xref: /vim-8.2.3635/runtime/syntax/c.vim (revision 2b8388bd)
1" Vim syntax file
2" Language:	C
3" Maintainer:	Bram Moolenaar <[email protected]>
4" Last Change:	2015 Feb 27
5
6" Quit when a (custom) syntax file was already loaded
7if exists("b:current_syntax")
8  finish
9endif
10
11let s:cpo_save = &cpo
12set cpo&vim
13
14let s:ft = matchstr(&ft, '^\([^.]\)\+')
15
16" A bunch of useful C keywords
17syn keyword	cStatement	goto break return continue asm
18syn keyword	cLabel		case default
19syn keyword	cConditional	if else switch
20syn keyword	cRepeat		while for do
21
22syn keyword	cTodo		contained TODO FIXME XXX
23
24" It's easy to accidentally add a space after a backslash that was intended
25" for line continuation.  Some compilers allow it, which makes it
26" unpredictable and should be avoided.
27syn match	cBadContinuation contained "\\\s\+$"
28
29" cCommentGroup allows adding matches for special things in comments
30syn cluster	cCommentGroup	contains=cTodo,cBadContinuation
31
32" String and Character constants
33" Highlight special characters (those which have a backslash) differently
34syn match	cSpecial	display contained "\\\(x\x\+\|\o\{1,3}\|.\|$\)"
35if !exists("c_no_utf")
36  syn match	cSpecial	display contained "\\\(u\x\{4}\|U\x\{8}\)"
37endif
38
39if !exists("c_no_cformat")
40  " Highlight % items in strings.
41  if !exists("c_no_c99") " ISO C99
42    syn match	cFormat		display "%\(\d\+\$\)\=[-+' #0*]*\(\d*\|\*\|\*\d\+\$\)\(\.\(\d*\|\*\|\*\d\+\$\)\)\=\([hlLjzt]\|ll\|hh\)\=\([aAbdiuoxXDOUfFeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
43  else
44    syn match	cFormat		display "%\(\d\+\$\)\=[-+' #0*]*\(\d*\|\*\|\*\d\+\$\)\(\.\(\d*\|\*\|\*\d\+\$\)\)\=\([hlL]\|ll\)\=\([bdiuoxXDOUfeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
45  endif
46  syn match	cFormat		display "%%" contained
47endif
48
49" cCppString: same as cString, but ends at end of line
50if s:ft ==# "cpp" && !exists("cpp_no_cpp11")
51  " ISO C++11
52  syn region	cString		start=+\(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
53  syn region 	cCppString	start=+\(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
54elseif s:ft ==# "c" && !exists("c_no_c11")
55  " ISO C99
56  syn region	cString		start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
57  syn region	cCppString	start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
58else
59  " older C or C++
60  syn region	cString		start=+L\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
61  syn region	cCppString	start=+L\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
62endif
63
64syn region	cCppSkip	contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cSpaceError,cCppSkip
65
66syn cluster	cStringGroup	contains=cCppString,cCppSkip
67
68syn match	cCharacter	"L\='[^\\]'"
69syn match	cCharacter	"L'[^']*'" contains=cSpecial
70if exists("c_gnu")
71  syn match	cSpecialError	"L\='\\[^'\"?\\abefnrtv]'"
72  syn match	cSpecialCharacter "L\='\\['\"?\\abefnrtv]'"
73else
74  syn match	cSpecialError	"L\='\\[^'\"?\\abfnrtv]'"
75  syn match	cSpecialCharacter "L\='\\['\"?\\abfnrtv]'"
76endif
77syn match	cSpecialCharacter display "L\='\\\o\{1,3}'"
78syn match	cSpecialCharacter display "'\\x\x\{1,2}'"
79syn match	cSpecialCharacter display "L'\\x\x\+'"
80
81if (s:ft ==# "c" && !exists("c_no_c11")) || (s:ft ==# "cpp" && !exists("cpp_no_cpp11"))
82  " ISO C11 or ISO C++ 11
83  syn region	cString		start=+\%(U\|u8\=\)"+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
84  syn match	cCharacter	"[Uu]'[^\\]'"
85  syn match	cCharacter	"[Uu]'[^']*'" contains=cSpecial
86  if exists("c_gnu")
87    syn match	cSpecialError	"[Uu]'\\[^'\"?\\abefnrtv]'"
88    syn match	cSpecialCharacter "[Uu]'\\['\"?\\abefnrtv]'"
89  else
90    syn match	cSpecialError	"[Uu]'\\[^'\"?\\abfnrtv]'"
91    syn match	cSpecialCharacter "[Uu]'\\['\"?\\abfnrtv]'"
92  endif
93  syn match	cSpecialCharacter display "[Uu]'\\\o\{1,3}'"
94  syn match	cSpecialCharacter display "[Uu]'\\x\x\+'"
95endif
96
