Option (melange.Js.Option)

type 'a t = 'a option

module Js := Js__.Js_internal

val some : 'a -> 'a option

val isSome : 'a option -> bool

val isSomeValue : ('a -> 'a -> bool) Js.Fn.arity2 -> 'a -> 'a option -> bool

val isNone : 'a option -> bool

val getExn : 'a option -> 'a

val equal : ('a -> 'b -> bool) Js.Fn.arity2 -> 'a option -> 'b option -> bool

val andThen : ('a -> 'b option) Js.Fn.arity1 -> 'a option -> 'b option

val map : ('a -> 'b) Js.Fn.arity1 -> 'a option -> 'b option

val getWithDefault : 'a -> 'a option -> 'a

val default : 'a -> 'a option -> 'a

deprecated Use getWithDefault instead since default has special meaning in ES module

val filter : ('a -> bool) Js.Fn.arity1 -> 'a option -> 'a option

val firstSome : 'a option -> 'a option -> 'a option