{-# LANGUAGE CPP #-}
module BishBosh.Notation.PureCoordinate(
PureCoordinate(
getMove
),
origin,
regexSyntax,
encode,
showsCoordinates,
readsCoordinates,
abscissaParser,
ordinateParser,
coordinatesParser,
mkPureCoordinate,
mkPureCoordinate'
) where
import Control.Arrow((&&&), (***))
import qualified BishBosh.Attribute.Rank as Attribute.Rank
import qualified BishBosh.Cartesian.Abscissa as Cartesian.Abscissa
import qualified BishBosh.Cartesian.Coordinates as Cartesian.Coordinates
import qualified BishBosh.Cartesian.Ordinate as Cartesian.Ordinate
import qualified BishBosh.Component.Move as Component.Move
import qualified BishBosh.Data.Exception as Data.Exception
import qualified BishBosh.Types as T
import qualified Control.Arrow
import qualified Control.Exception
import qualified Data.Char
import qualified Data.List.Extra
import qualified Data.Maybe
#ifdef USE_POLYPARSE
import qualified BishBosh.Text.Poly as Text.Poly
#if USE_POLYPARSE == 1
import qualified Text.ParserCombinators.Poly.Lazy as Poly
#else /* Plain */
import qualified Text.ParserCombinators.Poly.Plain as Poly
#endif
#else /* Parsec */
import qualified Text.ParserCombinators.Parsec as Parsec
import Text.ParserCombinators.Parsec((<?>))
#endif
min' :: (Char, Char)
xMin, yMin :: Char
min' :: (Char, Char)
min'@(Char
xMin, Char
yMin) = (Char
'a', Char
'1')
origin :: (Int, Int)
xOrigin, yOrigin :: Int
origin :: (Int, Int)
origin@(Int
xOrigin, Int
yOrigin) = Char -> Int
Data.Char.ord (Char -> Int) -> (Char -> Int) -> (Char, Char) -> (Int, Int)
forall (a :: * -> * -> *) b c b' c'.
Arrow a =>
a b c -> a b' c' -> a (b, b') (c, c')
*** Char -> Int
Data.Char.ord ((Char, Char) -> (Int, Int)) -> (Char, Char) -> (Int, Int)
forall a b. (a -> b) -> a -> b
$ (Char, Char)
min'
xMax, yMax :: Char
(Char
xMax, Char
yMax) = Int -> Char
Data.Char.chr (Int -> Char) -> (Int -> Int) -> Int -> Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (
Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int -> Int
forall a. Enum a => a -> a
pred (Int -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
Cartesian.Abscissa.xLength)
) (Int -> Char) -> (Int -> Char) -> (Int, Int) -> (Char, Char)
forall (a :: * -> * -> *) b c b' c'.
Arrow a =>
a b c -> a b' c' -> a (b, b') (c, c')
*** Int -> Char
Data.Char.chr (Int -> Char) -> (Int -> Int) -> Int -> Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (
Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int -> Int
forall a. Enum a => a -> a
pred (Int -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
Cartesian.Ordinate.yLength)
) ((Int, Int) -> (Char, Char)) -> (Int, Int) -> (Char, Char)
forall a b. (a -> b) -> a -> b
$ (Int, Int)
origin
inXRange :: Char -> Bool
inXRange :: Char -> Bool
inXRange = (Bool -> Bool -> Bool) -> (Bool, Bool) -> Bool
forall a b c. (a -> b -> c) -> (a, b) -> c
uncurry Bool -> Bool -> Bool
(&&) ((Bool, Bool) -> Bool) -> (Char -> (Bool, Bool)) -> Char -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Char -> Char -> Bool
forall a. Ord a => a -> a -> Bool
>= Char
xMin) (Char -> Bool) -> (Char -> Bool) -> Char -> (Bool, Bool)
forall (a :: * -> * -> *) b c c'.
Arrow a =>
a b c -> a b c' -> a b (c, c')
&&& (Char -> Char -> Bool
forall a. Ord a => a -> a -> Bool
<= Char
xMax))
inYRange :: Char -> Bool
inYRange :: Char -> Bool
inYRange = (Bool -> Bool -> Bool) -> (Bool, Bool) -> Bool
forall a b c. (a -> b -> c) -> (a, b) -> c
uncurry Bool -> Bool -> Bool
(&&) ((Bool, Bool) -> Bool) -> (Char -> (Bool, Bool)) -> Char -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Char -> Char -> Bool
forall a. Ord a => a -> a -> Bool
>= Char
yMin) (Char -> Bool) -> (Char -> Bool) -> Char -> (Bool, Bool)
forall (a :: * -> * -> *) b c c'.