97"when wanted, highlight trailing white space
98if exists("c_space_errors")
99  if !exists("c_no_trail_space_error")
100    syn match	cSpaceError	display excludenl "\s\+$"
101  endif
102  if !exists("c_no_tab_space_error")
103    syn match	cSpaceError	display " \+\t"me=e-1
104  endif
105endif
106
107" This should be before cErrInParen to avoid problems with #define ({ xxx })
108if exists("c_curly_error")
109  syn match cCurlyError "}"
110  syn region	cBlock		start="{" end="}" contains=ALLBUT,cBadBlock,cCurlyError,@cParenGroup,cErrInParen,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell fold
111else
112  syn region	cBlock		start="{" end="}" transparent fold
113endif
114
115" Catch errors caused by wrong parenthesis and brackets.
116" Also accept <% for {, %> for }, <: for [ and :> for ] (C99)
117" But avoid matching <::.
118syn cluster	cParenGroup	contains=cParenError,cIncluded,cSpecial,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cUserLabel,cBitField,cOctalZero,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom
119if exists("c_no_curly_error")
120  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
121    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
122    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
123    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
124    syn match	cParenError	display ")"
125    syn match	cErrInParen	display contained "^^<%\|^%>"
126  else
127    syn region	cParen		transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
128    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
129    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
130    syn match	cParenError	display ")"
131    syn match	cErrInParen	display contained "^[{}]\|^<%\|^%>"
132  endif
133elseif exists("c_no_bracket_error")
134  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
135    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
136    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
137    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
138    syn match	cParenError	display ")"
139    syn match	cErrInParen	display contained "<%\|%>"
140  else
141    syn region	cParen		transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
142    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
143    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
144    syn match	cParenError	display ")"
145    syn match	cErrInParen	display contained "[{}]\|<%\|%>"
146  endif
147else
148  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
149    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
150    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
151    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
152    syn match	cParenError	display "[\])]"
153    syn match	cErrInParen	display contained "<%\|%>"
154    syn region	cBracket	transparent start='\[\|<::\@!' end=']\|:>' contains=ALLBUT,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
155  else
156    syn region	cParen		transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
157    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
158    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
159    syn match	cParenError	display "[\])]"
160    syn match	cErrInParen	display contained "[\]{}]\|<%\|%>"
161    syn region	cBracket	transparent start='\[\|<::\@!' end=']\|:>' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
162  endif
163  " cCppBracket: same as cParen but ends at end-of-line; used in cDefine
164  syn region	cCppBracket	transparent start='\[\|<::\@!' skip='\\$' excludenl end=']\|:>' end='$' contained contains=ALLBUT,@cParenGroup,cErrInParen,cParen,cBracket,cString,@Spell
165  syn match	cErrInBracket	display contained "[);{}]\|<%\|%>"
166endif
167
168if s:ft ==# 'c' || exists("cpp_no_cpp11")
169  syn region	cBadBlock	keepend start="{" end="}" contained containedin=cParen,cBracket,cBadBlock transparent fold
170endif
171
172"integer number, or floating point number without a dot and with "f".
