MutableArray/STArray fixage.
-- !!! multi-dimensional arrays
module Main ( main ) where
-- !!! multi-dimensional arrays
module Main ( main ) where
-type TwoD s = MutableArray s Int (MutableArray s Int Int)
+type TwoD s = STArray s Int (STArray s Int Int)
setup :: ST s (TwoD s)
setup = let isz = 10
setup :: ST s (TwoD s)
setup = let isz = 10
do
-- gives : undefined reference to `IOBase_error_closure'
-- x <- newArray (0, omax) (error "uninitialised")
do
-- gives : undefined reference to `IOBase_error_closure'
-- x <- newArray (0, omax) (error "uninitialised")
- dmy <- newArray (0, imax) 0
- x <- newArray (0, omax) dmy
- as <- (sequence . replicate osz) (newArray (0, imax) 6)
- mapM_ (\(i,v) -> writeArray x i v) (zip [0..omax] as)
+ dmy <- newSTArray (0, imax) 0
+ x <- newSTArray (0, omax) dmy
+ as <- (sequence . replicate osz) (newSTArray (0, imax) 6)
+ mapM_ (\(i,v) -> writeSTArray x i v) (zip [0..omax] as)
import PrelBase
import ST
import IOExts
import PrelBase
import ST
import IOExts
import MutableArray
import ByteArray
import Addr
import MutableArray
import ByteArray
import Addr
- newArray (1, size) (3 % 5) >>= \ arr# ->
+ newSTArray (1, size) (3 % 5) >>= \ arr# ->
-- don't fill in the whole thing
fill_in arr# 1 400 >>
-- don't fill in the whole thing
fill_in arr# 1 400 >>
- fill_in :: MutableArray s Int (Ratio Int) -> Int -> Int -> ST s ()
+ fill_in :: STArray s Int (Ratio Int) -> Int -> Int -> ST s ()
fill_in arr_in# first last
= if (first > last)
then return ()
fill_in arr_in# first last
= if (first > last)
then return ()
- else writeArray arr_in# first (fromInt (first * first)) >>
+ else writeSTArray arr_in# first (fromInt (first * first)) >>
fill_in arr_in# (first + 1) last
lookup_range :: Array Int (Ratio Int) -> Int -> Int -> [Ratio Int]
fill_in arr_in# (first + 1) last
lookup_range :: Array Int (Ratio Int) -> Int -> Int -> [Ratio Int]