/usr/share/vim/vim74/syntax/m4.vim is in vim-runtime 2:7.4.052-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | " Vim syntax file
" Language: M4
" Maintainer: Claudio Fleiner (claudio@fleiner.com)
" URL: http://www.fleiner.com/vim/syntax/m4.vim
" Last Change: 2005 Jan 15
" This file will highlight user function calls if they use only
" capital letters and have at least one argument (i.e. the '('
" must be there). Let me know if this is a problem.
" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if !exists("main_syntax")
if version < 600
syntax clear
elseif exists("b:current_syntax")
finish
endif
" we define it here so that included files can test for it
let main_syntax='m4'
endif
" define the m4 syntax
syn match m4Variable contained "\$\d\+"
syn match m4Special contained "$[@*#]"
syn match m4Comment "\<\(m4_\)\=dnl\>.*" contains=SpellErrors
syn match m4Constants "\<\(m4_\)\=__file__"
syn match m4Constants "\<\(m4_\)\=__line__"
syn keyword m4Constants divnum sysval m4_divnum m4_sysval
syn region m4Paren matchgroup=m4Delimiter start="(" end=")" contained contains=@m4Top
syn region m4Command matchgroup=m4Function start="\<\(m4_\)\=\(define\|defn\|pushdef\)(" end=")" contains=@m4Top
syn region m4Command matchgroup=m4Preproc start="\<\(m4_\)\=\(include\|sinclude\)("he=e-1 end=")" contains=@m4Top
syn region m4Command matchgroup=m4Statement start="\<\(m4_\)\=\(syscmd\|esyscmd\|ifdef\|ifelse\|indir\|builtin\|shift\|errprint\|m4exit\|changecom\|changequote\|changeword\|m4wrap\|debugfile\|divert\|undivert\)("he=e-1 end=")" contains=@m4Top
syn region m4Command matchgroup=m4builtin start="\<\(m4_\)\=\(len\|index\|regexp\|substr\|translit\|patsubst\|format\|incr\|decr\|eval\|maketemp\)("he=e-1 end=")" contains=@m4Top
syn keyword m4Statement divert undivert
syn region m4Command matchgroup=m4Type start="\<\(m4_\)\=\(undefine\|popdef\)("he=e-1 end=")" contains=@m4Top
syn region m4Function matchgroup=m4Type start="\<[_A-Z][_A-Z0-9]*("he=e-1 end=")" contains=@m4Top
syn region m4String start="`" end="'" contained contains=@m4Top,@m4StringContents,SpellErrors
syn cluster m4Top contains=m4Comment,m4Constants,m4Special,m4Variable,m4String,m4Paren,m4Command,m4Statement,m4Function
" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
if version >= 508 || !exists("did_m4_syn_inits")
if version < 508
let did_m4_syn_inits = 1
command -nargs=+ HiLink hi link <args>
else
command -nargs=+ HiLink hi def link <args>
endif
HiLink m4Delimiter Delimiter
HiLink m4Comment Comment
HiLink m4Function Function
HiLink m4Keyword Keyword
HiLink m4Special Special
HiLink m4String String
HiLink m4Statement Statement
HiLink m4Preproc PreProc
HiLink m4Type Type
HiLink m4Special Special
HiLink m4Variable Special
HiLink m4Constants Constant
HiLink m4Builtin Statement
delcommand HiLink
endif
let b:current_syntax = "m4"
if main_syntax == 'm4'
unlet main_syntax
endif
" vim: ts=4
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