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Module type Focused

Many functions in Either focus on just one constructor. The Focused signature abstracts over which constructor is the focus. To use these functions, use the First or Second modules in S.

Signature

type (+'focus, +'other) t
include Monad.S2 with type ('a, 'b) t := ('a, 'b) t
type ('a, 'e) t
include Monad_intf.Infix2 with type ('a, 'e) t := ('a, 'e) t
type ('a, 'e) t
val (>>=) : ('a, 'e) t -> ('a -> ('b, 'e) t) -> ('b, 'e) t
val (>>|) : ('a, 'e) t -> ('a -> 'b) -> ('b, 'e) t
include Monad_intf.Syntax2 with type ('a, 'e) t := ('a, 'e) t
type ('a, 'e) t
module Let_syntax : sig .. end
module Monad_infix : Monad_intf.Infix2 with type ('a, 'e) t := ('a, 'e) t
val bind : ('a, 'e) t -> ('a -> ('b, 'e) t) -> ('b, 'e) t
val return : 'a -> ('a, _) t
val map : ('a, 'e) t -> f:('a -> 'b) -> ('b, 'e) t
val join : (('a, 'e) t, 'e) t -> ('a, 'e) t
val ignore_m : (_, 'e) t -> (unit, 'e) t
val all : ('a, 'e) t list -> ('a list, 'e) t
val all_ignore : (unit, 'e) t list -> (unit, 'e) t
include Applicative.S2 with type ('a, 'b) t := ('a, 'b) t
type ('a, 'e) t
val return : 'a -> ('a, _) t
val apply : ('a -> 'b, 'e) t -> ('a, 'e) t -> ('b, 'e) t
val map : ('a, 'e) t -> f:('a -> 'b) -> ('b, 'e) t
val map2 : ('a, 'e) t -> ('b, 'e) t -> f:('a -> 'b -> 'c) -> ('c, 'e) t
val map3 : ('a, 'e) t -> ('b, 'e) t -> ('c, 'e) t -> f:('a -> 'b -> 'c -> 'd) -> ('d, 'e) t
val all : ('a, 'e) t list -> ('a list, 'e) t
val both : ('a, 'e) t -> ('b, 'e) t -> ('a * 'b, 'e) t
module Applicative_infix : sig .. end
include module type of Applicative_infix
val (<*>) : ('a -> 'b, 'e) t -> ('a, 'e) t -> ('b, 'e) t
val (<*) : ('a, 'e) t -> (unit, 'e) t -> ('a, 'e) t
val (*>) : (unit, 'e) t -> ('a, 'e) t -> ('a, 'e) t
include Container.S1_phantom with type ('a, 'b) t := ('a, 'b) t
type ('a, +'phantom) t
include Container_intf.S1_phantom_invariant with type ('a, 'phantom) t := ('a, 'phantom) t
type ('a, 'phantom) t
val mem : ?equal:('a -> 'a -> bool) -> ('a, _) t -> 'a -> bool

Checks whether the provided element is there, using polymorphic compare if equal is not provided

val length : (_, _) t -> int
val is_empty : (_, _) t -> bool
val iter : ('a, _) t -> f:('a -> unit) -> unit
val fold : ('a, _) t -> init:'accum -> f:('accum -> 'a -> 'accum) -> 'accum

fold t ~init ~f returns f (... f (f (f init e1) e2) e3 ...) en, where e1..en are the elements of t

val exists : ('a, _) t -> f:('a -> bool) -> bool

Returns true if and only if there exists an element for which the provided function evaluates to true. This is a short-circuiting operation.

val for_all : ('a, _) t -> f:('a -> bool) -> bool

Returns true if and only if the provided function evaluates to true for all elements. This is a short-circuiting operation.

val count : ('a, _) t -> f:('a -> bool) -> int

Returns the number of elements for which the provided function evaluates to true.

val sum : (module Commutative_group.S with type t = 'sum) -> ('a, _) t -> f:('a -> 'sum) -> 'sum

Returns the sum of f i for i in the container

val find : ('a, _) t -> f:('a -> bool) -> 'a option

Returns as an option the first element for which f evaluates to true.

val find_map : ('a, _) t -> f:('a -> 'b option) -> 'b option

Returns the first evaluation of f that returns Some, and returns None if there is no such element.

val to_list : ('a, _) t -> 'a list
val to_array : ('a, _) t -> 'a array
val min_elt : ('a, _) t -> cmp:('a -> 'a -> int) -> 'a option

Returns a min (resp max) element from the collection using the provided cmp function. In case of a tie, the first element encountered while traversing the collection is returned. The implementation uses fold so it has the same complexity as fold. Returns None iff the collection is empty.

val max_elt : ('a, _) t -> cmp:('a -> 'a -> int) -> 'a option
module Args : Applicative.Args2 with type ('a, 'e) arg := ('a, 'e) t
val value : ('a, _) t -> default:'a -> 'a
val to_option : ('a, _) t -> 'a option
val with_return : ('a With_return.return -> 'b) -> ('a, 'b) t
val combine : ('a, 'd) t -> ('b, 'd) t -> f:('a -> 'b -> 'c) -> other:('d -> 'd -> 'd) -> ('c, 'd) t
val combine_all : ('a, 'b) t list -> f:('b -> 'b -> 'b) -> ('a list, 'b) t
val combine_all_unit : (unit, 'b) t list -> f:('b -> 'b -> 'b) -> (unit, 'b) t