export declare const Nominal: <A extends Brand<unknown, UniqueSymbol>>() => (a: ExtractType<A>) => A;
export declare type Nominal<A, B extends UniqueSymbol> = A & Brand<A, B>;
export declare type SimpleNominal<A> = Nominal<A, UniqueSymbol>;
declare type UniqueSymbol = {
    [key: string]: symbol;
};
declare type ExtractType<A extends Nominal<unknown, UniqueSymbol>> = A['_raw'];
declare type Brand<A, B extends UniqueSymbol> = {
    /**
     * **Do not use this as a value it is not initialised.** It is used for inference.
     */
    _raw: A;
    /**
     * **Do not use this as a value it is not initialised.** It is used for uniqueness.
     */
    _brand: Unique<B>;
};
declare type Unique<A extends {
    [key: string]: symbol;
}> = A[keyof A];
export {};