xref: /vim-8.2.3635/runtime/syntax/c.vim (revision 5f1920ad)
1" Vim syntax file
2" Language:	C
3" Maintainer:	Bram Moolenaar <[email protected]>
4" Last Change:	2019 Nov 29
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" Optional embedded Autodoc parsing
17" To enable it add: let g:c_autodoc = 1
18" to your .vimrc
19if exists("c_autodoc")
20  syn include @cAutodoc <sfile>:p:h/autodoc.vim
21  unlet b:current_syntax
22endif
23
24" A bunch of useful C keywords
25syn keyword	cStatement	goto break return continue asm
26syn keyword	cLabel		case default
27syn keyword	cConditional	if else switch
28syn keyword	cRepeat		while for do
29
30syn keyword	cTodo		contained TODO FIXME XXX
31
32" It's easy to accidentally add a space after a backslash that was intended
33" for line continuation.  Some compilers allow it, which makes it
34" unpredictable and should be avoided.
35syn match	cBadContinuation contained "\\\s\+$"
36
37" cCommentGroup allows adding matches for special things in comments
38syn cluster	cCommentGroup	contains=cTodo,cBadContinuation
39
40" String and Character constants
41" Highlight special characters (those which have a backslash) differently
42syn match	cSpecial	display contained "\\\(x\x\+\|\o\{1,3}\|.\|$\)"
43if !exists("c_no_utf")
44  syn match	cSpecial	display contained "\\\(u\x\{4}\|U\x\{8}\)"
45endif
46
47if !exists("c_no_cformat")
48  " Highlight % items in strings.
49  if !exists("c_no_c99") " ISO C99
50    syn match	cFormat		display "%\(\d\+\$\)\=[-+' #0*]*\(\d*\|\*\|\*\d\+\$\)\(\.\(\d*\|\*\|\*\d\+\$\)\)\=\([hlLjzt]\|ll\|hh\)\=\([aAbdiuoxXDOUfFeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
51  else
52    syn match	cFormat		display "%\(\d\+\$\)\=[-+' #0*]*\(\d*\|\*\|\*\d\+\$\)\(\.\(\d*\|\*\|\*\d\+\$\)\)\=\([hlL]\|ll\)\=\([bdiuoxXDOUfeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
53  endif
54  syn match	cFormat		display "%%" contained
55endif
56
57" cCppString: same as cString, but ends at end of line
58if s:ft ==# "cpp" && !exists("cpp_no_cpp11") && !exists("c_no_cformat")
59  " ISO C++11
60  syn region	cString		start=+\(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
61  syn region 	cCppString	start=+\(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
62elseif s:ft ==# "c" && !exists("c_no_c11") && !exists("c_no_cformat")
63  " ISO C99
64  syn region	cString		start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
65  syn region	cCppString	start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
66else
67  " older C or C++
68  syn match	cFormat		display "%%" contained
69  syn region	cString		start=+L\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
70  syn region	cCppString	start=+L\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
71endif
72
73syn region	cCppSkip	contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cSpaceError,cCppSkip
74
75syn cluster	cStringGroup	contains=cCppString,cCppSkip
76
77syn match	cCharacter	"L\='[^\\]'"
78syn match	cCharacter	"L'[^']*'" contains=cSpecial
79if exists("c_gnu")
80  syn match	cSpecialError	"L\='\\[^'\"?\\abefnrtv]'"
81  syn match	cSpecialCharacter "L\='\\['\"?\\abefnrtv]'"
82else
83  syn match	cSpecialError	"L\='\\[^'\"?\\abfnrtv]'"
84  syn match	cSpecialCharacter "L\='\\['\"?\\abfnrtv]'"
85endif
86syn match	cSpecialCharacter display "L\='\\\o\{1,3}'"
87syn match	cSpecialCharacter display "'\\x\x\{1,2}'"
88syn match	cSpecialCharacter display "L'\\x\x\+'"
89
90if (s:ft ==# "c" && !exists("c_no_c11")) || (s:ft ==# "cpp" && !exists("cpp_no_cpp11"))
91  " ISO C11 or ISO C++ 11
92  if exists("c_no_cformat")
93    syn region	cString		start=+\%(U\|u8\=\)"+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,@Spell extend
94  else
95    syn region	cString		start=+\%(U\|u8\=\)"+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
96  endif
97  syn match	cCharacter	"[Uu]'[^\\]'"
98  syn match	cCharacter	"[Uu]'[^']*'" contains=cSpecial
99  if exists("c_gnu")
100    syn match	cSpecialError	"[Uu]'\\[^'\"?\\abefnrtv]'"
101    syn match	cSpecialCharacter "[Uu]'\\['\"?\\abefnrtv]'"
102  else
103    syn match	cSpecialError	"[Uu]'\\[^'\"?\\abfnrtv]'"
104    syn match	cSpecialCharacter "[Uu]'\\['\"?\\abfnrtv]'"
