Module MoreLabels.Set

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 MoreLabels.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

module type S = sig .. end

module Make: 
functor (Ord : OrderedType) -> S 
    with type elt = Ord.t
     and type t = Set.Make(Ord).t