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" Vim syntax file
" Language: Yacc
" Former Maintainer: Charles E. Campbell
" Last Change: Mar 25, 2019
" Version: 17
" 2024 Feb 19 by Vim Project (announce adoption)
" Former URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_YACC
"
" Options: {{{1
" g:yacc_uses_cpp : if this variable exists, then C++ is loaded rather than C
" ---------------------------------------------------------------------
" this version of syntax/yacc.vim requires 6.0 or later
if exists("b:current_syntax")
syntax clear
endif
" ---------------------------------------------------------------------
" Folding Support {{{1
if has("folding")
com! -nargs=+ SynFold <args> fold
else
com! -nargs=+ SynFold <args>
endif
" ---------------------------------------------------------------------
" Read the C syntax to start with {{{1
" Read the C/C++ syntax to start with
let s:Cpath= fnameescape(expand("<sfile>:p:h").(exists("g:yacc_uses_cpp")? "/cpp.vim" : "/c.vim"))
if !filereadable(s:Cpath)
for s:Cpath in split(globpath(&rtp,(exists("g:yacc_uses_cpp")? "syntax/cpp.vim" : "syntax/c.vim")),"\n")
if filereadable(fnameescape(s:Cpath))
let s:Cpath= fnameescape(s:Cpath)
break
endif
endfor
endif
exe "syn include @yaccCode ".s:Cpath
" ---------------------------------------------------------------------
" Yacc Clusters: {{{1
syn cluster yaccInitCluster contains=yaccKey,yaccKeyActn,yaccBrkt,yaccType,yaccString,yaccUnionStart,yaccHeader2,yaccComment,yaccDefines,yaccParseParam,yaccParseOption
syn cluster yaccRulesCluster contains=yaccNonterminal,yaccString,yaccComment
" ---------------------------------------------------------------------
" Yacc Sections: {{{1
SynFold syn region yaccInit start='.'ms=s-1,rs=s-1 matchgroup=yaccSectionSep end='^%%\ze\(\s*/[*/].*\)\=$'me=e-2,re=e-2 contains=@yaccInitCluster nextgroup=yaccRules skipwhite skipempty contained
SynFold syn region yaccInit2 start='\%^.'ms=s-1,rs=s-1 matchgroup=yaccSectionSep end='^%%\ze\(\s*/[*/].*\)\=$'me=e-2,re=e-2 contains=@yaccInitCluster nextgroup=yaccRules skipwhite skipempty
SynFold syn region yaccHeader2 matchgroup=yaccSep start="^\s*\zs%{" end="^\s*%}" contains=@yaccCode nextgroup=yaccInit skipwhite skipempty contained
SynFold syn region yaccHeader matchgroup=yaccSep start="^\s*\zs%{" end="^\s*%}" contains=@yaccCode nextgroup=yaccInit skipwhite skipempty
SynFold syn region yaccRules matchgroup=yaccSectionSep start='^%%\ze\(\s*/[*/].*\)\=$' end='^%%\ze\(\s*/[*/].*\)\=$'me=e-2,re=e-2 contains=@yaccRulesCluster nextgroup=yaccEndCode skipwhite skipempty contained
SynFold syn region yaccEndCode matchgroup=yaccSectionSep start='^%%\ze\(\s*/[*/].*\)\=$' end='\%$' contains=@yaccCode contained
" ---------------------------------------------------------------------
" Yacc Commands: {{{1
syn match yaccDefines '^%define\s\+.*$'
syn match yaccParseParam '%\(parse\|lex\)-param\>' skipwhite nextgroup=yaccParseParamStr
syn match yaccParseOption '%\%(api\.pure\|pure-parser\|locations\|error-verbose\)\>'
syn region yaccParseParamStr contained matchgroup=Delimiter start='{' end='}' contains=cStructure
syn match yaccDelim "[:|]" contained
syn match yaccOper "@\d\+" contained
syn match yaccKey "^\s*%\(token\|type\|left\|right\|start\|ident\|nonassoc\)\>" contained
syn match yaccKey "\s%\(prec\|expect\)\>" contained
syn match yaccKey "\$\(<[a-zA-Z_][a-zA-Z_0-9]*>\)\=[\$0-9]\+" contained
syn keyword yaccKeyActn yyerrok yyclearin contained
syn match yaccUnionStart "^%union" skipwhite skipnl nextgroup=yaccUnion contained
SynFold syn region yaccUnion matchgroup=yaccCurly start="{" matchgroup=yaccCurly end="}" contains=@yaccCode contained
syn match yaccBrkt "[<>]" contained
syn match yaccType "<[a-zA-Z_][a-zA-Z0-9_]*>" contains=yaccBrkt contained
SynFold syn region yaccNonterminal start="^\s*\a\w*\ze\_s*\(/\*\_.\{-}\*/\)\=\_s*:" matchgroup=yaccDelim end=";" matchgroup=yaccSectionSep end='^%%$'me=e-2,re=e-2 contains=yaccAction,yaccDelim,yaccString,yaccComment contained
syn region yaccComment start="/\*" end="\*/"
syn region yaccComment start="//" end="$"
syn match yaccString "'[^']*'" contained
" ---------------------------------------------------------------------
" I'd really like to highlight just the outer {}. Any suggestions??? {{{1
syn match yaccCurlyError "[{}]"
SynFold syn region yaccAction matchgroup=yaccCurly start="{" end="}" contains=@yaccCode,yaccVar contained
syn match yaccVar '\$\d\+\|\$\$\|\$<\I\i*>\$\|\$<\I\i*>\d\+' containedin=cParen,cPreProc,cMulti contained
" ---------------------------------------------------------------------
" Yacc synchronization: {{{1
syn sync fromstart
" ---------------------------------------------------------------------
" Define the default highlighting. {{{1
if !exists("skip_yacc_syn_inits")
hi def link yaccBrkt yaccStmt
hi def link yaccComment Comment
hi def link yaccCurly Delimiter
hi def link yaccCurlyError Error
hi def link yaccDefines cDefine
hi def link yaccDelim Delimiter
hi def link yaccKeyActn Special
hi def link yaccKey yaccStmt
hi def link yaccNonterminal Function
hi def link yaccOper yaccStmt
hi def link yaccParseOption cDefine
hi def link yaccParseParam yaccParseOption
hi def link yaccSectionSep Todo
hi def link yaccSep Delimiter
hi def link yaccStmt Statement
hi def link yaccString String
hi def link yaccType Type
hi def link yaccUnionStart yaccKey
hi def link yaccVar Special
endif
" ---------------------------------------------------------------------
" Cleanup: {{{1
delcommand SynFold
let b:current_syntax = "yacc"
" ---------------------------------------------------------------------
" Modelines: {{{1
" vim: ts=15 fdm=marker
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