173syn case ignore
174syn match	cNumbers	display transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctalError,cOctal
175" Same, but without octal error (for comments)
176syn match	cNumbersCom	display contained transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctal
177syn match	cNumber		display contained "\d\+\(u\=l\{0,2}\|ll\=u\)\>"
178"hex number
179syn match	cNumber		display contained "0x\x\+\(u\=l\{0,2}\|ll\=u\)\>"
180" Flag the first zero of an octal number as something special
181syn match	cOctal		display contained "0\o\+\(u\=l\{0,2}\|ll\=u\)\>" contains=cOctalZero
182syn match	cOctalZero	display contained "\<0"
183syn match	cFloat		display contained "\d\+f"
184"floating point number, with dot, optional exponent
185syn match	cFloat		display contained "\d\+\.\d*\(e[-+]\=\d\+\)\=[fl]\="
186"floating point number, starting with a dot, optional exponent
187syn match	cFloat		display contained "\.\d\+\(e[-+]\=\d\+\)\=[fl]\=\>"
188"floating point number, without dot, with exponent
189syn match	cFloat		display contained "\d\+e[-+]\=\d\+[fl]\=\>"
190if !exists("c_no_c99")
191  "hexadecimal floating point number, optional leading digits, with dot, with exponent
192  syn match	cFloat		display contained "0x\x*\.\x\+p[-+]\=\d\+[fl]\=\>"
193  "hexadecimal floating point number, with leading digits, optional dot, with exponent
194  syn match	cFloat		display contained "0x\x\+\.\=p[-+]\=\d\+[fl]\=\>"
195endif
196
197" flag an octal number with wrong digits
198syn match	cOctalError	display contained "0\o*[89]\d*"
199syn case match
200
201if exists("c_comment_strings")
202  " A comment can contain cString, cCharacter and cNumber.
203  " But a "*/" inside a cString in a cComment DOES end the comment!  So we
204  " need to use a special type of cString: cCommentString, which also ends on
205  " "*/", and sees a "*" at the start of the line as comment again.
206  " Unfortunately this doesn't very well work for // type of comments :-(
207  syn match	cCommentSkip	contained "^\s*\*\($\|\s\+\)"
208  syn region cCommentString	contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end=+\*/+me=s-1 contains=cSpecial,cCommentSkip
209  syn region cComment2String	contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end="$" contains=cSpecial
210  syn region  cCommentL	start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cComment2String,cCharacter,cNumbersCom,cSpaceError,@Spell
211  if exists("c_no_comment_fold")
212    " Use "extend" here to have preprocessor lines not terminate halfway a
213    " comment.
214    syn region cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell extend
215  else
216    syn region cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell fold extend
217  endif
218else
219  syn region	cCommentL	start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cSpaceError,@Spell
220  if exists("c_no_comment_fold")
221    syn region	cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cSpaceError,@Spell extend
222  else
223    syn region	cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cSpaceError,@Spell fold extend
224  endif
225endif
226" keep a // comment separately, it terminates a preproc. conditional
227syn match	cCommentError	display "\*/"