105  endif
106  syn match	cSpecialCharacter display "[Uu]'\\\o\{1,3}'"
107  syn match	cSpecialCharacter display "[Uu]'\\x\x\+'"
108endif
109
110"when wanted, highlight trailing white space
111if exists("c_space_errors")
112  if !exists("c_no_trail_space_error")
113    syn match	cSpaceError	display excludenl "\s\+$"
114  endif
115  if !exists("c_no_tab_space_error")
116    syn match	cSpaceError	display " \+\t"me=e-1
117  endif
118endif
119
120" This should be before cErrInParen to avoid problems with #define ({ xxx })
121if exists("c_curly_error")
122  syn match cCurlyError "}"
123  syn region	cBlock		start="{" end="}" contains=ALLBUT,cBadBlock,cCurlyError,@cParenGroup,cErrInParen,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell fold
124else
125  syn region	cBlock		start="{" end="}" transparent fold
126endif
127
128" Catch errors caused by wrong parenthesis and brackets.
129" Also accept <% for {, %> for }, <: for [ and :> for ] (C99)
130" But avoid matching <::.
131syn cluster	cParenGroup	contains=cParenError,cIncluded,cSpecial,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cUserLabel,cBitField,cOctalZero,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom
132if exists("c_no_curly_error")
133  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
134    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
135    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
136    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
137    syn match	cParenError	display ")"
138    syn match	cErrInParen	display contained "^^<%\|^%>"
139  else
140    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
141    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
142    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
143    syn match	cParenError	display ")"
144    syn match	cErrInParen	display contained "^[{}]\|^<%\|^%>"
145  endif
146elseif exists("c_no_bracket_error")
147  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
148    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
149    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
150    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
151    syn match	cParenError	display ")"
152    syn match	cErrInParen	display contained "<%\|%>"
153  else
154    syn region	cParen		transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
155    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
156    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
157    syn match	cParenError	display ")"
158    syn match	cErrInParen	display contained "[{}]\|<%\|%>"
159  endif
160else
161  if s:ft ==# 'cpp' && !exists("cpp_no_cpp11")
162    syn region	cParen		transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
163    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
164    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
165    syn match	cParenError	display "[\])]"
166    syn match	cErrInParen	display contained "<%\|%>"
167    syn region	cBracket	transparent start='\[\|<::\@!' end=']\|:>' contains=ALLBUT,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
168  else
169    syn region	cParen		transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
170    " cCppParen: same as cParen but ends at end-of-line; used in cDefine
171    syn region	cCppParen	transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
172    syn match	cParenError	display "[\])]"
173    syn match	cErrInParen	display contained "[\]{}]\|<%\|%>"
174    syn region	cBracket	transparent start='\[\|<::\@!' end=']\|:>' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
175  endif
176  " cCppBracket: same as cParen but ends at end-of-line; used in cDefine
177  syn region	cCppBracket	transparent start='\[\|<::\@!' skip='\\$' excludenl end=']\|:>' end='$' contained contains=ALLBUT,@cParenGroup,cErrInParen,cParen,cBracket,cString,@Spell
178  syn match	cErrInBracket	display contained "[);{}]\|<%\|%>"
179endif
180
181if s:ft ==# 'c' || exists("cpp_no_cpp11")
182  syn region	cBadBlock	keepend start="{" end="}" contained containedin=cParen,cBracket,cBadBlock transparent fold
183endif
184
185"integer number, or floating point number without a dot and with "f".
