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LexerMin.hs
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{-# OPTIONS_GHC -fno-warn-unused-binds -fno-warn-missing-signatures #-}
{-# LANGUAGE CPP #-}
{-# LINE 1 "LexerMin.x" #-}
-- Définition du nom du module et des exports.
module LexerMin (lexer, Name, Op, Token(..)) where
#if __GLASGOW_HASKELL__ >= 603
#include "ghcconfig.h"
#elif defined(__GLASGOW_HASKELL__)
#include "config.h"
#endif
#if __GLASGOW_HASKELL__ >= 503
import Data.Array
import Data.Array.Base (unsafeAt)
#else
import Array
#endif
{-# 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.
import Data.Word (Word8)
import Data.Char (ord)
import qualified Data.Bits
-- | Encode a Haskell String to a list of Word8 values, in UTF8 format.
utf8Encode :: Char -> [Word8]
utf8Encode = map fromIntegral . go . ord
where
go oc
| oc <= 0x7f = [oc]
| oc <= 0x7ff = [ 0xc0 + (oc `Data.Bits.shiftR` 6)
, 0x80 + oc Data.Bits..&. 0x3f
]
| oc <= 0xffff = [ 0xe0 + (oc `Data.Bits.shiftR` 12)
, 0x80 + ((oc `Data.Bits.shiftR` 6) Data.Bits..&. 0x3f)
, 0x80 + oc Data.Bits..&. 0x3f
]
| otherwise = [ 0xf0 + (oc `Data.Bits.shiftR` 18)
, 0x80 + ((oc `Data.Bits.shiftR` 12) Data.Bits..&. 0x3f)
, 0x80 + ((oc `Data.Bits.shiftR` 6) Data.Bits..&. 0x3f)
, 0x80 + oc Data.Bits..&. 0x3f
]
type Byte = Word8
-- -----------------------------------------------------------------------------
-- The input type
-- -----------------------------------------------------------------------------
-- 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.
-- -----------------------------------------------------------------------------
-- Default monad
-- -----------------------------------------------------------------------------
-- Monad (with ByteString input)
-- -----------------------------------------------------------------------------
-- Basic wrapper
type AlexInput = (Char,[Byte],String)
alexInputPrevChar :: AlexInput -> Char
alexInputPrevChar (c,_,_) = c
-- alexScanTokens :: String -> [token]
alexScanTokens str = go ('\n',[],str)
where go inp__@(_,_bs,s) =
case alexScan inp__ 0 of
AlexEOF -> []
AlexError _ -> error "lexical error"
AlexSkip inp__' _ln -> go inp__'
AlexToken inp__' len act -> act (take len s) : go inp__'
alexGetByte :: AlexInput -> Maybe (Byte,AlexInput)
alexGetByte (c,(b:bs),s) = Just (b,(c,bs,s))
alexGetByte (_,[],[]) = Nothing
alexGetByte (_,[],(c:s)) = case utf8Encode c of
(b:bs) -> Just (b, (c, bs, s))
[] -> Nothing
-- -----------------------------------------------------------------------------
-- Basic wrapper, ByteString version
-- -----------------------------------------------------------------------------
-- Posn wrapper
-- Adds text positions to the basic model.
-- -----------------------------------------------------------------------------
-- Posn wrapper, ByteString version
-- -----------------------------------------------------------------------------
-- GScan wrapper
-- For compatibility with previous versions of Alex, and because we can.
alex_tab_size :: Int
alex_tab_size = 8
alex_base :: Array Int Int
alex_base = listArray (0 :: Int, 41)
[ -8
, -76
, 0
, 37
, 0
, 165
, 293
, 549
, 485
, 0
, -2
, 693
, 768
, 843
, 918
, 993
, 1068
, 0
, 0
, 0
, 1074
, 0
, -39
, -31
, -48
, 0
, -47
, 0
, 1143
, 1282
, 1357
, 1432
, 1507
, 1582
, 1657
, 1732
, 1807
, 1882
, 1957
, 2032
, 2107
, 2182
]
alex_table :: Array Int Int
alex_table = listArray (0 :: Int, 2437)
[ 0
, 10
, 10
, 10
, 10
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, 20
, 10
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