228syn match	cCommentStartError display "/\*"me=e-1 contained
229
230syn keyword	cOperator	sizeof
231if exists("c_gnu")
232  syn keyword	cStatement	__asm__
233  syn keyword	cOperator	typeof __real__ __imag__
234endif
235syn keyword	cType		int long short char void
236syn keyword	cType		signed unsigned float double
237if !exists("c_no_ansi") || exists("c_ansi_typedefs")
238  syn keyword   cType		size_t ssize_t off_t wchar_t ptrdiff_t sig_atomic_t fpos_t
239  syn keyword   cType		clock_t time_t va_list jmp_buf FILE DIR div_t ldiv_t
240  syn keyword   cType		mbstate_t wctrans_t wint_t wctype_t
241endif
242if !exists("c_no_c99") " ISO C99
243  syn keyword	cType		_Bool bool _Complex complex _Imaginary imaginary
244  syn keyword	cType		int8_t int16_t int32_t int64_t
245  syn keyword	cType		uint8_t uint16_t uint32_t uint64_t
246  syn keyword	cType		int_least8_t int_least16_t int_least32_t int_least64_t
247  syn keyword	cType		uint_least8_t uint_least16_t uint_least32_t uint_least64_t
248  syn keyword	cType		int_fast8_t int_fast16_t int_fast32_t int_fast64_t
249  syn keyword	cType		uint_fast8_t uint_fast16_t uint_fast32_t uint_fast64_t
250  syn keyword	cType		intptr_t uintptr_t
251  syn keyword	cType		intmax_t uintmax_t
252endif
253if exists("c_gnu")
254  syn keyword	cType		__label__ __complex__ __volatile__
255endif
256
257syn keyword	cStructure	struct union enum typedef
258syn keyword	cStorageClass	static register auto volatile extern const
259if exists("c_gnu")
260  syn keyword	cStorageClass	inline __attribute__
261endif
262if !exists("c_no_c99")
263  syn keyword	cStorageClass	inline restrict
264endif
265if !exists("c_no_c11")
266  syn keyword	cStorageClass	_Alignas alignas
267  syn keyword	cOperator	_Alignof alignof
268  syn keyword	cStorageClass	_Atomic
269  syn keyword	cOperator	_Generic
270  syn keyword	cStorageClass	_Noreturn noreturn
271  syn keyword	cOperator	_Static_assert static_assert
272  syn keyword	cStorageClass	_Thread_local thread_local
273  syn keyword   cType		char16_t char32_t
274endif
275
276if !exists("c_no_ansi") || exists("c_ansi_constants") || exists("c_gnu")
277  if exists("c_gnu")
278    syn keyword cConstant __GNUC__ __FUNCTION__ __PRETTY_FUNCTION__ __func__
279  endif
280  syn keyword cConstant __LINE__ __FILE__ __DATE__ __TIME__ __STDC__
281  syn keyword cConstant __STDC_VERSION__
282  syn keyword cConstant CHAR_BIT MB_LEN_MAX MB_CUR_MAX
283  syn keyword cConstant UCHAR_MAX UINT_MAX ULONG_MAX USHRT_MAX
284  syn keyword cConstant CHAR_MIN INT_MIN LONG_MIN SHRT_MIN
285  syn keyword cConstant CHAR_MAX INT_MAX LONG_MAX SHRT_MAX
286  syn keyword cConstant SCHAR_MIN SINT_MIN SLONG_MIN SSHRT_MIN
287  syn keyword cConstant SCHAR_MAX SINT_MAX SLONG_MAX SSHRT_MAX
288  if !exists("c_no_c99")
289    syn keyword cConstant __func__
290    syn keyword cConstant LLONG_MIN LLONG_MAX ULLONG_MAX
291    syn keyword cConstant INT8_MIN INT16_MIN INT32_MIN INT64_MIN
292    syn keyword cConstant INT8_MAX INT16_MAX INT32_MAX INT64_MAX
293    syn keyword cConstant UINT8_MAX UINT16_MAX UINT32_MAX UINT64_MAX
294    syn keyword cConstant INT_LEAST8_MIN INT_LEAST16_MIN INT_LEAST32_MIN INT_LEAST64_MIN
295    syn keyword cConstant INT_LEAST8_MAX INT_LEAST16_MAX INT_LEAST32_MAX INT_LEAST64_MAX
