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https://github.com/idris-lang/Idris2.git
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113 lines
2.7 KiB
Idris
113 lines
2.7 KiB
Idris
module Control.Applicative.Const
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import Data.Contravariant
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import Data.Bits
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public export
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record Const (a : Type) (b : Type) where
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constructor MkConst
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value : a
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public export
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Eq a => Eq (Const a b) where
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(==) = (==) `on` value
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public export
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Ord a => Ord (Const a b) where
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compare = compare `on` value
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export
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Show a => Show (Const a b) where
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showPrec p (MkConst v) = showCon p "MkConst" (showArg v)
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public export
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Semigroup a => Semigroup (Const a b) where
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MkConst x <+> MkConst y = MkConst (x <+> y)
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public export
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Monoid a => Monoid (Const a b) where
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neutral = MkConst neutral
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public export
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Num a => Num (Const a b) where
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MkConst x + MkConst y = MkConst (x + y)
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MkConst x * MkConst y = MkConst (x * y)
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fromInteger = MkConst . fromInteger
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public export
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Neg a => Neg (Const a b) where
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negate (MkConst x) = MkConst (negate x)
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MkConst x - MkConst y = MkConst (x - y)
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public export
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Abs a => Abs (Const a b) where
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abs (MkConst x) = MkConst (abs x)
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public export
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Fractional a => Fractional (Const a b) where
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recip (MkConst x) = MkConst (recip x)
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MkConst x / MkConst y = MkConst (x / y)
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public export
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Integral a => Integral (Const a b) where
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MkConst x `div` MkConst y = MkConst (x `div` y)
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MkConst x `mod` MkConst y = MkConst (x `mod` y)
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public export
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Bits a => Bits (Const a b) where
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Index = Index {a}
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MkConst x .&. MkConst y = MkConst (x .&. y)
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MkConst x .|. MkConst y = MkConst (x .|. y)
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MkConst x `xor` MkConst y = MkConst (x `xor` y)
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shiftL (MkConst v) ix = MkConst (shiftL v ix)
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shiftR (MkConst v) ix = MkConst (shiftR v ix)
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bit = MkConst . bit
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zeroBits = MkConst zeroBits
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complement (MkConst v) = MkConst (complement v)
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oneBits = MkConst oneBits
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complementBit (MkConst v) ix = MkConst (complementBit v ix)
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clearBit (MkConst v) ix = MkConst (clearBit v ix)
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testBit (MkConst v) ix = testBit v ix
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setBit (MkConst v) ix = MkConst (setBit v ix)
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public export
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FromString a => FromString (Const a b) where
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fromString = MkConst . fromString
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public export
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Functor (Const a) where
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map _ (MkConst v) = MkConst v
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public export
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Contravariant (Const a) where
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contramap _ (MkConst v) = MkConst v
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public export
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Monoid a => Applicative (Const a) where
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pure _ = MkConst neutral
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MkConst x <*> MkConst y = MkConst (x <+> y)
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public export
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Foldable (Const a) where
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foldr _ acc _ = acc
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foldl _ acc _ = acc
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null _ = True
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public export
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Traversable (Const a) where
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traverse _ (MkConst v) = pure (MkConst v)
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public export
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Bifunctor Const where
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bimap f _ (MkConst v) = MkConst (f v)
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public export
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Bifoldable Const where
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bifoldr f _ acc (MkConst v) = f v acc
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bifoldl f _ acc (MkConst v) = f acc v
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binull _ = False
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public export
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Bitraversable Const where
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bitraverse f _ (MkConst v) = MkConst <$> f v
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