Data.AssocList.ListLike.Concept

Association list type

type AssocList l a b = ListLike l (a, b)

Related modules

• Data.AssocList.ListLike.Eq - Functions that involve Eq constraints on the keys
• Data.AssocList.ListLike.Equivalence - Most of the same functions as the Eq module, but with an Equivalence parameter instead of an Eq constraint
• Data.AssocList.ListLike.Predicate - Most of the same functions as the Eq module, but specifying keys using a Predicate rather than a particular key
• Data.AssocList.ListLike.Ord - Functions that involve Ord constraints on the keys
• Data.AssocList.ListLike.Comparison - The same functions as the Ord module, but with a Comparison parameter instead of an Ord constraint.

Exception

data MissingAssocListKey

This exception shows up when one attempts to retrieve a value by key from an association list using a partial function with a type signature such as

(!) :: (LikeLike l (a, b), Eq a) => l -> a -> b

but no result can be obtained because the requested key is not present exists in the mapping.

Constructors

MissingAssocListKey

Instances

Eq MissingAssocListKey

Defined in Data.AssocList.ListLike.Concept

Methods

(==) :: MissingAssocListKey -> MissingAssocListKey -> Bool

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

Show MissingAssocListKey

Defined in Data.AssocList.ListLike.Concept

Methods

showsPrec :: Int -> MissingAssocListKey -> ShowS

show :: MissingAssocListKey -> String

showList :: [MissingAssocListKey] -> ShowS

Exception MissingAssocListKey

Defined in Data.AssocList.ListLike.Concept

Methods

toException :: MissingAssocListKey -> SomeException

fromException :: SomeException -> Maybe MissingAssocListKey

displayException :: MissingAssocListKey -> String