import { BaseError } from 'make-error';
import { Constrained } from '../../core';
export declare class InvalidNegativeNumberError extends BaseError {
    constructor();
}
export declare const negativeNumberSymbol: unique symbol;
export type NegativeNumber = Constrained<typeof negativeNumberSymbol, number>;
export declare function isNegativeNumber(input: unknown): input is NegativeNumber;
export declare function negativeNumber(input: unknown): NegativeNumber;