import { Result } from "./result";
export interface OptionArms<T, A> {
    Some(value: T): A;
    None(): A;
}
export declare class Option<T> {
    #private;
    private constructor();
    static None<T>(): Option<T>;
    static Some<T>(value: T): Option<T>;
    static from<T>(value: T | null | undefined): Option<T>;
    match<A>(option: OptionArms<T, A>): A;
    unwrap(): T;
    unwrapOr(value: T): T;
    unwrapOrElse(f: () => T): T;
    expect(message: string): T;
    inspect(f: (value: T) => any): Option<T>;
    insert(value: T): T;
    getOrInsert(value: T): T;
    getOrInsertWith(f: () => T): T;
    isNone(): boolean;
    isSome(): boolean;
    isSomeAnd(f: (value: T) => boolean): boolean;
    intoResult<E>(error: E): Result<T, E>;
    map<F>(predicate: (value: T) => F): Option<F>;
    mapOr<V>(value: V, f: (value: T) => V): V;
    mapOrElse<V>(defaultF: () => V, f: (value: T) => V): V;
    filter(predicate: (value: T) => boolean): Option<T>;
    flatten(): Option<T>;
    take(): Option<T>;
    takeIf(predicate: (value: T) => boolean): Option<T>;
    replace(value: T): Option<T>;
    zip<U>(other: Option<U>): Option<[T, U]>;
    zipWith<O, R>(other: Option<O>, f: (self: T, other: O) => R): Option<R>;
    unzip<U>(): [Option<T>, Option<U>];
    transpose<E>(): Result<Option<T>, E>;
    okOr<E>(err: E): Result<T, E>;
    okOrElse<E>(err: () => E): Result<T, E>;
    and<U>(option: Option<U>): Option<U>;
    andThen<U>(f: (value: T) => Option<U>): Option<U>;
    or(option: Option<T>): Option<T>;
    orElse(f: () => Option<T>): Option<T>;
    xor(option: Option<T>): Option<T>;
    [Symbol.iterator](): Generator<T | undefined, void, unknown>;
    iter(): (T | undefined)[];
}
export declare const None: typeof Option.None;
export declare const Some: typeof Option.Some;