module PSet:sig
..end
The definitions below describe the polymorphic set interface.
They are similar in functionality to the functorized
BatSet.Make
module, but the compiler cannot ensure that sets
using different element ordering have different types: the
responsibility of not mixing non-sensical comparison functions
together is to the programmer. If you ever need a custom
comparison function, it is recommended to use the BatSet.Make
functor for additional safety.
type 'a
t
include BatEnum.Enumerable
include BatInterfaces.Mappable
val empty : 'a t
compare
as comparison functionval create : ('a -> 'a -> int) -> 'a t
val is_empty : 'a t -> bool
val singleton : ?cmp:('a -> 'a -> int) -> 'a -> 'a t
val mem : 'a -> 'a t -> bool
mem x s
tests whether x
belongs to the set s
.val add : 'a -> 'a t -> 'a t
add x s
returns a set containing all elements of s
,
plus x
. If x
was already in s
, s
is returned unchanged.val remove : 'a -> 'a t -> 'a t
remove x s
returns a set containing all elements of s
,
except x
. If x
was not in s
, s
is returned unchanged.val union : 'a t -> 'a t -> 'a t
union s t
returns the union of s
and t
- the set containing
all elements in either s
and t
. The returned set uses t
's
comparison function. The current implementation works better for
small s
.val intersect : 'a t -> 'a t -> 'a t
intersect s t
returns a new set of those elements that are in
both s
and t
. The returned set uses s
's comparison function.val diff : 'a t -> 'a t -> 'a t
diff s t
returns the set of all elements in s
but not in
t
. The returned set uses s
's comparison function.val sym_diff : 'a t -> 'a t -> 'a t
sym_diff s t
returns the set of all elements in s
or t
but not both.
This is the same as diff (union s t) (inter s t)
. The returned set uses
s
's comparison function.val compare : 'a t -> 'a t -> int
val equal : 'a t -> 'a t -> bool
equal s1 s2
tests whether the sets s1
and s2
are
equal, that is, contain equal elements.val subset : 'a t -> 'a t -> bool
subset a b
returns true if a
is a subset of b
. O(|a|).val disjoint : 'a t -> 'a t -> bool
disjoint s1 s2
tests whether the sets s1
and s2
contain no
shared elements. (i.e. inter s1 s2
is empty.)val iter : ('a -> unit) -> 'a t -> unit
iter f s
applies f
in turn to all elements of s
.
The elements of s
are presented to f
in increasing order
with respect to the ordering over the type of the elements.val map : ('a -> 'b) -> 'a t -> 'b t
map f x
creates a new set with elements f a0
,
f a1
... f aN
, where a0
, a1
, ..., aN
are the
values contained in x
The resulting map uses the polymorphic compare
function to
order elements.
val filter : ('a -> bool) -> 'a t -> 'a t
filter p s
returns the set of all elements in s
that satisfy predicate p
.val filter_map : ('a -> 'b option) -> 'a t -> 'b t
filter_map f m
combines the features of filter
and
map
. It calls calls f a0
, f a1
, f aN
where a0,a1..an
are the elements of m
and returns the set of pairs bi
such as f ai = Some bi
(when f
returns None
, the
corresponding element of m
is discarded).
The resulting map uses the polymorphic compare
function to
order elements.
val fold : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b
fold f s a
computes (f xN ... (f x1 (f x0 a))...)
,
where x0,x1..xN
are the elements of s
, in increasing order.val exists : ('a -> bool) -> 'a t -> bool
exists p s
checks if at least one element of
the set satisfies the predicate p
.val for_all : ('a -> bool) -> 'a t -> bool
val partition : ('a -> bool) -> 'a t -> 'a t * 'a t
val split : 'a -> 'a t -> 'a t * bool * 'a t
split x s
returns a triple (l, present, r)
, where
l
is the set of elements of s
that are
strictly less than x
;
r
is the set of elements of s
that are
strictly greater than x
;
present
is false
if s
contains no element equal to x
,
or true
if s
contains an element equal to x
.val cardinal : 'a t -> int
val elements : 'a t -> 'a list
val min_elt : 'a t -> 'a
Invalid_argument
if given an empty set.val max_elt : 'a t -> 'a
Invalid_argument
if given an empty set.val choose : 'a t -> 'a
Invalid_argument
if given an empty set.val pop : 'a t -> 'a * 'a t
Not_found
if given an empty setval enum : 'a t -> 'a BatEnum.t
val of_enum : 'a BatEnum.t -> 'a t
val of_enum_cmp : cmp:('a -> 'a -> int) -> 'a BatEnum.t -> 'a t
val of_list : 'a list -> 'a t
val print : ?first:string ->
?last:string ->
?sep:string ->
('a BatInnerIO.output -> 'c -> unit) ->
'a BatInnerIO.output -> 'c t -> unit
val get_cmp : 'a t -> 'a -> 'a -> int