Safe Haskell	None
Language	Haskell2010

Hackage.Security.Client.Formats

Contents

Formats
- Type level
- Term level
Key membership
- Utility
Map-like operations

Synopsis

Formats

Type level

data FormatUn #

data FormatGz #

Term level

data Format :: * -> * where #

Format is a singleton type (reflection type to term level)

NOTE: In the future we might add further compression formats.

Constructors

FUn :: Format FormatUn
FGz :: Format FormatGz

Instances

Eq (Format f) #
Methods (==) :: Format f -> Format f -> Bool # (/=) :: Format f -> Format f -> Bool #
Show (Format f) #
Methods showsPrec :: Int -> Format f -> ShowS # show :: Format f -> String # showList :: [Format f] -> ShowS #

data Formats :: * -> * -> * where #

Available formats

Rather than having a general list here, we enumerate all possibilities. This means we are very precise about what we expect, and we avoid any runtime errors about unexpect format definitions.

NOTE: If we add additional cases here (for dealing with additional formats) all calls to error "inaccessible" need to be reevaluated.

Constructors

FsNone :: Formats () a
FsUn :: a -> Formats (FormatUn :- ()) a
FsGz :: a -> Formats (FormatGz :- ()) a
FsUnGz :: a -> a -> Formats (FormatUn :- (FormatGz :- ())) a

Instances

Functor (Formats fs) #
Methods fmap :: (a -> b) -> Formats fs a -> Formats fs b # (<$) :: a -> Formats fs b -> Formats fs a #
Eq a => Eq (Formats fs a) #
Methods (==) :: Formats fs a -> Formats fs a -> Bool # (/=) :: Formats fs a -> Formats fs a -> Bool #
Show a => Show (Formats fs a) #
Methods showsPrec :: Int -> Formats fs a -> ShowS # show :: Formats fs a -> String # showList :: [Formats fs a] -> ShowS #

Key membership

data HasFormat :: * -> * -> * where #

HasFormat fs f is a proof that f is a key in fs.

See formatsMember and formatsLookup for typical usage.

Constructors

HFZ :: Format f -> HasFormat (f :- fs) f
HFS :: HasFormat fs f -> HasFormat (f' :- fs) f

Instances

Eq (HasFormat fs f) #
Methods (==) :: HasFormat fs f -> HasFormat fs f -> Bool # (/=) :: HasFormat fs f -> HasFormat fs f -> Bool #
Show (HasFormat fs f) #
Methods showsPrec :: Int -> HasFormat fs f -> ShowS # show :: HasFormat fs f -> String # showList :: [HasFormat fs f] -> ShowS #

Utility

hasFormatAbsurd :: HasFormat () f -> a #

hasFormatGet :: HasFormat fs f -> Format f #

Map-like operations

formatsMap :: (forall f. Format f -> a -> b) -> Formats fs a -> Formats fs b #

formatsMember :: Format f -> Formats fs a -> Maybe (HasFormat fs f) #

formatsLookup :: HasFormat fs f -> Formats fs a -> a #