{-# LANGUAGE MagicHash #-}
{-# LANGUAGE UnboxedTuples #-}
module Compat
( unsafeShrinkAndFreeze
, unsafeShrinkAndFreeze#
) where
import Data.Primitive (SmallArray (..), SmallMutableArray (..))
import GHC.Exts (Int (I#), Int#, SmallArray#, SmallMutableArray#, State#)
import GHC.ST (ST (ST))
import qualified GHC.Exts as Exts
unsafeShrinkAndFreeze ::
SmallMutableArray s a ->
Int ->
ST s (SmallArray a)
{-# INLINE unsafeShrinkAndFreeze #-}
unsafeShrinkAndFreeze :: forall s a. SmallMutableArray s a -> Int -> ST s (SmallArray a)
unsafeShrinkAndFreeze (SmallMutableArray SmallMutableArray# s a
x) (I# Int#
n) =
STRep s (SmallArray a) -> ST s (SmallArray a)
forall s a. STRep s a -> ST s a
ST
( \State# s
s0 -> case SmallMutableArray# s a -> Int# -> State# s -> State# s
forall d a. SmallMutableArray# d a -> Int# -> State# d -> State# d
Exts.shrinkSmallMutableArray# SmallMutableArray# s a
x Int#
n State# s
s0 of
State# s
s1 -> case SmallMutableArray# s a -> State# s -> (# State# s, SmallArray# a #)
forall d a.
SmallMutableArray# d a -> State# d -> (# State# d, SmallArray# a #)
Exts.unsafeFreezeSmallArray# SmallMutableArray# s a
x State# s
s1 of
(# State# s
s2, SmallArray# a
r #) -> (# State# s
s2, SmallArray# a -> SmallArray a
forall a. SmallArray# a -> SmallArray a
SmallArray SmallArray# a
r #)
)
unsafeShrinkAndFreeze# ::
SmallMutableArray# s a ->
Int# ->
State# s ->
(# State# s, SmallArray# a #)
{-# INLINE unsafeShrinkAndFreeze# #-}
unsafeShrinkAndFreeze# :: forall s a.
SmallMutableArray# s a
-> Int# -> State# s -> (# State# s, SmallArray# a #)
unsafeShrinkAndFreeze# SmallMutableArray# s a
x Int#
n State# s
s0 =
case SmallMutableArray# s a -> Int# -> State# s -> State# s
forall d a. SmallMutableArray# d a -> Int# -> State# d -> State# d
Exts.shrinkSmallMutableArray# SmallMutableArray# s a
x Int#
n State# s
s0 of
State# s
s1 -> SmallMutableArray# s a -> State# s -> (# State# s, SmallArray# a #)
forall d a.
SmallMutableArray# d a -> State# d -> (# State# d, SmallArray# a #)
Exts.unsafeFreezeSmallArray# SmallMutableArray# s a
x State# s
s1