{-# LINE 1 "templates/wrappers.hs" #-}
{-# LINE 1 "templates/wrappers.hs" #-}
{-# LINE 1 "<built-in>" #-}
{-# LINE 1 "<command-line>" #-}
{-# LINE 1 "templates/wrappers.hs" #-}
-- -----------------------------------------------------------------------------
-- Alex wrapper code.
--
-- This code is in the PUBLIC DOMAIN; you may copy it freely and use
-- it for any purpose whatsoever.

{-# LINE 18 "templates/wrappers.hs" #-}

-- -----------------------------------------------------------------------------
-- The input type


type AlexInput = (AlexPosn,     -- current position,
                  Char,         -- previous char
                  String)       -- current input string

alexInputPrevChar :: AlexInput -> Char
alexInputPrevChar (p,c,s) = c

alexGetChar :: AlexInput -> Maybe (Char,AlexInput)
alexGetChar (p,c,[]) = Nothing
alexGetChar (p,_,(c:s))  = let p' = alexMove p c in p' `seq`
                                Just (c, (p', c, s))


{-# LINE 51 "templates/wrappers.hs" #-}

-- -----------------------------------------------------------------------------
-- Token positions

-- `Posn' records the location of a token in the input text.  It has three
-- fields: the address (number of chacaters preceding the token), line number
-- and column of a token within the file. `start_pos' gives the position of the
-- start of the file and `eof_pos' a standard encoding for the end of file.
-- `move_pos' calculates the new position after traversing a given character,
-- assuming the usual eight character tab stops.


data AlexPosn = AlexPn !Int !Int !Int
        deriving (Eq,Show)

alexStartPos :: AlexPosn
alexStartPos = AlexPn 0 1 1

alexMove :: AlexPosn -> Char -> AlexPosn
alexMove (AlexPn a l c) '\t' = AlexPn (a+1)  l     (((c+7) `div` 8)*8+1)
alexMove (AlexPn a l c) '\n' = AlexPn (a+1) (l+1)   1
alexMove (AlexPn a l c) _    = AlexPn (a+1)  l     (c+1)


-- -----------------------------------------------------------------------------
-- Default monad

{-# LINE 162 "templates/wrappers.hs" #-}


-- -----------------------------------------------------------------------------
-- Monad (with ByteString input)

{-# LINE 251 "templates/wrappers.hs" #-}


-- -----------------------------------------------------------------------------
-- Basic wrapper

{-# LINE 273 "templates/wrappers.hs" #-}


-- -----------------------------------------------------------------------------
-- Basic wrapper, ByteString version

{-# LINE 297 "templates/wrappers.hs" #-}

{-# LINE 322 "templates/wrappers.hs" #-}


-- -----------------------------------------------------------------------------
-- Posn wrapper

-- Adds text positions to the basic model.


--alexScanTokens :: String -> [token]
alexScanTokens str = go (alexStartPos,'\n',str)
  where go inp@(pos,_,str) =
          case alexScan inp 0 of
                AlexEOF -> []
                AlexError ((AlexPn _ line column),_,_) -> error $ "lexical error at " ++ (show line) ++ " line, " ++ (show column) ++ " column"
                AlexSkip  inp' len     -> go inp'
                AlexToken inp' len act -> act pos (take len str) : go inp'



-- -----------------------------------------------------------------------------
-- Posn wrapper, ByteString version

{-# LINE 354 "templates/wrappers.hs" #-}


-- -----------------------------------------------------------------------------
-- GScan wrapper

-- For compatibility with previous versions of Alex, and because we can.

