement blocks which can
2346 be used in expressions \(the gcc extension for this in C and C++ is
2347 handled separately by `c-recognize-paren-inexpr-blocks')."
2348 t nil
2352 "Keywords that can start classes inside expressions."
2353 t nil
2358 "Keywords that can start brace list blocks inside expressions.
2359 Note that Java specific rules are currently applied to tell this from
2360 `c-inexpr-class-kwds'."
2361 t nil
2365 ;; Regexp matching the start of a brace list in an expression, or
2366 ;; nil in languages that don't have such things. This should not
2367 ;; match brace lists recognized through `c-special-brace-lists'.
2374 ;; Regexp matching keywords in any construct that contain another
2375 ;; declaration level, i.e. that isn't followed by a function block
2376 ;; or brace list. When the first submatch matches, it's an
2377 ;; unambiguous construct, otherwise it's an ambiguous match that
2378 ;; might also be the return type of a function declaration.
2396 "Keywords that can introduce bitfields."
2397 t nil
2401 ;; Regexp matching the start of a bitfield (not uniquely), or nil in
2402 ;; languages without bitfield support.
2403 t nil
2408 "Keywords not accounted for by any other `*-kwds' language constant."
2409 t nil
2411 ;; In CORBA CIDL: (These are declaration keywords that never
2412 ;; can start a declaration.)
2415 \f
2416 ;;; Constants built from keywords.
2418 ;; Note: No `*-kwds' language constants may be defined below this point.
2422 ;; List of all the language constants that contain keyword lists.
2427 ;; Make the list of globally interned symbols
2428 ;; instead of ones interned in `c-lang-constants'.
2430 c-lang-constants)
2431 list)))
2434 ;; All keywords as a list.
2439 c-kwds-lang-consts)
2440 nil))
2444 ;; All keywords as an adorned regexp.
2449 ;; An alist with all the keywords in the cars. The cdr for each
2450 ;; keyword is a list of the symbols for the `*-kwds' lists that
2451 ;; contains it.
2457 c-kwds-lang-consts))))
2458 lang-const kwd-list kwd
2459 result-alist elem)
2471 result-alist))
2474 ;; An obarray containing all keywords as symbols. The property list
2475 ;; of each symbol has a non-nil entry for the specific `*-kwds'
2476 ;; lists it's a member of.
2477 ;;
2478 ;; E.g. to see whether the string str contains a keyword on
2479 ;; `c-class-decl-kwds', one can do like this:
2480 ;; (get (intern-soft str c-keyword-obarray) 'c-class-decl-kwds)
2481 ;; Which preferably is written using the associated functions in
2482 ;; cc-engine:
2483 ;; (c-keyword-member (c-keyword-sym str) 'c-class-decl-kwds)
2485 ;; The obarray is not stored directly as a language constant since
2486 ;; the printed representation for obarrays used in .elc files isn't
2487 ;; complete.
2490 kwd lang-const-list
2497 ;; Emacs has an odd bug that causes `mapcan' to fail
2498 ;; with unintelligible errors. (XEmacs works.)
2499 ;;(mapcan (lambda (lang-const)
2500 ;; (list lang-const t))
2501 ;; lang-const-list)
2504 lang-const-list))))
2505 obarray))
2508 ;; Adorned regexp matching all keywords that should be fontified
2509 ;; with the keywords face. I.e. that aren't types or constants.
2519 ;; Regexp matching the start of any primary expression, i.e. any
2520 ;; literal, symbol, prefix operator, and '('. It doesn't need to
2521 ;; exclude keywords; they are excluded afterwards unless the second
2522 ;; submatch matches. If the first but not the second submatch
2523 ;; matches then it is an ambiguous primary expression; it could also
2524 ;; be a match of e.g. an infix operator. (The case with ambiguous
2525 ;; keyword operators isn't handled.)
2531 ;; Filter out the special case prefix
2532 ;; operators that are close parens.
