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|
{-# LANGUAGE Rank2Types, FlexibleContexts #-}
-- |
-- Module : Data.Vector.Generic.New
-- Copyright : (c) Roman Leshchinskiy 2008-2010
-- License : BSD-style
--
-- Maintainer : Roman Leshchinskiy <rl@cse.unsw.edu.au>
-- Stability : experimental
-- Portability : non-portable
--
-- Purely functional interface to initialisation of mutable vectors
--
module Data.Vector.Generic.New (
New(..), create, run, runPrim, apply, modify, modifyWithStream,
unstream, transform, unstreamR, transformR,
slice, init, tail, take, drop,
unsafeSlice, unsafeInit, unsafeTail
) where
import qualified Data.Vector.Generic.Mutable as MVector
import Data.Vector.Generic.Mutable ( MVector )
import Data.Vector.Generic.Base ( Vector, Mutable )
import Data.Vector.Fusion.Stream ( Stream, MStream )
import qualified Data.Vector.Fusion.Stream as Stream
import Control.Monad.Primitive
import Control.Monad.ST ( ST )
import Control.Monad ( liftM )
import Prelude hiding ( init, tail, take, drop, reverse, map, filter )
#include "vector.h"
data New v a = New (forall s. ST s (Mutable v s a))
create :: (forall s. ST s (Mutable v s a)) -> New v a
{-# INLINE create #-}
create p = New p
run :: New v a -> ST s (Mutable v s a)
{-# INLINE run #-}
run (New p) = p
runPrim :: PrimMonad m => New v a -> m (Mutable v (PrimState m) a)
{-# INLINE runPrim #-}
runPrim (New p) = primToPrim p
apply :: (forall s. Mutable v s a -> Mutable v s a) -> New v a -> New v a
{-# INLINE apply #-}
apply f (New p) = New (liftM f p)
modify :: (forall s. Mutable v s a -> ST s ()) -> New v a -> New v a
{-# INLINE modify #-}
modify f (New p) = New (do { v <- p; f v; return v })
modifyWithStream :: (forall s. Mutable v s a -> Stream b -> ST s ())
-> New v a -> Stream b -> New v a
{-# INLINE_STREAM modifyWithStream #-}
modifyWithStream f (New p) s = s `seq` New (do { v <- p; f v s; return v })
unstream :: Vector v a => Stream a -> New v a
{-# INLINE_STREAM unstream #-}
unstream s = s `seq` New (MVector.unstream s)
transform :: Vector v a =>
(forall m. Monad m => MStream m a -> MStream m a) -> New v a -> New v a
{-# INLINE_STREAM transform #-}
transform f (New p) = New (MVector.transform f =<< p)
{-# RULES
"transform/transform [New]"
forall (f :: forall m. Monad m => MStream m a -> MStream m a)
(g :: forall m. Monad m => MStream m a -> MStream m a)
p .
transform f (transform g p) = transform (f . g) p
"transform/unstream [New]"
forall (f :: forall m. Monad m => MStream m a -> MStream m a)
s.
transform f (unstream s) = unstream (f s)
#-}
unstreamR :: Vector v a => Stream a -> New v a
{-# INLINE_STREAM unstreamR #-}
unstreamR s = s `seq` New (MVector.unstreamR s)
transformR :: Vector v a =>
(forall m. Monad m => MStream m a -> MStream m a) -> New v a -> New v a
{-# INLINE_STREAM transformR #-}
transformR f (New p) = New (MVector.transformR f =<< p)
{-# RULES
"transformR/transformR [New]"
forall (f :: forall m. Monad m => MStream m a -> MStream m a)
(g :: forall m. Monad m => MStream m a -> MStream m a)
p .
transformR f (transformR g p) = transformR (f . g) p
"transformR/unstreamR [New]"
forall (f :: forall m. Monad m => MStream m a -> MStream m a)
s.
transformR f (unstreamR s) = unstreamR (f s)
#-}
slice :: Vector v a => Int -> Int -> New v a -> New v a
{-# INLINE_STREAM slice #-}
slice i n m = apply (MVector.slice i n) m
init :: Vector v a => New v a -> New v a
{-# INLINE_STREAM init #-}
init m = apply MVector.init m
tail :: Vector v a => New v a -> New v a
{-# INLINE_STREAM tail #-}
tail m = apply MVector.tail m
take :: Vector v a => Int -> New v a -> New v a
{-# INLINE_STREAM take #-}
take n m = apply (MVector.take n) m
drop :: Vector v a => Int -> New v a -> New v a
{-# INLINE_STREAM drop #-}
drop n m = apply (MVector.drop n) m
unsafeSlice :: Vector v a => Int -> Int -> New v a -> New v a
{-# INLINE_STREAM unsafeSlice #-}
unsafeSlice i n m = apply (MVector.unsafeSlice i n) m
unsafeInit :: Vector v a => New v a -> New v a
{-# INLINE_STREAM unsafeInit #-}
unsafeInit m = apply MVector.unsafeInit m
unsafeTail :: Vector v a => New v a -> New v a
{-# INLINE_STREAM unsafeTail #-}
unsafeTail m = apply MVector.unsafeTail m
{-# RULES
"slice/unstream [New]" forall i n s.
slice i n (unstream s) = unstream (Stream.slice i n s)
"init/unstream [New]" forall s.
init (unstream s) = unstream (Stream.init s)
"tail/unstream [New]" forall s.
tail (unstream s) = unstream (Stream.tail s)
"take/unstream [New]" forall n s.
take n (unstream s) = unstream (Stream.take n s)
"drop/unstream [New]" forall n s.
drop n (unstream s) = unstream (Stream.drop n s)
"unsafeSlice/unstream [New]" forall i n s.
unsafeSlice i n (unstream s) = unstream (Stream.slice i n s)
"unsafeInit/unstream [New]" forall s.
unsafeInit (unstream s) = unstream (Stream.init s)
"unsafeTail/unstream [New]" forall s.
unsafeTail (unstream s) = unstream (Stream.tail s)
#-}
|
