Via_dimap_and_right (p.preface.1.0.0.doc.preface.make.Preface_make.Choice.Via_dimap_and

Parameters

module Req : Preface_specs.Choice.WITH_DIMAP_AND_RIGHT

type ('a, 'b) t = ('a, 'b) Req.t

The type held by the Choice.

val dimap : ('a -> 'b) -> ('c -> 'd) -> ('b, 'c) t -> ('a, 'd) t

val contramap_fst : ('a -> 'b) -> ('b, 'c) t -> ('a, 'c) t

Contramapping over the first argument.

val map_snd : ('b -> 'c) -> ('a, 'b) t -> ('a, 'c) t

Mapping over the second argument.

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

Act on the left parameter of the sum.

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

Act on the right parameter of the sum.