Module type Arrow_choice.WITH_LEFT

Minimal definition using left operation without Arrow.

type ('a, 'b) t

The type held by the Arrow_choice.

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

Feed marked inputs through the argument arrow, passing the rest through unchanged to the output.