186syn case ignore
187syn match	cNumbers	display transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctalError,cOctal
188" Same, but without octal error (for comments)
189syn match	cNumbersCom	display contained transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctal
190syn match	cNumber		display contained "\d\+\(u\=l\{0,2}\|ll\=u\)\>"
191"hex number
192syn match	cNumber		display contained "0x\x\+\(u\=l\{0,2}\|ll\=u\)\>"
193" Flag the first zero of an octal number as something special
194syn match	cOctal		display contained "0\o\+\(u\=l\{0,2}\|ll\=u\)\>" contains=cOctalZero
195syn match	cOctalZero	display contained "\<0"
196syn match	cFloat		display contained "\d\+f"
197"floating point number, with dot, optional exponent
198syn match	cFloat		display contained "\d\+\.\d*\(e[-+]\=\d\+\)\=[fl]\="
199"floating point number, starting with a dot, optional exponent
200syn match	cFloat		display contained "\.\d\+\(e[-+]\=\d\+\)\=[fl]\=\>"
201"floating point number, without dot, with exponent
202syn match	cFloat		display contained "\d\+e[-+]\=\d\+[fl]\=\>"
203if !exists("c_no_c99")
204  "hexadecimal floating point number, optional leading digits, with dot, with exponent
205  syn match	cFloat		display contained "0x\x*\.\x\+p[-+]\=\d\+[fl]\=\>"
206  "hexadecimal floating point number, with leading digits, optional dot, with exponent
207  syn match	cFloat		display contained "0x\x\+\.\=p[-+]\=\d\+[fl]\=\>"
208endif
209
210" flag an octal number with wrong digits
211syn match	cOctalError	display contained "0\o*[89]\d*"
212syn case match
213
214if exists("c_comment_strings")
215  " A comment can contain cString, cCharacter and cNumber.
216  " But a "*/" inside a cString in a cComment DOES end the comment!  So we
217  " need to use a special type of cString: cCommentString, which also ends on
218  " "*/", and sees a "*" at the start of the line as comment again.
219  " Unfortunately this doesn't very well work for // type of comments :-(
220  syn match	cCommentSkip	contained "^\s*\*\($\|\s\+\)"
221  syn region cCommentString	contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end=+\*/+me=s-1 contains=cSpecial,cCommentSkip
222  syn region cComment2String	contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end="$" contains=cSpecial
223  syn region  cCommentL	start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cComment2String,cCharacter,cNumbersCom,cSpaceError,cWrongComTail,@Spell
224  if exists("c_no_comment_fold")
225    " Use "extend" here to have preprocessor lines not terminate halfway a
226    " comment.
227    syn region cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell extend
228  else
229    syn region cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell fold extend
230  endif
231else
232  syn region	cCommentL	start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cSpaceError,@Spell
233  if exists("c_no_comment_fold")
234    syn region	cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cSpaceError,@Spell extend
235  else
236    syn region	cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cSpaceError,@Spell fold extend
237  endif
238endif
239" keep a // comment separately, it terminates a preproc. conditional
240syn match	cCommentError	display "\*/"
241syn match	cCommentStartError display "/\*"me=e-1 contained
242syn match	cWrongComTail	display "\*/"
243
244syn keyword	cOperator	sizeof
245if exists("c_gnu")
246  syn keyword	cStatement	__asm__
247  syn keyword	cOperator	typeof __real__ __imag__
248endif
249syn keyword	cType		int long short char void
250syn keyword	cType		signed unsigned float double
251if !exists("c_no_ansi") || exists("c_ansi_typedefs")
252  syn keyword   cType		size_t ssize_t off_t wchar_t ptrdiff_t sig_atomic_t fpos_t
253  syn keyword   cType		clock_t time_t va_list jmp_buf FILE DIR div_t ldiv_t
254  syn keyword   cType		mbstate_t wctrans_t wint_t wctype_t
255endif
256if !exists("c_no_c99") " ISO C99
257  syn keyword	cType		_Bool bool _Complex complex _Imaginary imaginary
258  syn keyword	cType		int8_t int16_t int32_t int64_t
259  syn keyword	cType		uint8_t uint16_t uint32_t uint64_t
260  if !exists("c_no_bsd")
261    " These are BSD specific.
