" Vim syntax file
" Language: C-shell (csh)
" Maintainer: Charles E. Campbell <NdrOchipS@PcampbellAfamily.Mbiz>
" Last Change: Aug 31, 2016
" Version: 13
" URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_CSH
" quit when a syntax file was already loaded
if exists("b:current_syntax")
finish
endif
" clusters:
syn cluster cshQuoteList contains=cshDblQuote,cshSnglQuote,cshBckQuote
syn cluster cshVarList contains=cshExtVar,cshSelector,cshQtyWord,cshArgv,cshSubst
" Variables which affect the csh itself
syn match cshSetVariables contained "argv\|histchars\|ignoreeof\|noglob\|prompt\|status"
syn match cshSetVariables contained "cdpath\|history\|mail\|nonomatch\|savehist\|time"
syn match cshSetVariables contained "cwd\|home\|noclobber\|path\|shell\|verbose"
syn match cshSetVariables contained "echo"
syn case ignore
syn keyword cshTodo contained todo
syn case match
" Variable Name Expansion Modifiers
syn match cshModifier contained ":\(h\|t\|r\|q\|x\|gh\|gt\|gr\)"
" Strings and Comments
syn match cshNoEndlineDQ contained "[^\"]\(\\\\\)*$"
syn match cshNoEndlineSQ contained "[^\']\(\\\\\)*$"
syn match cshNoEndlineBQ contained "[^\`]\(\\\\\)*$"
syn region cshDblQuote start=+[^\\]"+lc=1 skip=+\\\\\|\\"+ end=+"+ contains=cshSpecial,cshShellVariables,cshExtVar,cshSelector,cshQtyWord,cshArgv,cshSubst,cshNoEndlineDQ,cshBckQuote,@Spell
syn region cshSnglQuote start=+[^\\]'+lc=1 skip=+\\\\\|\\'+ end=+'+ contains=cshNoEndlineSQ,@Spell
syn region cshBckQuote start=+[^\\]`+lc=1 skip=+\\\\\|\\`+ end=+`+ contains=cshNoEndlineBQ,@Spell
syn region cshDblQuote start=+^"+ skip=+\\\\\|\\"+ end=+"+ contains=cshSpecial,cshExtVar,cshSelector,cshQtyWord,cshArgv,cshSubst,cshNoEndlineDQ,@Spell
syn region cshSnglQuote start=+^'+ skip=+\\\\\|\\'+ end=+'+ contains=cshNoEndlineSQ,@Spell
syn region cshBckQuote start=+^`+ skip=+\\\\\|\\`+ end=+`+ contains=cshNoEndlineBQ,@Spell
syn cluster cshCommentGroup contains=cshTodo,@Spell
syn match cshComment "#.*$" contains=@cshCommentGroup
" A bunch of useful csh keywords
syn keyword cshStatement alias end history onintr setenv unalias
syn keyword cshStatement cd eval kill popd shift unhash
syn keyword cshStatement chdir exec login pushd source
syn keyword cshStatement continue exit logout rehash time unsetenv
syn keyword cshStatement dirs glob nice repeat umask wait
syn keyword cshStatement echo goto nohup
syn keyword cshConditional break case else endsw switch
syn keyword cshConditional breaksw default endif
syn keyword cshRepeat foreach
" Special environment variables
syn keyword cshShellVariables HOME LOGNAME PATH TERM USER
" Modifiable Variables without {}
syn match cshExtVar "\$[a-zA-Z_][a-zA-Z0-9_]*\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=" contains=cshModifier
syn match cshSelector "\$[a-zA-Z_][a-zA-Z0-9_]*\[[a-zA-Z_]\+\]\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=" contains=cshModifier
syn match cshQtyWord "\$#[a-zA-Z_][a-zA-Z0-9_]*\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=" contains=cshModifier
syn match cshArgv "\$\d\+\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=" contains=cshModifier
syn match cshArgv "\$\*\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=" contains=cshModifier
" Modifiable Variables with {}
