Copyright	(C) 2014 Jan Stolarek
License	BSD-style (see LICENSE)
Maintainer	jan.stolarek@p.lodz.pl
Stability	experimental
Portability	non-portable
Safe Haskell	None
Language	Haskell2010

Data.Promotion.Prelude.Either

Contents

Promoted functions from Data.Either
Defunctionalization symbols

Description

Defines promoted functions and datatypes relating to Either, including a promoted version of all the definitions in Data.Either.

Because many of these definitions are produced by Template Haskell, it is not possible to create proper Haddock documentation. Please look up the corresponding operation in Data.Either. Also, please excuse the apparent repeated variable names. This is due to an interaction between Template Haskell and Haddock.

Synopsis

Promoted functions from `Data.Either`

either_ :: forall a c b. (a -> c) -> (b -> c) -> Either a b -> c Source

type family Either_ a a a :: c Source

Equations

Either_ f z (Left x) = Apply f x
Either_ z g (Right y) = Apply g y

The preceding two definitions are derived from the function either in Data.Either. The extra underscore is to avoid name clashes with the type Either.

type family Lefts a :: [a] Source

Equations

Lefts `[]` = `[]`
Lefts ((:) (Left x) xs) = Apply (Apply (:$) x) (Apply LeftsSym0 xs)
Lefts ((:) (Right z) xs) = Apply LeftsSym0 xs

type family Rights a :: [b] Source

Equations

Rights `[]` = `[]`
Rights ((:) (Left z) xs) = Apply RightsSym0 xs
Rights ((:) (Right x) xs) = Apply (Apply (:$) x) (Apply RightsSym0 xs)

type family PartitionEithers a :: ([a], [b]) Source

Equations

PartitionEithers a_1627572955 = Apply (Apply (Apply FoldrSym0 (Apply (Apply Either_Sym0 (Let1627572962LeftSym1 a_1627572955)) (Let1627572962RightSym1 a_1627572955))) (Apply (Apply Tuple2Sym0 `[]`) `[]`)) a_1627572955

type family IsLeft a :: Bool Source

Equations

IsLeft (Left z) = TrueSym0
IsLeft (Right z) = FalseSym0

type family IsRight a :: Bool Source

Equations

IsRight (Left z) = FalseSym0
IsRight (Right z) = TrueSym0

Defunctionalization symbols

data LeftSym0 l Source

Instances

SuppressUnusedWarnings (TyFun k (Either k k) -> *) (LeftSym0 k k)
type Apply (Either k k1) k (LeftSym0 k k1) l0 = LeftSym1 k k1 l0

type LeftSym1 t = Left t Source

data RightSym0 l Source

Instances

SuppressUnusedWarnings (TyFun k (Either k k) -> *) (RightSym0 k k)
type Apply (Either k1 k) k (RightSym0 k k1) l0 = RightSym1 k k1 l0

type RightSym1 t = Right t Source

data Either_Sym0 l Source

Instances

SuppressUnusedWarnings (TyFun (TyFun k k -> ) (TyFun (TyFun k k -> ) (TyFun (Either k k) k -> ) -> ) -> *) (Either_Sym0 k k k)
type Apply (TyFun (TyFun k2 k1 -> ) (TyFun (Either k k2) k1 -> ) -> ) (TyFun k k1 -> ) (Either_Sym0 k k1 k2) l0 = Either_Sym1 k k1 k2 l0

data Either_Sym1 l l Source

Instances

SuppressUnusedWarnings ((TyFun k k -> ) -> TyFun (TyFun k k -> ) (TyFun (Either k k) k -> ) -> ) (Either_Sym1 k k k)
type Apply (TyFun (Either k1 k) k2 -> ) (TyFun k k2 -> ) (Either_Sym1 k1 k2 k l1) l0 = Either_Sym2 k1 k2 k l1 l0

data Either_Sym2 l l l Source

Instances

SuppressUnusedWarnings ((TyFun k k -> ) -> (TyFun k k -> ) -> TyFun (Either k k) k -> *) (Either_Sym2 k k k)
type Apply k1 (Either k k2) (Either_Sym2 k k1 k2 l1 l2) l0 = Either_Sym3 k k1 k2 l1 l2 l0

type Either_Sym3 t t t = Either_ t t t Source

data LeftsSym0 l Source

Instances

SuppressUnusedWarnings (TyFun [Either k k] [k] -> *) (LeftsSym0 k k)
type Apply [k] [Either k k1] (LeftsSym0 k k1) l0 = LeftsSym1 k k1 l0

type LeftsSym1 t = Lefts t Source

data RightsSym0 l Source

Instances

SuppressUnusedWarnings (TyFun [Either k k] [k] -> *) (RightsSym0 k k)
type Apply [k] [Either k1 k] (RightsSym0 k1 k) l0 = RightsSym1 k1 k l0

type RightsSym1 t = Rights t Source

data IsLeftSym0 l Source

Instances

SuppressUnusedWarnings (TyFun (Either k k) Bool -> *) (IsLeftSym0 k k)
type Apply Bool (Either k k1) (IsLeftSym0 k k1) l0 = IsLeftSym1 k k1 l0

type IsLeftSym1 t = IsLeft t Source

data IsRightSym0 l Source

Instances

SuppressUnusedWarnings (TyFun (Either k k) Bool -> *) (IsRightSym0 k k)
type Apply Bool (Either k k1) (IsRightSym0 k k1) l0 = IsRightSym1 k k1 l0

type IsRightSym1 t = IsRight t Source

Promoted functions from Data.Either

Defunctionalization symbols

Promoted functions from `Data.Either`