import { BaseError } from 'make-error';
import { Constrained } from '../../core';
export declare class InvalidNegativeIntegerError extends BaseError {
    constructor();
}
export declare const negativeIntegerSymbol: unique symbol;
export type NegativeInteger = Constrained<typeof negativeIntegerSymbol, number>;
export declare function isNegativeInteger(input: unknown): input is NegativeInteger;
export declare function negativeInteger(input: unknown): NegativeInteger;