syn match cshExtVar "\${[a-zA-Z_][a-zA-Z0-9_]*\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=}" contains=cshModifier
syn match cshSelector "\${[a-zA-Z_][a-zA-Z0-9_]*\[[a-zA-Z_]\+\]\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=}" contains=cshModifier
syn match cshQtyWord "\${#[a-zA-Z_][a-zA-Z0-9_]*\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=}" contains=cshModifier
syn match cshArgv "\${\d\+\(:h\|:t\|:r\|:q\|:x\|:gh\|:gt\|:gr\)\=}" contains=cshModifier
" UnModifiable Substitutions
syn match cshSubstError "\$?[a-zA-Z_][a-zA-Z0-9_]*:\(h\|t\|r\|q\|x\|gh\|gt\|gr\)"
syn match cshSubstError "\${?[a-zA-Z_][a-zA-Z0-9_]*:\(h\|t\|r\|q\|x\|gh\|gt\|gr\)}"
syn match cshSubstError "\$?[0$<]:\(h\|t\|r\|q\|x\|gh\|gt\|gr\)"
syn match cshSubst "\$?[a-zA-Z_][a-zA-Z0-9_]*"
syn match cshSubst "\${?[a-zA-Z_][a-zA-Z0-9_]*}"
syn match cshSubst "\$?[0$<]"
" I/O redirection
syn match cshRedir ">>&!\|>&!\|>>&\|>>!\|>&\|>!\|>>\|<<\|>\|<"
" Handle set expressions
syn region cshSetExpr matchgroup=cshSetStmt start="\<set\>\|\<unset\>" end="$\|;" contains=cshComment,cshSetStmt,cshSetVariables,@cshQuoteList
" Operators and Expression-Using constructs
"syn match cshOperator contained "&&\|!\~\|!=\|<<\|<=\|==\|=\~\|>=\|>>\|\*\|\^\|\~\|||\|!\|\|%\|&\|+\|-\|/\|<\|>\||"
syn match cshOperator contained "&&\|!\~\|!=\|<<\|<=\|==\|=\~\|>=\|>>\|\*\|\^\|\~\|||\|!\|%\|&\|+\|-\|/\|<\|>\||"
syn match cshOperator contained "[(){}]"
syn region cshTest matchgroup=cshStatement start="\<if\>\|\<while\>" skip="\\$" matchgroup=cshStatement end="\<then\>\|$" contains=cshComment,cshOperator,@cshQuoteList,@cshVarLIst
" Highlight special characters (those which have a backslash) differently
syn match cshSpecial contained "\\\d\d\d\|\\[abcfnrtv\\]"
syn match cshNumber "-\=\<\d\+\>"
" All other identifiers
"syn match cshIdentifier "\<[a-zA-Z._][a-zA-Z0-9._]*\>"
" Shell Input Redirection (Here Documents)
syn region cshHereDoc matchgroup=cshRedir start="<<-\=\s*\**\z(\h\w*\)\**" matchgroup=cshRedir end="^\z1$"
" Define the default highlighting.
if !exists("skip_csh_syntax_inits")
hi def link cshArgv cshVariables
hi def link cshBckQuote cshCommand
hi def link cshDblQuote cshString
hi def link cshExtVar cshVariables
hi def link cshHereDoc cshString
hi def link cshNoEndlineBQ cshNoEndline
hi def link cshNoEndlineDQ cshNoEndline
hi def link cshNoEndlineSQ cshNoEndline
hi def link cshQtyWord cshVariables
hi def link cshRedir cshOperator
hi def link cshSelector cshVariables
hi def link cshSetStmt cshStatement
hi def link cshSetVariables cshVariables
hi def link cshSnglQuote cshString
hi def link cshSubst cshVariables
hi def link cshCommand Statement
hi def link cshComment Comment
hi def link cshConditional Conditional
hi def link cshIdentifier Error
hi def link cshModifier Special
hi def link cshNoEndline Error
hi def link cshNumber Number
hi def link cshOperator Operator
hi def link cshRedir Statement
hi def link cshRepeat Repeat
hi def link cshShellVariables Special
hi def link cshSpecial Special
hi def link cshStatement Statement
hi def link cshString String
hi def link cshSubstError Error
hi def link cshTodo Todo
hi def link cshVariables Type
endif
let b:current_syntax = "csh"
" vim: ts=18
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