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" Vim syntax file
" Language: SNOBOL4
" Maintainer: Rafal Sulejman <>
" Site:
" Last change: 2006 may 10
" Changes:
" - strict snobol4 mode (set snobol4_strict_mode to activate)
" - incorrect HL of dots in strings corrected
" - incorrect HL of dot-variables in parens corrected
" - one character labels weren't displayed correctly.
" - nonexistent Snobol4 keywords displayed as errors.
" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if version < 600
syntax clear
elseif exists("b:current_syntax")
syntax case ignore
" Snobol4 keywords
syn keyword snobol4Keyword any apply arb arbno arg array
syn keyword snobol4Keyword break
syn keyword snobol4Keyword char clear code collect convert copy
syn keyword snobol4Keyword data datatype date define detach differ dump dupl
syn keyword snobol4Keyword endfile eq eval
syn keyword snobol4Keyword field
syn keyword snobol4Keyword ge gt ident
syn keyword snobol4Keyword input integer item
syn keyword snobol4Keyword le len lgt local lpad lt
syn keyword snobol4Keyword ne notany
syn keyword snobol4Keyword opsyn output
syn keyword snobol4Keyword pos prototype
syn keyword snobol4Keyword remdr replace rpad rpos rtab rewind
syn keyword snobol4Keyword size span stoptr
syn keyword snobol4Keyword tab table time trace trim terminal
syn keyword snobol4Keyword unload
syn keyword snobol4Keyword value
" CSNOBOL keywords
syn keyword snobol4ExtKeyword breakx
syn keyword snobol4ExtKeyword char chop
syn keyword snobol4ExtKeyword date delete
syn keyword snobol4ExtKeyword exp
syn keyword snobol4ExtKeyword freeze function
syn keyword snobol4ExtKeyword host
syn keyword snobol4ExtKeyword io_findunit
syn keyword snobol4ExtKeyword label lpad leq lge lle llt lne log
syn keyword snobol4ExtKeyword ord
syn keyword snobol4ExtKeyword reverse rpad rsort rename
syn keyword snobol4ExtKeyword serv_listen sset set sort sqrt substr
syn keyword snobol4ExtKeyword thaw
syn keyword snobol4ExtKeyword vdiffer
syn region snobol4String matchgroup=Quote start=+"+ end=+"+
syn region snobol4String matchgroup=Quote start=+'+ end=+'+
syn match snobol4BogusStatement "^-[^ ][^ ]*"
syn match snobol4Statement "^-\(include\|copy\|module\|line\|plusopts\|case\|error\|noerrors\|list\|unlist\|execute\|noexecute\|copy\)"
syn match snobol4Constant /"[^a-z"']\.[a-z][a-z0-9\-]*"/hs=s+1
syn region snobol4Goto start=":[sf]\{0,1}(" end=")\|$\|;" contains=ALLBUT,snobol4ParenError
syn match snobol4Number "\<\d*\(\.\d\d*\)*\>"
syn match snobol4BogusSysVar "&\w\{1,}"
syn match snobol4SysVar "&\(abort\|alphabet\|anchor\|arb\|bal\|case\|code\|dump\|errlimit\|errtext\|errtype\|fail\|fence\|fnclevel\|ftrace\|fullscan\|input\|lastno\|lcase\|maxlngth\|output\|parm\|rem\|rtntype\|stcount\|stfcount\|stlimit\|stno\|succeed\|trace\|trim\|ucase\)"
syn match snobol4ExtSysVar "&\(gtrace\|line\|file\|lastline\|lastfile\)"
syn match snobol4Label "\(^\|;\)[^-\.\+ \t\*\.]\{1,}[^ \t\*\;]*"
syn match snobol4Comment "\(^\|;\)\([\*\|!;#].*$\)"
" Parens matching
syn cluster snobol4ParenGroup contains=snobol4ParenError
syn region snobol4Paren transparent start='(' end=')' contains=ALLBUT,@snobol4ParenGroup,snobol4ErrInBracket
syn match snobol4ParenError display "[\])]"
syn match snobol4ErrInParen display contained "[\]{}]\|<%\|%>"
syn region snobol4Bracket transparent start='\[\|<:' end=']\|:>' contains=ALLBUT,@snobol4ParenGroup,snobol4ErrInParen
syn match snobol4ErrInBracket display contained "[){}]\|<%\|%>"
" optional shell shebang line
" syn match snobol4Comment "^\#\!.*$"
" 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_snobol4_syntax_inits")
if version < 508
let did_snobol4_syntax_inits = 1
command -nargs=+ HiLink hi link <args>
command -nargs=+ HiLink hi def link <args>
HiLink snobol4Constant Constant
HiLink snobol4Label Label
HiLink snobol4Goto Repeat
HiLink snobol4Conditional Conditional
HiLink snobol4Repeat Repeat
HiLink snobol4Number Number
HiLink snobol4Error Error
HiLink snobol4Statement PreProc
HiLink snobol4BogusStatement snobol4Error
HiLink snobol4String String
HiLink snobol4Comment Comment
HiLink snobol4Special Special
HiLink snobol4Todo Todo
HiLink snobol4Keyword Keyword
HiLink snobol4Function Function
HiLink snobol4MathsOperator Operator
HiLink snobol4ParenError snobol4Error
HiLink snobol4ErrInParen snobol4Error
HiLink snobol4ErrInBracket snobol4Error
HiLink snobol4SysVar Keyword
HiLink snobol4BogusSysVar snobol4Error
if exists("snobol4_strict_mode")
HiLink snobol4ExtSysVar WarningMsg
HiLink snobol4ExtKeyword WarningMsg
HiLink snobol4ExtSysVar snobol4SysVar
HiLink snobol4ExtKeyword snobol4Keyword
delcommand HiLink
let b:current_syntax = "snobol4"
" vim: ts=8
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