Arrow a =>
a b c -> a b c' -> a b (c, c')
&&& (Char -> Char -> Bool
forall a. Ord a => a -> a -> Bool
<= Char
yMax))
regexSyntax :: String
regexSyntax :: String
regexSyntax = String -> ShowS
showString String
"([a-h][1-8]){2}[" ShowS -> ShowS
forall a b. (a -> b) -> a -> b
$ String -> ShowS
showString (
(Rank -> String) -> [Rank] -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap Rank -> String
forall a. Show a => a -> String
show [Rank]
Attribute.Rank.promotionProspects
) String
"]?"
#ifdef USE_POLYPARSE
abscissaParser :: Enum x => Text.Poly.TextParser x
{-# SPECIALISE abscissaParser :: Text.Poly.TextParser T.X #-}
abscissaParser :: TextParser x
abscissaParser = (
Int -> x
forall a. Enum a => Int -> a
toEnum (Int -> x) -> (Char -> Int) -> Char -> x
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Abscissa.xOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
xOrigin)) (Int -> Int) -> (Char -> Int) -> Char -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Char -> Int
Data.Char.ord
) (Char -> x) -> Parser Char Char -> TextParser x
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
`fmap` (Char -> Bool) -> String -> Parser Char Char
forall t. Show t => (t -> Bool) -> String -> Parser t t
Poly.satisfyMsg Char -> Bool
inXRange String
"Abscissa"
ordinateParser :: Enum y => Text.Poly.TextParser y
{-# SPECIALISE ordinateParser :: Text.Poly.TextParser T.Y #-}
ordinateParser :: TextParser y
ordinateParser = (
Int -> y
forall a. Enum a => Int -> a
toEnum (Int -> y) -> (Char -> Int) -> Char -> y
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Ordinate.yOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
yOrigin)) (Int -> Int) -> (Char -> Int) -> Char -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Char -> Int
Data.Char.ord
) (Char -> y) -> Parser Char Char -> TextParser y
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
`fmap` (Char -> Bool) -> String -> Parser Char Char
forall t. Show t => (t -> Bool) -> String -> Parser t t
Poly.satisfyMsg Char -> Bool
inYRange String
"Ordinate"
coordinatesParser :: (
Enum x,
Enum y,
Ord x,
Ord y
) => Text.Poly.TextParser (Cartesian.Coordinates.Coordinates x y)
{-# SPECIALISE coordinatesParser :: Text.Poly.TextParser (Cartesian.Coordinates.Coordinates T.X T.Y) #-}
coordinatesParser :: TextParser (Coordinates x y)
coordinatesParser = do
x
x <- TextParser x
forall x. Enum x => TextParser x
abscissaParser
y
y <- TextParser y
forall x. Enum x => TextParser x
ordinateParser
Coordinates x y -> TextParser (Coordinates x y)
forall (m :: * -> *) a. Monad m => a -> m a
return (Coordinates x y -> TextParser (Coordinates x y))
-> Coordinates x y -> TextParser (Coordinates x y)
forall a b. (a -> b) -> a -> b
$ x -> y -> Coordinates x y
forall x y.
(Enum x, Enum y, Ord x, Ord y) =>
x -> y -> Coordinates x y
Cartesian.Coordinates.mkCoordinates x
x y
y
#else
abscissaParser :: Enum x => Parsec.Parser x
{-# SPECIALISE abscissaParser :: Parsec.Parser T.X #-}
abscissaParser = (
toEnum . (+ (Cartesian.Abscissa.xOrigin - xOrigin)) . Data.Char.ord
) <$> Parsec.satisfy inXRange <?> "Abscissa"
ordinateParser :: Enum y => Parsec.Parser y
{-# SPECIALISE ordinateParser :: Parsec.Parser T.X #-}
ordinateParser = (
toEnum . (+ (Cartesian.Ordinate.yOrigin - yOrigin)) . Data.Char.ord
) <$> Parsec.satisfy inYRange <?> "Ordinate"
coordinatesParser :: (
Enum x,
Enum y,
Ord x,
Ord y
) => Parsec.Parser (Cartesian.Coordinates.Coordinates x y)
{-# SPECIALISE coordinatesParser :: Parsec.Parser (Cartesian.Coordinates.Coordinates T.X T.Y) #-}
coordinatesParser = Cartesian.Coordinates.mkCoordinates <$> abscissaParser <*> ordinateParser
#endif
data PureCoordinate x y = MkPureCoordinate {
PureCoordinate x y -> Move x y
getMove :: Component.Move.Move x y,
PureCoordinate x y -> Maybe Rank
getMaybePromotionRank :: Maybe Attribute.Rank.Rank
} deriving PureCoordinate x y -> PureCoordinate x y -> Bool
(PureCoordinate x y -> PureCoordinate x y -> Bool)
-> (PureCoordinate x y -> PureCoordinate x y -> Bool)
-> Eq (PureCoordinate x y)
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
forall x y.
