Environment

Documentation

newtype EnvName

A key in the Environment.

Constructors

EnvName

Fields

• unEnvName :: Text

Instances

Eq EnvName

Methods

(==) :: EnvName -> EnvName -> Bool

(/=) :: EnvName -> EnvName -> Bool

Ord EnvName

Methods

compare :: EnvName -> EnvName -> Ordering

(<) :: EnvName -> EnvName -> Bool

(<=) :: EnvName -> EnvName -> Bool

(>) :: EnvName -> EnvName -> Bool

(>=) :: EnvName -> EnvName -> Bool

max :: EnvName -> EnvName -> EnvName

min :: EnvName -> EnvName -> EnvName

Show EnvName

Methods

showsPrec :: Int -> EnvName -> ShowS

show :: EnvName -> String

showList :: [EnvName] -> ShowS

Printable EnvName

Methods

print :: Printer p => EnvName -> p

IsText EnvName

Methods

packed :: Iso' String EnvName

builder :: Iso' EnvName Builder

text :: IndexedTraversal' Int EnvName Char

newtype EnvValue

A value in the Environment

Constructors

EnvValue

Fields

• unEnvValue :: Text

Instances

Eq EnvValue

Methods

(==) :: EnvValue -> EnvValue -> Bool

(/=) :: EnvValue -> EnvValue -> Bool

Ord EnvValue

Methods

compare :: EnvValue -> EnvValue -> Ordering

(<) :: EnvValue -> EnvValue -> Bool

(<=) :: EnvValue -> EnvValue -> Bool

(>) :: EnvValue -> EnvValue -> Bool

(>=) :: EnvValue -> EnvValue -> Bool

max :: EnvValue -> EnvValue -> EnvValue

min :: EnvValue -> EnvValue -> EnvValue

Show EnvValue

Methods

showsPrec :: Int -> EnvValue -> ShowS

show :: EnvValue -> String

showList :: [EnvValue] -> ShowS

Printable EnvValue

Methods

print :: Printer p => EnvValue -> p

IsText EnvValue

Methods

packed :: Iso' String EnvValue

builder :: Iso' EnvValue Builder

text :: IndexedTraversal' Int EnvValue Char

lookupEnv :: MonadIO m => EnvName -> m (Maybe EnvValue)

setEnv :: MonadIO m => EnvName -> EnvValue -> m ()

environment :: MonadIO m => Lens EnvName (m ()) (m (Maybe EnvValue)) EnvValue

Lens for the system environment.

lens ∷ Functor f => (s -> a) -> (s -> b -> t) -> (a -> f b) -> s -> f t

Lens s t a b = Functor f ⇒ (a → f b) → s → f t

lookupEnv s → a: EnvName → m (Maybe EnvValue)

setEnv s → b → t: EnvName → EnvValue → m ()

s: EnvName t: m () a: m (Maybe EnvValue) b: EnvValue

newtype Arg

Constructors

Arg

Fields

• unArg :: Text

Instances

Eq Arg

Methods

(==) :: Arg -> Arg -> Bool

(/=) :: Arg -> Arg -> Bool

Ord Arg

Methods

compare :: Arg -> Arg -> Ordering

(<) :: Arg -> Arg -> Bool

(<=) :: Arg -> Arg -> Bool

(>) :: Arg -> Arg -> Bool

(>=) :: Arg -> Arg -> Bool

max :: Arg -> Arg -> Arg

min :: Arg -> Arg -> Arg

Show Arg

Methods

showsPrec :: Int -> Arg -> ShowS

show :: Arg -> String

showList :: [Arg] -> ShowS

Printable Arg

Methods

print :: Printer p => Arg -> p

IsText Arg

Methods

packed :: Iso' String Arg

builder :: Iso' Arg Builder

text :: IndexedTraversal' Int Arg Char

args :: MonadIO m => m [Arg]

newtype ProgName

Constructors

ProgName

Fields

• unProgName :: Text

Instances

Eq ProgName

Methods

(==) :: ProgName -> ProgName -> Bool

(/=) :: ProgName -> ProgName -> Bool

Ord ProgName

Methods

compare :: ProgName -> ProgName -> Ordering

(<) :: ProgName -> ProgName -> Bool

(<=) :: ProgName -> ProgName -> Bool

(>) :: ProgName -> ProgName -> Bool

(>=) :: ProgName -> ProgName -> Bool

max :: ProgName -> ProgName -> ProgName

min :: ProgName -> ProgName -> ProgName

Show ProgName

Methods

showsPrec :: Int -> ProgName -> ShowS

show :: ProgName -> String

showList :: [ProgName] -> ShowS

Printable ProgName

Methods

print :: Printer p => ProgName -> p

IsText ProgName

Methods

packed :: Iso' String ProgName

builder :: Iso' ProgName Builder

text :: IndexedTraversal' Int ProgName Char

progName :: MonadIO m => m ProgName