296    syn keyword cConstant UINT_LEAST8_MAX UINT_LEAST16_MAX UINT_LEAST32_MAX UINT_LEAST64_MAX
297    syn keyword cConstant INT_FAST8_MIN INT_FAST16_MIN INT_FAST32_MIN INT_FAST64_MIN
298    syn keyword cConstant INT_FAST8_MAX INT_FAST16_MAX INT_FAST32_MAX INT_FAST64_MAX
299    syn keyword cConstant UINT_FAST8_MAX UINT_FAST16_MAX UINT_FAST32_MAX UINT_FAST64_MAX
300    syn keyword cConstant INTPTR_MIN INTPTR_MAX UINTPTR_MAX
301    syn keyword cConstant INTMAX_MIN INTMAX_MAX UINTMAX_MAX
302    syn keyword cConstant PTRDIFF_MIN PTRDIFF_MAX SIG_ATOMIC_MIN SIG_ATOMIC_MAX
303    syn keyword cConstant SIZE_MAX WCHAR_MIN WCHAR_MAX WINT_MIN WINT_MAX
304  endif
305  syn keyword cConstant FLT_RADIX FLT_ROUNDS
306  syn keyword cConstant FLT_DIG FLT_MANT_DIG FLT_EPSILON
307  syn keyword cConstant DBL_DIG DBL_MANT_DIG DBL_EPSILON
308  syn keyword cConstant LDBL_DIG LDBL_MANT_DIG LDBL_EPSILON
309  syn keyword cConstant FLT_MIN FLT_MAX FLT_MIN_EXP FLT_MAX_EXP
310  syn keyword cConstant FLT_MIN_10_EXP FLT_MAX_10_EXP
311  syn keyword cConstant DBL_MIN DBL_MAX DBL_MIN_EXP DBL_MAX_EXP
312  syn keyword cConstant DBL_MIN_10_EXP DBL_MAX_10_EXP
313  syn keyword cConstant LDBL_MIN LDBL_MAX LDBL_MIN_EXP LDBL_MAX_EXP
314  syn keyword cConstant LDBL_MIN_10_EXP LDBL_MAX_10_EXP
315  syn keyword cConstant HUGE_VAL CLOCKS_PER_SEC NULL
316  syn keyword cConstant LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY
317  syn keyword cConstant LC_NUMERIC LC_TIME
318  syn keyword cConstant SIG_DFL SIG_ERR SIG_IGN
319  syn keyword cConstant SIGABRT SIGFPE SIGILL SIGHUP SIGINT SIGSEGV SIGTERM
320  " Add POSIX signals as well...
321  syn keyword cConstant SIGABRT SIGALRM SIGCHLD SIGCONT SIGFPE SIGHUP
322  syn keyword cConstant SIGILL SIGINT SIGKILL SIGPIPE SIGQUIT SIGSEGV
323  syn keyword cConstant SIGSTOP SIGTERM SIGTRAP SIGTSTP SIGTTIN SIGTTOU
324  syn keyword cConstant SIGUSR1 SIGUSR2
325  syn keyword cConstant _IOFBF _IOLBF _IONBF BUFSIZ EOF WEOF
326  syn keyword cConstant FOPEN_MAX FILENAME_MAX L_tmpnam
327  syn keyword cConstant SEEK_CUR SEEK_END SEEK_SET
328  syn keyword cConstant TMP_MAX stderr stdin stdout
329  syn keyword cConstant EXIT_FAILURE EXIT_SUCCESS RAND_MAX
330  " POSIX 2001
331  syn keyword cConstant SIGBUS SIGPOLL SIGPROF SIGSYS SIGURG
332  syn keyword cConstant SIGVTALRM SIGXCPU SIGXFSZ
333  " non-POSIX signals
334  syn keyword cConstant SIGWINCH SIGINFO
335  " Add POSIX errors as well
336  syn keyword cConstant E2BIG EACCES EAGAIN EBADF EBADMSG EBUSY
337  syn keyword cConstant ECANCELED ECHILD EDEADLK EDOM EEXIST EFAULT
338  syn keyword cConstant EFBIG EILSEQ EINPROGRESS EINTR EINVAL EIO EISDIR
339  syn keyword cConstant EMFILE EMLINK EMSGSIZE ENAMETOOLONG ENFILE ENODEV
340  syn keyword cConstant ENOENT ENOEXEC ENOLCK ENOMEM ENOSPC ENOSYS
341  syn keyword cConstant ENOTDIR ENOTEMPTY ENOTSUP ENOTTY ENXIO EPERM
342  syn keyword cConstant EPIPE ERANGE EROFS ESPIPE ESRCH ETIMEDOUT EXDEV
343  " math.h
344  syn keyword cConstant M_E M_LOG2E M_LOG10E M_LN2 M_LN10 M_PI M_PI_2 M_PI_4
345  syn keyword cConstant M_1_PI M_2_PI M_2_SQRTPI M_SQRT2 M_SQRT1_2
346endif
347if !exists("c_no_c99") " ISO C99
348  syn keyword cConstant true false
349endif
350
351" Accept %: for # (C99)