2537 t
2543 postfix-if-paren
2544 left-assoc
2545 right-assoc
2546 right-assoc-sequence)
2547 t))
2550 in-or-postfix-ops
2553 in-or-postfix-ops
2558 ;; Take out all symbol class operators from `prefix-ops' and make the
2559 ;; first submatch from them together with `c-primary-expr-kwds'.
2566 ;; Match all ambiguous operators.
2573 ;; Now match all other symbols.
2577 ;; The chars that can start integer and floating point
2578 ;; constants.
2582 ;; The unambiguous operators from `prefix-ops'.
2588 ;; Match string and character literals.
2595 \f
2596 ;;; Additional constants for parser-level constructs.
2599 "Regexp matching a keyword that is followed by a colon, where
2600 the whole construct can precede a declaration.
2608 "Regexp matching something that might precede a declaration, cast or
2609 label, such as the last token of a preceding statement or declaration.
2610 This is used in the common situation where a declaration or cast
2611 doesn't start with any specific token that can be searched for.
2613 The regexp should not match bob; that is done implicitly. It can't
2614 require a match longer than one token. The end of the token is taken
2615 to be at the end of the first submatch, which is assumed to always
2616 match. It's undefined whether identifier syntax (see
2617 `c-identifier-syntax-table') is in effect or not. This regexp is
2618 assumed to be a superset of `c-label-prefix-re' if
2619 `c-recognize-colon-labels' is set.
2621 Besides this, `c-decl-start-kwds' is used to find declarations.
2623 Note: This variable together with `c-decl-start-re' and
2625 declaration/cast/label starts. I.e. they might produce more matches
2626 but should not miss anything (or else it's necessary to use text
2627 properties - see the next note). Wherever they match, the following
2628 construct is analyzed to see if it indeed is a declaration, cast or
2629 label. That analysis is not cheap, so it's important that not too
2630 many false matches are triggered.
2632 Note: If a declaration/cast/label start can't be detected with this
2633 variable, it's necessary to use the `c-type' text property with the
2634 value `c-decl-end' on the last char of the last token preceding the
2635 declaration. See the comment blurb at the start of cc-engine.el for
2636 more info."
2638 ;; We match a sequence of characters to skip over things like \"};\"
2639 ;; more quickly. We match ")" in C for K&R region declarations, and
2640 ;; in all languages except Java for when a cpp macro definition
2641 ;; begins with a declaration.
2644 ;; Match "<" in C++ to get the first argument in a template arglist.
2645 ;; In that case there's an additional check in `c-find-decl-spots'
2646 ;; that it got open paren syntax. Match ":" to aid in picking up
2647 ;; "public:", etc. This involves additional checks in
2648 ;; `c-find-decl-prefix-search' to prevent a match of identifiers
2649 ;; or labels.
2651 ;; Additionally match the protection directives in Objective-C.
2652 ;; Note that this doesn't cope with the longer directives, which we
2653 ;; would have to match from start to end since they don't end with
2654 ;; any easily recognized characters.
2658 ;; Pike is like C but we also match "[" for multiple value
2659 ;; assignments and type casts.
2665 "Regexp matching the start of any declaration, cast or label.
2666 It's used on the token after the one `c-decl-prefix-re' matched. This
2667 regexp should not try to match those constructs accurately as it's
2668 only used as a sieve to avoid spending more time checking other
2669 constructs."
2674 ;; Regexp matching something that might precede or start a
2675 ;; declaration, cast or label.
2676 ;;
2677 ;; If the first submatch matches, it's taken to match the end of a
2678 ;; token that might precede such a construct, e.g. ';', '}' or '{'.
2679 ;; It's built from `c-decl-prefix-re'.
2680 ;;
2681 ;; If the first submatch did not match, the match of the whole
2682 ;; regexp is taken to be at the first token in the declaration.
2683 ;; `c-decl-start-re' is not checked in this case.
