| Value | Description |
|---|
val bind : ('a -> 'b option) -> 'a option -> 'b option |
"bind f inp" evaluates to "match inp with None -> None | Some x -> f x"
|
val exists : ('a -> bool) -> 'a option -> bool |
"exists p inp" evaluates to "match inp with None -> false | Some x -> p x"
|
val filter : ('a -> bool) -> 'a option -> 'a option |
"filter p inp" evaluates to "match inp with None -> None | Some x -> if p x then inp else None"
|
val fold_left : ('b -> 'a -> 'b) -> 'b -> 'a option -> 'b |
"nonempty inp" evaluates to "match inp with None -> false | Some _ -> true"
"fold_left f s inp " evaluates to "match inp with None -> s | Some x -> f s x"
|
val fold_right : ('a -> 'b -> 'b) -> 'a option -> 'b -> 'b |
"fold_right f inp s" evaluates to "match inp with None -> s | Some x -> f x s"
|
val for_all : ('a -> bool) -> 'a option -> bool |
"forall p inp" evaluates to "match inp with None -> true | Some x -> p x"
|
val get : 'a option -> 'a |
Gets the value associated with the option. If the option is None then
raises Invalid_argument "Option.get"
|
val is_none : 'a option -> bool |
Returns true if the option is None
|
val is_some : 'a option -> bool |
Returns true if the option is not None
|
val iter : ('a -> unit) -> 'a option -> unit |
"iter f inp" executes "match inp with None -> () | Some x -> f x"
|
val length : 'a option -> int |
"length inp" evaluates to "match inp with None -> 0 | Some _ -> 1"
|
val map : ('a -> 'b) -> 'a option -> 'b option |
"map f inp" evaluates to "match inp with None -> None | Some x -> Some (f x)"
|
val partition : ('a -> bool) -> 'a option -> 'a option * 'a option |
"partition p inp" evaluates to
"match inp with None -> None,None | Some x -> if p x then inp,None else None,inp"
|
val to_array : 'a option -> 'a array |
Convert the option to an array of length 0 or 1
|
val to_list : 'a option -> 'a list |
Convert the option to a list of length 0 or 1
|
val to_stream : 'a option -> 'a t |
Convert the option to a stream of length 0 or 1
|