352syn region	cPreCondit	start="^\s*\(%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" keepend contains=cComment,cCommentL,cCppString,cCharacter,cCppParen,cParenError,cNumbers,cCommentError,cSpaceError
353syn match	cPreConditMatch	display "^\s*\(%:\|#\)\s*\(else\|endif\)\>"
354if !exists("c_no_if0")
355  syn cluster	cCppOutInGroup	contains=cCppInIf,cCppInElse,cCppInElse2,cCppOutIf,cCppOutIf2,cCppOutElse,cCppInSkip,cCppOutSkip
356  syn region	cCppOutWrapper	start="^\s*\(%:\|#\)\s*if\s\+0\+\s*\($\|//\|/\*\|&\)" end=".\@=\|$" contains=cCppOutIf,cCppOutElse,@NoSpell fold
357  syn region	cCppOutIf	contained start="0\+" matchgroup=cCppOutWrapper end="^\s*\(%:\|#\)\s*endif\>" contains=cCppOutIf2,cCppOutElse
358  if !exists("c_no_if0_fold")
359    syn region	cCppOutIf2	contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip,@Spell fold
360  else
361    syn region	cCppOutIf2	contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip,@Spell
362  endif
363  syn region	cCppOutElse	contained matchgroup=cCppOutWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=TOP,cPreCondit
364  syn region	cCppInWrapper	start="^\s*\(%:\|#\)\s*if\s\+0*[1-9]\d*\s*\($\|//\|/\*\||\)" end=".\@=\|$" contains=cCppInIf,cCppInElse fold
365  syn region	cCppInIf	contained matchgroup=cCppInWrapper start="\d\+" end="^\s*\(%:\|#\)\s*endif\>" contains=TOP,cPreCondit
366  if !exists("c_no_if0_fold")
367    syn region	cCppInElse	contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2 fold
368  else
369    syn region	cCppInElse	contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2
370  endif
371  syn region	cCppInElse2	contained matchgroup=cCppInWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)\([^/]\|/[^/*]\)*" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=cSpaceError,cCppOutSkip,@Spell
372  syn region	cCppOutSkip	contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cSpaceError,cCppOutSkip
373  syn region	cCppInSkip	contained matchgroup=cCppInWrapper start="^\s*\(%:\|#\)\s*\(if\s\+\(\d\+\s*\($\|//\|/\*\||\|&\)\)\@!\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" containedin=cCppOutElse,cCppInIf,cCppInSkip contains=TOP,cPreProc
374endif
375syn region	cIncluded	display contained start=+"+ skip=+\\\\\|\\"+ end=+"+
376syn match	cIncluded	display contained "<[^>]*>"
377syn match	cInclude	display "^\s*\(%:\|#\)\s*include\>\s*["<]" contains=cIncluded
378"syn match cLineSkip	"\\$"
379syn cluster	cPreProcGroup	contains=cPreCondit,cIncluded,cInclude,cDefine,cErrInParen,cErrInBracket,cUserLabel,cSpecial,cOctalZero,cCppOutWrapper,cCppInWrapper,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom,cString,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cParen,cBracket,cMulti,cBadBlock
380syn region	cDefine		start="^\s*\(%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
381syn region	cPreProc	start="^\s*\(%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
382
383" Highlight User Labels
384syn cluster	cMultiGroup	contains=cIncluded,cSpecial,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cUserCont,cUserLabel,cBitField,cOctalZero,cCppOutWrapper,cCppInWrapper,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom,cCppParen,cCppBracket,cCppString
385if s:ft ==# 'c' || exists("cpp_no_cpp11")
