Over_profunctor_via_left.L
type ('a, 'b) t = ('a, 'b) P.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.