(Eq x, Eq y) =>
PureCoordinate x y -> PureCoordinate x y -> Bool
/= :: PureCoordinate x y -> PureCoordinate x y -> Bool
$c/= :: forall x y.
(Eq x, Eq y) =>
PureCoordinate x y -> PureCoordinate x y -> Bool
== :: PureCoordinate x y -> PureCoordinate x y -> Bool
$c== :: forall x y.
(Eq x, Eq y) =>
PureCoordinate x y -> PureCoordinate x y -> Bool
Eq
mkPureCoordinate :: Component.Move.Move x y -> Maybe Attribute.Rank.Rank -> PureCoordinate x y
mkPureCoordinate :: Move x y -> Maybe Rank -> PureCoordinate x y
mkPureCoordinate Move x y
move Maybe Rank
maybePromotionRank
| Just Rank
rank <- Maybe Rank
maybePromotionRank
, Rank
rank Rank -> [Rank] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`notElem` [Rank]
Attribute.Rank.promotionProspects = Exception -> PureCoordinate x y
forall a e. Exception e => e -> a
Control.Exception.throw (Exception -> PureCoordinate x y)
-> (String -> Exception) -> String -> PureCoordinate x y
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Exception
Data.Exception.mkInvalidDatum (String -> Exception) -> ShowS -> String -> Exception
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> ShowS
showString String
"BishBosh.Notation.PureCoordinate.mkPureCoordinate:\tcan't promote to a " (String -> PureCoordinate x y) -> String -> PureCoordinate x y
forall a b. (a -> b) -> a -> b
$ Rank -> ShowS
forall a. Show a => a -> ShowS
shows Rank
rank String
"."
| Bool
otherwise = MkPureCoordinate :: forall x y. Move x y -> Maybe Rank -> PureCoordinate x y
MkPureCoordinate {
getMove :: Move x y
getMove = Move x y
move,
getMaybePromotionRank :: Maybe Rank
getMaybePromotionRank = Maybe Rank
maybePromotionRank
}
mkPureCoordinate' :: Attribute.Rank.Promotable promotable => Component.Move.Move x y -> promotable -> PureCoordinate x y
mkPureCoordinate' :: Move x y -> promotable -> PureCoordinate x y
mkPureCoordinate' Move x y
move = Move x y -> Maybe Rank -> PureCoordinate x y
forall x y. Move x y -> Maybe Rank -> PureCoordinate x y
mkPureCoordinate Move x y
move (Maybe Rank -> PureCoordinate x y)
-> (promotable -> Maybe Rank) -> promotable -> PureCoordinate x y
forall b c a. (b -> c) -> (a -> b) -> a -> c
. promotable -> Maybe Rank
forall a. Promotable a => a -> Maybe Rank
Attribute.Rank.getMaybePromotionRank
encode :: (Enum x, Enum y) => Cartesian.Coordinates.Coordinates x y -> (ShowS, ShowS)
encode :: Coordinates x y -> (ShowS, ShowS)
encode = Char -> ShowS
showChar (Char -> ShowS)
-> (Coordinates x y -> Char) -> Coordinates x y -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> Char
Data.Char.chr (Int -> Char)
-> (Coordinates x y -> Int) -> Coordinates x y -> Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
xOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
Cartesian.Abscissa.xOrigin)) (Int -> Int) -> (Coordinates x y -> Int) -> Coordinates x y -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. x -> Int
forall a. Enum a => a -> Int
fromEnum (x -> Int) -> (Coordinates x y -> x) -> Coordinates x y -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Coordinates x y -> x
forall x y. Coordinates x y -> x
Cartesian.Coordinates.getX (Coordinates x y -> ShowS)
-> (Coordinates x y -> ShowS) -> Coordinates x y -> (ShowS, ShowS)
forall (a :: * -> * -> *) b c c'.