262    syn keyword	cType		u_int8_t u_int16_t u_int32_t u_int64_t
263  endif
264  syn keyword	cType		int_least8_t int_least16_t int_least32_t int_least64_t
265  syn keyword	cType		uint_least8_t uint_least16_t uint_least32_t uint_least64_t
266  syn keyword	cType		int_fast8_t int_fast16_t int_fast32_t int_fast64_t
267  syn keyword	cType		uint_fast8_t uint_fast16_t uint_fast32_t uint_fast64_t
268  syn keyword	cType		intptr_t uintptr_t
269  syn keyword	cType		intmax_t uintmax_t
270endif
271if exists("c_gnu")
272  syn keyword	cType		__label__ __complex__ __volatile__
273endif
274
275syn keyword	cStructure	struct union enum typedef
276syn keyword	cStorageClass	static register auto volatile extern const
277if exists("c_gnu")
278  syn keyword	cStorageClass	inline __attribute__
279endif
280if !exists("c_no_c99") && s:ft !=# 'cpp'
281  syn keyword	cStorageClass	inline restrict
282endif
283if !exists("c_no_c11")
284  syn keyword	cStorageClass	_Alignas alignas
285  syn keyword	cOperator	_Alignof alignof
286  syn keyword	cStorageClass	_Atomic
287  syn keyword	cOperator	_Generic
288  syn keyword	cStorageClass	_Noreturn noreturn
289  syn keyword	cOperator	_Static_assert static_assert
290  syn keyword	cStorageClass	_Thread_local thread_local
291  syn keyword   cType		char16_t char32_t
292  " C11 atomics (take down the shield wall!)
293  syn keyword	cType		atomic_bool atomic_char atomic_schar atomic_uchar
294  syn keyword	Ctype		atomic_short atomic_ushort atomic_int atomic_uint
295  syn keyword	cType		atomic_long atomic_ulong atomic_llong atomic_ullong
296  syn keyword	cType		atomic_char16_t atomic_char32_t atomic_wchar_t
297  syn keyword	cType		atomic_int_least8_t atomic_uint_least8_t
298  syn keyword	cType		atomic_int_least16_t atomic_uint_least16_t
299  syn keyword	cType		atomic_int_least32_t atomic_uint_least32_t
300  syn keyword	cType		atomic_int_least64_t atomic_uint_least64_t
301  syn keyword	cType		atomic_int_fast8_t atomic_uint_fast8_t
302  syn keyword	cType		atomic_int_fast16_t atomic_uint_fast16_t
303  syn keyword	cType		atomic_int_fast32_t atomic_uint_fast32_t
304  syn keyword	cType		atomic_int_fast64_t atomic_uint_fast64_t
305  syn keyword	cType		atomic_intptr_t atomic_uintptr_t
306  syn keyword	cType		atomic_size_t atomic_ptrdiff_t
307  syn keyword	cType		atomic_intmax_t atomic_uintmax_t
308endif
309
310if !exists("c_no_ansi") || exists("c_ansi_constants") || exists("c_gnu")
311  if exists("c_gnu")
312    syn keyword cConstant __GNUC__ __FUNCTION__ __PRETTY_FUNCTION__ __func__
313  endif
314  syn keyword cConstant __LINE__ __FILE__ __DATE__ __TIME__ __STDC__
315  syn keyword cConstant __STDC_VERSION__
316  syn keyword cConstant CHAR_BIT MB_LEN_MAX MB_CUR_MAX
317  syn keyword cConstant UCHAR_MAX UINT_MAX ULONG_MAX USHRT_MAX
318  syn keyword cConstant CHAR_MIN INT_MIN LONG_MIN SHRT_MIN
319  syn keyword cConstant CHAR_MAX INT_MAX LONG_MAX SHRT_MAX
320  syn keyword cConstant SCHAR_MIN SINT_MIN SLONG_MIN SSHRT_MIN
321  syn keyword cConstant SCHAR_MAX SINT_MAX SLONG_MAX SSHRT_MAX
322  if !exists("c_no_c99")
323    syn keyword cConstant __func__ __VA_ARGS__
324    syn keyword cConstant LLONG_MIN LLONG_MAX ULLONG_MAX
325    syn keyword cConstant INT8_MIN INT16_MIN INT32_MIN INT64_MIN
326    syn keyword cConstant INT8_MAX INT16_MAX INT32_MAX INT64_MAX
327    syn keyword cConstant UINT8_MAX UINT16_MAX UINT32_MAX UINT64_MAX
