" Vim syntax file
" Language:	TADS
" Maintainer:	Amir Karger <karger@post.harvard.edu>
" $Date$
" $Revision$
" Stolen from: Bram Moolenaar's C language file
" Newest version at: http://www.hec.utah.edu/~karger/vim/syntax/tads.vim
" History info at the bottom of the file

" TODO lots more keywords
" global, self, etc. are special *objects*, not functions. They should
" probably be a different color than the special functions
" Actually, should cvtstr etc. be functions?! (change tadsFunction)
" Make global etc. into Identifiers, since we don't have regular variables?

" 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

" A bunch of useful keywords
syn keyword tadsStatement	goto break return continue pass
syn keyword tadsLabel		case default
syn keyword tadsConditional	if else switch
syn keyword tadsRepeat		while for do
syn keyword tadsStorageClass	local compoundWord formatstring specialWords
syn keyword tadsBoolean		nil true

" TADS keywords
syn keyword tadsKeyword		replace modify
syn keyword tadsKeyword		global self inherited
" builtin functions
syn keyword tadsKeyword		cvtstr cvtnum caps lower upper substr
syn keyword tadsKeyword		say length
syn keyword tadsKeyword		setit setscore
syn keyword tadsKeyword		datatype proptype
syn keyword tadsKeyword		car cdr
syn keyword tadsKeyword		defined isclass
syn keyword tadsKeyword		find firstobj nextobj
syn keyword tadsKeyword		getarg argcount
syn keyword tadsKeyword		input yorn askfile
syn keyword tadsKeyword		rand randomize
syn keyword tadsKeyword		restart restore quit save undo
syn keyword tadsException	abort exit exitobj

syn keyword tadsTodo contained	TODO FIXME XXX

" String and Character constants
" Highlight special characters (those which have a backslash) differently
syn match tadsSpecial contained	"\\."
syn region tadsDoubleString		start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=tadsSpecial,tadsEmbedded
syn region tadsSingleString		start=+'+ skip=+\\\\\|\\'+ end=+'+ contains=tadsSpecial
" Embedded expressions in strings
syn region tadsEmbedded contained       start="<<" end=">>" contains=tadsKeyword

" TADS doesn't have \xxx, right?
"syn match cSpecial contained	"\\[0-7][0-7][0-7]\=\|\\."
"syn match cSpecialCharacter	"'\\[0-7][0-7]'"
"syn match cSpecialCharacter	"'\\[0-7][0-7][0-7]'"

"catch errors caused by wrong parenthesis
"syn region cParen		transparent start='(' end=')' contains=ALLBUT,cParenError,cIncluded,cSpecial,cTodo,cUserCont,cUserLabel
"syn match cParenError		")"
"syn match cInParen contained	"[{}]"
syn region tadsBrace		transparent start='{' end='}' contains=ALLBUT,tadsBraceError,tadsIncluded,tadsSpecial,tadsTodo
syn match tadsBraceError		"}"

"integer number (TADS has no floating point numbers)
syn case ignore
syn match tadsNumber		"\<[0-9]\+\>"
"hex number
syn match tadsNumber		"\<0x[0-9a-f]\+\>"
syn match tadsIdentifier	"\<[a-z][a-z0-9_$]*\>"
syn case match
" flag an octal number with wrong digits
syn match tadsOctalError		"\<0[0-7]*[89]"

" Removed complicated c_comment_strings
syn region tadsComment		start="/\*" end="\*/" contains=tadsTodo
syn match tadsComment		"//.*" contains=tadsTodo
syntax match tadsCommentError	"\*/"

syn region tadsPreCondit	start="^\s*#\s*\(if\>\|ifdef\>\|ifndef\>\|elif\>\|else\>\|endif\>\)" skip="\\$" end="$" contains=tadsComment,tadsString,tadsNumber,tadsCommentError
syn region tadsIncluded contained start=+"+ skip=+\\\\\|\\"+ end=+"+
syn match tadsIncluded contained "<[^>]*>"
syn match tadsInclude		"^\s*#\s*include\>\s*["<]" contains=tadsIncluded
syn region tadsDefine		start="^\s*#\s*\(define\>\|undef\>\)" skip="\\$" end="$" contains=ALLBUT,tadsPreCondit,tadsIncluded,tadsInclude,tadsDefine,tadsInBrace,tadsIdentifier

syn region tadsPreProc start="^\s*#\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" contains=ALLBUT,tadsPreCondit,tadsIncluded,tadsInclude,tadsDefine,tadsInParen,tadsIdentifier

