NAME

       Map - Association tables over ordered types.

Module

       Module   Map

Documentation

       Module Map
        : sig end

       Association tables over ordered types.

       This  module  implements  applicative  association  tables,  also  known as finite maps or
       dictionaries, given a total ordering function over the keys.  All operations over maps are
       purely  applicative (no side-effects).  The implementation uses balanced binary trees, and
       therefore searching and insertion take time logarithmic in the size of the map.

       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 PairsMap = Map.Make(IntPairs)

            let m = PairsMap.(empty |> add (0,1) "hello" |> add (1,0) "world")

       This creates a new module PairsMap , with a new type 'a PairsMap.t of maps from int *  int
       to 'a . In this example, m contains string values so its type is string PairsMap.t .

       module type OrderedType = sig end

       Input signature of the functor Map.Make .

       module type S = sig end

       Output signature of the functor Map.Make .

       module Make : functor (Ord : OrderedType) -> sig end

       Functor building an implementation of the map structure given a totally ordered type.