username_kernel v0.17.0 (latest)

type key = t

val length : ('a, 'b) Core.Hash_queue.t -> int

val is_empty : ('a, 'b) Core.Hash_queue.t -> bool

val iter : ('b, 'a) Core.Hash_queue.t -> f:('a -> unit) -> unit

val fold : 
  ('b, 'a) Core.Hash_queue.t ->
  init:'acc ->
  f:('acc -> 'a -> 'acc) ->
  'acc

val fold_result : 
  ('b, 'a) Core.Hash_queue.t ->
  init:'acc ->
  f:('acc -> 'a -> ('acc, 'e) Base__.Result.t) ->
  ('acc, 'e) Base__.Result.t

val fold_until : 
  ('b, 'a) Core.Hash_queue.t ->
  init:'acc ->
  f:('acc -> 'a -> ('acc, 'final) Base__Container_intf.Continue_or_stop.t) ->
  finish:('acc -> 'final) ->
  'final

val exists : ('b, 'a) Core.Hash_queue.t -> f:('a -> bool) -> bool

val for_all : ('b, 'a) Core.Hash_queue.t -> f:('a -> bool) -> bool

val count : ('b, 'a) Core.Hash_queue.t -> f:('a -> bool) -> int

val sum : 
  (module Base__Container_intf.Summable with type t = 'sum) ->
  ('b, 'a) Core.Hash_queue.t ->
  f:('a -> 'sum) ->
  'sum

val find : ('b, 'a) Core.Hash_queue.t -> f:('a -> bool) -> 'a option

val find_map : ('c, 'a) Core.Hash_queue.t -> f:('a -> 'b option) -> 'b option

val to_list : ('b, 'a) Core.Hash_queue.t -> 'a list

val to_array : ('b, 'a) Core.Hash_queue.t -> 'a array

val min_elt : 
  ('b, 'a) Core.Hash_queue.t ->
  compare:('a -> 'a -> int) ->
  'a option

val max_elt : 
  ('b, 'a) Core.Hash_queue.t ->
  compare:('a -> 'a -> int) ->
  'a option

invariant t checks the invariants of the queue.

val invariant : ('key, 'data) Core.Hash_queue.t -> Base.Unit.t

val create : 
  ?growth_allowed:Base.Bool.t ->
  ?size:Base.Int.t ->
  Base.Unit.t ->
  (key, 'data) Core.Hash_queue.t

create () returns an empty queue. The arguments growth_allowed and size are referring to the underlying hashtable.

parameter growth_allowed
defaults to true

parameter size
initial size -- default to 16

val clear : ('key, 'data) Core.Hash_queue.t -> Base.Unit.t

Clears the queue.

val copy : ('key, 'data) Core.Hash_queue.t -> ('key, 'data) Core.Hash_queue.t

Makes a fresh copy of the queue with identical contents to the original.

Finding elements

val mem : ('key, 'data) Core.Hash_queue.t -> 'key -> Base.Bool.t

mem q k returns true iff there is some (k, v) in the queue.

val lookup : ('key, 'data) Core.Hash_queue.t -> 'key -> 'data Base.Option.t

lookup t k returns the value of the key-value pair in the queue with key k, if there is one.

val lookup_exn : ('key, 'data) Core.Hash_queue.t -> 'key -> 'data

Adding, removing, and replacing elements

Note that even the non-*_exn versions can raise, but only if there is an ongoing iteration.

val enqueue : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'key ->
  'data ->
  [ `Ok | `Key_already_present ]

enqueue t back_or_front k v adds the key-value pair (k, v) to the front or back of the queue, returning `Ok if the pair was added, or `Key_already_present if there is already a (k, v') in the queue.

val enqueue_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'key ->
  'data ->
  Base.Unit.t

Like enqueue, but it raises in the `Key_already_present case

val enqueue_back : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  [ `Ok | `Key_already_present ]

See enqueue. enqueue_back t k v is the same as enqueue t `back k v

val enqueue_back_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  Base.Unit.t

See enqueue_exn. enqueue_back_exn t k v is the same as enqueue_exn t `back k v

val enqueue_front : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  [ `Ok | `Key_already_present ]

See enqueue. enqueue_front t k v is the same as enqueue t `front k v

val enqueue_front_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  Base.Unit.t

See enqueue_exn. enqueue_front_exn t k v is the same as enqueue_exn t `front k v

val lookup_and_move_to_back : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data Base.Option.t

lookup_and_move_to_back finds the key-value pair (k, v) and moves it to the back of the queue if it exists, otherwise returning None.