" Highlight User Labels
" TODO labels for gotos?
"syn region	cMulti		transparent start='?' end=':' contains=ALLBUT,cIncluded,cSpecial,cTodo,cUserCont,cUserLabel,cBitField
" Avoid matching foo::bar() in C++ by requiring that the next char is not ':'
"syn match	cUserCont	"^\s*\I\i*\s*:$" contains=cUserLabel
"syn match	cUserCont	";\s*\I\i*\s*:$" contains=cUserLabel
"syn match	cUserCont	"^\s*\I\i*\s*:[^:]" contains=cUserLabel
"syn match	cUserCont	";\s*\I\i*\s*:[^:]" contains=cUserLabel

"syn match	cUserLabel	"\I\i*" contained

" identifier: class-name [, class-name [...]] [property-list] ;
" Don't highlight comment in class def
syn match tadsClassDef		"\<class\>[^/]*" contains=tadsObjectDef,tadsClass
syn match tadsClass contained   "\<class\>"
syn match tadsObjectDef "\<[a-zA-Z][a-zA-Z0-9_$]*\s*:\s*[a-zA-Z0-9_$]\+\(\s*,\s*[a-zA-Z][a-zA-Z0-9_$]*\)*\(\s*;\)\="
syn keyword tadsFunction contained function
syn match tadsFunctionDef	 "\<[a-zA-Z][a-zA-Z0-9_$]*\s*:\s*function[^{]*" contains=tadsFunction
"syn region tadsObject		  transparent start = '[a-zA-Z][\i$]\s*:\s*' end=";" contains=tadsBrace,tadsObjectDef

" How far back do we go to find matching groups
if !exists("tads_minlines")
  let tads_minlines = 15
endif
exec "syn sync ccomment tadsComment minlines=" . tads_minlines
if !exists("tads_sync_dist")
  let tads_sync_dist = 100
endif
execute "syn sync maxlines=" . tads_sync_dist

" 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_tads_syn_inits")
  if version < 508
    let did_tads_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
  HiLink tadsFunctionDef Function
  HiLink tadsFunction  Structure
  HiLink tadsClass     Structure
  HiLink tadsClassDef  Identifier
  HiLink tadsObjectDef Identifier
" no highlight for tadsEmbedded, so it prints as normal text w/in the string

  HiLink tadsOperator	Operator
  HiLink tadsStructure	Structure
  HiLink tadsTodo	Todo
  HiLink tadsLabel	Label
  HiLink tadsConditional	Conditional
  HiLink tadsRepeat	Repeat
  HiLink tadsException	Exception
  HiLink tadsStatement	Statement
  HiLink tadsStorageClass	StorageClass
  HiLink tadsKeyWord   Keyword
  HiLink tadsSpecial	SpecialChar
  HiLink tadsNumber	Number
  HiLink tadsBoolean	Boolean
  HiLink tadsDoubleString	tadsString
  HiLink tadsSingleString	tadsString

  HiLink tadsOctalError	tadsError
  HiLink tadsCommentError	tadsError
  HiLink tadsBraceError	tadsError
  HiLink tadsInBrace	tadsError
  HiLink tadsError	Error

  HiLink tadsInclude	Include
  HiLink tadsPreProc	PreProc
  HiLink tadsDefine	Macro
  HiLink tadsIncluded	tadsString
  HiLink tadsPreCondit	PreCondit

  HiLink tadsString	String
  HiLink tadsComment	Comment

  delcommand HiLink
endif


let b:current_syntax = "tads"

" Changes:
" 11/18/99 Added a bunch of TADS functions, tadsException
" 10/22/99 Misspelled Moolenaar (sorry!), c_minlines to tads_minlines
"
" vim: ts=8