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" Vim syntax file
" Language:	CSP (Communication Sequential Processes, using FDR input syntax)
" Maintainer:	Jan Bredereke <brederek@tzi.de>
" Version:	0.6.0
" Last change:	Mon Mar 25, 2002
" URL:		http://www.tzi.de/~brederek/vim/
" Copying:	You may distribute and use this file freely, in the same
"		way as the vim editor itself.
"
" To Do:	- Probably I missed some keywords or operators, please
"		  fix them and notify me, the maintainer.
"		- Currently, we do lexical highlighting only. It would be
"		  nice to have more actual syntax checks, including
"		  highlighting of wrong syntax.
"		- The additional syntax for the RT-Tester (pseudo-comments)
"		  should be optional.

" 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

" case is significant to FDR:
syn case match

" Block comments in CSP are between {- and -}
syn region cspComment	start="{-"  end="-}" contains=cspTodo
" Single-line comments start with --
syn region cspComment	start="--"  end="$" contains=cspTodo,cspOldRttComment,cspSdlRttComment keepend

" Numbers:
syn match  cspNumber "\<\d\+\>"

" Conditionals:
syn keyword  cspConditional if then else

" Operators on processes:
" -> ? : ! ' ; /\ \ [] |~| [> & [[..<-..]] ||| [|..|] || [..<->..] ; : @ |||
syn match  cspOperator "->"
syn match  cspOperator "/\\"
syn match  cspOperator "[^/]\\"lc=1
syn match  cspOperator "\[\]"
syn match  cspOperator "|\~|"
syn match  cspOperator "\[>"
syn match  cspOperator "\[\["
syn match  cspOperator "\]\]"
syn match  cspOperator "<-"
syn match  cspOperator "|||"
syn match  cspOperator "[^|]||[^|]"lc=1,me=e-1
syn match  cspOperator "[^|{\~]|[^|}\~]"lc=1,me=e-1
syn match  cspOperator "\[|"
syn match  cspOperator "|\]"
syn match  cspOperator "\[[^>]"me=e-1
syn match  cspOperator "\]"
syn match  cspOperator "<->"
syn match  cspOperator "[?:!';@]"
syn match  cspOperator "&"
syn match  cspOperator "\."

" (not on processes:)
" syn match  cspDelimiter	"{|"
" syn match  cspDelimiter	"|}"
" syn match  cspDelimiter	"{[^-|]"me=e-1
" syn match  cspDelimiter	"[^-|]}"lc=1

" Keywords:
syn keyword cspKeyword		length null head tail concat elem
syn keyword cspKeyword		union inter diff Union Inter member card
syn keyword cspKeyword		empty set Set Seq
syn keyword cspKeyword		true false and or not within let
syn keyword cspKeyword		nametype datatype diamond normal
syn keyword cspKeyword		sbisim tau_loop_factor model_compress
syn keyword cspKeyword		explicate
syn match cspKeyword		"transparent"
syn keyword cspKeyword		external chase prioritize
syn keyword cspKeyword		channel Events
syn keyword cspKeyword		extensions productions
syn keyword cspKeyword		Bool Int

" Reserved keywords:
syn keyword cspReserved		attribute embed module subtype

" Include:
syn region cspInclude matchgroup=cspIncludeKeyword start="^include" end="$" keepend contains=cspIncludeArg
syn region cspIncludeArg start='\s\+\"' end= '\"\s*' contained

" Assertions:
syn keyword cspAssert		assert deterministic divergence free deadlock
syn keyword cspAssert		livelock
syn match cspAssert		"\[T="
syn match cspAssert		"\[F="
syn match cspAssert		"\[FD="
syn match cspAssert		"\[FD\]"
syn match cspAssert		"\[F\]"

" Types and Sets
" (first char a capital, later at least one lower case, no trailing underscore):
syn match cspType     "\<_*[A-Z][A-Z_0-9]*[a-z]\(\|[A-Za-z_0-9]*[A-Za-z0-9]\)\>"

" Processes (all upper case, no trailing underscore):
" (For identifiers that could be types or sets, too, this second rule set
" wins.)
syn match cspProcess		"\<[A-Z_][A-Z_0-9]*[A-Z0-9]\>"
syn match cspProcess		"\<[A-Z_]\>"

" reserved identifiers for tool output (ending in underscore):
syn match cspReservedIdentifier	"\<[A-Za-z_][A-Za-z_0-9]*_\>"

" ToDo markers:
syn match cspTodo		"FIXME"	contained
syn match cspTodo		"TODO"	contained
syn match cspTodo		"!!!"	contained

