Choice.WITH_LEFT
Minimal interface using left and without Profunctor.
left
Profunctor
type ('a, 'b) t
The type held by the Choice Profunctor.
Choice Profunctor
val left : ('a, 'b) t -> (('a, 'c) Stdlib.Either.t, ('b, 'c) Stdlib.Either.t) t
Act on the left parameter of the sum.