Set(3) OCaml library Set(3) NAME Set - Sets over ordered types. Module Module Set Documentation Module Set : sig end Sets over ordered types. This module implements the set data structure, given a total ordering function over the set elements. All operations over sets are purely applicative (no side-effects). The implementation uses balanced binary trees, and is therefore reasonably efficient: insertion and membership take time logarithmic in the size of the set, for instance. The Set.Make functor constructs implementations for any type, given a compare function. For instance: module IntPairs = struct type t = int * int let compare (x0,y0) (x1,y1) = match Stdlib.compare x0 x1 with 0 -> Stdlib.compare y0 y1 | c -> c end module PairsSet = Set.Make(IntPairs) let m = PairsSet.(empty |> add (2,3) |> add (5,7) |> add (11,13)) This creates a new module PairsSet , with a new type PairsSet.t of sets of int * int . module type OrderedType = sig end Input signature of the functor Set.Make . module type S = sig end Output signature of the functor Set.Make . module Make : functor (Ord : OrderedType) -> sig end Functor building an implementation of the set structure given a totally ordered type. OCamldoc 2024-02-29 Set(3)