Arrow a =>
a b c -> a b c' -> a b (c, c')
&&& Char -> ShowS
showChar (Char -> ShowS)
-> (Coordinates x y -> Char) -> Coordinates x y -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> Char
Data.Char.chr (Int -> Char)
-> (Coordinates x y -> Int) -> Coordinates x y -> Char
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
yOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
Cartesian.Ordinate.yOrigin)) (Int -> Int) -> (Coordinates x y -> Int) -> Coordinates x y -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. y -> Int
forall a. Enum a => a -> Int
fromEnum (y -> Int) -> (Coordinates x y -> y) -> Coordinates x y -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Coordinates x y -> y
forall x y. Coordinates x y -> y
Cartesian.Coordinates.getY
showsCoordinates :: (Enum x, Enum y) => Cartesian.Coordinates.Coordinates x y -> ShowS
showsCoordinates :: Coordinates x y -> ShowS
showsCoordinates = (ShowS -> ShowS -> ShowS) -> (ShowS, ShowS) -> ShowS
forall a b c. (a -> b -> c) -> (a, b) -> c
uncurry ShowS -> ShowS -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
(.) ((ShowS, ShowS) -> ShowS)
-> (Coordinates x y -> (ShowS, ShowS)) -> Coordinates x y -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Coordinates x y -> (ShowS, ShowS)
forall x y. (Enum x, Enum y) => Coordinates x y -> (ShowS, ShowS)
encode
readsCoordinates :: (
Enum x,
Enum y,
Ord x,
Ord y
) => ReadS (Cartesian.Coordinates.Coordinates x y)
readsCoordinates :: ReadS (Coordinates x y)
readsCoordinates String
s = case ShowS
Data.List.Extra.trimStart String
s of
Char
x : Char
y : String
remainder -> (Coordinates x y -> (Coordinates x y, String))
-> [Coordinates x y] -> [(Coordinates x y, String)]
forall a b. (a -> b) -> [a] -> [b]
map (
(Coordinates x y -> String -> (Coordinates x y, String))
-> String -> Coordinates x y -> (Coordinates x y, String)
forall a b c. (a -> b -> c) -> b -> a -> c
flip (,) String
remainder
) ([Coordinates x y] -> [(Coordinates x y, String)])
-> (Maybe (Coordinates x y) -> [Coordinates x y])
-> Maybe (Coordinates x y)
-> [(Coordinates x y, String)]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Maybe (Coordinates x y) -> [Coordinates x y]
forall a. Maybe a -> [a]
Data.Maybe.maybeToList (Maybe (Coordinates x y) -> [(Coordinates x y, String)])
-> Maybe (Coordinates x y) -> [(Coordinates x y, String)]
forall a b. (a -> b) -> a -> b
$ x -> y -> Maybe (Coordinates x y)
forall x y.
(Enum x, Enum y, Ord x, Ord y) =>
x -> y -> Maybe (Coordinates x y)
Cartesian.Coordinates.mkMaybeCoordinates (
Int -> x
forall a. Enum a => Int -> a
toEnum (Int -> x) -> Int -> x
forall a b. (a -> b) -> a -> b
$ Char -> Int
Data.Char.ord Char
x Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Abscissa.xOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
xOrigin)
) (
Int -> y
forall a. Enum a => Int -> a
toEnum (Int -> y) -> Int -> y
forall a b. (a -> b) -> a -> b
$ Char -> Int
Data.Char.ord Char
y Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Ordinate.yOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
yOrigin)
)
String
_ -> []
instance (Enum x, Enum y) => Show (PureCoordinate x y) where
showsPrec :: Int -> PureCoordinate x y -> ShowS
showsPrec Int
_ MkPureCoordinate {
getMove :: forall x y. PureCoordinate x y -> Move x y
getMove = Move x y
move,
getMaybePromotionRank :: forall x y. PureCoordinate x y -> Maybe Rank
getMaybePromotionRank = Maybe Rank
maybePromotionRank
} = Coordinates x y -> ShowS
forall x y. (Enum x, Enum y) => Coordinates x y -> ShowS
showsCoordinates (
Move x y -> Coordinates x y
forall x y. Move x y -> Coordinates x y
Component.Move.getSource Move x y
move
) ShowS -> ShowS -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Coordinates x y -> ShowS
forall x y. (Enum x, Enum y) => Coordinates x y -> ShowS
showsCoordinates (
Move x y -> Coordinates x y
forall x y. Move x y -> Coordinates x y
Component.Move.getDestination Move x y
move
) ShowS -> ShowS -> ShowS
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ShowS -> (Rank -> ShowS) -> Maybe Rank -> ShowS
forall b a. b -> (a -> b) -> Maybe a -> b
Data.Maybe.maybe ShowS
forall a. a -> a
id Rank -> ShowS
forall a. Show a => a -> ShowS
shows Maybe Rank
maybePromotionRank
instance (
Enum x,
Enum y,
Ord x,
Ord y
) => Read (PureCoordinate x y) where
readsPrec :: Int -> ReadS (PureCoordinate x y)
readsPrec Int
_ String
s = case ShowS
Data.List.Extra.trimStart String
s of
Char
x : Char
y : Char
x' : Char
y' : String
remainder -> let
translate :: Char -> Char -> Maybe (Coordinates x y)
translate Char
x'' Char
y'' = x -> y -> Maybe (Coordinates x y)
forall x y.
