    {- This module was generated from data in the Kate syntax highlighting file awk.xml, version 0.90,
       by   -}

    module Text.Highlighting.Kate.Syntax.Awk ( highlight, parseExpression, syntaxName, syntaxExtensions ) where
    import Text.Highlighting.Kate.Definitions
    import Text.Highlighting.Kate.Common
    import qualified Text.Highlighting.Kate.Syntax.Alert
    import Text.ParserCombinators.Parsec
    import Data.List (nub)
    import Data.Map (fromList)
    import Data.Maybe (fromMaybe)

    -- | Full name of language.
    syntaxName :: String
    syntaxName = "AWK"

    -- | Filename extensions for this language.
    syntaxExtensions :: String
    syntaxExtensions = "*.awk"

    -- | Highlight source code using this syntax definition.
    highlight :: String -> Either String [SourceLine]
    highlight input =
      case runParser parseSource startingState "source" input of
        Left err     -> Left $ show err
        Right result -> Right result

    -- | Parse an expression using appropriate local context.
    parseExpression :: GenParser Char SyntaxState LabeledSource
    parseExpression = do
      st <- getState
      let oldLang = synStLanguage st
      setState $ st { synStLanguage = "AWK" }
      context <- currentContext <|> (pushContext "Base" >> currentContext)
      result <- parseRules context
      updateState $ \st -> st { synStLanguage = oldLang }
      return result

    parseSource = do
      lineContents <- lookAhead wholeLine
      updateState $ \st -> st { synStCurrentLine = lineContents }
      result <- manyTill parseSourceLine eof
      return $ map normalizeHighlighting result

    startingState = SyntaxState {synStContexts = fromList [("AWK",["Base"])], synStLanguage = "AWK", synStCurrentLine = "", synStCharsParsedInLine = 0, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}

    parseSourceLine = manyTill parseExpressionInternal pEndLine

    pEndLine = do
      newline <|> (eof >> return '\n')
      context <- currentContext
      case context of
        "Base" -> return ()
        "String" -> return ()
        "Comment" -> (popContext >> return ())
        _ -> return ()
      lineContents <- lookAhead wholeLine
      updateState $ \st -> st { synStCurrentLine = lineContents, synStCharsParsedInLine = 0 }

    withAttribute attr txt = do
      if null txt
         then fail "Parser matched no text"
         else return ()
      let style = fromMaybe "" $ lookup attr styles
      st <- getState
      let oldCharsParsed = synStCharsParsedInLine st
      updateState $ \st -> st { synStCharsParsedInLine = oldCharsParsed + length txt }
      return (nub [style, attr], txt)

    styles = [("Normal","Normal"),("Keyword","Keyword"),("Builtin","DataType"),("Function","Function"),("Decimal","DecVal"),("Float","Float"),("String","String"),("Comment","Comment"),("Pattern","String"),("Field","Others")]

    parseExpressionInternal = do
      context <- currentContext
      parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))

    defaultAttributes = [("Base","Normal"),("String","String"),("Comment","Comment")]

    parseRules "Base" =
      do (attr, result) <- (((pRegExpr (compileRegex "\\b(BEGIN|END)\\b") >>= withAttribute "Pattern"))
                            <|>
                            ((pRegExpr (compileRegex "/([^\\/[]|\\\\.|\\[\\]?(\\[[^]]+\\]|.)+\\])+/") >>= withAttribute "Pattern"))
                            <|>
                            ((pDetectChar False '{' >>= withAttribute "Keyword"))
                            <|>
                            ((pDetectChar False '}' >>= withAttribute "Keyword"))
                            <|>
                            ((pDetectChar False '#' >>= withAttribute "Comment") >>~ pushContext "Comment")
                            <|>
                            ((pDetectChar False '"' >>= withAttribute "String") >>~ pushContext "String")
                            <|>
                            ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["if","else","while","do","for","in","continue","break","print","printf","getline","function","return","next","exit"] >>= withAttribute "Keyword"))
                            <|>
                            ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["ARGC","ARGV","CONVFMT","ENVIRON","FILENAME","FNR","FS","NF","NR","OFMT","OFS","ORS","RS","RSTART","RLENGTH","SUBSEP"] >>= withAttribute "Builtin"))
                            <|>
                            ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["gsub","gensub","index","length","match","split","sprintf","sub","substr","tolower","toupper","atan2","cos","exp","int","log","rand","sin","sqrt","srand","close","fflush","system"] >>= withAttribute "Function"))
                            <|>
                            ((pFloat >>= withAttribute "Float"))
                            <|>
                            ((pInt >>= withAttribute "Decimal"))
                            <|>
                            ((pRegExpr (compileRegex "\\$[A-Za-z0-9_]+") >>= withAttribute "Field")))
         return (attr, result)

    parseRules "String" =
      do (attr, result) <- (((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ()))
                            <|>
                            ((pHlCStringChar >>= withAttribute "String")))
         return (attr, result)

    parseRules "Comment" =
      do (attr, result) <- ((Text.Highlighting.Kate.Syntax.Alert.parseExpression >>= ((withAttribute "") . snd)))
         return (attr, result)

    parseRules x = fail $ "Unknown context" ++ x