mirror of
https://github.com/neovim/neovim.git
synced 2025-09-07 03:48:18 +00:00
87 lines
3.7 KiB
VimL
87 lines
3.7 KiB
VimL
" Vim syntax file
|
||
" Language: M4
|
||
" Maintainer: Claudio Fleiner (claudio@fleiner.com)
|
||
" Last Change: 2022 Jun 12
|
||
" 2025 Sep 2 by Vim project: fix a few syntax issues #18192
|
||
" 2025 Sep 5 by Vim project: introduce m4Disabled region #18200
|
||
|
||
" 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.
|
||
|
||
" quit when a syntax file was already loaded
|
||
if !exists("main_syntax")
|
||
if exists("b:current_syntax")
|
||
finish
|
||
endif
|
||
" we define it here so that included files can test for it
|
||
let main_syntax='m4'
|
||
endif
|
||
|
||
" Reference: The Open Group Base Specifications, M4
|
||
" https://pubs.opengroup.org/onlinepubs/9799919799/
|
||
|
||
" Quoting in M4:
|
||
" – Quotes are nestable;
|
||
" – The delimiters can be redefined with changequote(); here we only handle
|
||
" the default pair: ` ... ';
|
||
" – Quoted text in M4 is rescanned, not treated as a literal string.
|
||
" Therefore the region is marked transparent so contained items retain
|
||
" their normal highlighting.
|
||
syn region m4Quoted
|
||
\ matchgroup=m4QuoteDelim
|
||
\ start=+`+
|
||
\ end=+'+
|
||
\ contains=@m4Top
|
||
\ transparent
|
||
|
||
" Comments in M4:
|
||
" – According to the Open Group Base Specification, comments start with
|
||
" a <number-sign> (#) and end at <newline>, unless redefined with changecom().
|
||
" We only handle the default here.
|
||
" – Comments in M4 are not like in most languages: they do not remove the text,
|
||
" they simply prevent any macros from being expanded, while the text remains
|
||
" in the output. This region therefore disables any other matches.
|
||
" – Comments themselves are disabled when quoted.
|
||
syn region m4Disabled start=+#+ end=+$+ containedin=ALLBUT,m4Quoted
|
||
|
||
" define the m4 syntax
|
||
syn match m4Variable contained "\$\d\+"
|
||
syn match m4Special contained "$[@*#]"
|
||
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 cluster m4Top contains=m4Comment,m4Constants,m4Special,m4Variable,m4Paren,m4Command,m4Statement,m4Function,m4Quoted
|
||
|
||
" Define the default highlighting.
|
||
" Only when an item doesn't have highlighting yet
|
||
hi def link m4QuoteDelim Delimiter
|
||
hi def link m4Delimiter Delimiter
|
||
hi def link m4Comment Comment
|
||
hi def link m4Function Function
|
||
hi def link m4Keyword Keyword
|
||
hi def link m4Special Special
|
||
hi def link m4Statement Statement
|
||
hi def link m4Preproc PreProc
|
||
hi def link m4Type Type
|
||
hi def link m4Variable Special
|
||
hi def link m4Constants Constant
|
||
hi def link m4Builtin Statement
|
||
|
||
let b:current_syntax = "m4"
|
||
|
||
if main_syntax == 'm4'
|
||
unlet main_syntax
|
||
endif
|
||
|
||
" vim: ts=4
|