package preface

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

The type held by the Arrow_zero.

val neutral : ('a, 'b) t

The neutral element of the Arrow_zero.

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.