328    syn keyword cConstant INT_LEAST8_MIN INT_LEAST16_MIN INT_LEAST32_MIN INT_LEAST64_MIN
329    syn keyword cConstant INT_LEAST8_MAX INT_LEAST16_MAX INT_LEAST32_MAX INT_LEAST64_MAX
330    syn keyword cConstant UINT_LEAST8_MAX UINT_LEAST16_MAX UINT_LEAST32_MAX UINT_LEAST64_MAX
331    syn keyword cConstant INT_FAST8_MIN INT_FAST16_MIN INT_FAST32_MIN INT_FAST64_MIN
332    syn keyword cConstant INT_FAST8_MAX INT_FAST16_MAX INT_FAST32_MAX INT_FAST64_MAX
333    syn keyword cConstant UINT_FAST8_MAX UINT_FAST16_MAX UINT_FAST32_MAX UINT_FAST64_MAX
334    syn keyword cConstant INTPTR_MIN INTPTR_MAX UINTPTR_MAX
335    syn keyword cConstant INTMAX_MIN INTMAX_MAX UINTMAX_MAX
336    syn keyword cConstant PTRDIFF_MIN PTRDIFF_MAX SIG_ATOMIC_MIN SIG_ATOMIC_MAX
337    syn keyword cConstant SIZE_MAX WCHAR_MIN WCHAR_MAX WINT_MIN WINT_MAX
338  endif
339  syn keyword cConstant FLT_RADIX FLT_ROUNDS FLT_DIG FLT_MANT_DIG FLT_EPSILON DBL_DIG DBL_MANT_DIG DBL_EPSILON
340  syn keyword cConstant LDBL_DIG LDBL_MANT_DIG LDBL_EPSILON FLT_MIN FLT_MAX FLT_MIN_EXP FLT_MAX_EXP FLT_MIN_10_EXP FLT_MAX_10_EXP
341  syn keyword cConstant DBL_MIN DBL_MAX DBL_MIN_EXP DBL_MAX_EXP DBL_MIN_10_EXP DBL_MAX_10_EXP LDBL_MIN LDBL_MAX LDBL_MIN_EXP LDBL_MAX_EXP
342  syn keyword cConstant LDBL_MIN_10_EXP LDBL_MAX_10_EXP HUGE_VAL CLOCKS_PER_SEC NULL LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY
343  syn keyword cConstant LC_NUMERIC LC_TIME SIG_DFL SIG_ERR SIG_IGN SIGABRT SIGFPE SIGILL SIGHUP SIGINT SIGSEGV SIGTERM
344  " Add POSIX signals as well...
345  syn keyword cConstant SIGABRT SIGALRM SIGCHLD SIGCONT SIGFPE SIGHUP SIGILL SIGINT SIGKILL SIGPIPE SIGQUIT SIGSEGV
346  syn keyword cConstant SIGSTOP SIGTERM SIGTRAP SIGTSTP SIGTTIN SIGTTOU SIGUSR1 SIGUSR2
347  syn keyword cConstant _IOFBF _IOLBF _IONBF BUFSIZ EOF WEOF FOPEN_MAX FILENAME_MAX L_tmpnam
348  syn keyword cConstant SEEK_CUR SEEK_END SEEK_SET TMP_MAX stderr stdin stdout EXIT_FAILURE EXIT_SUCCESS RAND_MAX
349  " POSIX 2001
350  syn keyword cConstant SIGBUS SIGPOLL SIGPROF SIGSYS SIGURG SIGVTALRM SIGXCPU SIGXFSZ
351  " non-POSIX signals
352  syn keyword cConstant SIGWINCH SIGINFO
353  " Add POSIX errors as well.  List comes from:
354  " http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
355  syn keyword cConstant E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT EAGAIN EALREADY EBADF
356  syn keyword cConstant EBADMSG EBUSY ECANCELED ECHILD ECONNABORTED ECONNREFUSED ECONNRESET EDEADLK
357  syn keyword cConstant EDESTADDRREQ EDOM EDQUOT EEXIST EFAULT EFBIG EHOSTUNREACH EIDRM EILSEQ
358  syn keyword cConstant EINPROGRESS EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK EMSGSIZE
359  syn keyword cConstant EMULTIHOP ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH ENFILE ENOBUFS ENODATA
360  syn keyword cConstant ENODEV ENOENT ENOEXEC ENOLCK ENOLINK ENOMEM ENOMSG ENOPROTOOPT ENOSPC ENOSR
361  syn keyword cConstant ENOSTR ENOSYS ENOTBLK ENOTCONN ENOTDIR ENOTEMPTY ENOTRECOVERABLE ENOTSOCK ENOTSUP
362  syn keyword cConstant ENOTTY ENXIO EOPNOTSUPP EOVERFLOW EOWNERDEAD EPERM EPIPE EPROTO
363  syn keyword cConstant EPROTONOSUPPORT EPROTOTYPE ERANGE EROFS ESPIPE ESRCH ESTALE ETIME ETIMEDOUT
364  syn keyword cConstant ETXTBSY EWOULDBLOCK EXDEV
365  " math.h
366  syn keyword cConstant M_E M_LOG2E M_LOG10E M_LN2 M_LN10 M_PI M_PI_2 M_PI_4
