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" Vim syntax file
" Language: Lex
" Maintainer: Dr. Charles E. Campbell, Jr. <Charles.Campbell@gsfc.nasa.gov>
" Last change: Aug 27, 1998
" Remove any old syntax stuff hanging around
syn clear
" Read the C syntax to start with
so <sfile>:p:h/c.vim
" --- Lex stuff ---
"I'd prefer to use lex.* , but it doesn't handle forward definitions yet
syn cluster lexListGroup contains=lexAbbrvBlock,lexAbbrv,lexAbbrv,lexAbbrvRegExp,lexInclude,lexPatBlock,lexPat,lexBrace,lexPatString,lexPatTag,lexPatTag,lexPatComment,lexPatCodeLine,lexMorePat,lexPatSep,lexSlashQuote,lexPatCode,cInParen
syn cluster lexListPatCodeGroup contains=lexAbbrvBlock,lexAbbrv,lexAbbrv,lexAbbrvRegExp,lexInclude,lexPatBlock,lexPat,lexBrace,lexPatTag,lexPatTag,lexPatComment,lexPatCodeLine,lexMorePat,lexPatSep,lexSlashQuote,cInParen
" Abbreviations Section
syn region lexAbbrvBlock start="^\([a-zA-Z_]\+\t\|%{\)" end="^%%$"me=e-2 skipnl nextgroup=lexPatBlock contains=lexAbbrv,lexInclude
syn match lexAbbrv "^\I\i*\s"me=e-1 skipwhite contained nextgroup=lexAbbrvRegExp
syn match lexAbbrv "^%[sx]" contained
syn match lexAbbrvRegExp "\s\S.*$"lc=1 contained nextgroup=lexAbbrv,lexInclude
syn region lexInclude matchgroup=lexSep start="^%{" end="%}" contained contains=ALLBUT,@lexListGroup
"%% : Patterns {Actions}
syn region lexPatBlock matchgroup=Todo start="^%%$" matchgroup=Todo end="^%%$" skipnl skipwhite contains=lexPat,lexPatTag,lexPatComment
syn region lexPat start=+\S+ skip="\(\\\\\)*\\." end="\s"me=e-1 contained nextgroup=lexMorePat,lexPatSep contains=lexPatString,lexSlashQuote,lexBrace
syn region lexBrace start="\[" skip=+\(\\\\\)*\\+ end="]" contained
syn region lexPatString matchgroup=String start=+"+ skip=+\(\\\\\)*\\"+ matchgroup=String end=+"+ contained
syn match lexPatTag "^<\I\i*\(,\I\i*\)*>*" contained nextgroup=lexPat,lexPatTag,lexMorePat,lexPatSep
syn match lexPatTag +^<\I\i*\(,\I\i*\)*>*\(\\\\\)*\\"+ contained nextgroup=lexPat,lexPatTag,lexMorePat,lexPatSep
syn region lexPatComment start="^\s*/\*" end="\*/" skipnl contained contains=cTodo nextgroup=lexPatComment,lexPat,lexPatString,lexPatTag
syn match lexPatCodeLine ".*$" contained contains=ALLBUT,@lexListGroup
syn match lexMorePat "\s*|\s*$" skipnl contained nextgroup=lexPat,lexPatString,lexPatTag,lexPatComment
syn match lexPatSep "\s\+" contained nextgroup=lexMorePat,lexPatCode,lexPatCodeLine
syn match lexSlashQuote +\(\\\\\)*\\"+ contained
syn region lexPatCode matchgroup=Delimiter start="{" matchgroup=Delimiter end="}" skipnl contained contains=ALLBUT,@lexListPatCodeGroup
syn keyword ClexFunctions BEGIN input unput woutput yyleng yylook yytext
syn keyword ClexFunctions ECHO output winput wunput yyless yymore yywrap
" <c.vim> includes several ALLBUTs; these have to be treated so as to exclude lex* groups
syn cluster cParenGroup add=lex.*
syn cluster cDefineGroup add=lex.*
syn cluster cPreProcGroup add=lex.*
syn cluster cMultiGroup add=lex.*
" Synchronization
syn sync clear
syn sync minlines=300
syn sync match lexSyncPat grouphere lexPatBlock "^%[a-zA-Z]"
syn sync match lexSyncPat groupthere lexPatBlock "^<$"
syn sync match lexSyncPat groupthere lexPatBlock "^%%$"
if !exists("did_lex_syntax_inits")
let did_lex_synax_inits = 1
hi link lexSlashQuote lexPat
hi link lexBrace lexPat
hi link ClexFunctions Function
hi link lexAbbrv SpecialChar
hi link lexAbbrvRegExp Macro
hi link lexMorePat SpecialChar
hi link lexPat Function
hi link lexPatComment Comment
hi link lexPatString Function
hi link lexPatTag Special
hi link lexSep Delimiter
endif
let b:current_syntax = "lex"
" vim:ts=10
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