ebnf:doc: add syntax file for vim

Signed-off-by: Alejandro Mery <amery@geeks.cl>

ebnf/doc/ebnf.vim

@@ -0,0 +1,36 @@
+" Vim syntax file
+" Language:         EBNF
+" Maintainer:       Hans Fugal
+" Last Change:      $Date: 2003/01/28 14:42:09 $
+" Version:          $Id: ebnf.vim,v 1.1 2003/01/28 14:42:09 fugalh Exp $    
+" With thanks to Michael Brailsford for the BNF syntax file.
+
+" Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+syn match ebnfMetaIdentifier /[A-Za-z]/ skipwhite skipempty nextgroup=ebnfSeperator
+
+syn match ebnfSeperator "=" contained nextgroup=ebnfProduction skipwhite skipempty
+
+syn region ebnfProduction start=/\zs[^\.;]/ end=/[\.;]/me=e-1 contained contains=ebnfSpecial,ebnfDelimiter,ebnfTerminal,ebnfSpecialSequence,ebnfComment nextgroup=ebnfEndProduction skipwhite skipempty
+syn match ebnfDelimiter #[,(|)\]}\[{/!]\|\(\*)\)\|\((\*\)\|\(/)\)\|\(:)\)\|\((/\)\|\((:\)# contained
+syn match ebnfSpecial /[\-\*]/ contained
+syn region ebnfSpecialSequence matchgroup=Delimiter start=/?/ end=/?/ contained
+syn match ebnfEndProduction /[\.;]/ contained 
+syn region ebnfTerminal matchgroup=delimiter start=/"/ end=/"/ contained
+syn region ebnfTerminal matchgroup=delimiter start=/'/ end=/'/ contained
+syn region ebnfComment start="(\*" end="\*)"
+
+
+hi link ebnfComment Comment
+hi link ebnfMetaIdentifier Identifier
+hi link ebnfSeperator ebnfSpecial
+hi link ebnfEndProduction ebnfDelimiter
+hi link ebnfDelimiter Delimiter
+hi link ebnfSpecial Special
+hi link ebnfSpecialSequence Statement
+hi link ebnfTerminal Constant