generic

Documentation

Index

• func AtKey[M ~map[K]V, S any, V any, K comparable](key K) func(sa L.Lens[S, M]) L.Lens[S, O.Option[V]]
• func AtRecord[M ~map[K]V, V any, K comparable](key K) L.Lens[M, O.Option[V]]

Functions

func AtKey

func AtKey[M ~map[K]V, S any, V any, K comparable](key K) func(sa L.Lens[S, M]) L.Lens[S, O.Option[V]]

AtKey returns a `Lens` focused on a required key of a `ReadonlyRecord`

func AtRecord

func AtRecord[M ~map[K]V, V any, K comparable](key K) L.Lens[M, O.Option[V]]

AtRecord returns a lens that focusses on a value in a record