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.