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

Data.Promotion.Prelude.Maybe

Contents

Promoted functions from Data.Maybe
Defunctionalization symbols

Description

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

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.Maybe. Also, please excuse the apparent repeated variable names. This is due to an interaction between Template Haskell and Haddock.

Synopsis

Promoted functions from `Data.Maybe`

maybe_ :: b -> (a -> b) -> Maybe a -> b #

type family Maybe_ (a :: b) (a :: TyFun a b -> Type) (a :: Maybe a) :: b where ... #

Equations

Maybe_ n _z_1627823911 Nothing = n
Maybe_ _z_1627823914 f (Just x) = Apply f x

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

type family IsJust (a :: Maybe a) :: Bool where ... #

Equations

IsJust Nothing = FalseSym0
IsJust (Just _z_1627825123) = TrueSym0

type family IsNothing (a :: Maybe a) :: Bool where ... #

Equations

IsNothing Nothing = TrueSym0
IsNothing (Just _z_1627825116) = FalseSym0

type family FromJust (a :: Maybe a) :: a where ... #

Equations

FromJust Nothing = Apply ErrorSym0 "Maybe.fromJust: Nothing"
FromJust (Just x) = x

type family FromMaybe (a :: a) (a :: Maybe a) :: a where ... #

Equations

FromMaybe d x = Case_1627825103 d x x

type family MaybeToList (a :: Maybe a) :: [a] where ... #

Equations

MaybeToList Nothing = '[]
MaybeToList (Just x) = Apply (Apply (:$) x) '[]

type family ListToMaybe (a :: [a]) :: Maybe a where ... #

Equations

ListToMaybe '[] = NothingSym0
ListToMaybe ((:) a _z_1627825084) = Apply JustSym0 a

type family CatMaybes (a :: [Maybe a]) :: [a] where ... #

Equations

CatMaybes '[] = '[]
CatMaybes ((:) (Just x) xs) = Apply (Apply (:$) x) (Apply CatMaybesSym0 xs)
CatMaybes ((:) Nothing xs) = Apply CatMaybesSym0 xs

type family MapMaybe (a :: TyFun a (Maybe b) -> Type) (a :: [a]) :: [b] where ... #

Equations

MapMaybe _z_1627825036 '[] = '[]
MapMaybe f ((:) x xs) = Case_1627825068 f x xs (Let1627825055Scrutinee_1627825025Sym3 f x xs)

Defunctionalization symbols

type NothingSym0 = Nothing #

data JustSym0 (l :: TyFun a822083585 (Maybe a822083585)) #

Instances

SuppressUnusedWarnings (TyFun a822083585 (Maybe a822083585) -> *) (JustSym0 a822083585) #
Methods suppressUnusedWarnings :: Proxy (JustSym0 a822083585) t -> () #
type Apply a (Maybe a) (JustSym0 a) l #
type Apply a (Maybe a) (JustSym0 a) l = Just a l

type JustSym1 (t :: a822083585) = Just t #

data Maybe_Sym0 (l :: TyFun b1627823889 (TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) -> Type)) #

Instances

SuppressUnusedWarnings (TyFun b1627823889 (TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) -> Type) -> *) (Maybe_Sym0 a1627823890 b1627823889) #
Methods suppressUnusedWarnings :: Proxy (Maybe_Sym0 a1627823890 b1627823889) t -> () #
type Apply b1627823889 (TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) -> Type) (Maybe_Sym0 a1627823890 b1627823889) l #
type Apply b1627823889 (TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) -> Type) (Maybe_Sym0 a1627823890 b1627823889) l = Maybe_Sym1 a1627823890 b1627823889 l

data Maybe_Sym1 (l :: b1627823889) (l :: TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type)) #

Instances

SuppressUnusedWarnings (b1627823889 -> TyFun (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) -> *) (Maybe_Sym1 a1627823890 b1627823889) #
Methods suppressUnusedWarnings :: Proxy (Maybe_Sym1 a1627823890 b1627823889) t -> () #
type Apply (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) (Maybe_Sym1 a1627823890 b1627823889 l1) l2 #
type Apply (TyFun a1627823890 b1627823889 -> Type) (TyFun (Maybe a1627823890) b1627823889 -> Type) (Maybe_Sym1 a1627823890 b1627823889 l1) l2 = Maybe_Sym2 a1627823890 b1627823889 l1 l2

data Maybe_Sym2 (l :: b1627823889) (l :: TyFun a1627823890 b1627823889 -> Type) (l :: TyFun (Maybe a1627823890) b1627823889) #

