syn keyword zshShellVariables HOST LINENO MACHTYPE OLDPWD OPTARG
syn keyword zshShellVariables OPTIND OSTYPE PPID PWD RANDOM SECONDS
syn keyword zshShellVariables SHLVL TTY signals TTYIDLE USERNAME
syn keyword zshShellVariables VENDOR ZSH_NAME ZSH_VERSION ARGV0
syn keyword zshShellVariables BAUD COLUMNS cdpath DIRSTACKSIZE
syn keyword zshShellVariables FCEDIT fignore fpath histchars HISTCHARS
syn keyword zshShellVariables HISTFILE HISTSIZE KEYTIMEOUT LANG
syn keyword zshShellVariables LC_ALL LC_COLLATE LC_CTYPE LC_MESSAGES
syn keyword zshShellVariables LC_TIME LINES LISTMAX LOGCHECK mailpath
syn keyword zshShellVariables MAILPATH MANPATH manpath module_path
syn keyword zshShellVariables MODULE_PATH NULLCMD path POSTEDIT
syn keyword zshShellVariables PS3 PS4 PROMPT PROMPT2 PROMPT3 PROMPT4
syn keyword zshShellVariables psvar PSVAR prompt READNULLCMD
syn keyword zshShellVariables REPORTTIME RPROMPT RPS1 SAVEHIST
syn keyword zshShellVariables SPROMPT STTY TIMEFMT TMOUT TMPPREFIX
syn keyword zshShellVariables watch WATCH WATCHFMT WORDCHARS ZDOTDIR
syn match zshSpecialShellVar "\$[-#@*$?!0-9]"
syn keyword zshSetVariables ignoreeof noclobber
syn region zshDerefOpr start="\${" end="}" contains=zshShellVariables
syn match zshDerefIdentifier "\$[a-zA-Z_][a-zA-Z0-9_]*\>"
syn match zshOperator "[][}{&;|)(]"
" String and Character contstants
" Highlight special characters (those which have a backslash) differently
syn match zshSpecial contained "\\\d\d\d\|\\[abcfnrtv\\]"
syn match zshNumber "-\=\<\d\+\>"
syn match zshComment "#.*$" contains=zshNumber,zshTodo
syn match zshTestOpr "-\<[oeaznlg][tfqet]\=\>\|!\==\|-\<[b-gkLprsStuwjxOG]\>"
"syn region zshTest start="\[" skip="\\$" end="\]" contains=zshString,zshTestOpr,zshDerefIdentifier,zshDerefOpr
syn region zshString start=+"+ skip=+\\"+ end=+"+ contains=zshSpecial,zshOperator,zshDerefIdentifier,zshDerefOpr,zshSpecialShellVar,zshSinglequote,zshCommandSub
if !exists("did_zsh_syntax_inits")
let did_zsh_syntax_inits = 1
" The default methods for highlighting. Can be overridden later
hi link zshSinglequote zshString
hi link zshConditional zshStatement
hi link zshRepeat zshStatement
hi link zshFunctionName zshFunction
hi link zshCommandSub zshOperator
hi link zshRedir zshOperator
hi link zshSetVariables zshShellVariables
hi link zshSpecialShellVar zshShellVariables
hi link zshTestOpr zshOperator
hi link zshDerefOpr zshSpecial
hi link zshDerefIdentifier zshShellVariables
hi link zshOperator Operator
hi link zshStatement Statement
hi link zshNumber Number
hi link zshString String
hi link zshComment Comment
hi link zshSpecial Special
hi link zshTodo Todo
hi link zshShellVariables Special
" hi zshOperator term=underline ctermfg=6 guifg=Purple gui=bold
" hi zshShellVariables term=underline ctermfg=2 guifg=SeaGreen gui=bold