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|
" Vim syntax file
" Language: C
" Maintainer: The Vim Project <https://github.com/vim/vim>
" Last Change: 2023 Aug 10
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
finish
endif
let s:cpo_save = &cpo
set cpo&vim
let s:ft = matchstr(&ft, '^\%([^.]\)\+')
" check if this was included from cpp.vim
let s:in_cpp_family = exists("b:filetype_in_cpp_family")
" Optional embedded Autodoc parsing
" To enable it add: let g:c_autodoc = 1
" to your .vimrc
if exists("c_autodoc")
syn include @cAutodoc <sfile>:p:h/autodoc.vim
unlet b:current_syntax
endif
" A bunch of useful C keywords
syn keyword cStatement goto break return continue asm
syn keyword cLabel case default
syn keyword cConditional if else switch
syn keyword cRepeat while for do
syn keyword cTodo contained TODO FIXME XXX
" It's easy to accidentally add a space after a backslash that was intended
" for line continuation. Some compilers allow it, which makes it
" unpredictable and should be avoided.
syn match cBadContinuation contained "\\\s\+$"
" cCommentGroup allows adding matches for special things in comments
syn cluster cCommentGroup contains=cTodo,cBadContinuation
" String and Character constants
" Highlight special characters (those which have a backslash) differently
syn match cSpecial display contained "\\\%(x\x\+\|\o\{1,3}\|.\|$\)"
if !exists("c_no_utf")
syn match cSpecial display contained "\\\%(u\x\{4}\|U\x\{8}\)"
endif
if !exists("c_no_cformat")
" Highlight % items in strings.
if !exists("c_no_c99") " ISO C99
syn match cFormat display "%\%(\d\+\$\)\=[-+' #0*]*\%(\d*\|\*\|\*\d\+\$\)\%(\.\%(\d*\|\*\|\*\d\+\$\)\)\=\%([hlLjzt]\|ll\|hh\)\=\%([aAbdiuoxXDOUfFeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
else
syn match cFormat display "%\%(\d\+\$\)\=[-+' #0*]*\%(\d*\|\*\|\*\d\+\$\)\%(\.\%(\d*\|\*\|\*\d\+\$\)\)\=\%([hlL]\|ll\)\=\%([bdiuoxXDOUfeEgGcCsSpn]\|\[\^\=.[^]]*\]\)" contained
endif
syn match cFormat display "%%" contained
endif
" cCppString: same as cString, but ends at end of line
if s:in_cpp_family && !exists("cpp_no_cpp11") && !exists("c_no_cformat")
" ISO C++11
syn region cString start=+\%(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
syn region cCppString start=+\%(L\|u\|u8\|U\|R\|LR\|u8R\|uR\|UR\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
elseif s:ft ==# "c" && !exists("c_no_c11") && !exists("c_no_cformat")
" ISO C99
syn region cString start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
syn region cCppString start=+\%(L\|U\|u8\)\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
else
" older C or C++
syn match cFormat display "%%" contained
syn region cString start=+L\="+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
syn region cCppString start=+L\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial,cFormat,@Spell
endif
syn region cCppSkip contained start="^\s*\%(%:\|#\)\s*\%(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\%(%:\|#\)\s*endif\>" contains=cSpaceError,cCppSkip
syn cluster cStringGroup contains=cCppString,cCppSkip
syn match cCharacter "L\='[^\\]'"
syn match cCharacter "L'[^']*'" contains=cSpecial
if exists("c_gnu")
syn match cSpecialError "L\='\\[^'\"?\\abefnrtv]'"
syn match cSpecialCharacter "L\='\\['\"?\\abefnrtv]'"
else
syn match cSpecialError "L\='\\[^'\"?\\abfnrtv]'"
syn match cSpecialCharacter "L\='\\['\"?\\abfnrtv]'"
endif
syn match cSpecialCharacter display "L\='\\\o\{1,3}'"
syn match cSpecialCharacter display "'\\x\x\{1,2}'"
syn match cSpecialCharacter display "L'\\x\x\+'"
if (s:ft ==# "c" && !exists("c_no_c11")) || (s:in_cpp_family && !exists("cpp_no_cpp11"))
" ISO C11 or ISO C++ 11
if exists("c_no_cformat")
syn region cString start=+\%(U\|u8\=\)"+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,@Spell extend
else
syn region cString start=+\%(U\|u8\=\)"+ skip=+\\\\\|\\"+ end=+"+ contains=cSpecial,cFormat,@Spell extend
