focal (3) Map.3o.gz

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.