Module Owl_utils_multimap.Make


module Ord : Stdlib.Map.OrderedType


Type definition
type key = Ord.t

Type of the multimap keys.

type 'a t

Type of a multimap.

Basic functions
val empty : 'a t

The empty multimap.

val is_empty : 'a t -> bool

Check whether the multimap is empty.

val mem : key -> 'a t -> bool

mem k m returns true is the multimap m contains at least one binding for k, false otherwise.

val add : key -> 'a -> 'a t -> 'a t

add k v m returns a multimap containing the same bindings as m, plus a binding from k to v. Previous bindings for k are hidden by the new binding (they can be restored by calling remove k m).

val remove : key -> 'a t -> 'a t

remove k v m returns a multimap with the same bindings as m, except for the binding of k: the last value that was bound to it is removed. If there is no binding for k in m, raises `Not_found`.

val find : key -> 'a t -> 'a

find k m returns the last added binding of k in m, or raises Not_found if there is no such binding.

val max_binding : 'a t -> key * 'a

max_binding m returns the greatest binding in m. Raises Not_found if m is empty.

val find_first_opt : (key -> bool) -> 'a t -> (key * 'a) option

find_first_opt f m returns the first binding (k, v) such that f k, or None if no such binding exists. The function f has to be nondecreasing. Time complexity is O(log n).