endif
syn match cCharacter "[Uu]'[^\\]'"
syn match cCharacter "[Uu]'[^']*'" contains=cSpecial
if exists("c_gnu")
syn match cSpecialError "[Uu]'\\[^'\"?\\abefnrtv]'"
syn match cSpecialCharacter "[Uu]'\\['\"?\\abefnrtv]'"
else
syn match cSpecialError "[Uu]'\\[^'\"?\\abfnrtv]'"
syn match cSpecialCharacter "[Uu]'\\['\"?\\abfnrtv]'"
endif
syn match cSpecialCharacter display "[Uu]'\\\o\{1,3}'"
syn match cSpecialCharacter display "[Uu]'\\x\x\+'"
endif
"when wanted, highlight trailing white space
if exists("c_space_errors")
if !exists("c_no_trail_space_error")
syn match cSpaceError display excludenl "\s\+$"
endif
if !exists("c_no_tab_space_error")
syn match cSpaceError display " \+\t"me=e-1
endif
endif
" This should be before cErrInParen to avoid problems with #define ({ xxx })
if exists("c_curly_error")
syn match cCurlyError "}"
syn region cBlock start="{" end="}" contains=ALLBUT,cBadBlock,cCurlyError,@cParenGroup,cErrInParen,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell fold
else
syn region cBlock start="{" end="}" transparent fold
endif
" Catch errors caused by wrong parenthesis and brackets.
" Also accept <% for {, %> for }, <: for [ and :> for ] (C99)
" But avoid matching <::.
syn cluster cParenGroup contains=cParenError,cIncluded,cSpecial,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cUserLabel,cBitField,cOctalZero,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom
if exists("c_no_curly_error")
if s:in_cpp_family && !exists("cpp_no_cpp11")
syn region cParen transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
syn match cParenError display ")"
syn match cErrInParen display contained "^^<%\|^%>"
else
syn region cParen transparent start='(' end=')' contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
syn match cParenError display ")"
syn match cErrInParen display contained "^[{}]\|^<%\|^%>"
endif
elseif exists("c_no_bracket_error")
if s:in_cpp_family && !exists("cpp_no_cpp11")
syn region cParen transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
syn match cParenError display ")"
syn match cErrInParen display contained "<%\|%>"
else
syn region cParen transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cParen,cString,@Spell
syn match cParenError display ")"
syn match cErrInParen display contained "[{}]\|<%\|%>"
endif
else
if s:in_cpp_family && !exists("cpp_no_cpp11")
syn region cParen transparent start='(' end=')' contains=ALLBUT,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
syn match cParenError display "[\])]"
syn match cErrInParen display contained "<%\|%>"
syn region cBracket transparent start='\[\|<::\@!' end=']\|:>' contains=ALLBUT,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
else
syn region cParen transparent start='(' end=')' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cCppParen,cErrInBracket,cCppBracket,@cStringGroup,@Spell
" cCppParen: same as cParen but ends at end-of-line; used in cDefine
syn region cCppParen transparent start='(' skip='\\$' excludenl end=')' end='$' contained contains=ALLBUT,@cParenGroup,cErrInBracket,cParen,cBracket,cString,@Spell
syn match cParenError display "[\])]"
syn match cErrInParen display contained "[\]{}]\|<%\|%>"
syn region cBracket transparent start='\[\|<::\@!' end=']\|:>' end='}'me=s-1 contains=ALLBUT,cBlock,@cParenGroup,cErrInParen,cCppParen,cCppBracket,@cStringGroup,@Spell
endif
" cCppBracket: same as cParen but ends at end-of-line; used in cDefine
syn region cCppBracket transparent start='\[\|<::\@!' skip='\\$' excludenl end=']\|:>' end='$' contained contains=ALLBUT,@cParenGroup,cErrInParen,cParen,cBracket,cString,@Spell
syn match cErrInBracket display contained "[);{}]\|<%\|%>"
endif
if s:ft ==# 'c' || exists("cpp_no_cpp11")
syn region cBadBlock keepend start="{" end="}" contained containedin=cParen,cBracket,cBadBlock transparent fold
endif
"integer number, or floating point number without a dot and with "f".
