val empty : tThe empty set.
val is_empty : t -> boolTest whether a set is empty or not.
val is_singleton : t -> boolTest if the set is a singleton.
find x s returns the element in s that tests equal to x under its comparison function.
find_opt x s returns Some k for the element k in s that tests equal to x under its comparison function. If no element is equal, return None
find_first f m returns the first element e for which f e is true or raises Not_found if there is no such element. f must be monotonically increasing, i.e. if k1 < k2 && f k1 is true then f k2 must also be true.
find_first_opt f m returns Some e for the first element e for which f e is true or returns None if there is no such element. f must be monotonically increasing, i.e. if k1 < k2 && f k1 is true then f k2 must also be true.
find_last f m returns the last element e for which f e is true or raises Not_found if there is no such element. f must be monotonically decreasing, i.e. if k1 < k2 && f k2 is true then f k1 must also be true.
find_last_opt f m returns Some e for the last element e for which f e is true or returns None if there is no such element. f must be monotonically decreasing, i.e. if k1 < k2 && f k2 is true then f k1 must also be true.
add x s returns a set containing all elements of s, plus x. If x was already in s, s is returned unchanged.
remove x s returns a set containing all elements of s, except x. If x was not in s, s is returned unchanged.
remove_exn x s behaves like remove x s except that it raises an exception if x is not in s.
update x y s replace x by y in s. update is faster when x compares equal to y according to the comparison function used by your set. When x and y are physically equal, m is returned unchanged.
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).
Total ordering between sets. Can be used as the ordering function for doing sets of sets.
equal s1 s2 tests whether the sets s1 and s2 are equal, that is, contain equal elements.
disjoint s1 s2 tests whether the sets s1 and s2 contain no shared elements. (i.e. inter s1 s2 is empty.)
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.
at_rank_exn i s returns element at rank i in s, that is the i-th element in increasing order (the 0-th element being the smallest element of s).
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
if f returns all elements unmodified then x is returned unmodified.
filter p s returns the set of all elements in s that satisfy predicate p.
if p returns true for all elements then s is returned unmodified.
filter_map f m combines the features of filter and map. It calls f a0, f a1, f aN where a0,a1..aN are the elements of m and returns the set of elements bi such as f ai = Some bi (when f returns None, the corresponding element of m is discarded).
if f returns true for all elements then s is returned unmodified.
fold f s a computes (f xN ... (f x1 (f x0 a))...), where x0,x1..xN are the elements of s, in increasing order.
for_all p s checks if all elements of the set satisfy the predicate p.
exists p s checks if at least one element of the set satisfies the predicate p.
partition p s returns a pair of sets (s1, s2), where s1 is the set of all the elements of s that satisfy the predicate p, and s2 is the set of all the elements of s that do not satisfy p.
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.
split_opt x s returns a triple (l, maybe_v, 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; maybe_v is None if s contains no element equal to x, or Some v if s contains an element v that compares equal to x.
split_lt x s returns a pair of sets (l, r), such that l is the subset of s with elements < x; r is the subset of s with elements >= x.
split_le x s returns a pair of sets (l, r), such that l is the subset of s with elements <= x; r is the subset of s with elements > x.
val cardinal : t -> intReturn the number of elements of a set.
Return the list of all elements of the given set. The returned list is sorted in increasing order with respect to the ordering Ord.compare, where Ord is the argument given to Set.Make.
Return the smallest element of the given set (with respect to the Ord.compare ordering).
Return Some e for the smallest element e of the given set (with respect to the Ord.compare ordering). Return None if the set is empty.
Returns the smallest element of the given set along with the rest of the set. Semantically equivalent and faster than
let mini = min_elt s in (mini, remove mini s)
Returns the biggest element of the given set along with the rest of the set. Semantically equivalent and faster than
let maxi = max_elt s in (maxi, remove maxi s)
Same as Set.S.min_elt, but returns the largest element of the given set.
Same as Set.S.min_elt_opt, but for the largest element of the given set.
Return one element of the given set. Which element is chosen is unspecified, but equal elements will be chosen for equal sets.
Return Some e for one element e of the given set. Which element is chosen is unspecified, but equal elements will be chosen for equal sets. Return None if the set is empty.
Return one element of the given set. The difference with choose is that there is no guarantee that equals elements will be picked for equal sets. This merely returns the quickest element to get (O(1)).
Return an enumeration of all elements of the given set. The returned enumeration is sorted in increasing order with respect to the ordering Ord.compare, where Ord is the argument given to Set.Make.
Return an enumeration of all elements of the given set. The returned enumeration is sorted in decreasing order with respect to the ordering Ord.compare, where Ord is the argument given to Set.Make.
to_seq_from x s iterates on a subset of the elements in s, namely those greater or equal to x, in ascending order.
val print :
?first:string ->
?last:string ->
?sep:string ->
('a BatInnerIO.output -> elt -> unit) ->
'a BatInnerIO.output ->
t ->
unitThe following modules replace functions defined in Set with functions behaving slightly differently but having the same name. This is by design: the functions meant to override the corresponding functions of Set.
module Exceptionless : sig ... endOperations on Set without exceptions.