package preface

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

The type held by the Arrow_choice.

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

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

val arrow : ('a -> 'b) -> ('a, 'b) t

Lift a function to an Arrow.

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

Split the input between the two given Arrows and combine their output.