The _exn versions of these functions raise if key-value pair does not exist.

val lookup_and_move_to_back_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data

Like lookup_and_move_to_back, but raises instead of returning an option

val lookup_and_move_to_front : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data Base.Option.t

Like lookup_and_move_to_back, but moves element to the front of the queue

val lookup_and_move_to_front_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data

Like lookup_and_move_to_front, but raises instead of returning an option

val last : ('key, 'data) Core.Hash_queue.t -> 'data Base.Option.t

last t returns the last element of the queue, without removing it.

val last_with_key : 
  ('key, 'data) Core.Hash_queue.t ->
  ('key * 'data) Base.Option.t

last_with_key t returns the last element of the queue and its key, without removing it.

val first : ('key, 'data) Core.Hash_queue.t -> 'data Base.Option.t

first t returns the front element of the queue, without removing it.

val first_with_key : 
  ('key, 'data) Core.Hash_queue.t ->
  ('key * 'data) Base.Option.t

first_with_key t returns the front element of the queue and its key, without removing it.

val keys : ('key, 'data) Core.Hash_queue.t -> 'key Base.List.t

keys t returns the keys in the order of the queue.

val to_alist : ('key, 'data) Core.Hash_queue.t -> ('key * 'data) Base.List.t

to_alist t returns the elements of the queue with their keys in the order of the queue.

val dequeue : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'data Base.Option.t

dequeue t front_or_back returns the front or back element of the queue.

val dequeue_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'data

Like dequeue, but it raises if the queue is empty.

val dequeue_back : ('key, 'data) Core.Hash_queue.t -> 'data Base.Option.t

dequeue_back t returns the back element of the queue.

val dequeue_back_exn : ('key, 'data) Core.Hash_queue.t -> 'data

Like dequeue_back, but it raises if the queue is empty.

val dequeue_front : ('key, 'data) Core.Hash_queue.t -> 'data Base.Option.t

dequeue_front t returns the front element of the queue.

val dequeue_front_exn : ('key, 'data) Core.Hash_queue.t -> 'data

Like dequeue_front, but it raises if the queue is empty.

val dequeue_with_key : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  ('key * 'data) Base.Option.t

dequeue_with_key t returns the front or back element of the queue and its key.

val dequeue_with_key_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'key * 'data

Like dequeue_with_key, but it raises if the queue is empty.

val dequeue_back_with_key : 
  ('key, 'data) Core.Hash_queue.t ->
  ('key * 'data) Base.Option.t

dequeue_back_with_key t returns the back element of the queue and its key.

val dequeue_back_with_key_exn : ('key, 'data) Core.Hash_queue.t -> 'key * 'data

Like dequeue_back_with_key, but it raises if the queue is empty.

val dequeue_front_with_key : 
  ('key, 'data) Core.Hash_queue.t ->
  ('key * 'data) Base.Option.t

dequeue_front_with_key t returns the front element of the queue and its key.

val dequeue_front_with_key_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key * 'data

Like dequeue_front_with_key, but it raises if the queue is empty.

val dequeue_all : 
  ('key, 'data) Core.Hash_queue.t ->
  f:('data -> Base.Unit.t) ->
  Base.Unit.t

dequeue_all t ~f dequeues every element of the queue and applies f to each one. The dequeue order is from front to back.

val remove : ('key, 'data) Core.Hash_queue.t -> 'key -> [ `Ok | `No_such_key ]

remove q k removes the key-value pair with key k from the queue.

val remove_exn : ('key, 'data) Core.Hash_queue.t -> 'key -> Base.Unit.t

val lookup_and_remove : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data Base.Option.t

like remove, but returns the removed element

val replace : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  [ `Ok | `No_such_key ]

replace q k v changes the value of key k in the queue to v.

val replace_or_enqueue : 
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  'key ->
  'data ->
  Base.Unit.t

replace_or_enqueue q back_or_front k v changes the value of key k in the queue to v. If the key k does not exist in the queue, it is added to the front or back with the value v.

val replace_or_enqueue_front : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  Base.Unit.t

See replace_or_enqueue. replace_or_enqueue_front t k v is the same as replace_or_enqueue t `front k v

val replace_or_enqueue_back : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  Base.Unit.t

See replace_or_enqueue. replace_or_enqueue_back t k v is the same as replace_or_enqueue t `back k v

val replace_exn : 
  ('key, 'data) Core.Hash_queue.t ->
  'key ->
  'data ->
  Base.Unit.t

val drop : 
  ?n:Base.Int.t ->
  ('key, 'data) Core.Hash_queue.t ->
  [ `back | `front ] ->
  Base.Unit.t

drop ?n q back_or_front drops n elements (default 1) from the back or front of the queue. If the queue has fewer than n elements then it is cleared.

val drop_front : 
  ?n:Base.Int.t ->
  ('key, 'data) Core.Hash_queue.t ->
  Base.Unit.t

Equivalent to drop ?n q `front.

val drop_back : ?n:Base.Int.t -> ('key, 'data) Core.Hash_queue.t -> Base.Unit.t

Equivalent to drop ?n q `back.

Iterating over elements

val iteri : 
  ('key, 'data) Core.Hash_queue.t ->
  f:(key:'key -> data:'data -> Base.Unit.t) ->
  Base.Unit.t

iter t ~f applies f to each key and element of the queue.

val foldi : 
  ('key, 'data) Core.Hash_queue.t ->
  init:'acc ->
  f:('acc -> key:'key -> data:'data -> 'acc) ->
  'acc

type 'data t = (key, 'data) Core.Hash_queue.t

val sexp_of_t : ('data -> Sexplib0.Sexp.t) -> 'data t -> Sexplib0.Sexp.t

package username_kernel

Finding elements

Adding, removing, and replacing elements

Iterating over elements