Parameter Over_selective.F

type 'a t

The type held by the Selective.

val select : ('a, 'b) Preface_core.Shims.Either.t t -> ('a -> 'b) t -> 'b t

select e f apply f if e is Left. It allow to skip effect using Right.

val branch : ('a, 'b) Preface_core.Shims.Either.t t -> ('a -> 'c) t -> ('b -> 'c) t -> 'c t

branch is like select. It chooses between two effects.

val apply : ('a -> 'b) t -> 'a t -> 'b t

Applicative functor of ('a -> 'b) t over 'a t to 'b t.

val map : ('a -> 'b) -> 'a t -> 'b t

Mapping over from 'a to 'b over 'a t to 'b t.

val product : 'a t -> 'b t -> ('a * 'b) t

Product functor mapping from 'a t and 'b t to ('a * 'b) t.

val pure : 'a -> 'a t

Lift a value from 'a into a new 'a t.

val lift2 : ('a -> 'b -> 'c) -> 'a t -> 'b t -> 'c t

Mapping over from 'a and 'b to 'c over 'a t and 'b t to 'c t.