367  syn keyword cConstant M_1_PI M_2_PI M_2_SQRTPI M_SQRT2 M_SQRT1_2
368endif
369if !exists("c_no_c99") " ISO C99
370  syn keyword cConstant true false
371endif
372
373" Accept %: for # (C99)
374syn region	cPreCondit	start="^\s*\zs\(%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" keepend contains=cComment,cCommentL,cCppString,cCharacter,cCppParen,cParenError,cNumbers,cCommentError,cSpaceError
375syn match	cPreConditMatch	display "^\s*\zs\(%:\|#\)\s*\(else\|endif\)\>"
376if !exists("c_no_if0")
377  syn cluster	cCppOutInGroup	contains=cCppInIf,cCppInElse,cCppInElse2,cCppOutIf,cCppOutIf2,cCppOutElse,cCppInSkip,cCppOutSkip
378  syn region	cCppOutWrapper	start="^\s*\zs\(%:\|#\)\s*if\s\+0\+\s*\($\|//\|/\*\|&\)" end=".\@=\|$" contains=cCppOutIf,cCppOutElse,@NoSpell fold
379  syn region	cCppOutIf	contained start="0\+" matchgroup=cCppOutWrapper end="^\s*\(%:\|#\)\s*endif\>" contains=cCppOutIf2,cCppOutElse
380  if !exists("c_no_if0_fold")
381    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
382  else
383    syn region	cCppOutIf2	contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip,@Spell
384  endif
385  syn region	cCppOutElse	contained matchgroup=cCppOutWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=TOP,cPreCondit
386  syn region	cCppInWrapper	start="^\s*\zs\(%:\|#\)\s*if\s\+0*[1-9]\d*\s*\($\|//\|/\*\||\)" end=".\@=\|$" contains=cCppInIf,cCppInElse fold
387  syn region	cCppInIf	contained matchgroup=cCppInWrapper start="\d\+" end="^\s*\(%:\|#\)\s*endif\>" contains=TOP,cPreCondit
388  if !exists("c_no_if0_fold")
389    syn region	cCppInElse	contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2 fold
390  else
391    syn region	cCppInElse	contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2
392  endif
393  syn region	cCppInElse2	contained matchgroup=cCppInWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)\([^/]\|/[^/*]\)*" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=cSpaceError,cCppOutSkip,@Spell
394  syn region	cCppOutSkip	contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cSpaceError,cCppOutSkip
395  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
396endif
397syn region	cIncluded	display contained start=+"+ skip=+\\\\\|\\"+ end=+"+
398syn match	cIncluded	display contained "<[^>]*>"
399syn match	cInclude	display "^\s*\zs\(%:\|#\)\s*include\>\s*["<]" contains=cIncluded
400"syn match cLineSkip	"\\$"
401syn 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
402syn region	cDefine		start="^\s*\zs\(%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
403syn region	cPreProc	start="^\s*\zs\(%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
404
405" Optional embedded Autodoc parsing
406if exists("c_autodoc")
407  syn match cAutodocReal display contained "\%(//\|[/ \t\v]\*\|^\*\)\@2<=!.*" contains=@cAutodoc containedin=cComment,cCommentL
408  syn cluster cCommentGroup add=cAutodocReal
409  syn cluster cPreProcGroup add=cAutodocReal
410endif
411
412" Highlight User Labels
413syn 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
414if s:ft ==# 'c' || exists("cpp_no_cpp11")
415  syn region	cMulti		transparent start='?' skip='::' end=':' contains=ALLBUT,@cMultiGroup,@Spell,@cStringGroup
416endif
417" Avoid matching foo::bar() in C++ by requiring that the next char is not ':'
