" Vim syntax file
" Language: Treetop
" Maintainer: Nikolai Weibull <[email protected]>
" Latest Revision: 2011-03-14

if exists("b:current_syntax")
finish
endif

let s:cpo_save = &cpo
set cpo&vim

syn keyword treetopTodo
\ contained
\ TODO
\ FIXME
\ XXX
\ NOTE

syn match treetopComment
\ '#.*'
\ display
\ contains=treetopTodo

syn include @treetopRuby syntax/ruby.vim
unlet b:current_syntax

syn keyword treetopKeyword
\ require
\ end
syn region treetopKeyword
\ matchgroup=treetopKeyword
\ start='\<\%(grammar\|include\|module\)\>\ze\s'
\ end='$'
\ transparent
\ oneline
\ keepend
\ contains=@treetopRuby
syn keyword treetopKeyword
\ rule
\ nextgroup=treetopRuleName
\ skipwhite skipnl

syn match treetopGrammarName
\ '\u\w*'
\ contained

syn match treetopRubyModuleName
\ '\u\w*'
\ contained

syn match treetopRuleName
\ '\h\w*'
\ contained

syn region treetopString
\ matchgroup=treetopStringDelimiter
\ start=+"+
\ end=+"+
syn region treetopString
\ matchgroup=treetopStringDelimiter
\ start=+'+
\ end=+'+

syn region treetopCharacterClass
\ matchgroup=treetopCharacterClassDelimiter
\ start=+\[+
\ skip=+\\\]+
\ end=+\]+

syn region treetopRubyBlock
\ matchgroup=treetopRubyBlockDelimiter
\ start=+{+
\ end=+}+
\ contains=@treetopRuby

syn region treetopSemanticPredicate
\ matchgroup=treetopSemanticPredicateDelimiter
\ start=+[!&]{+
\ end=+}+
\ contains=@treetopRuby

syn region treetopSubclassDeclaration
\ matchgroup=treetopSubclassDeclarationDelimiter
\ start=+<+
\ end=+>+
\ contains=@treetopRuby

syn match treetopEllipsis
\ +''+

hi def link treetopTodo Todo
hi def link treetopComment Comment
hi def link treetopKeyword Keyword
hi def link treetopGrammarName Constant
hi def link treetopRubyModuleName Constant
hi def link treetopRuleName Identifier
hi def link treetopString String
hi def link treetopStringDelimiter treetopString
hi def link treetopCharacterClass treetopString
hi def link treetopCharacterClassDelimiter treetopCharacterClass
hi def link treetopRubyBlockDelimiter PreProc
hi def link treetopSemanticPredicateDelimiter PreProc
hi def link treetopSubclassDeclarationDelimiter PreProc
hi def link treetopEllipsis Special

let b:current_syntax = 'treetop'

let &cpo = s:cpo_save
unlet s:cpo_save