" Vim syntax file
" Language:	B (A Formal Method with refinement and mathematical proof)
" Maintainer:	Mathieu Clabaut <mathieu.clabaut@gmail.com>
" Contributor:  Csaba Hoch
" LastChange:	8 Dec 2007


" quit when a syntax file was already loaded
if exists("b:current_syntax")
   finish
endif


" A bunch of useful B keywords
syn keyword bStatement	        MACHINE MODEL SEES OPERATIONS INCLUDES DEFINITIONS CONSTRAINTS CONSTANTS VARIABLES CONCRETE_CONSTANTS CONCRETE_VARIABLES ABSTRACT_CONSTANTS ABSTRACT_VARIABLES HIDDEN_CONSTANTS HIDDEN_VARIABLES ASSERT ASSERTIONS  EXTENDS IMPLEMENTATION REFINEMENT IMPORTS USES INITIALISATION INVARIANT PROMOTES PROPERTIES REFINES SETS VALUES VARIANT VISIBLE_CONSTANTS VISIBLE_VARIABLES THEORY XLS THEOREMS LOCAL_OPERATIONS
syn keyword bLabel		CASE IN EITHER OR CHOICE DO OF
syn keyword bConditional	IF ELSE SELECT ELSIF THEN WHEN
syn keyword bRepeat		WHILE FOR
syn keyword bOps		bool card conc closure closure1 dom first fnc front not or id inter iseq iseq1 iterate last max min mod perm pred prj1 prj2 ran rel rev seq seq1 size skip succ tail union
syn keyword bKeywords		LET VAR BE IN BEGIN END  POW POW1 FIN FIN1  PRE  SIGMA STRING UNION IS ANY WHERE

syn keyword bBoolean	TRUE FALSE bfalse btrue
syn keyword bConstant	PI MAXINT MININT User_Pass PatchProver PatchProverH0 PatchProverB0 FLAT ARI DED SUB RES
syn keyword bGuard binhyp band bnot bguard bsearch bflat bfresh bguardi bget bgethyp barith bgetresult bresult bgoal bmatch bmodr bnewv  bnum btest bpattern bprintf bwritef bsubfrm  bvrb blvar bcall bappend bclose

syn keyword bLogic	or not
syn match bLogic	"\(!\|#\|%\|&\|+->>\|+->\|-->>\|->>\|-->\|->\|/:\|/<:\|/<<:\|/=\|/\\\|/|\\\|::\|:\|;:\|<+\|<->\|<--\|<-\|<:\|<<:\|<<|\|<=>\|<|\|==\|=>\|>+>>\|>->\|>+>\|||\||->\)"
syn match bNothing      /:=/

syn keyword cTodo contained	TODO FIXME XXX

" String and Character constants
" Highlight special characters (those which have a backslash) differently
syn match bSpecial contained	"\\[0-7][0-7][0-7]\=\|\\."
syn region bString		start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=bSpecial
syn match bCharacter		"'[^\\]'"
syn match bSpecialCharacter	"'\\.'"
syn match bSpecialCharacter	"'\\[0-7][0-7]'"
syn match bSpecialCharacter	"'\\[0-7][0-7][0-7]'"

"catch errors caused by wrong parenthesis
syn region bParen		transparent start='(' end=')' contains=ALLBUT,bParenError,bIncluded,bSpecial,bTodo,bUserLabel,bBitField
syn match bParenError		")"
syn match bInParen contained	"[{}]"

"integer number, or floating point number without a dot and with "f".
syn case ignore
syn match bNumber		"\<[0-9]\+\>"
"syn match bIdentifier	"\<[a-z_][a-z0-9_]*\>"
syn case match

  syn region bComment		start="/\*" end="\*/" contains=bTodo
  syn match bComment		"//.*" contains=bTodo
syntax match bCommentError	"\*/"

syn keyword bType		INT INTEGER BOOL NAT NATURAL NAT1 NATURAL1

syn region bPreCondit	start="^\s*#\s*\(if\>\|ifdef\>\|ifndef\>\|elif\>\|else\>\|endif\>\)" skip="\\$" end="$" contains=bComment,bString,bCharacter,bNumber,bCommentError
syn region bIncluded contained start=+"+ skip=+\\\\\|\\"+ end=+"+
syn match bIncluded contained "<[^>]*>"
syn match bInclude		"^\s*#\s*include\>\s*["<]" contains=bIncluded

syn region bDefine		start="^\s*#\s*\(define\>\|undef\>\)" skip="\\$" end="$" contains=ALLBUT,bPreCondit,bIncluded,bInclude,bDefine,bInParen
syn region bPreProc		start="^\s*#\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" contains=ALLBUT,bPreCondit,bIncluded,bInclude,bDefine,bInParen

syn sync ccomment bComment minlines=10

" Define the default highlighting.
" Only when an item doesn't have highlighting yet

command -nargs=+ HiLink hi def link <args>

" The default methods for highlighting.  Can be overridden later
HiLink bLabel	Label
HiLink bUserLabel	Label
HiLink bConditional	Conditional
HiLink bRepeat	Repeat
HiLink bLogic	Special
HiLink bCharacter	Character
HiLink bSpecialCharacter bSpecial
HiLink bNumber	Number
HiLink bFloat	Float
HiLink bOctalError	bError
HiLink bParenError	bError
" HiLink bInParen	bError
HiLink bCommentError	bError
HiLink bBoolean	Identifier
HiLink bConstant	Identifier
HiLink bGuard	Identifier
HiLink bOperator	Operator
HiLink bKeywords	Operator
HiLink bOps		Identifier
HiLink bStructure	Structure
HiLink bStorageClass	StorageClass
HiLink bInclude	Include
HiLink bPreProc	PreProc
HiLink bDefine	Macro
HiLink bIncluded	bString
HiLink bError	Error
HiLink bStatement	Statement
HiLink bPreCondit	PreCondit
HiLink bType		Type
HiLink bCommentError	bError
HiLink bCommentString bString
HiLink bComment2String bString
HiLink bCommentSkip	bComment
HiLink bString	String
HiLink bComment	Comment
HiLink bSpecial	SpecialChar
HiLink bTodo		Todo
"hi link bIdentifier	Identifier
delcommand HiLink

let b:current_syntax = "b"

" vim: ts=8