2684 ;;
2685 ;; Design note: The reason the same regexp is used to match both
2686 ;; tokens that precede declarations and start them is to avoid an
2687 ;; extra regexp search from the previous declaration spot in
2688 ;; `c-find-decl-spots'. Users of `c-find-decl-spots' also count on
2689 ;; that it finds all declaration/cast/label starts in approximately
2690 ;; linear order, so we can't do the searches in two separate passes.
2701 ;; List containing the paren characters that can open a cast, or nil in
2702 ;; languages without casts.
2710 "List of syntactically relevant characters that never can occur before
2711 the open brace in any construct that contains a brace block, e.g. in
2714 class Foo: public Bar {int x();} a, *b;
2716 If parens can occur, the chars inside those aren't filtered with this
2717 list.
2719 '<' and '>' should be disallowed even if angle bracket arglists can
2720 occur. That since the search function needs to stop at them anyway to
2721 ensure they are given paren syntax.
2723 This is used to skip backward from the open brace to find the region
2726 possible for good performance."
2728 ;; Default to all chars that only occurs in nonsymbol tokens outside
2729 ;; identifiers.
2735 t
2736 t
2740 op pos)
2743 res))))
2745 ;; Allow cpp operations (where applicable).
2751 ;; Allow ':' for inherit list starters.
2755 ;; Allow ',' for multiple inherits.
2759 ;; Allow parentheses for anonymous inner classes in Java and class
2760 ;; initializer lists in Pike.
2764 ;; Allow '"' for extern clauses (e.g. extern "C" {...}).
2769 ;; `c-block-prefix-disallowed-chars' as an inverted charset suitable
2770 ;; for `c-syntactic-skip-backward'.
2775 "Regexp matching the declarator operators that might precede the
2778 The end of the first submatch is taken as the end of the operator.
2779 Identifier syntax is in effect when this is matched \(see
2780 `c-identifier-syntax-table')."
2783 ;; Default to a regexp that never matches.
2785 ;; Check that there's no "=" afterwards to avoid matching tokens
2786 ;; like "*=".
2788 "[*\(]"
2794 "[*\(&]"
2799 ;; If this matches there's special treatment in
2800 ;; `c-font-lock-declarators' and
2801 ;; `c-font-lock-declarations' that check for a
2802 ;; complete name followed by ":: *".
2812 "Regexp matching the declarator operators that might follow after the
2815 it matches an open paren of some kind, the type declaration check
2816 continues at the corresponding close paren, otherwise the end of the
2817 first submatch is taken as the end of the operator. Identifier syntax
2818 is in effect when this is matched (see `c-identifier-syntax-table')."
2819 ;; Default to a regexp that matches `c-type-modifier-kwds' and a
2820 ;; function argument list parenthesis.
2828 "[\)\[\(]"
2832 ;; "throw" in `c-type-modifier-kwds' is followed
2833 ;; by a parenthesis list, but no extra measures
2834 ;; are necessary to handle that.
2845 "This regexp is matched after a declarator expression where
2846 `c-type-decl-suffix-key' has matched. If it matches then the
2847 construct is taken as a declaration. It's typically used to match the
2848 beginning of a function body or whatever might occur after the
2849 function header in a function declaration or definition. It's
2850 undefined whether identifier syntax (see `c-identifier-syntax-table')
2851 is in effect or not.
2856 t "{"
2857 ;; If K&R style declarations should be recognized then one could
2858 ;; consider to match the start of any symbol since we want to match
2859 ;; the start of the first declaration in the "K&R region". That
2860 ;; could however produce false matches on code like "FOO(bar) x"
2861 ;; where FOO is a cpp macro, so it's better to leave it out and rely
2862 ;; on the other heuristics in that case.
2864 ;; Add on the keywords in `c-postfix-spec-kwds'.
2869 ;; Also match the colon that starts a base class initializer list in
2870 ;; C++. That can be confused with a function call before the colon
2871 ;; in a ? : operator, but we count on that `c-decl-prefix-re' won't
2872 ;; match before such a thing (as a declaration-level construct;
2873 ;; matches inside arglist contexts are already excluded).
