" Vim syntax file
" Language:	Attribute Grammars
" Maintainer:	Juan Jose Olivera <jotajota@hetnet.nl>
" URL:		http://j2.punku.org/scripts/vim/ag.vim
" Last Change:	$Date: 2006-05-12 17:36:43
" Filenames:	*.ag
" Version:	0.0.1
" Bugs: 	{-- and { problem
"

if !exists("main_syntax")
  if version < 600
    syntax clear
  elseif exists("b:current_syntax")
    finish
  endif
  let main_syntax = 'ag'
endif

"program keywords
syntax keyword agKeywords  DATA EXT ATTR SEM TYPE USE loc lhs INCLUDE hd tl
syntax keyword agType 	   String Int Char Bool 

"Characters
syn match   agSpecialChar contained  "\\\([4-9]\d\|[0-3]\d\d\|[\"\\'ntbrf]\|u\x\{4\}\)"

"Comments
syntax region agComments start="--*" end="\n"
syntax region agBigComments start="{--*" end="--}"

"Operators 
syntax match agOps "|\|=\|+\|++\|\*\|\\\|@\|\[\|]\|->\|(\|)\|{\|}\|:\|\."  

"Strings 
syntax region   agString  start=+"+ end=+"+ end=+$+ contains=agSpecialChar,@Spell

syntax sync fromstart 
syntax sync maxlines=300

"Define the default highlighting
"Controling for versions earlier than 5.8, for later versions only if some
"item doesn't have highlighting
if version >= 508 || !exists("did_ag_syn_inits")
    let did_ag_syn_inits = 1
    hi link agKeywords 		KeyWord
    hi link agComments 		Comment
    hi link agOps      		KeyWord
    hi link agString   		string
    hi link agSpecialChar 	string
    hi link agType		Type
    hi link agBigComments	Comment
endif

" Removing , while it didn't work because we are loaded
" firs
" t.
" "syntax clear ag
let b:current_syntax = "ag"
if main_syntax == 'ag'
  unlet main_syntax
endif