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lsp.stdune
Monoid.String
The string concatenation monoid with empty = "" and combine = ( ^ ).
empty = ""
combine = ( ^ )
type t = string
val empty : t
Must be the identity of combine:
combine
val combine : t -> t -> t
Must be associative:
module O : sig ... end
val reduce : t list -> t
val map_reduce : f:('a -> t) -> 'a list -> t