package astring

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String sets

package astring

astring
- Astring
  - Char
    
    Ascii
  - String
    
    Ascii
    
    Map
    
    Set
    
    Sub

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Parameter
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Class type

String sets.

String sets

include Set.S with type elt := string and type t := set

val empty : set

The empty set.

val is_empty : set -> bool

Test whether a set is empty or not.

val mem : string -> set -> bool

mem x s tests whether x belongs to the set s.

val add : string -> set -> set

add x s returns a set containing all elements of s, plus x. If x was already in s, s is returned unchanged (the result of the function is then physically equal to s).

before 4.03
Physical equality was not ensured.

val singleton : string -> set

singleton x returns the one-element set containing only x.

val remove : string -> set -> set

remove x s returns a set containing all elements of s, except x. If x was not in s, s is returned unchanged (the result of the function is then physically equal to s).

before 4.03
Physical equality was not ensured.

val union : set -> set -> set

Set union.

val inter : set -> set -> set

Set intersection.

val diff : set -> set -> set

Set difference.

val compare : set -> set -> int

Total ordering between sets. Can be used as the ordering function for doing sets of sets.

val equal : set -> set -> bool

equal s1 s2 tests whether the sets s1 and s2 are equal, that is, contain equal elements.

val subset : set -> set -> bool

subset s1 s2 tests whether the set s1 is a subset of the set s2.

val iter : (string -> unit) -> set -> 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 : (string -> string) -> set -> set

map f s is the set whose elements are f a0,f a1... f aN, where a0,a1...aN are the elements of s.

The elements are passed to f in increasing order with respect to the ordering over the type of the elements.

If no element of s is changed by f, s is returned unchanged. (If each output of f is physically equal to its input, the returned set is physically equal to s.)

val fold : (string -> 'a -> 'a) -> set -> 'a -> 'a

fold f s a computes (f xN ... (f x2 (f x1 a))...), where x1 ... xN are the elements of s, in increasing order.

val for_all : (string -> bool) -> set -> bool

for_all p s checks if all elements of the set satisfy the predicate p.

val exists : (string -> bool) -> set -> bool

exists p s checks if at least one element of the set satisfies the predicate p.

val filter : (string -> bool) -> set -> set

filter p s returns the set of all elements in s that satisfy predicate p. If p satisfies every element in s, s is returned unchanged (the result of the function is then physically equal to s).

before 4.03
Physical equality was not ensured.

val partition : (string -> bool) -> set -> set * set

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.

val cardinal : set -> int

Return the number of elements of a set.

val elements : set -> string list

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.

val split : string -> set -> set * bool * set

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.

type t = set

val min_elt : set -> string option

Exception safe Set.S.min_elt.

val get_min_elt : set -> string

get_min_elt is like min_elt but

raises Invalid_argument
on the empty set.

val max_elt : set -> string option

Exception safe Set.S.max_elt.

val get_max_elt : set -> string

get_max_elt is like max_elt but

raises Invalid_argument
on the empty set.

val choose : set -> string option

Exception safe Set.S.choose.

val get_any_elt : set -> string

get_any_elt is like choose but

raises Invalid_argument
on the empty set.

val find : string -> set -> string option

Exception safe Set.S.find.

val get : string -> set -> string

get is like Set.S.find but

raises Invalid_argument
if elt is not in s.

val of_list : string list -> set

of_list ss is a set from the list ss.

val pp : 
  ?sep:(Format.formatter -> unit -> unit) ->
  (Format.formatter -> string -> unit) ->
  Format.formatter ->
  set ->
  unit

pp ~sep pp_elt ppf ss formats the elements of ss on ppf. Each element is formatted with pp_elt and elements are separated by ~sep (defaults to Format.pp_print_cut. If the set is empty leaves ppf untouched.

val dump : Format.formatter -> set -> unit

dump ppf ss prints an unspecified representation of ss on ppf.