" RT-Tester pseudo comments:
" (The now obsolete syntax:)
syn match cspOldRttComment	"^--\$\$AM_UNDEF"lc=2		contained
syn match cspOldRttComment	"^--\$\$AM_ERROR"lc=2		contained
syn match cspOldRttComment	"^--\$\$AM_WARNING"lc=2		contained
syn match cspOldRttComment	"^--\$\$AM_SET_TIMER"lc=2	contained
syn match cspOldRttComment	"^--\$\$AM_RESET_TIMER"lc=2	contained
syn match cspOldRttComment	"^--\$\$AM_ELAPSED_TIMER"lc=2	contained
syn match cspOldRttComment	"^--\$\$AM_OUTPUT"lc=2		contained
syn match cspOldRttComment	"^--\$\$AM_INPUT"lc=2		contained
" (The current syntax:)
syn region cspRttPragma matchgroup=cspRttPragmaKeyword start="^pragma\s\+" end="\s*$" oneline keepend contains=cspRttPragmaArg,cspRttPragmaSdl
syn keyword cspRttPragmaArg	AM_ERROR AM_WARNING AM_SET_TIMER contained
syn keyword cspRttPragmaArg	AM_RESET_TIMER AM_ELAPSED_TIMER  contained
syn keyword cspRttPragmaArg	AM_OUTPUT AM_INPUT AM_INTERNAL   contained
" the "SDL_MATCH" extension:
syn region cspRttPragmaSdl	matchgroup=cspRttPragmaKeyword start="SDL_MATCH\s\+" end="\s*$" contains=cspRttPragmaSdlArg contained
syn keyword cspRttPragmaSdlArg	TRANSLATE nextgroup=cspRttPragmaSdlTransName contained
syn keyword cspRttPragmaSdlArg	PARAM SKIP OPTIONAL CHOICE ARRAY nextgroup=cspRttPragmaSdlName contained
syn match cspRttPragmaSdlName	"\s*\S\+\s*" nextgroup=cspRttPragmaSdlTail contained
syn region cspRttPragmaSdlTail  start="" end="\s*$" contains=cspRttPragmaSdlTailArg contained
syn keyword cspRttPragmaSdlTailArg	SUBSET_USED DEFAULT_VALUE Present contained
syn match cspRttPragmaSdlTransName	"\s*\w\+\s*" nextgroup=cspRttPragmaSdlTransTail contained
syn region cspRttPragmaSdlTransTail  start="" end="\s*$" contains=cspRttPragmaSdlTransTailArg contained
syn keyword cspRttPragmaSdlTransTailArg	sizeof contained
syn match cspRttPragmaSdlTransTailArg	"\*" contained
syn match cspRttPragmaSdlTransTailArg	"(" contained
syn match cspRttPragmaSdlTransTailArg	")" contained

" temporary syntax extension for commented-out "pragma SDL_MATCH":
syn match cspSdlRttComment	"pragma\s\+SDL_MATCH\s\+" nextgroup=cspRttPragmaSdlArg contained

syn sync lines=250

" 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_csp_syn_inits")
  if version < 508
    let did_csp_syn_inits = 1
    command -nargs=+ HiLink hi link <args>
  else
    command -nargs=+ HiLink hi def link <args>
  endif

  " The default methods for highlighting.  Can be overridden later
  " (For vim version <=5.7, the command groups are defined in
  " $VIMRUNTIME/syntax/synload.vim )
  HiLink cspComment			Comment
  HiLink cspNumber			Number
  HiLink cspConditional			Conditional
  HiLink cspOperator			Delimiter
  HiLink cspKeyword			Keyword
  HiLink cspReserved			SpecialChar
  HiLink cspInclude			Error
  HiLink cspIncludeKeyword		Include
  HiLink cspIncludeArg			Include
  HiLink cspAssert			PreCondit
  HiLink cspType			Type
  HiLink cspProcess			Function
  HiLink cspTodo			Todo
  HiLink cspOldRttComment		Define
  HiLink cspRttPragmaKeyword		Define
  HiLink cspSdlRttComment		Define
  HiLink cspRttPragmaArg		Define
  HiLink cspRttPragmaSdlArg		Define
  HiLink cspRttPragmaSdlName		Default
  HiLink cspRttPragmaSdlTailArg		Define
  HiLink cspRttPragmaSdlTransName	Default
  HiLink cspRttPragmaSdlTransTailArg	Define
  HiLink cspReservedIdentifier	Error
  " (Currently unused vim method: Debug)

  delcommand HiLink
endif

let b:current_syntax = "csp"

" vim: ts=8