2880 ;; Regexp that in addition to `c-after-suffixed-type-decl-key'
2881 ;; matches ";" and ",".
2890 end of the operator. nil in languages without such operators. It's
2891 undefined whether identifier syntax (see `c-identifier-syntax-table')
2892 is in effect or not."
2893 t nil
2899 "Regexp matching operators that might follow after a type, or nil in
2900 languages that don't have such operators. The end of the first
2901 submatch is taken as the end of the operator. This should not match
2902 things like C++ template arglists if `c-recognize-<>-arglists' is set.
2903 It's undefined whether identifier syntax (see `c-identifier-syntax-table')
2904 is in effect or not."
2905 t nil
2911 ;; Regexp matching the known type identifiers. This is initialized
2912 ;; from the type keywords and `*-font-lock-extra-types'. The first
2913 ;; submatch is the one that matches the type. Note that this regexp
2914 ;; assumes that symbol constituents like '_' and '$' have word
2915 ;; syntax.
2924 extra-types)))
2930 extra-types))))
2935 plain-strings)))
2936 regexp-strings)
2941 "List of open- and close-chars that makes up a pike-style brace list,
2943 list."
2944 t nil
2949 "Non-nil means K&R style argument declarations are valid."
2950 t nil
2951 c t)
2955 "Non-nil means function declarations without return type should be
2956 recognized. That can introduce an ambiguity with parenthesized macro
2957 calls before a brace block. This setting does not affect declarations
2958 that are preceded by a declaration starting keyword, so
2959 e.g. `c-typeless-decl-kwds' may still be used when it's set to nil."
2960 t nil
2966 "Non-nil means C++ style template arglists should be handled. More
2967 specifically, this means a comma separated list of types or
2969 identifier or one of the keywords on `c-<>-type-kwds' or
2970 `c-<>-arglist-kwds'. If there's an identifier before then the whole
2971 expression is considered to be a type."
2974 java t)
2978 "Non-nil means that an enum structure can contain declarations."
2979 t nil
2980 java t)
2984 "Non-nil means that parenthesis style initializers exist,
2985 i.e. constructs like
2987 Foo bar (gnu);
2989 in addition to the more classic
2991 Foo bar = gnu;"
2992 t nil
2997 "Non-nil to recognize gcc style in-expression blocks,
2998 i.e. compound statements surrounded by parentheses inside expressions."
2999 t nil
3005 ;; Regexp matching the start of angle bracket arglists in languages
3006 ;; where `c-recognize-<>-arglists' is set. Does not exclude
3007 ;; keywords outside `c-<>-arglist-kwds'. The first submatch is
3008 ;; assumed to surround the preceding symbol. The whole match is
3009 ;; assumed to end directly after the opening "<".
3019 ;; Regexp that in addition to `c-opt-<>-arglist-start' matches close
3020 ;; parens. The first submatch is assumed to surround
3021 ;; `c-opt-<>-arglist-start'.
3030 ;; Regexp matching the beginning of a declaration specifier in the
3031 ;; region between the header and the body of a declaration.
3032 ;;
3033 ;; TODO: This is currently not used uniformly; c++-mode and
3034 ;; java-mode each have their own ways of using it.
3035 t nil
3048 That includes labels in code and access keys in classes. This does
3049 not apply to labels recognized by `c-label-kwds' and
3050 `c-opt-extra-label-key'."
3051 t nil
3057 "Regexp like `c-decl-prefix-re' that matches any token that can precede
3058 a generic colon label. Not used if `c-recognize-colon-labels' is
3059 nil."
3065 "Regexp matching things that can't occur in generic colon labels,
3066 neither in a statement nor in a declaration context. The regexp is
3067 tested at the beginning of every sexp in a suspected label,
3070 ;; All keywords except `c-label-kwds' and `c-protection-kwds'.
3076 ;; Don't allow string literals, except in AWK. Character constants are OK.
3079 ;; Also check for open parens in C++, to catch member init lists in
3080 ;; constructors. We normally allow it so that macros with arguments
3081 ;; work in labels.
