shithub: MicroHs

ref: eea5c5c8e74312b821a51bbd49c3f18edd05e2f5
dir: /lib/Data/Record.hs/

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module Data.Record(module Data.Record) where
import Primitives
import Data.Function
import Data.Proxy
import Data.Tuple

type  HasField :: forall (k::Kind) . k -> Type -> Type -> Constraint
class HasField x r a | x r -> a where
  hasField :: Proxy x -> r -> (a, a -> r)

getField :: forall x r a . HasField x r a => Proxy x -> r -> a
getField p = fst . hasField p

setField :: forall x r a . HasField x r a => Proxy x -> r -> a -> r
setField p = snd . hasField p