data-rtuple (empty) → 1.0
raw patch · 4 files changed
+472/−0 lines, 4 filesdep +basedep +lensdep +typelevelsetup-changed
Dependencies added: base, lens, typelevel
Files
- LICENSE +202/−0
- Setup.hs +2/−0
- data-rtuple.cabal +52/−0
- src/Data/RTuple.hs +216/−0
+ LICENSE view
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+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ data-rtuple.cabal view
@@ -0,0 +1,52 @@+name: data-rtuple+version: 1.0+synopsis: Recursive tuple data structure. It is very usefull when implementing some lo-level operations, allowing to traverse different elements using Haskell's type classes.+-- description: +license: Apache-2.0+license-file: LICENSE+author: Wojciech Danilo+maintainer: Wojciech Danilo <wojciech.danilo@gmail.com>+stability: experimental+homepage: https://github.com/wdanilo/rtuple+bug-reports: https://github.com/wdanilo/rtuple/issues+copyright: Copyright (C) 2014 Wojciech Danilo+category: Text+build-type: Simple+-- extra-source-files: +cabal-version: >=1.10+++Library+ hs-source-dirs: src+ ghc-options: -Wall -O2+ default-language: Haskell2010++ default-extensions: ConstraintKinds+ DataKinds+ DefaultSignatures+ DeriveDataTypeable+ DeriveFoldable+ DeriveFunctor+ DeriveGeneric+ DeriveTraversable+ DoAndIfThenElse+ EmptyDataDecls+ FlexibleContexts+ FlexibleInstances+ GeneralizedNewtypeDeriving+ InstanceSigs+ LambdaCase+ MultiParamTypeClasses+ OverloadedStrings+ StandaloneDeriving+ TemplateHaskell+ TupleSections+ TypeOperators+ ViewPatterns+ TypeFamilies+ + exposed-modules: Data.RTuple++ build-depends: base >=4.6 && <4.9+ , typelevel+ , lens
+ src/Data/RTuple.hs view
@@ -0,0 +1,216 @@+{-# LANGUAGE NoMonomorphismRestriction #-}++{-# LANGUAGE TypeOperators #-}+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE KindSignatures #-}+{-# LANGUAGE FunctionalDependencies #-}+{-# LANGUAGE GADTs #-}+{-# LANGUAGE UndecidableInstances #-}+{-# LANGUAGE OverlappingInstances #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE TupleSections #-}+{-# LANGUAGE RankNTypes #-}+{-# LANGUAGE PolyKinds #-}++module Data.RTuple where++import Prelude hiding (head, tail, map)+import Data.Typeable+import GHC.TypeLits+import Unsafe.Coerce (unsafeCoerce)+import Type.Bool+import Control.Lens+import Control.Lens.Wrapped++----------------------------------------------------------------------------------+-- RTuple+----------------------------------------------------------------------------------++data RTuple a = RTuple { fromRTuple :: a } deriving (Eq, Ord)++data TList (t :: *) a = TList { fromTList :: a } deriving (Eq, Ord)+++--type family +--type family RTupData rt where RTupData (RTuple a) = a++--infixr 0 //+--(//) = (,)++-- === Wrapper ===++instance Wrapped (RTuple a) where+ type Unwrapped (RTuple a) = a+ _Wrapped' = iso fromRTuple RTuple++instance Wrapped (TList t a) where+ type Unwrapped (TList t a) = a+ _Wrapped' = iso fromTList TList+++-- === Show ===++class ShowRtup r where+ showRtup :: String -> r -> String++instance ShowRtup () where+ showRtup _ _ = ""++instance Show a => ShowRtup (a,()) where+ showRtup _ (a,()) = show a++instance (Show a, ShowRtup as) => ShowRtup (a,as) where+ showRtup sep (a,as) = show a ++ sep ++ showRtup sep as++instance ShowRtup a => Show (RTuple a) where+ show (RTuple a) = "RTuple (" ++ showRtup ", " a ++ ")"++-- === Head ===++type family HeadOf a++type instance HeadOf (RTuple (r,rs)) = r+type instance HeadOf (TList a l) = a++class Head a where+ head :: Lens' a (HeadOf a)++instance Head (RTuple (r,rs)) where head = lens (fst . view _Wrapped') (\(RTuple (_,rs)) r -> RTuple (r,rs))+instance (a ~ r) => Head (TList a (r,rs)) where head = lens (fst . view _Wrapped') (\(TList (_,rs)) r -> TList (r,rs))++-- === Tail ===++type family TailOf a++type instance TailOf (RTuple (r,rs)) = RTuple rs+type instance TailOf (TList a (r,rs)) = TList a rs++class Tail a where+ tail :: Lens' a (TailOf a)++instance Tail (RTuple (r,rs)) where tail = lens (\(RTuple (r,rs)) -> RTuple rs) (\(RTuple (r,_)) (RTuple rs) -> RTuple (r,rs))+instance Tail (TList a (r,rs)) where tail = lens (\(TList (r,rs)) -> TList rs) (\(TList (r,_)) (TList rs) -> TList (r,rs))+++-- === UncurryTuple ===++-- |converts function taking a tuple list as argument into standard haskell one+-- eg. `(a,(b,(c,()))) -> out` into `a -> b -> c -> out`+class UncurryTuple f out | f -> out where+ uncurryTuple :: f -> out++instance UncurryTuple (RTuple () -> a) a where+ uncurryTuple f = f $ RTuple ()++instance UncurryTuple (RTuple xs -> f) fout => UncurryTuple (RTuple (x,xs) -> f) (x -> fout) where+ uncurryTuple f = (\x -> uncurryTuple $ f . RTuple . (x,) . fromRTuple)+++-- === ToRTup ===++type family AsRTuple (a :: k)+++type instance AsRTuple ('[] :: [*]) = RTuple ()+type instance AsRTuple ((l ': ls) :: [*]) = RTuple (l, Unwrapped (AsRTuple ls))+++type family AsTListData t (a :: k)+++type AsTList t lst = TList t (AsTListData t lst)++type instance AsTListData t ('[] :: [*]) = ()+type instance AsTListData t ((l ': ls) :: [*]) = (t, Unwrapped (AsTList t ls))+++-- === ToTuple ===++-- TODO [refactor to a tuple package]+type family AsTuple a+type instance AsTuple (RTuple ()) = ()+type instance AsTuple (RTuple (t1,())) = t1++class ToTuple a lst | a -> lst where+ toTuple :: a -> lst++instance ToTuple (RTuple ()) () where toTuple _ = ()+instance ToTuple (RTuple (t1,())) t1 where toTuple (RTuple (t1,())) = t1+instance ToTuple (RTuple (t1,(t2,()))) (t1,t2) where toTuple (RTuple (t1,(t2,()))) = (t1,t2)+instance ToTuple (RTuple (t1,(t2,(t3,())))) (t1,t2,t3) where toTuple (RTuple (t1,(t2,(t3,())))) = (t1,t2,t3)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,()))))) (t1,t2,t3,t4) where toTuple (RTuple (t1,(t2,(t3,(t4,()))))) = (t1,t2,t3,t4)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,())))))) (t1,t2,t3,t4,t5) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,())))))) = (t1,t2,t3,t4,t5)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,()))))))) (t1,t2,t3,t4,t5,t6) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,()))))))) = (t1,t2,t3,t4,t5,t6)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,())))))))) (t1,t2,t3,t4,t5,t6,t7) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,())))))))) = (t1,t2,t3,t4,t5,t6,t7)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,()))))))))) (t1,t2,t3,t4,t5,t6,t7,t8) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,()))))))))) = (t1,t2,t3,t4,t5,t6,t7,t8)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,())))))))))) (t1,t2,t3,t4,t5,t6,t7,t8,t9) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,())))))))))) = (t1,t2,t3,t4,t5,t6,t7,t8,t9)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,()))))))))))) (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,()))))))))))) = (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,(t11,())))))))))))) (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,(t11,())))))))))))) = (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11)+instance ToTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,(t11,(t12,()))))))))))))) (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12) where toTuple (RTuple (t1,(t2,(t3,(t4,(t5,(t6,(t7,(t8,(t9,(t10,(t11,(t12,()))))))))))))) = (t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12)+++-- === Elem indexing ===++type family ElTypeAt (idx :: Nat) a++class ElAt idx a where+ elAt :: Proxy idx -> Lens' a (ElTypeAt idx a)++class ElAt' idx t where+ elAt' :: Proxy idx -> Lens' (TList t lst) t++--++type instance ElTypeAt n (RTuple (r,rs)) = If (n :== 0) r (ElTypeAt (n - 1) (RTuple rs))+--type instance ElTypeAt n (TList t (r,rs)) = If (n :== 0) t (ElTypeAt (n - 1) (TList t rs))+type instance ElTypeAt n (TList t lst) = t++instance {-# OVERLAPPABLE #-} ( ElAt (n - 1) (RTuple rs)+ , ElTypeAt n (RTuple (r,rs)) ~ ElTypeAt (n-1) (RTuple rs)+ ) => ElAt n (RTuple (r,rs)) where elAt _ = tail . elAt (Proxy :: Proxy (n-1))+instance {-# OVERLAPPABLE #-} ElAt 0 (RTuple (r,rs)) where elAt _ = head+++instance {-# OVERLAPPABLE #-} ( ElAt (n - 1) (TList t rs)+ , ElTypeAt n (TList t (r,rs)) ~ ElTypeAt (n-1) (TList t rs)+ ) => ElAt n (TList t (r,rs)) where elAt _ = tail . elAt (Proxy :: Proxy (n-1))+instance {-# OVERLAPPABLE #-} (t ~ r) => ElAt 0 (TList t (r,rs)) where elAt _ = head+++-- === RTup builder ===++--rtup = ++--class RTupBuilder b where+-- rtup :: +++--elAt0 :: ElTypeAt 0 a => a -> ElAt 0 a+--elAt0 = ElTypeAt (Proxy :: Proxy 0)++--elAt1 :: ElTypeAt 1 a => a -> ElAt 1 a+--elAt1 = ElTypeAt (Proxy :: Proxy 1)++--elAt2 :: ElTypeAt 2 a => a -> ElAt 2 a+--elAt2 = ElTypeAt (Proxy :: Proxy 2)++--elAt3 :: ElTypeAt 3 a => a -> ElAt 3 a+--elAt3 = ElTypeAt (Proxy :: Proxy 3)++--elAt4 :: ElTypeAt 4 a => a -> ElAt 4 a+--elAt4 = ElTypeAt (Proxy :: Proxy 4)++--elAt5 :: ElTypeAt 5 a => a -> ElAt 5 a+--elAt5 = ElTypeAt (Proxy :: Proxy 5)++--elAt6 :: ElTypeAt 6 a => a -> ElAt 6 a+--elAt6 = ElTypeAt (Proxy :: Proxy 6)++--elAt7 :: ElTypeAt 7 a => a -> ElAt 7 a+--elAt7 = ElTypeAt (Proxy :: Proxy 7)++--elAt8 :: ElTypeAt 8 a => a -> ElAt 8 a+--elAt8 = ElTypeAt (Proxy :: Proxy 8)++--elAt9 :: ElTypeAt 9 a => a -> ElAt 9 a+--elAt9 = ElTypeAt (Proxy :: Proxy 9)