3086 "Regexp matching things that can't occur two symbols before a colon in
3094 "Optional regexp matching labels.
3095 Normally, labels are detected according to `c-nonlabel-token-key',
3096 `c-decl-prefix-re' and `c-nonlabel-decl-prefix-re'. This regexp can
3097 be used if there are additional labels that aren't recognized that
3098 way."
3099 t nil
3104 ;; Regexp describing friend declarations classes, or nil in
3105 ;; languages that don't have such things.
3106 ;;
3107 ;; TODO: Ought to use `c-prefix-spec-kwds-re' or similar, and the
3108 ;; template skipping isn't done properly. This will disappear soon.
3109 t nil
3114 "<.+>"
3116 "friend"
3121 ;; Special regexp to match the start of Objective-C methods. The
3122 ;; first submatch is assumed to end after the + or - key.
3123 t nil
3125 ;; TODO: Ought to use a better method than anchoring on bol.
3130 "([^\)]*)"
3137 ;; Must be set in buffers where the `c-type' text property might be
3138 ;; used with the value `c-decl-end'.
3139 ;;
3140 ;; `c-decl-end' is used to mark the ends of labels and access keys
3141 ;; to make interactive refontification work better.
3144 ;; `c-decl-end' is used to mark the end of the @-style directives in
3145 ;; Objective-C.
3146 objc t)
3149 \f
3150 ;;; Wrap up the `c-lang-defvar' system.
3152 ;; Compile in the list of language variables that has been collected
3153 ;; with the `c-lang-defvar' and `c-lang-setvar' macros. Note that the
3154 ;; first element of each is nil.
3158 ;; Make the `c-lang-setvar' variables buffer local in the current buffer.
3159 ;; These are typically standard emacs variables such as `comment-start'.
3167 "Create a function that initializes all the language dependent variables
3168 for the given mode.
3170 This function should be evaluated at compile time, so that the
3171 function it returns is byte compiled with all the evaluated results
3172 from the language constants. Use the `c-init-language-vars' macro to
3173 accomplish that conveniently."
3179 ;; No need to byte compile this lambda since the byte compiler is
3180 ;; smart enough to detect the `funcall' construct in the
3181 ;; `c-init-language-vars' macro below and compile it all straight
3182 ;; into the function that contains `c-init-language-vars'.
3185 ;; This let sets up the context for `c-mode-var' and similar
3186 ;; that could be in the result from `cl-macroexpand-all'.
3188 current-var source-eval)
3195 ;; `c-lang-const' will expand to the evaluated
3196 ;; constant immediately in `cl-macroexpand-all'
3197 ;; below.
3203 ;; Note: The following `append' copies the
3204 ;; first argument. That list is small, so
3205 ;; this doesn't matter too much.
3209 ;; This diagnostic message isn't useful for end
3210 ;; users, so it's disabled.
3211 ;;(unless (get ',mode 'c-has-warned-lang-consts)
3212 ;; (message ,(concat "%s compiled with CC Mode %s "
3213 ;; "but loaded with %s - evaluating "
3214 ;; "language constants from source")
3215 ;; ',mode ,c-version c-version)
3216 ;; (put ',mode 'c-has-warned-lang-consts t))
3229 current-var
3232 (fallback source eval - %s compiled with CC Mode %s but loaded with %s)"
3235 err)
3238 ;; Being evaluated from source. Always use the dynamic method to
3239 ;; work well when `c-lang-defvar's in this file are reevaluated
3240 ;; interactively.
3246 current-var)
3258 "Eval error in the `c-lang-defvar' or `c-lang-setver' for `%s' (source eval): %S"
3259 current-var err)
3261 ))
3264 "Initialize all the language dependent variables for the given mode.
3265 This macro is expanded at compile time to a form tailored for the mode
3266 in question, so MODE must be a constant. Therefore MODE is not
3267 evaluated and should not be quoted."
3270 \f
3273 ;;; cc-langs.el ends here