Instances

SuppressUnusedWarnings (b1627823889 -> (TyFun a1627823890 b1627823889 -> Type) -> TyFun (Maybe a1627823890) b1627823889 -> *) (Maybe_Sym2 a1627823890 b1627823889) #
Methods suppressUnusedWarnings :: Proxy (Maybe_Sym2 a1627823890 b1627823889) t -> () #
type Apply (Maybe a) b (Maybe_Sym2 a b l1 l2) l3 #
type Apply (Maybe a) b (Maybe_Sym2 a b l1 l2) l3 = Maybe_ a b l1 l2 l3

type Maybe_Sym3 (t :: b1627823889) (t :: TyFun a1627823890 b1627823889 -> Type) (t :: Maybe a1627823890) = Maybe_ t t t #

data IsJustSym0 (l :: TyFun (Maybe a1627825002) Bool) #

Instances

SuppressUnusedWarnings (TyFun (Maybe a1627825002) Bool -> *) (IsJustSym0 a1627825002) #
Methods suppressUnusedWarnings :: Proxy (IsJustSym0 a1627825002) t -> () #
type Apply (Maybe a) Bool (IsJustSym0 a) l #
type Apply (Maybe a) Bool (IsJustSym0 a) l = IsJust a l

type IsJustSym1 (t :: Maybe a1627825002) = IsJust t #

data IsNothingSym0 (l :: TyFun (Maybe a1627825001) Bool) #

Instances

SuppressUnusedWarnings (TyFun (Maybe a1627825001) Bool -> *) (IsNothingSym0 a1627825001) #
Methods suppressUnusedWarnings :: Proxy (IsNothingSym0 a1627825001) t -> () #
type Apply (Maybe a) Bool (IsNothingSym0 a) l #
type Apply (Maybe a) Bool (IsNothingSym0 a) l = IsNothing a l

type IsNothingSym1 (t :: Maybe a1627825001) = IsNothing t #

data FromJustSym0 (l :: TyFun (Maybe a1627825000) a1627825000) #

Instances

SuppressUnusedWarnings (TyFun (Maybe a1627825000) a1627825000 -> *) (FromJustSym0 a1627825000) #
Methods suppressUnusedWarnings :: Proxy (FromJustSym0 a1627825000) t -> () #
type Apply (Maybe a) a (FromJustSym0 a) l #
type Apply (Maybe a) a (FromJustSym0 a) l = FromJust a l

type FromJustSym1 (t :: Maybe a1627825000) = FromJust t #

data FromMaybeSym0 (l :: TyFun a1627824999 (TyFun (Maybe a1627824999) a1627824999 -> Type)) #

Instances

SuppressUnusedWarnings (TyFun a1627824999 (TyFun (Maybe a1627824999) a1627824999 -> Type) -> *) (FromMaybeSym0 a1627824999) #
Methods suppressUnusedWarnings :: Proxy (FromMaybeSym0 a1627824999) t -> () #
type Apply a1627824999 (TyFun (Maybe a1627824999) a1627824999 -> Type) (FromMaybeSym0 a1627824999) l #
type Apply a1627824999 (TyFun (Maybe a1627824999) a1627824999 -> Type) (FromMaybeSym0 a1627824999) l = FromMaybeSym1 a1627824999 l

data FromMaybeSym1 (l :: a1627824999) (l :: TyFun (Maybe a1627824999) a1627824999) #

