" Vim syntax file
" Language:     SNOBOL4
" Maintainer:   Rafal Sulejman <rms@poczta.onet.pl>
" Site: http://rms.republika.pl/vim/syntax/snobol4.vim
" Last change:  2006 may 1
" Changes: 
" - 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")
  finish
endif

syntax case ignore
" Vanilla 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
syn keyword     snobol4Keyword   size span stoptr
syn keyword     snobol4Keyword   tab table time trace trim terminal
syn keyword     snobol4Keyword   unload
syn keyword     snobol4Keyword   value
" Spitbol keywords
" CSNOBOL keywords
syn keyword     snobol4Keyword   sset

syn region      snobol4String       matchgroup=Quote start=+"+ skip=+\\"+ end=+"+
syn region      snobol4String       matchgroup=Quote start=+'+ skip=+\\'+ end=+'+
syn match       snobol4Statement    "^-[^ ][^ ]*"
syn match       snobol4Comment      "^\*.*$"
syn match       snobol4Comment      ";\*.*$"
syn match       snobol4Constant     "[^a-z]\.[a-z][a-z0-9\-]*"
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       snobol4Label        "^[^-\.\+ \t]\S\{1,}"
"
" 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>
  else
    command -nargs=+ HiLink hi def link <args>
  endif

  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 snobol4String          String
  HiLink snobol4Comment         Comment
  HiLink snobol4Special         Special
  HiLink snobol4Todo            Todo
  HiLink snobol4Keyword         Statement
  HiLink snobol4Function        Statement
  HiLink snobol4Keyword         Keyword
  HiLink snobol4MathsOperator   Operator
  HiLink snobol4ParenError      snobol4Error
  HiLink snobol4ErrInParen      snobol4Error
  HiLink snobol4ErrInBracket    snobol4Error
  HiLink snobol4SysVar          Keyword
  HiLink snobol4BogusSysVar     snobol4Error

  delcommand HiLink
endif

let b:current_syntax = "snobol4"
" vim: ts=8