Choice.WITH_CONTRAMAP_FST_AND_MAP_SND_AND_LEFT
Minimal interface using contramap_fst and map_snd and left.
contramap_fst
map_snd
left
type ('a, 'b) t
The type held by the Choice Profunctor.
Choice Profunctor
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) Stdlib.Either.t, ('b, 'c) Stdlib.Either.t) t
Act on the left parameter of the sum.