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{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE GADTs #-}
import Data.Char (toLower)
import System.IO (IOMode(ReadMode, ReadWriteMode), openFile, stdout, hIsEOF, hGetChar, hPutChar, Handle, isEOF, BufferMode(NoBuffering), hSetBuffering, stdin )
import Control.Monad (when)
import Control.Monad.State
import Control.Concurrent (threadDelay)
import Control.Monad.Trans.Maybe
import System.Environment (getArgs)
-- Zadanie 1
int :: (String -> a) -> String -> Integer -> a
int f s n = f (s ++ show n)
str :: (String -> a) -> String -> String -> a
str f s1 s2 = f (s1 ++ s2)
lit :: String -> (String -> a) -> String -> a
lit s f s2 = f (s2 ++ s)
(^^) :: (b -> c) -> (a -> b) -> a -> c
(^^) f g x = f (g x)
sprintf :: ((a -> a) -> [Char] -> t) -> t
sprintf f = f id ""
-- Zadanie 2
data Format a b where
Lit :: String -> Format a a
Int :: Format a (Int -> a)
Str :: Format a (String -> a)
(:^:) :: Format c b -> Format a c -> Format a b
ksprintf :: Format a b -> (String -> a) -> String -> b
ksprintf (Lit s1) cont = \s2 -> cont (s2 ++ s1)
ksprintf Int cont = \s n -> cont (s ++ show n)
ksprintf Str cont = \s1 s2 -> cont (s1 ++ s2)
ksprintf (a :^: b) cont = ksprintf a (ksprintf b cont)
kprintf :: Format a b -> (IO () -> a) -> b
kprintf (Lit s1) cont = cont (putStr s1)
kprintf Int cont = \n -> cont (putStr (show n))
kprintf Str cont = \s -> cont (putStr s)
kprintf (a :^: b) cont = kprintf a (\s1 -> kprintf b (\s2 -> cont (s1 >> s2)))
printf :: Format (IO ()) b -> b
printf frmt = kprintf frmt id
sprintf2 :: Format String b -> b
sprintf2 frmt = ksprintf frmt id ""
-- Zadanie 3
echoLower :: IO ()
echoLower = do x <- getChar
putChar (toLower x)
echoLower
-- Zadanie 4
data StreamTrans i o a
= Return a
| ReadS (Maybe i -> StreamTrans i o a)
| WriteS o (StreamTrans i o a)
myToLower :: StreamTrans Char Char ()
myToLower = ReadS f where
f (Just i) = WriteS (toLower i) myToLower
f Nothing = Return ()
runStreams :: StreamTrans Char Char a -> IO a
runStreams (Return a) = return a
runStreams (ReadS f) = do
eof <- isEOF
if eof
then runStreams (f Nothing)
else do
c <- getChar
runStreams (f (Just c))
runStreams (WriteS out str) = do
putChar out
runStreams str
-- Zadanie 5
listTrans :: StreamTrans i o a -> [i] -> ([o], a)
listTrans (Return a) xs = ([], a)
listTrans (ReadS f) [] = listTrans (f Nothing) []
listTrans (ReadS f) (x:xs) = listTrans (f (Just x)) xs
listTrans (WriteS out str) xs =
let (ys, a) = listTrans str xs
in (out : ys, a)
-- Zadanie 6
runCycle :: StreamTrans a a b -> b
runCycle (Return b) = b
runCycle (ReadS f) = runCycle (f Nothing)
runCycle (WriteS out (ReadS f)) = runCycle (f (Just out))
runCycle (WriteS _ str) = runCycle str
-- Zadanie 7
(|>|) :: StreamTrans i m a -> StreamTrans m o b -> StreamTrans i o b
_ |>| Return b = Return b
ReadS f |>| stream = ReadS (\input -> (f input) |>| stream)
WriteS out stream |>| ReadS f = stream |>| f (Just out)
stream1 |>| WriteS out stream2 = WriteS out (stream1 |>| stream2)
stream |>| ReadS f = stream |>| f Nothing
-- Zadanie 8
catchOutput :: StreamTrans i o a -> StreamTrans i b (a, [o])
catchOutput = aux []
where
aux xs (Return a) = Return (a, xs)
aux xs (ReadS f) = ReadS (\i -> aux xs (f i))
aux xs (WriteS out stream) = aux (out : xs) stream
-- Zadanie 9
data BF
= MoveR -- >
| MoveL -- <
| Inc -- +
| Dec -- -
| Output -- .
