Add {-# OPTIONS_GHC -w #-} and some blurb to all compiler modules

[ghc-hetmet.git] / compiler / cmm / CmmLex.x

diff --git a/compiler/cmm/CmmLex.x b/compiler/cmm/CmmLex.x
index ee05122..d78f88a 100644 (file)
--- a/compiler/cmm/CmmLex.x
+++ b/compiler/cmm/CmmLex.x
@@ -11,6 +11,13 @@
 -----------------------------------------------------------------------------
 
 {
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
 module CmmLex (
    CmmToken(..), cmmlex,
   ) where
@@ -29,7 +36,7 @@ import Util
 --import TRACE
 }
 
-$whitechar   = [\ \t\n\r\f\v\xa0]
+$whitechar   = [\ \t\n\r\f\v\xa0] -- \xa0 is Unicode no-break space
 $white_no_nl = $whitechar # \n
 
 $ascdigit  = 0-9
@@ -46,7 +53,7 @@ $unismall  = \x04 -- Trick Alex into handling Unicode. See alexGetChar.
 $ascsmall  = [a-z \xdf-\xf6 \xf8-\xff]
 $small     = [$ascsmall $unismall \_]
 
-$namebegin = [$large $small \_ \. \$ \@]
+$namebegin = [$large $small \. \$ \@]
 $namechar  = [$namebegin $digit]
 
 @decimal     = $digit+
@@ -56,7 +63,7 @@ $namechar  = [$namebegin $digit]
 
 @floating_point = @decimal \. @decimal @exponent? | @decimal @exponent
 
-@escape      = \\ ([abfnrt\\\'\"\?] | x @hexadecimal | @octal)
+@escape      = \\ ([abfnrt\\\'\"\?] | x $hexit{1,2} | $octit{1,3})
 @strchar     = ($printable # [\"\\]) | @escape
 
 cmm :-
@@ -138,7 +145,10 @@ data CmmToken
   | CmmT_if
   | CmmT_jump
   | CmmT_foreign
+  | CmmT_never
   | CmmT_prim
+  | CmmT_return
+  | CmmT_returns
   | CmmT_import
   | CmmT_switch
   | CmmT_case
@@ -180,7 +190,7 @@ global_regN :: (Int -> GlobalReg) -> Action
 global_regN con span buf len 
   = return (L span (CmmT_GlobalReg (con (fromIntegral n))))
   where buf' = stepOn buf
-       n = parseInteger buf' (len-1) 10 octDecDigit
+       n = parseUnsignedInteger buf' (len-1) 10 octDecDigit
 
 global_reg :: GlobalReg -> Action
 global_reg r span buf len = return (L span (CmmT_GlobalReg r))
@@ -213,7 +223,10 @@ reservedWordsFM = listToUFM $
        ( "if",                 CmmT_if ),
        ( "jump",               CmmT_jump ),
        ( "foreign",            CmmT_foreign ),
+       ( "never",              CmmT_never ),
        ( "prim",               CmmT_prim ),
+       ( "return",             CmmT_return ),
+       ( "returns",            CmmT_returns ),
        ( "import",             CmmT_import ),
        ( "switch",             CmmT_switch ),
        ( "case",               CmmT_case ),
@@ -227,13 +240,13 @@ reservedWordsFM = listToUFM $
        ]
 
 tok_decimal span buf len 
-  = return (L span (CmmT_Int  $! parseInteger buf len 10 octDecDigit))
+  = return (L span (CmmT_Int  $! parseUnsignedInteger buf len 10 octDecDigit))
 
 tok_octal span buf len 
-  = return (L span (CmmT_Int  $! parseInteger (offsetBytes 1 buf) (len-1) 8 octDecDigit))
+  = return (L span (CmmT_Int  $! parseUnsignedInteger (offsetBytes 1 buf) (len-1) 8 octDecDigit))
 
 tok_hexadecimal span buf len 
-  = return (L span (CmmT_Int  $! parseInteger (offsetBytes 2 buf) (len-2) 16 hexDigit))
+  = return (L span (CmmT_Int  $! parseUnsignedInteger (offsetBytes 2 buf) (len-2) 16 hexDigit))
 
 tok_float str = CmmT_Float $! readRational str
 
@@ -245,7 +258,7 @@ tok_string str = CmmT_String (read str)
 
 setLine :: Int -> Action
 setLine code span buf len = do
-  let line = parseInteger buf len 10 octDecDigit
+  let line = parseUnsignedInteger buf len 10 octDecDigit
   setSrcLoc (mkSrcLoc (srcSpanFile span) (fromIntegral line - 1) 0)
        -- subtract one: the line number refers to the *following* line
   -- trace ("setLine "  ++ show line) $ do