package stdune

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package stdune
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Module Commutative.UnitSource

The trivial commutative monoid with empty = () and combine () () = ().

Sourcetype t = Unit.t
Sourceval empty : t

Must be the identity of combine:

  • combine empty t = t
  • combine t empty = t
Sourceval combine : t -> t -> t

Must be associative:

  • combine a (combine b c) = combine (combine a b) c
Sourcemodule O : sig ... end
Sourceval reduce : t list -> t
Sourceval map_reduce : f:('a -> t) -> 'a list -> t
Sourcetype combine_is_commutative = unit
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