Instances

SuppressUnusedWarnings (a1627824999 -> TyFun (Maybe a1627824999) a1627824999 -> *) (FromMaybeSym1 a1627824999) #
Methods suppressUnusedWarnings :: Proxy (FromMaybeSym1 a1627824999) t -> () #
type Apply (Maybe a) a (FromMaybeSym1 a l1) l2 #
type Apply (Maybe a) a (FromMaybeSym1 a l1) l2 = FromMaybe a l1 l2

type FromMaybeSym2 (t :: a1627824999) (t :: Maybe a1627824999) = FromMaybe t t #

data MaybeToListSym0 (l :: TyFun (Maybe a1627824998) [a1627824998]) #

Instances

SuppressUnusedWarnings (TyFun (Maybe a1627824998) [a1627824998] -> *) (MaybeToListSym0 a1627824998) #
Methods suppressUnusedWarnings :: Proxy (MaybeToListSym0 a1627824998) t -> () #
type Apply (Maybe a) [a] (MaybeToListSym0 a) l #
type Apply (Maybe a) [a] (MaybeToListSym0 a) l = MaybeToList a l

type MaybeToListSym1 (t :: Maybe a1627824998) = MaybeToList t #

data ListToMaybeSym0 (l :: TyFun [a1627824997] (Maybe a1627824997)) #

Instances

SuppressUnusedWarnings (TyFun [a1627824997] (Maybe a1627824997) -> *) (ListToMaybeSym0 a1627824997) #
Methods suppressUnusedWarnings :: Proxy (ListToMaybeSym0 a1627824997) t -> () #
type Apply [a] (Maybe a) (ListToMaybeSym0 a) l #
type Apply [a] (Maybe a) (ListToMaybeSym0 a) l = ListToMaybe a l

type ListToMaybeSym1 (t :: [a1627824997]) = ListToMaybe t #

data CatMaybesSym0 (l :: TyFun [Maybe a1627824996] [a1627824996]) #

Instances

SuppressUnusedWarnings (TyFun [Maybe a1627824996] [a1627824996] -> *) (CatMaybesSym0 a1627824996) #
Methods suppressUnusedWarnings :: Proxy (CatMaybesSym0 a1627824996) t -> () #
type Apply [Maybe a] [a] (CatMaybesSym0 a) l #
type Apply [Maybe a] [a] (CatMaybesSym0 a) l = CatMaybes a l

type CatMaybesSym1 (t :: [Maybe a1627824996]) = CatMaybes t #

data MapMaybeSym0 (l :: TyFun (TyFun a1627824994 (Maybe b1627824995) -> Type) (TyFun [a1627824994] [b1627824995] -> Type)) #

Instances

SuppressUnusedWarnings (TyFun (TyFun a1627824994 (Maybe b1627824995) -> Type) (TyFun [a1627824994] [b1627824995] -> Type) -> *) (MapMaybeSym0 a1627824994 b1627824995) #
Methods suppressUnusedWarnings :: Proxy (MapMaybeSym0 a1627824994 b1627824995) t -> () #
type Apply (TyFun a1627824994 (Maybe b1627824995) -> Type) (TyFun [a1627824994] [b1627824995] -> Type) (MapMaybeSym0 a1627824994 b1627824995) l #
type Apply (TyFun a1627824994 (Maybe b1627824995) -> Type) (TyFun [a1627824994] [b1627824995] -> Type) (MapMaybeSym0 a1627824994 b1627824995) l = MapMaybeSym1 a1627824994 b1627824995 l

data MapMaybeSym1 (l :: TyFun a1627824994 (Maybe b1627824995) -> Type) (l :: TyFun [a1627824994] [b1627824995]) #

Instances

SuppressUnusedWarnings ((TyFun a1627824994 (Maybe b1627824995) -> Type) -> TyFun [a1627824994] [b1627824995] -> *) (MapMaybeSym1 a1627824994 b1627824995) #
Methods suppressUnusedWarnings :: Proxy (MapMaybeSym1 a1627824994 b1627824995) t -> () #
type Apply [a] [b] (MapMaybeSym1 a b l1) l2 #
type Apply [a] [b] (MapMaybeSym1 a b l1) l2 = MapMaybe a b l1 l2

type MapMaybeSym2 (t :: TyFun a1627824994 (Maybe b1627824995) -> Type) (t :: [a1627824994]) = MapMaybe t t #

Promoted functions from Data.Maybe

Defunctionalization symbols

Promoted functions from `Data.Maybe`