Data.HashMap.Throw

lookupOrThrow function for HashMap.

Documentation

lookupOrThrow :: (Eq a, Ord a, Show a, Typeable a, Hashable a, MonadThrow m) => a -> HashMap a b -> m b

lookup lifted to MonadThrow that throws KeyNotFoundException.

newtype KeyNotFoundException a

Exception thrown when a key is not found in a hashmap.

Constructors

KeyNotFoundException a

Instances

Eq a => Eq (KeyNotFoundException a)

Defined in Data.HashMap.Throw

Methods

(==) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

(/=) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

Ord a => Ord (KeyNotFoundException a)

Defined in Data.HashMap.Throw

Methods

compare :: KeyNotFoundException a -> KeyNotFoundException a -> Ordering

(<) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

(<=) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

(>) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

(>=) :: KeyNotFoundException a -> KeyNotFoundException a -> Bool

max :: KeyNotFoundException a -> KeyNotFoundException a -> KeyNotFoundException a

min :: KeyNotFoundException a -> KeyNotFoundException a -> KeyNotFoundException a

Show a => Show (KeyNotFoundException a)

Defined in Data.HashMap.Throw

Methods

showsPrec :: Int -> KeyNotFoundException a -> ShowS

show :: KeyNotFoundException a -> String

showList :: [KeyNotFoundException a] -> ShowS

(Typeable a, Show a) => Exception (KeyNotFoundException a)

Defined in Data.HashMap.Throw

Methods

toException :: KeyNotFoundException a -> SomeException

fromException :: SomeException -> Maybe (KeyNotFoundException a)

displayException :: KeyNotFoundException a -> String