Safe Haskell	None
Language	GHC2021

Data.Dir

Synopsis

data Dir
- = L
- | R
- | U
- | D
enumerateDir :: [Dir]
opposite :: Dir -> Dir
dirToChar :: Dir -> Char
charToDir :: Char -> Dir
dirMove :: (Int, Int) -> Dir -> (Int, Int)
dir4Moves :: (Int, Int) -> [(Int, Int)]
dirDiff :: Dir -> (Int, Int)
moveToDir :: (Int, Int) -> (Int, Int) -> Dir

Documentation

data Dir Source #

Constructors

L
R
U
D

Instances

Instances details

Bounded Dir Source #
Instance details Defined in Data.Dir Methods minBound :: Dir # maxBound :: Dir #
Enum Dir Source #
Instance details Defined in Data.Dir Methods succ :: Dir -> Dir # pred :: Dir -> Dir # toEnum :: Int -> Dir # fromEnum :: Dir -> Int # enumFrom :: Dir -> [Dir] # enumFromThen :: Dir -> Dir -> [Dir] # enumFromTo :: Dir -> Dir -> [Dir] # enumFromThenTo :: Dir -> Dir -> Dir -> [Dir] #
Read Dir Source #
Instance details Defined in Data.Dir Methods readsPrec :: Int -> ReadS Dir # readList :: ReadS [Dir] # readPrec :: ReadPrec Dir # readListPrec :: ReadPrec [Dir] #
Show Dir Source #
Instance details Defined in Data.Dir Methods showsPrec :: Int -> Dir -> ShowS # show :: Dir -> String # showList :: [Dir] -> ShowS #
Eq Dir Source #
Instance details Defined in Data.Dir Methods (==) :: Dir -> Dir -> Bool # (/=) :: Dir -> Dir -> Bool #
Ord Dir Source #
Instance details Defined in Data.Dir Methods compare :: Dir -> Dir -> Ordering # (<) :: Dir -> Dir -> Bool # (<=) :: Dir -> Dir -> Bool # (>) :: Dir -> Dir -> Bool # (>=) :: Dir -> Dir -> Bool # max :: Dir -> Dir -> Dir # min :: Dir -> Dir -> Dir #
Unbox Dir Source #
Instance details Defined in Data.Dir
Vector Vector Dir Source #
Instance details Defined in Data.Dir Methods basicUnsafeFreeze :: Mutable Vector s Dir -> ST s (Vector Dir) basicUnsafeThaw :: Vector Dir -> ST s (Mutable Vector s Dir) basicLength :: Vector Dir -> Int basicUnsafeSlice :: Int -> Int -> Vector Dir -> Vector Dir basicUnsafeIndexM :: Vector Dir -> Int -> Box Dir basicUnsafeCopy :: Mutable Vector s Dir -> Vector Dir -> ST s () elemseq :: Vector Dir -> Dir -> b -> b
MVector MVector Dir Source #
Instance details Defined in Data.Dir Methods basicLength :: MVector s Dir -> Int basicUnsafeSlice :: Int -> Int -> MVector s Dir -> MVector s Dir basicOverlaps :: MVector s Dir -> MVector s Dir -> Bool basicUnsafeNew :: Int -> ST s (MVector s Dir) basicInitialize :: MVector s Dir -> ST s () basicUnsafeReplicate :: Int -> Dir -> ST s (MVector s Dir) basicUnsafeRead :: MVector s Dir -> Int -> ST s Dir basicUnsafeWrite :: MVector s Dir -> Int -> Dir -> ST s () basicClear :: MVector s Dir -> ST s () basicSet :: MVector s Dir -> Dir -> ST s () basicUnsafeCopy :: MVector s Dir -> MVector s Dir -> ST s () basicUnsafeMove :: MVector s Dir -> MVector s Dir -> ST s () basicUnsafeGrow :: MVector s Dir -> Int -> ST s (MVector s Dir)
IsoUnbox Dir Word8 Source #
Instance details Defined in Data.Dir Methods toURepr :: Dir -> Word8 fromURepr :: Word8 -> Dir
newtype Vector Dir Source #
Instance details Defined in Data.Dir newtype Vector Dir = V_Dir (Vector Word8)
newtype MVector s Dir Source #
Instance details Defined in Data.Dir newtype MVector s Dir = MV_Dir (MVector s Word8)

enumerateDir :: [Dir] Source #

>>> enumerateDir
[L,R,U,D]

opposite :: Dir -> Dir Source #

>>> opposite L
R
>>> opposite R
L
>>> opposite U
D
>>> opposite D
U

dirToChar :: Dir -> Char Source #

charToDir :: Char -> Dir Source #

dirMove :: (Int, Int) -> Dir -> (Int, Int) Source #

>>> dirMove (2, 3) U
(1,3)
>>> dirMove (0, 0) U
(-1,0)
>>> dirMove (0, 0) R
(0,1)
>>> map (dirMove (2, 3)) enumerateDir
[(2,2),(2,4),(1,3),(3,3)]

dir4Moves :: (Int, Int) -> [(Int, Int)] Source #

>>> dir4Moves (2, 3)
[(2,2),(2,4),(1,3),(3,3)]
>>> dir4Moves (0, 1)
[(0,0),(0,2),(-1,1),(1,1)]

dirDiff :: Dir -> (Int, Int) Source #

>>> dirDiff U
(-1,0)
>>> dirDiff R
(0,1)

moveToDir :: (Int, Int) -> (Int, Int) -> Dir Source #

>>> moveToDir (0, 1) (0, 2)
R
>>> moveToDir (1, 2) (0, 2)
U
>>> moveToDir (0, 0) (1, 1)
*** Exception: invalid move: (1,1)