386  syn region	cMulti		transparent start='?' skip='::' end=':' contains=ALLBUT,@cMultiGroup,@Spell,@cStringGroup
387endif
388" Avoid matching foo::bar() in C++ by requiring that the next char is not ':'
389syn cluster	cLabelGroup	contains=cUserLabel
390syn match	cUserCont	display "^\s*\I\i*\s*:$" contains=@cLabelGroup
391syn match	cUserCont	display ";\s*\I\i*\s*:$" contains=@cLabelGroup
392syn match	cUserCont	display "^\s*\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
393syn match	cUserCont	display ";\s*\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
394
395syn match	cUserLabel	display "\I\i*" contained
396
397" Avoid recognizing most bitfields as labels
398syn match	cBitField	display "^\s*\I\i*\s*:\s*[1-9]"me=e-1 contains=cType
399syn match	cBitField	display ";\s*\I\i*\s*:\s*[1-9]"me=e-1 contains=cType
400
401if exists("c_minlines")
402  let b:c_minlines = c_minlines
403else
404  if !exists("c_no_if0")
405    let b:c_minlines = 50	" #if 0 constructs can be long
406  else
407    let b:c_minlines = 15	" mostly for () constructs
408  endif
409endif
410if exists("c_curly_error")
411  syn sync fromstart
412else
413  exec "syn sync ccomment cComment minlines=" . b:c_minlines
414endif
415
416" Define the default highlighting.
417" Only used when an item doesn't have highlighting yet
418hi def link cFormat		cSpecial
419hi def link cCppString		cString
420hi def link cCommentL		cComment
421hi def link cCommentStart	cComment
422hi def link cLabel		Label
423hi def link cUserLabel		Label
424hi def link cConditional	Conditional
425hi def link cRepeat		Repeat
426hi def link cCharacter		Character
427hi def link cSpecialCharacter	cSpecial
428hi def link cNumber		Number
429hi def link cOctal		Number
430hi def link cOctalZero		PreProc	 " link this to Error if you want
431hi def link cFloat		Float
432hi def link cOctalError		cError
433hi def link cParenError		cError
434hi def link cErrInParen		cError
435hi def link cErrInBracket	cError
436hi def link cCommentError	cError
437hi def link cCommentStartError	cError
438hi def link cSpaceError		cError
439hi def link cSpecialError	cError
440hi def link cCurlyError		cError
441hi def link cOperator		Operator
442hi def link cStructure		Structure
443hi def link cStorageClass	StorageClass
444hi def link cInclude		Include
445hi def link cPreProc		PreProc
446hi def link cDefine		Macro
447hi def link cIncluded		cString
448hi def link cError		Error
449hi def link cStatement		Statement
450hi def link cCppInWrapper	cCppOutWrapper
451hi def link cCppOutWrapper	cPreCondit
452hi def link cPreConditMatch	cPreCondit
453hi def link cPreCondit		PreCondit
454hi def link cType		Type
455hi def link cConstant		Constant
456hi def link cCommentString	cString
457hi def link cComment2String	cString
458hi def link cCommentSkip	cComment
459hi def link cString		String
460hi def link cComment		Comment
461hi def link cSpecial		SpecialChar
462hi def link cTodo		Todo
463hi def link cBadContinuation	Error
464hi def link cCppOutSkip		cCppOutIf2
465hi def link cCppInElse2		cCppOutIf2
466hi def link cCppOutIf2		cCppOut
467hi def link cCppOut		Comment
468
469let b:current_syntax = "c"
470
471unlet s:ft
472
473let &cpo = s:cpo_save
474unlet s:cpo_save
475" vim: ts=8
476