module type S = sig .. end
type
The type of the map keys.
type +'a t
The type of maps from type key to type 'a.
val empty : 'a t
The empty map.
val is_empty : 'a t -> bool
Test whether a map is empty or not.
val add : key -> 'a -> 'a t -> 'a t
add x y m returns a map containing the same bindings as
m, plus a binding of x to y. If x was already bound
in m, its previous binding disappears.
val find : key -> 'a t -> 'a
find x m returns the current binding of x in m,
or raises Not_found if no such binding exists.
val remove : key -> 'a t -> 'a t
remove x m returns a map containing the same bindings as
m, except for x which is unbound in the returned map.
val mem : key -> 'a t -> bool
mem x m returns true if m contains a binding for x,
and false otherwise.
val iter : (key -> 'a -> unit) -> 'a t -> unit
iter f m applies f to all bindings in map m.
f receives the key as first argument, and the associated value
as second argument. The bindings are passed to f in increasing
order with respect to the ordering over the type of the keys.
Only current bindings are presented to f:
bindings hidden by more recent bindings are not passed to f.
val map : ('a -> 'b) -> 'a t -> 'b t
map f m returns a map with same domain as m, where the
associated value a of all bindings of m has been
replaced by the result of the application of f to a.
The bindings are passed to f in increasing order
with respect to the ordering over the type of the keys.
val mapi : (key -> 'a -> 'b) -> 'a t -> 'b t
Same as Map.S.map, but the function receives as arguments both the
key and the associated value for each binding of the map.
val fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
fold f m a computes (f kN dN ... (f k1 d1 a)...),
where k1 ... kN are the keys of all bindings in m
(in increasing order), and d1 ... dN are the associated data.
val filter : ('a -> bool) -> 'a t -> 'a t
filter f m returns a map where only the values a of m
such that f a = true remain. The bindings are passed to f
in increasing order with respect to the ordering over the
type of the keys.
val filteri : (key -> 'a -> bool) -> 'a t -> 'a t
filter f m returns a map where only the key, values pairs
key, a of m such that f key a = true remain. The
bindings are passed to f in increasing order with respect
to the ordering over the type of the keys.
val filter_map : (key -> 'a -> 'b option) -> 'a t -> 'b t
filter_map f m combines the features of filteri and
map. It calls calls f key0 a0, f key1 a1, f keyn an
where a0..an are the elements of m and key0..keyn the
respective corresponding keys. It returns the map of
pairs keyi,bi such as f keyi ai = Some bi (when f returns
None, the corresponding element of m is discarded).
val compare : ('a -> 'a -> int) -> 'a t -> 'a t -> int
Total ordering between maps. The first argument is a total ordering
used to compare data associated with equal keys in the two maps.
val equal : ('a -> 'a -> bool) -> 'a t -> 'a t -> bool
equal cmp m1 m2 tests whether the maps m1 and m2 are
equal, that is, contain equal keys and associate them with
equal data. cmp is the equality predicate used to compare
the data associated with the keys.
val keys : 'a t -> key BatEnum.t
Return an enumeration of all the keys of a map.
val values : 'a t -> 'a BatEnum.t
Return an enumeration of al the values of a map.
val choose : 'a t -> key * 'a
return an implementation defined (key,value) pair. As Set.choose
val enum : 'a t -> (key * 'a) BatEnum.t
Return an enumeration of (key, value) pairs of a map.
val of_enum : (key * 'a) BatEnum.t -> 'a t
Create a map from a (key, value) enumeration.
Boilerplate code
Printing
val print : ?first:string ->
?last:string ->
?sep:string ->
('a BatInnerIO.output -> key -> unit) ->
('a BatInnerIO.output -> 'b -> unit) ->
'a BatInnerIO.output -> 'b t -> unit
Output signature of the functor Map.Make.
Override modules
The following modules replace functions defined in Map with functions
behaving slightly differently but having the same name. This is by design:
the functions meant to override the corresponding functions of Map.
module Exceptionless: sig .. end
Operations on Map without exceptions.
module Labels: sig .. end
Operations on Map with labels.