syn case ignore
syn match cNumbers display transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctalError,cOctal
" Same, but without octal error (for comments)
syn match cNumbersCom display contained transparent "\<\d\|\.\d" contains=cNumber,cFloat,cOctal
syn match cNumber display contained "\d\+\%(u\=l\{0,2}\|ll\=u\)\>"
"hex number
syn match cNumber display contained "0x\x\+\%(u\=l\{0,2}\|ll\=u\)\>"
" Flag the first zero of an octal number as something special
syn match cOctal display contained "0\o\+\%(u\=l\{0,2}\|ll\=u\)\>" contains=cOctalZero
syn match cOctalZero display contained "\<0"
"floating point number, with dot, optional exponent
syn match cFloat display contained "\d\+\.\d*\%(e[-+]\=\d\+\)\=[fl]\="
"floating point number, starting with a dot, optional exponent
syn match cFloat display contained "\.\d\+\%(e[-+]\=\d\+\)\=[fl]\=\>"
"floating point number, without dot, with exponent
syn match cFloat display contained "\d\+e[-+]\=\d\+[fl]\=\>"
if !exists("c_no_c99")
"hexadecimal floating point number, optional leading digits, with dot, with exponent
syn match cFloat display contained "0x\x*\.\x\+p[-+]\=\d\+[fl]\=\>"
"hexadecimal floating point number, with leading digits, optional dot, with exponent
syn match cFloat display contained "0x\x\+\.\=p[-+]\=\d\+[fl]\=\>"
endif
" flag an octal number with wrong digits
syn match cOctalError display contained "0\o*[89]\d*"
syn case match
if exists("c_comment_strings")
" A comment can contain cString, cCharacter and cNumber.
" But a "*/" inside a cString in a cComment DOES end the comment! So we
" need to use a special type of cString: cCommentString, which also ends on
" "*/", and sees a "*" at the start of the line as comment again.
" Unfortunately this doesn't very well work for // type of comments :-(
syn match cCommentSkip contained "^\s*\*\%($\|\s\+\)"
syn region cCommentString contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end=+\*/+me=s-1 contains=cSpecial,cCommentSkip
syn region cComment2String contained start=+L\=\\\@<!"+ skip=+\\\\\|\\"+ end=+"+ end="$" contains=cSpecial
syn region cCommentL start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cComment2String,cCharacter,cNumbersCom,cSpaceError,cWrongComTail,@Spell
if exists("c_no_comment_fold")
" Use "extend" here to have preprocessor lines not terminate halfway a
" comment.
syn region cComment matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell extend
else
syn region cComment matchgroup=cCommentStart start="/\*" end="\*/" contains=@cCommentGroup,cCommentStartError,cCommentString,cCharacter,cNumbersCom,cSpaceError,@Spell fold extend
endif
else
syn region cCommentL start="//" skip="\\$" end="$" keepend contains=@cCommentGroup,cSpaceError,@Spell
if exists("c_no_comment_fold")
syn region cComment matchgroup=cCommentStart start="/\*"
|