-- Must specify one of index, unsafeIndex
index b i | inRange b i = unsafeIndex b i
| otherwise = error "Error in array index"
+ -- ToDo: raise (ArrayException IndexOutOfRange)
unsafeIndex b i = index b i
\end{code}
arrEleBottom :: a
arrEleBottom = error "(Array.!): undefined array element"
-
+-- ToDo: arrEleBottom = throw (ArrayException (UndefinedElement "Array.!"))
-----------------------------------------------------------------------
-- These also go better with magic: (//), accum, accumArray
% -----------------------------------------------------------------------------
-% $Id: PrelException.lhs,v 1.8 1999/07/14 08:33:38 simonmar Exp $
+% $Id: PrelException.lhs,v 1.9 1999/11/11 15:18:00 simonmar Exp $
%
% (c) The GRAP/AQUA Project, Glasgow University, 1998
%
| AssertionFailed String -- Assertions
| DynException Dynamic -- Dynamic exceptions
| AsyncException AsyncException -- Externally generated errors
+ | ArrayException ArrayException -- Array-related exceptions
| NonTermination
data ArithException
| ThreadKilled
deriving (Eq, Ord)
+data ArrayException
+ = IndexOutOfBounds String
+ | UndefinedElement String
+ deriving (Eq, Ord)
+
stackOverflow, heapOverflow :: Exception -- for the RTS
stackOverflow = AsyncException StackOverflow
heapOverflow = AsyncException HeapOverflow
showsPrec _ HeapOverflow = showString "heap overflow"
showsPrec _ ThreadKilled = showString "thread killed"
+instance Show ArrayException where
+ showsPrec _ (IndexOutOfBounds s) = showString "array index out of bounds: "
+ . showString s
+ showsPrec _ (UndefinedElement s) = showString "undefined array element: "
+ . showString s
+
instance Show Exception where
showsPrec _ (IOException err) = shows err
showsPrec _ (ArithException err) = shows err
eqForeignObj mp1 mp2
= unsafePerformIO (primEqForeignObj mp1 mp2) /= (0::Int)
-foreign import "eqForeignObj" primEqForeignObj :: ForeignObj -> ForeignObj -> IO Int
+foreign import "eqForeignObj" unsafe primEqForeignObj :: ForeignObj -> ForeignObj -> IO Int
instance Eq ForeignObj where
p == q = eqForeignObj p q
timesIntegerzh
gcdIntegerzh
quotRemIntegerzh
+ divModIntegerzh
integer2Intzh
integer2Wordzh
int2Integerzh
n `div` d = q where (q,_) = divMod n d
n `mod` d = r where (_,r) = divMod n d
- divMod n d = case (quotRem n d) of { qr@(q,r) ->
- if signum r == negate (signum d) then (q - 1, r+d) else qr }
- -- Case-ified by WDP 94/10
+ divMod (S# i) (S# j)
+ = case divMod (I# i) (I# j) of ( I# i, I# j ) -> ( S# i, S# j)
+ divMod i1@(J# _ _) i2@(S# _) = divMod i1 (toBig i2)
+ divMod i1@(S# _) i2@(J# _ _) = divMod (toBig i1) i2
+ divMod (J# s1 d1) (J# s2 d2)
+ = case (divModInteger# s1 d1 s2 d2) of
+ (# s3, d3, s4, d4 #)
+ -> (J# s3 d3, J# s4 d4)
------------------------------------------------------------------------
instance Enum Integer where