import { ErrImpl } from "./Err.class.ts";
export declare class NoneImpl {
    readonly some = false;
    readonly none = true;
    expect(msg: string): never;
    unwrap(): never;
    safeUnwrap(): never;
    unwrapOr<T2>(val: T2): T2;
    unwrapOrElse<T2>(f: () => T2): T2;
    map(_mapper: unknown): None;
    mapOr<T2>(default_: T2, _mapper: unknown): T2;
    mapOrElse<U>(default_: () => U, _mapper: unknown): U;
    andThen(_op: unknown): None;
    toResult<E>(error: E): ErrImpl<E>;
    toString(): string;
}
export declare const None: NoneImpl;
export type None = NoneImpl;
//# sourceMappingURL=None.class.d.ts.map