(Enum x, Enum y, Ord x, Ord y) =>
x -> y -> Maybe (Coordinates x y)
Cartesian.Coordinates.mkMaybeCoordinates (
Int -> x
forall a. Enum a => Int -> a
toEnum (Int -> x) -> Int -> x
forall a b. (a -> b) -> a -> b
$ Char -> Int
Data.Char.ord Char
x'' Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Abscissa.xOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
xOrigin)
) (
Int -> y
forall a. Enum a => Int -> a
toEnum (Int -> y) -> Int -> y
forall a b. (a -> b) -> a -> b
$ Char -> Int
Data.Char.ord Char
y'' Int -> Int -> Int
forall a. Num a => a -> a -> a
+ (Int
Cartesian.Ordinate.yOrigin Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
yOrigin)
)
in [
(Maybe Rank -> PureCoordinate x y)
-> (Maybe Rank, String) -> (PureCoordinate x y, String)
forall (a :: * -> * -> *) b c d.
Arrow a =>
a b c -> a (b, d) (c, d)
Control.Arrow.first (
Move x y -> Maybe Rank -> PureCoordinate x y
forall x y. Move x y -> Maybe Rank -> PureCoordinate x y
mkPureCoordinate (Move x y -> Maybe Rank -> PureCoordinate x y)
-> Move x y -> Maybe Rank -> PureCoordinate x y
forall a b. (a -> b) -> a -> b
$ Coordinates x y -> Coordinates x y -> Move x y
forall x y.
(Eq x, Eq y) =>
Coordinates x y -> Coordinates x y -> Move x y
Component.Move.mkMove Coordinates x y
source Coordinates x y
destination
) (
case ReadS Rank
forall a. Read a => ReadS a
reads ReadS Rank -> ReadS Rank
forall a b. (a -> b) -> a -> b
$ Int -> ShowS
forall a. Int -> [a] -> [a]
take Int
1 String
remainder of
[(Rank
rank, String
"")] -> if Rank
rank Rank -> [Rank] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem` [Rank]
Attribute.Rank.promotionProspects
then (Rank -> Maybe Rank
forall a. a -> Maybe a
Just Rank
rank, ShowS
forall a. [a] -> [a]
tail String
remainder)
else (Maybe Rank
forall a. Maybe a
Nothing, String
remainder)
[(Rank, String)]
_ -> (Maybe Rank
forall a. Maybe a
Nothing, String
remainder)
) |
Coordinates x y
source <- Maybe (Coordinates x y) -> [Coordinates x y]
forall a. Maybe a -> [a]
Data.Maybe.maybeToList (Maybe (Coordinates x y) -> [Coordinates x y])
-> Maybe (Coordinates x y) -> [Coordinates x y]
forall a b. (a -> b) -> a -> b
$ Char -> Char -> Maybe (Coordinates x y)
forall x y.
(Enum x, Enum y, Ord x, Ord y) =>
Char -> Char -> Maybe (Coordinates x y)
translate Char
x Char
y,
Coordinates x y
destination <- Maybe (Coordinates x y) -> [Coordinates x y]
forall a. Maybe a -> [a]
Data.Maybe.maybeToList (Maybe (Coordinates x y) -> [Coordinates x y])
-> Maybe (Coordinates x y) -> [Coordinates x y]
forall a b. (a -> b) -> a -> b
$ Char -> Char -> Maybe (Coordinates x y)
forall x y.
(Enum x, Enum y, Ord x, Ord y) =>
Char -> Char -> Maybe (Coordinates x y)
translate Char
x' Char
y',
Coordinates x y
source Coordinates x y -> Coordinates x y -> Bool
forall a. Eq a => a -> a -> Bool
/= Coordinates x y
destination
]
String
_ -> []
instance Attribute.Rank.Promotable (PureCoordinate x y) where
getMaybePromotionRank :: PureCoordinate x y -> Maybe Rank
getMaybePromotionRank = PureCoordinate x y -> Maybe Rank
forall x y. PureCoordinate x y -> Maybe Rank
getMaybePromotionRank