Data.Extensible.Label

Experimental API for OverloadedLabels. GHC 8.0+ only

Documentation

訊 :: Proxy k -> FieldOptic k

Specialised version of itemAssoc.

Orphan instances

(Extensible f p e, Lookup xs k v2, Labelling k p, Wrapper h, ExtensibleConstr e xs (Field h :: Assoc Symbol v1 -> Type) (k :> v2), rep ~ Repr h v2, s ~ e xs (Field h :: Assoc Symbol v1 -> Type), s ~ t, rep ~ rep') => IsLabel k (p rep (f rep') -> p s (f t))

Methods

fromLabel :: p rep (f rep') -> p s (f t)

k ~ l => IsLabel k (Proxy l)

Methods

fromLabel :: Proxy l