| Input -- ,
| While [BF] -- [ ]
deriving Show
brainfuckParser :: StreamTrans Char BF Bool
brainfuckParser = ReadS $ \x -> case x of
Nothing -> Return False
Just '>' -> WriteS MoveR brainfuckParser
Just '<' -> WriteS MoveL brainfuckParser
Just '+' -> WriteS Inc brainfuckParser
Just '-' -> WriteS Dec brainfuckParser
Just '.' -> WriteS Output brainfuckParser
Just ',' -> WriteS Input brainfuckParser
Just '[' -> do (b, loop) <- catchOutput brainfuckParser
if b then WriteS (While loop) brainfuckParser
else Return False
Just ']' -> Return True
Just _ -> brainfuckParser
-- Zadanie 10
type Tape = ([Integer], [Integer])
evalBF :: Tape -> BF -> StreamTrans Char Char Tape
evalBF (xs, y : ys) MoveR = Return (y : xs, ys)
evalBF (x : xs, ys) MoveL = Return (xs, x : ys)
evalBF (xs, y : ys) Inc = Return (xs, (y + 1) : ys)
evalBF (xs, y : ys) Dec = Return (xs, (y - 1) : ys)
evalBF (xs, y : ys) Output = WriteS (coerceEnum y :: Char) (Return (xs, y : ys))
evalBF (xs, y : ys) Input = ReadS (\i -> case i of
Nothing -> Return (xs, y : ys)
Just i -> Return (xs, (coerceEnum i :: Integer) : ys))
evalBF (xs, y : ys) (While loop) =
if y == 0 then Return (xs, y : ys)
else do
loopTape <- evalBFBlock (xs, y : ys) loop
evalBF loopTape (While loop)
evalBFBlock :: Tape -> [BF] -> StreamTrans Char Char Tape
evalBFBlock tape [] = Return tape
evalBFBlock tape (bf : bfcode) =
do result <- evalBF tape bf
evalBFBlock result bfcode
coerceEnum :: (Enum a, Enum b) => a -> b
coerceEnum = toEnum . fromEnum
runBF :: [BF] -> StreamTrans Char Char ()
runBF bfcode = do evalBFBlock (repeat 0, repeat 0) bfcode
return ()
runIOStreamTransWithHandles :: Handle -> Handle -> StreamTrans Char Char a -> IO a
runIOStreamTransWithHandles inp out (Return a) = return a
runIOStreamTransWithHandles inp out (ReadS f) = do
eof <- hIsEOF inp
if eof then
runIOStreamTransWithHandles inp out $ f Nothing
else do
ch <- hGetChar inp
runIOStreamTransWithHandles inp out $ f (Just ch)
runIOStreamTransWithHandles inp out (WriteS o str) = do
hPutChar out o
runIOStreamTransWithHandles inp out str
runIOStreamTrans :: StreamTrans Char Char a -> IO a
runIOStreamTrans = runIOStreamTransWithHandles stdin stdout
instance Functor (StreamTrans i o) where
fmap f (Return a) = Return $ f a
fmap f (ReadS g) = ReadS $ fmap f . g
fmap f (WriteS o s) = WriteS o $ fmap f s
instance Applicative (StreamTrans i o) where
Return f <*> s = fmap f s
WriteS o sf <*> sa = WriteS o (sf <*> sa)
ReadS g <*> s = ReadS $ (<*> s) . g
pure = Return
instance Monad (StreamTrans i o) where
Return a >>= f = f a
ReadS g >>= f = ReadS $ (>>= f) . g
WriteS o s >>= f = WriteS o (s >>= f)
-- main = do
-- filename : _ <- getArgs
-- handle <- openFile filename ReadMode
-- (_, bfs) <- runIOStreamTransWithHandles handle handle $ catchOutput brainfuckParser
-- runIOStreamTrans $ runBF bfs
data BT a = L a | N (BT a) (BT a)
-- deriving show
tt = N (N (N (L 1) (L 2)) (L 4)) (L 3)
traverseBt :: BT a -> [a]
traverseBt (L x) = [x]
traverseBt (N tl tr) = (traverseBt tr) ++ (traverseBt tl)
witaj :: IO ()
witaj = putStr
|