418syn cluster	cLabelGroup	contains=cUserLabel
419syn match	cUserCont	display "^\s*\zs\I\i*\s*:$" contains=@cLabelGroup
420syn match	cUserCont	display ";\s*\zs\I\i*\s*:$" contains=@cLabelGroup
421if s:ft ==# 'cpp'
422  syn match	cUserCont	display "^\s*\zs\%(class\|struct\|enum\)\@!\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
423  syn match	cUserCont	display ";\s*\zs\%(class\|struct\|enum\)\@!\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
424else
425  syn match	cUserCont	display "^\s*\zs\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
426  syn match	cUserCont	display ";\s*\zs\I\i*\s*:[^:]"me=e-1 contains=@cLabelGroup
427endif
428
429syn match	cUserLabel	display "\I\i*" contained
430
431" Avoid recognizing most bitfields as labels
432syn match	cBitField	display "^\s*\zs\I\i*\s*:\s*[1-9]"me=e-1 contains=cType
433syn match	cBitField	display ";\s*\zs\I\i*\s*:\s*[1-9]"me=e-1 contains=cType
434
435if exists("c_minlines")
436  let b:c_minlines = c_minlines
437else
438  if !exists("c_no_if0")
439    let b:c_minlines = 50	" #if 0 constructs can be long
440  else
441    let b:c_minlines = 15	" mostly for () constructs
442  endif
443endif
444if exists("c_curly_error")
445  syn sync fromstart
446else
447  exec "syn sync ccomment cComment minlines=" . b:c_minlines
448endif
449
450" Define the default highlighting.
451" Only used when an item doesn't have highlighting yet
452hi def link cFormat		cSpecial
453hi def link cCppString		cString
454hi def link cCommentL		cComment
455hi def link cCommentStart	cComment
456hi def link cLabel		Label
457hi def link cUserLabel		Label
458hi def link cConditional	Conditional
459hi def link cRepeat		Repeat
460hi def link cCharacter		Character
461hi def link cSpecialCharacter	cSpecial
462hi def link cNumber		Number
463hi def link cOctal		Number
464hi def link cOctalZero		PreProc	 " link this to Error if you want
465hi def link cFloat		Float
466hi def link cOctalError		cError
467hi def link cParenError		cError
468hi def link cErrInParen		cError
469hi def link cErrInBracket	cError
470hi def link cCommentError	cError
471hi def link cCommentStartError	cError
472hi def link cSpaceError		cError
473hi def link cWrongComTail	cError
474hi def link cSpecialError	cError
475hi def link cCurlyError		cError
476hi def link cOperator		Operator
477hi def link cStructure		Structure
478hi def link cStorageClass	StorageClass
479hi def link cInclude		Include
480hi def link cPreProc		PreProc
481hi def link cDefine		Macro
482hi def link cIncluded		cString
483hi def link cError		Error
484hi def link cStatement		Statement
485hi def link cCppInWrapper	cCppOutWrapper
486hi def link cCppOutWrapper	cPreCondit
487hi def link cPreConditMatch	cPreCondit
488hi def link cPreCondit		PreCondit
489hi def link cType		Type
490hi def link cConstant		Constant
491hi def link cCommentString	cString
492hi def link cComment2String	cString
493hi def link cCommentSkip	cComment
494hi def link cString		String
495hi def link cComment		Comment
496hi def link cSpecial		SpecialChar
497hi def link cTodo		Todo
498hi def link cBadContinuation	Error
499hi def link cCppOutSkip		cCppOutIf2
500hi def link cCppInElse2		cCppOutIf2
501hi def link cCppOutIf2		cCppOut
502hi def link cCppOut		Comment
503
504let b:current_syntax = "c"
505
506unlet s:ft
507
508let &cpo = s:cpo_save
509unlet s:cpo_save
510" vim: ts=8
511